154 results on '"Dai XF"'
Search Results
2. Large negative magnetoresistance in quaternary Heusler alloy Ni50Mn8Fe17Ga25 melt-spun ribbons
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Liu, ZH, Liu, H., Zhang, XX, Zhang, XK, Xiao, JQ, Zhu, ZY, Dai, XF, Liu, GD, Chen, JL, Wu, GH, Liu, ZH, Liu, H., Zhang, XX, Zhang, XK, Xiao, JQ, Zhu, ZY, Dai, XF, Liu, GD, Chen, JL, and Wu, GH
- Abstract
Quaternary Heusler alloy Ni50Mn8Fe17Ga25 ribbons have been prepared by the melt-spun method. The ribbons exhibit large negative magnetoresistance (MR){=[R(H)-R(0)]/R(0)} over a wide temperature region, particularly in the region during the martensitic phase transformation. The MR decreases significantly after annealing. The large MR is isotropic and is mainly attributed to the local magnetic disorders, magnetic clusters, and heterogeneity. The maximum MR at martensitic transformation may be due to the redistribution of electrons and the increase of phase boundary scattering. This feature adds a useful functionality to the already interesting Heusler alloys. 2005 American Institute of Physics.
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- 2005
3. Martensitic transformation and magnetic properties of Heusler alloy Ni-Fe-Ga ribbon
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Liu, ZH, Liu, H., Zhang, XX, Zhang, M., Dai, XF, Hu, HN, Chen, JL, Wu, GH, Liu, ZH, Liu, H., Zhang, XX, Zhang, M., Dai, XF, Hu, HN, Chen, JL, and Wu, GH
- Abstract
The martensitic transformation and magnetic properties of ferromagnetic shape memory alloy Ni-50 (+ x) Fe25 - x Ga-25 (x = -1, 0, 1, 2, 3, 4) ribbons have been systematically studied. It has been found that with the increase of Ni concentration, the martensitic transformation temperature increases, but the Curie temperature decreases. Both the two-step thermally induced structural transformation and the one-step transition have been observed in NiFeGa alloys with different compositions. It is found that the two-step transition became the one-step transition after the ribbon being heat treated at 873 K or higher. X-ray diffraction patterns show that only L2(1) --> B2 transition occurs in the samples treated at 873 K, while the gamma phase will form in the samples treated at higher temperature. Transmission electron microscopy (TEM) studies show that the alloys with martensitic transformation temperature above the room temperature are non-modulated martensite with the large domain size, being different from the stoichiometric Ni2FeGa alloy that is a modulated martensite with small domain size. The influences of Fe substitution for Ni in Ni2FeGa on the saturation magnetization and exchange interaction are also discussed. (C) 2004 Elsevier B.V. All rights reserved.
- Published
- 2004
4. Effectiveness of an integrated cerebral protection protocol in type A aortic dissection surgery: an inverse probability treatment weighting analysis.
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Shen FM, Lin YM, Huang MC, Liu JP, Huang LC, Chen LW, and Dai XF
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- Humans, Male, Female, Middle Aged, Retrospective Studies, Hypothermia, Induced methods, Treatment Outcome, Aged, Risk Factors, Operative Time, Perfusion methods, Cerebrovascular Circulation physiology, Aortic Aneurysm, Thoracic surgery, Aortic Dissection surgery, Postoperative Complications prevention & control, Postoperative Complications etiology
- Abstract
Background: Cerebral protection strategies in type A aortic dissection (TAAD) surgery are critical yet inconclusive. We propose an integrated cerebral protection protocol. This study aimed to evaluate the effectiveness of this protocol., Methods: From January 2020 to December 2022, 85 patients were treated with an integrated protocol incorporating bilateral antegrade cerebral perfusion (ACP) and moderate hypothermia, with measures to prevent the shedding of thrombus or endothelial debris (BACP group), while traditional protocols were applied to 273 additional patients (UACP group). Inverse probability treatment weighting (IPTW) was performed to balance baseline characteristics. Three logistic regression models were used to evaluate the relationship between the two cerebral protection strategies and neurologic complications. Stepwise logistic regression was further employed to identify risk factors for cerebral complications., Results: Baseline characteristics were balanced after IPTW adjustment. The BACP group had a significantly shorter operative time (364.79 vs. 397.61 min, P = 0.022), significantly fewer neurologic complications (5.6% vs. 15.9%, P = 0.032), and transient neurologic injury (3.0% vs. 12.5%, P = 0.035). Binary multivariable logistic regression analysis showed that the cerebral complication risk was 3.14 times greater with the traditional protocol compared to the integrated protocol (odds ratio[OR]:3.14, 95%confidence interval[CI]:1.19-8.27, P = 0.020). Stepwise logistic regression confirmed that cerebral complications were dramatically increased with unilateral ACP (OR:2.99, 95%CI:1.14-7.82, P = 0.025), while bilateral ACP had a significant impact on decreasing cerebral complications., Conclusions: Our integrated protocol effectively minimizes postoperative cerebral complications. Moderate hypothermia combined with BACP and measures to prevent brain debris could be adopted as an effective strategy for cerebral protection in TAAD surgery., Competing Interests: Declarations. Ethics approval and consent to participate: Ethical approval for this study protocol was obtained from the Institutional Review Board of the affiliated hospital of Fujian Medical University (approval ID: 2023KYB334). The methods were performed in accordance with the Declaration of Helsinki. Written informed consent for the operation was obtained from all the participants and singed before surgery. Consent for publication: Not applicable. Competing interests: The authors declare no competing interests., (© 2025. The Author(s).)
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- 2025
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5. Pharmacological actions of the bioactive compounds of Epimedium on the male reproductive system: current status and future perspective.
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Liu SP, Li YF, Zhang D, Li CY, Dai XF, Lan DF, Cai J, Zhou H, Song T, Zhao YY, He ZX, Tan J, and Zhang JD
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- Male, Humans, Flavonoids pharmacology, Flavonoids therapeutic use, Animals, Epimedium chemistry, Genitalia, Male drug effects
- Abstract
Abstract: Compounds isolated from Epimedium include the total flavonoids of Epimedium , icariin, and its metabolites (icaritin, icariside I, and icariside II), which have similar molecular structures. Modern pharmacological research and clinical practice have proved that Epimedium and its active components have a wide range of pharmacological effects, especially in improving sexual function, hormone regulation, anti-osteoporosis, immune function regulation, anti-oxidation, and anti-tumor activity. To date, we still need a comprehensive source of knowledge about the pharmacological effects of Epimedium and its bioactive compounds on the male reproductive system. However, their actions in other tissues have been reviewed in recent years. This review critically focuses on the Epimedium , its bioactive compounds, and the biochemical and molecular mechanisms that modulate vital pathways associated with the male reproductive system. Such intrinsic knowledge will significantly further studies on the Epimedium and its bioactive compounds that protect the male reproductive system and provide some guidances for clinical treatment of related male reproductive disorders., (Copyright ©The Author(s)(2024).)
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- 2025
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6. The potential of Burkholderia gladioli KRS027 in plant growth promotion and biocontrol against Verticillium dahliae revealed by dual transcriptome of pathogen and host.
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Wang D, Lin H, Shan Y, Song J, Zhang DD, Dai XF, Han D, and Chen JY
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- Gossypium microbiology, Gossypium growth & development, Plant Development, Plant Growth Regulators metabolism, Seedlings microbiology, Seedlings growth & development, Gene Expression Profiling, Host-Pathogen Interactions, Biological Control Agents, Indoleacetic Acids metabolism, Gibberellins metabolism, Verticillium, Plant Diseases microbiology, Plant Diseases prevention & control, Burkholderia gladioli growth & development, Burkholderia gladioli genetics, Burkholderia gladioli metabolism, Transcriptome, Ascomycota growth & development, Ascomycota genetics
- Abstract
Verticillium dahliae is a destructive, soil-borne pathogen that causes significant losses on numerous important dicots. Recently, beneficial microbes inhabiting the rhizosphere have been exploited and used to control plant diseases. In the present study, Burkholderia gladioli KRS027 demonstrated excellent inhibitory effects against Verticillium wilt in cotton seedlings. Plant growth and development was promoted by affecting the biosynthesis and signaling pathways of brassinosteroids (BRs), gibberellins (GAs), and auxins, consequently promoting stem elongation, shoot apical meristem, and root apical tissue division in cotton. Furthermore, based on the host transcriptional response to V. dahliae infection, it was found that KRS027 modulates the plants to maintain cell homeostasis and respond to other pathogen stress. Moreover, KRS027 induced disruption of V. dahliae cellular structures, as evidenced by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses. Based on the comparative transcriptomic analysis between KRS027 treated and control group of V. dahliae, KRS027 induced substantial alterations in the transcriptome, particularly affecting genes encoding secreted proteins, small cysteine-rich proteins (SCRPs), and protein kinases. In addition, KRS027 suppressed the growth of different clonal lineages of V. dahliae strains through metabolites, and volatile organic compounds (VOCs) released by KRS027 inhibited melanin biosynthesis and microsclerotia development. These findings provide valuable insights into an alternative biocontrol strategy for Verticillium wilt, demonstrating that the antagonistic bacterium KRS027 holds promise as a biocontrol agent for promoting plant growth and managing disease occurrence., (Copyright © 2024 The Authors. Published by Elsevier GmbH.. All rights reserved.)
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- 2024
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7. Clinical Outcomes and Left Ventricular Functional Remodeling after Extracorporeal Membrane Oxygenation Assisted Percutaneous Coronary Intervention in Patients with Ischemic Cardiomyopathy: A Single-Center Retrospective Observational Study of 76 Cases.
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Dong Y, Xu Z, Dai XF, Chen LW, and Lin ZQ
- Abstract
Background: Ischemic cardiomyopathy (ICM) is a common condition that leads to left ventricular (LV) functional remodeling and poor prognosis. Extracorporeal membrane oxygenation (ECMO) can provide temporary circulatory support and facilitate percutaneous coronary intervention (PCI) in patients with ICM and hemodynamic instability. However, the impact of ECMO-assisted PCI on LV functional remodeling and clinical outcomes in ICM patients is unclear., Methods: We retrospectively analyzed 76 patients with ICM who underwent ECMO-assisted PCI at our institution between January 2013 and December 2022. We assessed the changes in LV functional remodeling using echocardiography at baseline and 12 months after the procedure. We also evaluated the incidence of major adverse cardiac and cerebrovascular events (MACCEs) and ECMO-related complications during hospitalization and at one-year follow-up., Results: The mean baseline left ventricular ejection fraction (LVEF) was 29.98 ± 2.65%. The rate of complete revascularization was 58%. The median duration of ECMO support was 38.99 hours. The most common ECMO-related complications were bleeding (8%) and lower extremity ischemia (5%). The one-year mortality rate was 30%. The overall freedom from MACCEs at 12 months was 59% (95% confidence interval (CI): 49-71%). LVEF increased significantly after the procedure from baseline to 6 months, yet decreased slightly at 12 months, although it was still higher than the baseline value. Wall motion score index (WMSI), end-diastolic volume index (EDVI), and end-systolic volume index (ESVI) decreased significantly from baseline to 12 months, indicating an improvement in LV function and a reduction in LV size., Conclusions: In a high-volume tertiary center with extensive experience in advanced heart failure therapies and a dedicated ECMO team, ECMO-assisted PCI demonstrated feasibility and safety in patients with ischemic cardiomyopathy. However, the rate of complete revascularization was modest at 58%. Despite the high-risk profile of the patients, ECMO-assisted PCI was associated with a significant improvement in LV functional remodeling and a favorable 12-month survival rate. Further prospective studies are needed to confirm these findings and to identify the optimal patient and device selection criteria for ECMO-assisted PCI., Competing Interests: The authors declare no conflict of interest., (Copyright: © 2024 The Author(s). Published by IMR Press.)
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- 2024
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8. Left ventricular recovery after total arterial coronary artery bypass grafting versus conventional coronary artery bypass grafting in patients with multivessel coronary artery disease and reduced left ventricular ejection fraction.
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Lin ZQ, Chen X, Xu Z, Chen LW, and Dai XF
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- Humans, Male, Female, Retrospective Studies, Middle Aged, Aged, Ventricular Function, Left physiology, Recovery of Function, Ventricular Dysfunction, Left physiopathology, Ventricular Dysfunction, Left surgery, Ventricular Dysfunction, Left diagnostic imaging, Treatment Outcome, Mitral Valve Insufficiency surgery, Mitral Valve Insufficiency physiopathology, Mitral Valve Insufficiency diagnostic imaging, Coronary Artery Disease surgery, Coronary Artery Disease physiopathology, Coronary Artery Bypass methods, Stroke Volume physiology, Echocardiography
- Abstract
Background: We compared total arterial revascularization (TAR) versus conventional revascularization (CR) in terms of left ventricular function recovery in patients with multivessel coronary artery disease (CAD) and reduced left ventricular ejection fraction (LVEF)., Methods: We conducted a retrospective cohort study of 162 consecutive patients with multivessel CAD and reduced LVEF who underwent isolated coronary artery bypass grafting at our institution between January 2013 and July 2022. We assessed left ventricular function by transthoracic echocardiography at admission, before discharge, and at follow-up of 3, 6, and 12 months, using LVEF, global longitudinal peak strain, end-diastolic volume index, and end-systolic volume index. We also evaluated mitral valve regurgitation and graft patency rate at 1 year., Results: The TAR group had a significantly higher increase in LVEF and global longitudinal peak strain, and a significantly lower decrease in end-diastolic volume index and end-systolic volume index than the CR group at 6 and 12 months after surgery. The TAR group also had a significantly lower degree of mitral valve regurgitation than the CR group at all-time points within 12 months after surgery. The TAR group had a significantly higher graft patency rate than the CR group at 12 months. There was no significant difference in hospital mortality or repeat revascularization between the groups., Conclusions: TAR was associated with better recovery of left ventricular function than CR in patients with multivessel CAD and reduced LVEF. Further studies are needed to confirm these findings in this high-risk population., (© The Author(s) 2024. Published by Oxford University Press on behalf of Fellowship of Postgraduate Medicine. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
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- 2024
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9. The acyl-CoA-binding protein VdAcb1 is essential for carbon starvation response and contributes to virulence in Verticillium dahliae .
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Zhuang J, Zhang YD, Sun WX, Zong J, Li JJ, Dai XF, Klosterman SJ, Chen JY, Tian L, Subbarao KV, and Zhang DD
- Abstract
In the face of carbon, nitrogen, and phosphorus starvation, microorganisms have evolved adaptive mechanisms to maintain growth. In a previous study, we identified a protein predicted to contain acyl-CoA-binding domains in the plant pathogenic fungus Verticillium dahliae . The predicted protein, designated VdAcb1, possesses an atypical signal peptide. However, the functions of this acyl-CoA-binding protein in V. dahliae are not clear. In this research, in vivo or in vitro assays confirmed that VdAcb1 is secreted extracellularly from V. dahliae , although it does not have the typical signal peptide. Furthermore, the unconventional secretion of VdAcb1 was dependent on VdGRASP, a member of the compartment for unconventional protein secretion (CUPS). The deletion mutant strain of VdAcb1 (Δ VdAcb1) exhibited significant sensitivity to carbon starvation. RNA-seq revealed that the expression of genes related to filamentous growth (MSB2 pathway) and sugar transport were regulated by VdAcb1 under conditions of carbon starvation. Yeast one-hybrid experiments further showed that the expression of VdAcb1 was positively regulated by the transcription factor VdMsn4. The Δ VdAcb1 strain showed significantly reduced virulence on Gossypium hirsutum and Nicotiana benthamiana . We hypothesize that under conditions of carbon starvation, the expression of VdAcb1 is activated by VdMsn4 and VdAcb1 is secreted into the extracellular space. In turn, this activates the downstream MAPK pathway to enhance filamentous growth and virulence of V. dahliae ., Supplementary Information: The online version contains supplementary material available at 10.1007/s42994-024-00175-3., Competing Interests: Conflict of interestThe authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. All authors declare that they have no competing interests., (© The Author(s) 2024.)
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- 2024
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10. Glycosylation editing: an innovative therapeutic opportunity in precision oncology.
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Dai XF, Yang YX, and Yang BZ
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Cancer is still one of the most arduous challenges in the human society, even though humans have found many ways to try to conquer it. With our incremental understandings on the impact of sugar on human health, the clinical relevance of glycosylation has attracted our attention. The fact that altered glycosylation profiles reflect and define different health statuses provide novel opportunities for cancer diagnosis and therapeutics. By reviewing the mechanisms and critical enzymes involved in protein, lipid and glycosylation, as well as current use of glycosylation for cancer diagnosis and therapeutics, we identify the pivotal connection between glycosylation and cellular redox status and, correspondingly, propose the use of redox modulatory tools such as cold atmospheric plasma (CAP) in cancer control via glycosylation editing. This paper interrogates the clinical relevance of glycosylation on cancer and has the promise to provide new ideas for laboratory practice of cold atmospheric plasma (CAP) and precision oncology therapy., (© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
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- 2024
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11. Transcriptome analysis of Gossypium hirsutum cultivar Zhongzhimian No.2 uncovers the gene regulatory networks involved in defense against Verticillium dahliae.
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Ma XY, Zhou XH, Liu BB, Zhang YJ, Zhu H, Li Y, Wang ZS, Dai XF, Chen JY, Su ZQ, and Li R
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- Ascomycota physiology, Gene Expression Regulation, Plant, Transcriptome, Verticillium, Gossypium genetics, Gossypium microbiology, Gossypium immunology, Plant Diseases microbiology, Plant Diseases genetics, Plant Diseases immunology, Disease Resistance genetics, Gene Regulatory Networks, Gene Expression Profiling
- Abstract
Background: Cotton is globally important crop. Verticillium wilt (VW), caused by Verticillium dahliae, is the most destructive disease in cotton, reducing yield and fiber quality by over 50% of cotton acreage. Breeding resistant cotton cultivars has proven to be an efficient strategy for improving the resistance of cotton to V. dahliae. However, the lack of understanding of the genetic basis of VW resistance may hinder the progress in deploying elite cultivars with proven resistance., Results: We planted the VW-resistant Gossypium hirsutum cultivar Zhongzhimian No.2 (ZZM2) in an artificial greenhouse and disease nursery. ZZM2 cotton was subsequently subjected to transcriptome sequencing after Vd991 inoculation (6, 12, 24, 48, and 72 h post-inoculation). Several differentially expressed genes (DEGs) were identified in response to V. dahliae infection, mainly involved in resistance processes, such as flavonoid and terpenoid quinone biosynthesis, plant hormone signaling, MAPK signaling, phenylpropanoid biosynthesis, and pyruvate metabolism. Compared to the susceptible cultivar Junmian No.1 (J1), oxidoreductase activity and reactive oxygen species (ROS) production were significantly increased in ZZM2. Furthermore, gene silencing of cytochrome c oxidase subunit 1 (COX1), which is involved in the oxidation-reduction process in ZZM2, compromised its resistance to V. dahliae, suggesting that COX1 contributes to VW resistance in ZZM2., Conclusions: Our data demonstrate that the G. hirsutum cultivar ZZM2 responds to V. dahliae inoculation through resistance-related processes, especially the oxidation-reduction process. This enhances our understanding of the mechanisms regulating the ZZM2 defense against VW., (© 2024. The Author(s).)
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- 2024
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12. Insights into the biocontrol and plant growth promotion functions of Bacillus altitudinis strain KRS010 against Verticillium dahliae.
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Shan Y, Wang D, Zhao FH, Song J, Zhu H, Li Y, Zhang XJ, Dai XF, Han D, and Chen JY
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- Ascomycota physiology, Verticillium physiology, Phylogeny, Biological Control Agents, Plant Diseases microbiology, Plant Diseases prevention & control, Bacillus physiology, Gossypium microbiology, Gossypium growth & development
- Abstract
Background: Verticillium wilt, caused by the fungus Verticillium dahliae, is a soil-borne vascular fungal disease, which has caused great losses to cotton yield and quality worldwide. The strain KRS010 was isolated from the seed of Verticillium wilt-resistant Gossypium hirsutum cultivar "Zhongzhimian No. 2.", Results: The strain KRS010 has a broad-spectrum antifungal activity to various pathogenic fungi as Verticillium dahliae, Botrytis cinerea, Fusarium spp., Colletotrichum spp., and Magnaporthe oryzae, of which the inhibition rate of V. dahliae mycelial growth was 73.97% and 84.39% respectively through confrontation test and volatile organic compounds (VOCs) treatments. The strain was identified as Bacillus altitudinis by phylogenetic analysis based on complete genome sequences, and the strain physio-biochemical characteristics were detected, including growth-promoting ability and active enzymes. Moreover, the control efficiency of KRS010 against Verticillium wilt of cotton was 93.59%. After treatment with KRS010 culture, the biomass of V. dahliae was reduced. The biomass of V. dahliae in the control group (Vd991 alone) was 30.76-folds higher than that in the treatment group (KRS010+Vd991). From a molecular biological aspect, KRS010 could trigger plant immunity by inducing systemic resistance (ISR) activated by salicylic acid (SA) and jasmonic acid (JA) signaling pathways. Its extracellular metabolites and VOCs inhibited the melanin biosynthesis of V. dahliae. In addition, KRS010 had been characterized as the ability to promote plant growth., Conclusions: This study indicated that B. altitudinis KRS010 is a beneficial microbe with a potential for controlling Verticillium wilt of cotton, as well as promoting plant growth., (© 2024. The Author(s).)
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- 2024
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13. Functional analysis of the mating type genes in Verticillium dahliae.
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Zhang YD, Ji XB, Zong J, Dai XF, Klosterman SJ, Subbarao KV, Zhang DD, and Chen JY
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- Ascomycota genetics, Ascomycota physiology, Pheromones metabolism, Fungal Proteins genetics, Fungal Proteins metabolism, Verticillium, Genes, Mating Type, Fungal genetics
- Abstract
Background: Populations of the plant pathogenic fungus Verticillium dahliae display a complex and rich genetic diversity, yet the existence of sexual reproduction in the fungus remains contested. As pivotal genes, MAT genes play a crucial role in regulating cell differentiation, morphological development, and mating of compatible cells. However, the functions of the two mating type genes in V. dahliae, VdMAT1-1-1, and VdMAT1-2-1, remain poorly understood., Results: In this study, we confirmed that the MAT loci in V. dahliae are highly conserved, including both VdMAT1-1-1 and VdMAT1-2-1 which share high collinearity. The conserved core transcription factor encoded by the two MAT loci may facilitate the regulation of pheromone precursor and pheromone receptor genes by directly binding to their promoter regions. Additionally, peptide activity assays demonstrated that the signal peptide of the pheromone VdPpg1 possessed secretory activity, while VdPpg2, lacked a predicted signal peptide. Chemotactic growth assays revealed that V. dahliae senses and grows towards the pheromones FO-a and FO-α of Fusarium oxysporum, as well as towards VdPpg2 of V. dahliae, but not in response to VdPpg1. The findings herein also revealed that VdMAT1-1-1 and VdMAT1-2-1 regulate vegetative growth, carbon source utilization, and resistance to stressors in V. dahliae, while negatively regulating virulence., Conclusions: These findings underscore the potential roles of VdMAT1-1-1 and VdMAT1-2-1 in sexual reproduction and confirm their involvement in various asexual processes of V. dahliae, offering novel insights into the functions of mating type genes in this species., (© 2024. The Author(s).)
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- 2024
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14. [Technical exploration and early results of two-port total thoracoscopic aortic-mitral double-valve replacement].
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Chen B, Dai XF, Wang T, Zheng ZH, Xu Z, Wang W, Jiang X, and Yang QL
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- Humans, Female, Male, Middle Aged, Retrospective Studies, Adult, Treatment Outcome, Mitral Valve surgery, Young Adult, Postoperative Complications, Rheumatic Heart Disease surgery, Heart Valve Prosthesis Implantation methods, Thoracoscopy methods, Aortic Valve surgery
- Abstract
Objective: To examine the clinical outcomes of patients undergoing total thoracoscopic aortic-mitral double-valve replacement. Methods: This is a retrospective case series study. The clinical data of 50 patients who underwent double-valve replacement under a total thoracoscopic two-port approach from November 2021 to August 2022 in the Department of Cardiovascular Surgery, Fujian Medical University Union Hospital were retrospectively analyzed. There were 32 males and 18 females, with an age of (55.3±8.8) years (range: 21 to 62 years). Among them, 36 cases had rheumatic heart disease and 14 cases had infective endocarditis. The 3
rd intercostal space between the right anterior axillary line and the midclavicular line was selected as the main operating hole, the total thoracoscopic double-valve replacement were successfully carried out. Baseline data, intraoperative information, surgical outcomes, and postoperative complications were collected for all patients. Results: The cardiopulmonary bypass time was (168.2±30.9) minutes (range: 125 to 187 minutes), the aortic cross-clamping time was (118.8±16.5) minutes (range: 96 to 147 minutes). Five patients received bioprosthetic valves, and 45 received mechanical prosthetic valves. Postoperative mechanical ventilation lasted (9.6±3.4) hours (range: 5.1 to 14.2 hours), the ICU stay was (24.8±7.3) hours (range: 16.3 to 30.1 hours), and the postoperative hospital stay was (6.5±1.2) days (range: 5.0 to 8.0 days). Four patients received red blood cell transfusions of (2.7±0.9) units (range: 2 to 4 units), and the postoperative chest drainage volume was (222.1±56.3) ml (range: 175 to 289 ml). No deaths occurred intraoperatively or in the early postoperative period. One patient required reoperation due to bleeding in the aortic incision. Three patients had mild to moderate paravalvular leakage around the prosthetic aortic valve, with no cases of third-degree atrioventricular block or conversions to median sternotomy. Conclusions: The early outcomes of total thoracoscopic double valve replacement surgery are satisfactory, demonstrating safety and efficacy. This surgical approach expands the scope of total thoracoscopic cardiac surgery, which warrants further investigation and research.- Published
- 2024
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15. Association of gene polymorphisms and the decreased expression of long non-coding RNA LOC553103 with rheumatoid arthritis.
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Tao SS, Fang X, Xu LZ, Zhang RD, Luo QQ, Tang J, Dai XF, Xu SZ, Yang XK, and Pana HF
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Background: Long non-coding RNAs (lncRNAs) are involved in many key bioprocesses, including the occurrence and development of rheumatoid arthritis (RA). We aimed to analyze the association of genetic variants of long non-coding RNA LOC553103 and its peripheral blood mononuclear cells (PBMC) expression with RA., Methods: We enrolled 457 RA patients and 551 healthy controls and conducted a case-control study to analyze the relationship between LOC553103 gene rs272879 and the susceptibility of RA by TaqMan single nucleotide polymorphism genotyping. Among them, we sampled 92 cases and 92 controls, respectively, to detect the PBMC level of LOC553103 using quantitative real-time polymerase chain reaction technology. We explored the association between LOC553103 rs272879 and its PBMC expression levels in 71 RA patients. Mann-Whitney, Chi-square, and Spearman correlation analysis were used for statistical analysis and P-value <.05 was considered statistically significant., Results: The genotype frequency of LOC553103 rs272879 CC was increased, and CG was decreased in RA patients compared to the control group (χ2 = 6.772, P = .034). The LOC553103 expression level in PBMC of RA patients was downregulated compared to healthy control (Z = -4.497, P < .001). Moreover, negative correlations were observed between the PBMC level of LOC553103 and erythrocyte sedimentation rate (rs = -0.262, P = .018), white blood cell count (rs = -0.382, P = .004), platelet (rs = -0.293, P = .030), and disease activity score in 28 joints (rs = -0.271, P = .016) in RA patients., Conclusions: This study provides the first evidence supporting an association between LOC553103 gene polymorphisms and susceptibility of RA and a relationship of PBMC level of LOC553103 with clinical manifestations and laboratory indicators of RA patients., (© The Author(s) 2024. Published by Oxford University Press on behalf of Fellowship of Postgraduate Medicine. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
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- 2024
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16. [Impact of different angles of pulmonary surfactant administration on bronchopulmonaryplasia and intracranial hemorrhage in preterm infants: a prospective randomized controlled study].
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Dai XF, Zhu AA, Xie TT, Xiong YH, Meng L, and Chen MW
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- Humans, Infant, Newborn, Prospective Studies, Male, Female, Pulmonary Surfactants administration & dosage, Bronchopulmonary Dysplasia prevention & control, Bronchopulmonary Dysplasia drug therapy, Bronchopulmonary Dysplasia etiology, Infant, Premature, Intracranial Hemorrhages prevention & control, Intracranial Hemorrhages chemically induced
- Abstract
Objectives: To investigate the effects of different angles of pulmonary surfactant (PS) administration on the incidence of bronchopulmonary dysplasia and intracranial hemorrhage in preterm infants., Methods: A prospective study was conducted on 146 preterm infants (gestational age <32 weeks) admitted to the Department of Neonatology, Provincial Hospital Affiliated to Anhui Medical University from January 2019 to May 2023. The infants were randomly assigned to different angles for injection of pulmonary surfactant groups: 0° group (34 cases), 30° group (36 cases), 45° group (38 cases), and 60° group (38 cases). Clinical indicators and outcomes were compared among the groups., Results: The oxygenation index was lower in the 60° group compared with the other three groups, with shorter invasive ventilation time and oxygen use time, and a lower incidence of bronchopulmonary dysplasia than the other three groups ( P <0.05). The incidence of intracranial hemorrhage was lower in the 60° group compared to the 0° group ( P <0.05). The cure rate in the 60° group was higher than that in the 0° group and the 30° group ( P <0.05)., Conclusions: The clinical efficacy of injection of pulmonary surfactant at a 60° angle is higher than other angles, reducing the incidence of intracranial hemorrhage and bronchopulmonary dysplasia in preterm infants.
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- 2024
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17. Quality of life in young patients with acute type a aortic dissection in China: comparison with Marfan syndrome and non-Marfan syndrome.
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Lin XF, Xie LF, Zhang ZF, He J, Xie YL, Dai XF, and Chen LW
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- Young Adult, Humans, Middle Aged, Quality of Life, Pain, China, Marfan Syndrome complications, Marfan Syndrome diagnosis, Aortic Dissection diagnostic imaging, Aortic Dissection surgery
- Abstract
Background: There is a paucity of Chinese studies evaluating the quality of life (QoL) in young acute type A aortic dissection (AAAD) patients with Marfan syndrome., Methods: Young adult AAAD patients (younger than 45 years old) underwent surgical treatment at our institution from January 2017 to December 2020 were consecutive enrolled. The hospital survivors completed 1 year of follow up. Patients were divided into two groups according to the presence or absence of Marfan syndrome (MFS). A 1:1 propensity score matching (PSM) with a caliper 0.2 was conducted to balance potential bias in baseline. The follow-up data were analyzed primarily for change in quality of life and anxiety status., Results: After PSM, 32 comparable pairs were matched. The baseline data were comparable and postoperative complications were similar between groups. In terms of SF-36 scale, the role physical, bodily pain, role emotional and mental health subscales were no significantly improved in MFS patients over time. At 1 year after discharged, the subscale of mental health and bodily pain were significantly lower in the MFS group than in the non-MFS group. In terms of HADS assessments, the level of anxiety in MFS patients was significantly higher than in non-MFS patients at 1 year after discharged., Conclusions: The QoL in young AAAD patients with MFS is lower than those without MFS after surgery. This may be associated with the uncontrollable persistent chronic pain and the uncertainty and concerns for the disease's progression., (© 2024. The Author(s).)
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- 2024
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18. Technique and early outcomes of total thoracoscopic double-valve replacement.
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Chen B, Wang T, Xu Z, Zheng ZH, Wang W, Jiang X, and Dai XF
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Objective: Reports on aortic and mitral double-valve replacement through total thoracoscopy are scarce, with surgical techniques constantly evolving. We aimed to compare the feasibility and safety between total thoracoscopic double-valve replacement and median sternotomy double-valve replacement., Methods: From November 2021 to March 2023, we performed double-valve replacements in 76 patients using the total thoracoscopic double-valve replacement. The control group comprised 77 patients who underwent median sternotomy double-valve replacement. We analyzed data on baseline characteristics, perioperative events, and early postoperative outcomes., Results: In the total thoracoscopic double-valve replacement group, the cardiopulmonary bypass and aortic crossclamping times were 174.20 ± 38.87 minutes and 120.20 ± 19.54 minutes, respectively; both were significantly longer compared with those in the median sternotomy double-valve replacement group (cardiopulmonary bypass: 123.65 ± 15.33 minutes; aortic crossclamping: 82.86 ± 9.51 minutes, P < .001). The total thoracoscopic double-valve replacement group exhibited an extended operative duration, with a mean of 4.40 ± 0.76 hours, in contrast to 3.21 ± 0.68 hours in the median sternotomy double-valve replacement group ( P < .001). Postoperatively, the total thoracoscopic double-valve replacement group demonstrated a significantly shorter mechanical ventilation duration (9.29 ± 3.12 hours) and reduced intensive care unit stay time (24.31 ± 7.29 hours) than the median sternotomy double-valve replacement group (11.49 ± 4.27 hours and 26.76 ± 5.89 hours, respectively; P values of .019 and .040, respectively). Furthermore, the total thoracoscopic double-valve replacement group experienced a shorter postoperative hospitalization time, averaging 6.21 ± 1.58 days, than the median sternotomy double-valve replacement group (8.35 ± 1.07 days, P < .001). The total thoracoscopic double-valve replacement group also exhibited significantly lower chest drainage volume (average 223.91 ± 53.93 mL) than the median sternotomy double-valve replacement group (382.56 ± 61.87 mL, P < .001). In terms of transfusion rates, the total thoracoscopic double-valve replacement group (9.21%) showed a marked reduction compared with the median sternotomy double-valve replacement group (36.36%, P < .001). Both groups had similar major complications., Conclusions: The initial results of the total thoracoscopic double-valve replacement underscore its safety and efficacy. This approach extends the applicability of total thoracoscopic cardiac surgery and warrants deeper exploration., Competing Interests: The authors reported no conflicts of interest. The Journal policy requires editors and reviewers to disclose conflicts of interest and to decline handling or reviewing manuscripts for which they may have a conflict of interest. The editors and reviewers of this article have no conflicts of interest., (© 2024 The Author(s).)
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- 2024
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19. Mid-term outcomes of total neointima implantation in surgical repair of acute type A aortic dissection.
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Lin Y, Xie LF, Zhang ZF, He J, Dai XF, Chen LW, and Chen MF
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- Humans, Aorta, Thoracic surgery, Neointima etiology, Neointima surgery, Stents, Treatment Outcome, Retrospective Studies, Aortic Aneurysm, Thoracic etiology, Aortic Aneurysm, Thoracic surgery, Blood Vessel Prosthesis Implantation adverse effects, Blood Vessel Prosthesis Implantation methods, Hypertension etiology, Aortic Dissection surgery
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Total neointima implantation (patch neointima technique + triple-branched stent graft placement) has been performed in proximal aortic repair for acute type A aortic dissection (ATAAD) for more than 10 years at a center. However, there is no report on the mid-term outcomes with a control group of the surgical procedure. Consequently, the authors aimed to evaluate the safety and efficacy of this technique in this study. Patients who underwent the total neointima implantation were classified as Group A, and those who underwent the conventional aortic root reconstruction with the "sandwich" technique and the total aortic arch replacement were classified as Group B. Furthermore, the authors described the preoperative characteristics, operative data, and patient outcomes. Group A patients experienced a shorter surgery duration, lower volumes of perioperative bleeding, and fewer red blood cell transfusions. The incidence of neurological complications was significantly reduced in Group A. All patients maintained a normal range of proximal aortic sizes after surgery. Kaplan-Meier analysis revealed no significant differences between the patients in the two groups regarding cumulative mortality and the incidence of moderate-to-severe aortic insufficiency. In well-selected patients, total neointima implantation is an alternative procedure for the surgical repair of ATAAD., (© 2023 The Authors. The Journal of Clinical Hypertension published by Wiley Periodicals LLC.)
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- 2024
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20. Characterization of the Endophytic Bacillus subtilis KRS015 Strain for Its Biocontrol Efficacy Against Verticillium dahliae .
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Song J, Wang D, Han D, Zhang DD, Li R, Kong ZQ, Dai XF, Subbarao KV, and Chen JY
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- Bacillus subtilis genetics, Phylogeny, Plant Diseases microbiology, Gossypium genetics, Plant Extracts, Disease Resistance physiology, Gene Expression Regulation, Plant, Verticillium physiology, Ascomycota, Acremonium
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Endophytes play important roles in promoting plant growth and controlling plant diseases. Verticillium wilt is a vascular wilt disease caused by Verticillium dahliae , a widely distributed soilborne pathogen that causes significant economic losses on cotton each year. In this study, an endophyte KRS015, isolated from the seed of the Verticillium wilt-resistant Gossypium hirsutum 'Zhongzhimian No. 2', was identified as Bacillus subtilis by morphological, phylogenetic, physiological, and biochemical analyses. The volatile organic compounds (VOCs) produced by KRS015 or its cell-free fermentation extract had significant antagonistic effects on various pathogenic fungi, including V. dahliae . KRS015 reduced Verticillium wilt index and colonization of V. dahliae in treated cotton seedlings significantly; the disease reduction rate was ∼62%. KRS015 also promoted plant growth, potentially mediated by the growth-related cotton genes GhACL5 and GhCPD-3 . The cell-free fermentation extract of KRS015 triggered a hypersensitivity response, including reactive oxygen species (ROS) and expression of resistance-related plant genes. VOCs from KRS015 also inhibited germination of conidia and the mycelial growth of V. dahliae , and were mediated by growth and development-related genes such as VdHapX , VdMcm1 , Vdpf , and Vel1 . These results suggest that KRS015 is a potential agent for controlling Verticillium wilt and promoting growth of cotton., Competing Interests: The author(s) declare no conflict of interest.
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- 2024
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21. Two-incision totally thoracoscopic mitral valve repair combined with radiofrequency atrial fibrillation ablation in rheumatic mitral valve disease: Early results of a case series of 43 consecutive patients.
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Xu Z, Dai XF, Lin F, Chen LW, and Lin ZQ
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- Humans, Middle Aged, Mitral Valve diagnostic imaging, Mitral Valve surgery, Retrospective Studies, Treatment Outcome, Thoracoscopy, Atrial Fibrillation diagnosis, Atrial Fibrillation surgery, Atrial Fibrillation complications, Atrial Flutter surgery, Heart Valve Diseases complications, Heart Valve Diseases surgery, Rheumatic Heart Disease complications, Rheumatic Heart Disease diagnosis, Rheumatic Heart Disease surgery, Catheter Ablation methods
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Background: Few studies have reported the outcomes of two-incision total thoracoscopic mitral valve repair (MVr) and concomitant radiofrequency atrial fibrillation ablation (RAFA) in patients with rheumatic mitral valve disease and atrial fibrillation (AF)., Methods: We retrospectively analyzed 43 consecutive patients who underwent MVr and RAFA through two-incision total thoracoscopic technique from October 2018 to June 2022. We collected data on baseline characteristics, perioperative outcomes, and early-term results., Results: The mean age was 55.67 ± 7.64 years and 29 (67.4%) patients had New York Heart Association (NYHA) class III or IV. The mean cardiopulmonary bypass (CPB) time was 115.56 ± 8.53 min and aortic clamping time was 81.42 ± 7.54 min. There were no in-hospital deaths or strokes. The mean preoperative mitral valve orifice area (MVOA) was 0.95 (0.84-1.16) cm2 and increased to 2.56 (2.41-2.87) cm2 at discharge and 2.54 (2.44-2.76) cm2 at 3 months after surgery (P < .001). At discharge, 32 (74.4%) patients were in sinus rhythm, 7 (20.9%) were in junctional or atrial flutter rhythm, and 4 (9.3%) remained in AF. At 6 months, 35 (81.4%) patients were in sinus rhythm, 5 (11.63%) were in junctional or atrial flutter rhythm, and 3 (4.7%) were in AF., Conclusions: Two-incision total thoracoscopic MVr and RAFA is a safe and effective procedure that can improve the MVOA and promote conversion of AF to sinus rhythm in patients with rheumatic mitral valve disease and AF. Further studies with larger sample size and longer follow-up are needed to confirm the long-term benefits of this approach., Competing Interests: Declaration of Competing Interest None declared., (Copyright © 2023 Elsevier B.V. All rights reserved.)
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- 2023
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22. The emerging role of exosomes in the development of testicular.
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Li CY, Liu SP, Dai XF, Lan DF, Song T, Wang XY, Kong QH, Tan J, and Zhang JD
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- Male, Humans, Infertility, Male metabolism, Animals, Spermatozoa metabolism, Exosomes metabolism, Exosomes physiology, Testis metabolism, Testis growth & development, Spermatogenesis physiology
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The mechanisms of testicular development in mammals are complex. Testis is an organ that produces sperm and secretes androgens. It is rich in exosomes and cytokines that mediate signal transduction between tubule germ cells and distal cells, promoting testicular development and spermatogenesis. Exosomes are nanoscale extracellular vesicles that transmit information between cells. By transmitting information, exosomes play an important role in male infertility diseases such as azoospermia, varicocele, and testicular torsion. However, due to the wide range of sources of exosomes, extraction methods are numerous and complex. Therefore, there are many difficulties in studying the mechanisms of exosomal effects on normal development and male infertility. Therefore, in this review, first, we introduce the formation of exosomes and methods for culturing testis and sperm. Then, we introduce the effects of exosomes on different stages of testicular development. Finally, we summarize the prospects and shortcomings of exosomes when used in clinical applications. We lay the theoretical foundation for the mechanism of the influence of exosomes on normal development and male infertility., (Copyright © 2023 Copyright: © The Author(s)(2023).)
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- 2023
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23. The Effect of Preventing Oxidative Stress and Its Mechanisms in the Extract from Sonchus brachyotus DC. Based on the Nrf2-Keap1-ARE Signaling Pathway.
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Zhang MJ, Sun WW, Yang J, Shi DD, Dai XF, and Li XM
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As the organ with the largest contact area with the outside world, the intestine is home to a large number of microorganisms and carries out the main functions of food digestion, absorption, and metabolism. Therefore, there is a very active metabolism of substances and energy in the gut, which is easily attacked by oxygen free radicals. What is more, oxidative stress can gradually and slowly cause very serious damage to the gut. Hence, maintaining redox balance is essential for maintaining environmental balance in the gut. Our previous studies have demonstrated that the extract of Sonchus brachyotus DC. (SBE) has been shown to be capable of repairing oxidative damage, while it has not been demonstrated that it can prevent oxidative stress or how it develops. In this work, we investigated the prevention of oxidative stress and its mechanism in SBE based on the H
2 O2 -induced oxidative damage model in Caco-2 cells; the results indicate that SBE can reduce the contents of ROS and MDA and increase the activities of SOD and CAT in preventing oxidative stress. Then, at the mRNA and protein level, SBE can up-regulate and down-regulate the expression of related genes ( NFE2L2 , KEAP1 , HMOX1 , NQO1 , SOD1 , CAT , and GPX1 ) and proteins involved in the Nrf2-Keap1-ARE signaling pathway. In conclusion, SBE plays a preventive role in oxidative stress through the Nrf2-Keap1-ARE signaling pathway.- Published
- 2023
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24. Functional Characterization of Verticillium dahliae Race 3-Specific Gene VdR3e in Virulence and Elicitation of Plant Immune Responses.
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Tan Q, Li R, Liu L, Wang D, Dai XF, Song LM, Zhang DD, Kong ZQ, Klosterman SJ, Usami T, Subbarao KV, Liang WX, and Chen JY
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- Virulence genetics, Plant Immunity, Virulence Factors genetics, Virulence Factors metabolism, Plant Diseases microbiology, Verticillium genetics, Ascomycota
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Verticillium dahliae is a soilborne fungal pathogen that causes disease on many economically important crops. Based on the resistance or susceptibility of differential cultivars in tomato, isolates of V. dahliae are divided into three races. Avirulence ( avr ) genes within the genomes of the three races have also been identified. However, the functional role of the avr gene in race 3 isolates of V. dahliae has not been characterized. In this study, bioinformatics analysis showed that VdR3e, a cysteine-rich secreted protein encoded by the gene characterizing race 3 in V. dahliae , was likely obtained by horizontal gene transfer from the fungal genus Bipolaris . We demonstrate that VdR3e causes cell death by triggering multiple defense responses. In addition, VdR3e localized at the periphery of the plant cell and triggered immunity depending on its subcellular localization and the cell membrane receptor BAK1. Furthermore, VdR3e is a virulence factor and shows differential pathogenicity in race 3-resistant and -susceptible hosts. These results suggest that VdR3e is a virulence factor that can also interact with BAK1 as a pathogen-associated molecular pattern (PAMP) to trigger immune responses. IMPORTANCE Based on the gene-for-gene model, research on the function of avirulence genes and resistance genes has had an unparalleled impact on breeding for resistance in most crops against individual pathogens. The soilborne fungal pathogen, Verticillium dahliae, is a major pathogen on many economically important crops. Currently, avr genes of the three races in V. dahliae have been identified, but the function of avr gene representing race 3 has not been described. We investigated the characteristics of VdR3e-mediated immunity and demonstrated that VdR3e acts as a PAMP to activate a variety of plant defense responses and induce plant cell death. We also demonstrated that the role of VdR3e in pathogenicity was host dependent. This is the first study to describe the immune and virulence functions of the avr gene from race 3 in V. dahliae, and we provide support for the identification of genes mediating resistance against race 3., Competing Interests: The authors declare no conflict of interest.
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- 2023
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25. Genome-wide identification and analysis of a cotton secretome reveals its role in resistance against Verticillium dahliae.
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Li R, Ma XY, Zhang YJ, Zhang YJ, Zhu H, Shao SN, Zhang DD, Klosterman SJ, Dai XF, Subbarao KV, and Chen JY
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- Gossypium genetics, Acremonium, Gene Expression Regulation, Plant, Plant Proteins genetics, Plant Proteins metabolism, Disease Resistance genetics, Plant Diseases genetics, Secretome, Verticillium metabolism, Ascomycota
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Background: The extracellular space between the cell wall and plasma membrane is a battlefield in plant-pathogen interactions. Within this space, the pathogen employs its secretome to attack the host in a variety of ways, including immunity manipulation. However, the role of the plant secretome is rarely studied for its role in disease resistance., Results: Here, we examined the secretome of Verticillium wilt-resistant Gossypium hirsutum cultivar Zhongzhimian No.2 (ZZM2, encoding 95,327 predicted coding sequences) to determine its role in disease resistance against the wilt causal agent, Verticillium dahliae. Bioinformatics-driven analyses showed that the ZZM2 genome encodes 2085 secreted proteins and that these display disequilibrium in their distribution among the chromosomes. The cotton secretome displayed differences in the abundance of certain amino acid residues as compared to the remaining encoded proteins due to the localization of these putative proteins in the extracellular space. The secretome analysis revealed conservation for an allotetraploid genome, which nevertheless exhibited variation among orthologs and comparable unique genes between the two sub-genomes. Secretome annotation strongly suggested its involvement in extracellular stress responses (hydrolase activity, oxidoreductase activity, and extracellular region, etc.), thus contributing to resistance against the V. dahliae infection. Furthermore, the defense response genes (immunity marker NbHIN1, salicylic acid marker NbPR1, and jasmonic acid marker NbLOX4) were activated to varying degrees when Nicotina benthamiana leaves were agro-infiltrated with 28 randomly selected members, suggesting that the secretome plays an important role in the immunity response. Finally, gene silencing assays of 11 members from 13 selected candidates in ZZM2 displayed higher susceptibility to V. dahliae, suggesting that the secretome members confer the Verticillium wilt resistance in cotton., Conclusions: Our data demonstrate that the cotton secretome plays an important role in Verticillium wilt resistance, facilitating the development of the resistance gene markers and increasing the understanding of the mechanisms regulating disease resistance., (© 2023. BioMed Central Ltd., part of Springer Nature.)
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- 2023
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26. Unlocking antagonistic potential of Bacillus amyloliquefaciens KRS005 to control gray mold.
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Qi HY, Wang D, Han D, Song J, Ali M, Dai XF, Zhang XJ, and Chen JY
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To establish a safe, efficient, and simple biocontrol measure for gray mold disease caused by Botrytis cinerea , the basic characteristics and antifungal activity of KRS005 were studied from multiple aspects including morphological observation, multilocus sequence analysis and typing (MLSA-MLST), physical-biochemical assays, broad-spectrum inhibitory activities, control efficiency of gray mold, and determination of plant immunity. The strain KRS005, identified as Bacillus amyloliquefaciens , demonstrated broad-spectrum inhibitory activities against various pathogenic fungi by dual confrontation culture assays, of which the inhibition rate of B. cinerea was up to 90.3%. Notably, through the evaluation of control efficiency, it was found that KRS005 fermentation broth could effectively control the occurrence of tobacco leaves gray mold by determining the lesion diameter and biomass of B. cinerea on tobacco leaves still had a high control effect after dilution of 100 folds. Meanwhile, KRS005 fermentation broth had no impact on the mesophyll tissue of tobacco leaves. Further studies showed that plant defense-related genes involved in reactive oxygen species (ROS), salicylic acid (SA), and jasmonic acid (JA)-related signal pathways were significantly upregulated when tobacco leaves were sprayed with KRS005 cell-free supernatant. In addition, KRS005 could inhibit cell membrane damage and increase the permeability of B. cinerea . Overall, KRS005, as a promising biocontrol agent, would likely serve as an alternative to chemical fungicides to control gray mold., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Qi, Wang, Han, Song, Ali, Dai, Zhang and Chen.)
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- 2023
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27. Cyclosporine A-induced gingival overgrowth in renal transplant patients accompanied by epithelial-to-mesenchymal transition.
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Chen MZ, Dai XF, Sun Y, Yu YC, and Yang F
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- Humans, Cyclosporine adverse effects, Immunosuppressive Agents adverse effects, Kidney Transplantation, Gingival Overgrowth chemically induced, Gingival Hyperplasia chemically induced
- Abstract
Objective: To investigate the association between the prevalence of cyclosporin A-induced gingival overgrowth and the expression of the epithelial-to-mesenchymal transition factors in the gingival tissues of renal transplant patients., Background: Gingival overgrowth (GO) is a frequent complication in organ transplant patients treated with the immunosuppressant cyclosporin A (CsA). The epithelial-to-mesenchymal transition (EMT) is considered a factor contributing to CsA-induced GO. However, current knowledge on this topic is sparse., Methods: Sixty-three renal transplant patients were divided into two groups according to the occurrence of GO: those with gingival overgrowth (GO+ group) and those without gingival overgrowth (GO- group). Data on age, sex, and use of immunosuppressant and calcium channel blocker medications, serum creatinine values, peak concentrations of blood CsA, and gingival hyperplasia scores were recorded to identify clinically pathogenic factors. Gingival tissues from five patients with CsA-induced GO and five healthy subjects were selected for histomorphological observation with hematoxylin-eosin staining, Masson staining, and immunohistochemical staining. The mRNA expression of EMT factors was detected with reverse transcription-quantitative PCR., Results: The use of CsA significantly increased the prevalence of GO in renal transplant patients. The expression of α-SMA, SMAD4, and TGM2 was upregulated and that of E-cadherin was downregulated in the gingival tissues of patients with CsA-induced GO compared with those of the corresponding controls., Conclusion: Treatment with CsA is closely related to the occurrence of GO in renal transplant patients and EMT plays an important role in CsA-induced gingival tissue hyperplasia., (© 2023 The Authors. Journal of Periodontal Research published by John Wiley & Sons Ltd.)
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- 2023
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28. Thioredoxin VdTrx1, an unconventional secreted protein, is a virulence factor in Verticillium dahliae .
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Tian L, Zhuang J, Li JJ, Zhu H, Klosterman SJ, Dai XF, Chen JY, Subbarao KV, and Zhang DD
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Understanding how plant pathogenic fungi adapt to their hosts is of critical importance to securing optimal crop productivity. In response to pathogenic attack, plants produce reactive oxygen species (ROS) as part of a multipronged defense response. Pathogens, in turn, have evolved ROS scavenging mechanisms to undermine host defense. Thioredoxins (Trx) are highly conserved oxidoreductase enzymes with a dithiol-disulfide active site, and function as antioxidants to protect cells against free radicals, such as ROS. However, the roles of thioredoxins in Verticillium dahliae , an important vascular pathogen, are not clear. Through proteomics analyses, we identified a putative thioredoxin (VdTrx1) lacking a signal peptide. VdTrx1 was present in the exoproteome of V. dahliae cultured in the presence of host tissues, a finding that suggested that it plays a role in host-pathogen interactions. We constructed a VdTrx1 deletion mutant Δ VdTrx1 that exhibited significantly higher sensitivity to ROS stress, H
2 O2 , and tert -butyl hydroperoxide ( t -BOOH). In vivo assays by live-cell imaging and in vitro assays by western blotting revealed that while VdTrx1 lacking the signal peptide can be localized within V. dahliae cells, VdTrx1 can also be secreted unconventionally depending on VdVps36, a member of the ESCRT-II protein complex. The Δ VdTrx1 strain was unable to scavenge host-generated extracellular ROS fully during host invasion. Deletion of VdTrx1 resulted in higher intracellular ROS levels of V. dahliae mycelium, displayed impaired conidial production, and showed significantly reduced virulence on Gossypium hirsutum , and model plants, Arabidopsis thaliana and Nicotiana benthamiana . Thus, we conclude that VdTrx1 acts as a virulence factor in V. dahliae ., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Tian, Zhuang, Li, Zhu, Klosterman, Dai, Chen, Subbarao and Zhang.)- Published
- 2023
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29. [Early results of left ventricular assist device implantation for the treatment of heart failure].
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Chen LW, Wu QS, Dai XF, Dong Y, Li QZ, Fang GH, and Zhang GC
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- Humans, Male, Adult, Middle Aged, Stroke Volume, Retrospective Studies, Ventricular Function, Left, Treatment Outcome, Heart-Assist Devices, Heart Failure surgery
- Abstract
Twenty-four male patients who underwent left ventricular assist device (LVAD) implantation due to advanced heart failure in Union Hospital, Fujian Medical University from June 2019 to June 2022 were retrospectively included. The age of patients was 32-61 (48.4±8.4) years. Everheat-Ⅰ, HeartCon and Corheart 6 left ventricular assist systems were used in 10, 6 and 8 cases, respectively. All patients were discharged successfully without mechanical failure, thrombosis or secondary thoracotomy for hemostasis. Early postoperative hemodynamics were significantly improved, left ventricular systolic diameter was reduced, left ventricular ejection fraction was gradually improved, and no hemolysis occurred. The patients were followed up for 3 to 39 (17.9±8.6) months, the cardiac function was restored to grade Ⅰ to Ⅱ, and the 6-minute walking test distance increased significantly. Therefore, satisfactory early results can be achieved with left ventricular assist device implantation for the treatment of heart failure.
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- 2023
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30. Insights into the Biocontrol Function of a Burkholderia gladioli Strain against Botrytis cinerea.
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Wang D, Luo WZ, Zhang DD, Li R, Kong ZQ, Song J, Dai XF, Alkan N, and Chen JY
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Pathogenic fungi are the main cause of yield loss and postharvest loss of crops. In recent years, some antifungal microorganisms have been exploited and applied to prevent and control pathogenic fungi. In this study, an antagonistic bacteria KRS027 isolated from the soil rhizosphere of a healthy cotton plant from an infected field was identified as Burkholderia gladioli by morphological identification, multilocus sequence analysis, and typing (MLSA-MLST) and physiobiochemical examinations. KRS027 showed broad spectrum antifungal activity against various phytopathogenic fungi by secreting soluble and volatile compounds. KRS027 also has the characteristics of plant growth promotion (PGP) including nitrogen fixation, phosphate, and potassium solubilization, production of siderophores, and various enzymes. KRS027 is not only proven safe by inoculation of tobacco leaves and hemolysis test but also could effectively protect tobacco and table grapes against gray mold disease caused by Botrytis cinerea. Furthermore, KRS027 can trigger plant immunity by inducing systemic resistance (ISR) activated by salicylic acid- (SA), jasmonic acid- (JA), and ethylene (ET)-dependent signaling pathways. The extracellular metabolites and volatile organic compounds (VOCs) of KRS027 affected the colony extension and hyphal development by downregulation of melanin biosynthesis and upregulation of vesicle transport, G protein subunit 1, mitochondrial oxidative phosphorylation, disturbance of autophagy process, and degrading the cell wall of B. cinerea. These results demonstrated that B. gladioli KRS027 would likely become a promising biocontrol and biofertilizer agent against fungal diseases, including B. cinerea, and would promote plant growth. IMPORTANCE Searching the economical, eco-friendly and efficient biological control measures is the key to protecting crops from pathogenic fungi. The species of Burkholderia genus are widespread in the natural environment, of which nonpathogenic members have been reported to have great potential for biological control agents and biofertilizers for agricultural application. Burkholderia gladioli strains, however, need more study and application in the control of pathogenic fungi, plant growth promotion, and induced systemic resistance (ISR). In this study, we found that a B. gladioli strain KRS027 has broad spectrum antifungal activity, especially in suppressing the incidence of gray mold disease caused by Botrytis cinerea, and can stimulate plant immunity response via ISR activated by salicylic acid- (SA), jasmonic acid- (JA), and ethylene (ET)-dependent signaling pathways. These results indicate that B. gladioli KRS027 may be a promising biocontrol and biofertilizer microorganism resource in agricultural applications.
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- 2023
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31. Genome Resource for the Verticillium Wilt Resistant Gossypium hirsutum Cultivar Zhongzhimian No. 2.
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Li R, Zhang YJ, Ma XY, Li SK, Klosterman SJ, Chen JY, Subbarao KV, and Dai XF
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- Genes, Plant, Disease Resistance genetics, Plant Diseases microbiology, Gene Expression Regulation, Plant, Gossypium microbiology, Verticillium genetics
- Abstract
Verticillium wilt, caused by the fungal pathogen Verticillium dahliae , is the major cause of disease-related yield losses in cotton ( Gossypium hirsutum ). Despite these losses, the major cultivars of G. hirsutum remain highly susceptible to Verticillium wilt. The lack of understanding on the genetic basis for Verticillium wilt resistance may further hinder progress in deploying elite cultivars with proven resistance, such as the wilt resistant G. hirsutum cultivar Zhongzhimian No. 2. To help remedy this knowledge gap, we sequenced the whole genome of Zhongzhimian No. 2 and assembled it from a combination of PacBio long reads, Illumina short reads, and high-throughput chromosome conformation capture technologies. The final assembly of the genome was 2.33 Gb, encoding 95,327 predicted coding sequences. The GC content was 34.39% with 99.2% of the bases anchored to 26 pseudo-chromosomes that ranged from 53.8 to 127.7 Mb. This resource will help gain a detailed understanding of the genomic features governing high yield and Verticillium wilt resistance in this cultivar. Comparative genomics will be particularly helpful, since there are several published genomes of other Gossypium species. [Formula: see text] Copyright © 2022 The Author(s). This is an open access article distributed under the CC BY 4.0 International license.
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- 2023
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32. Impact of frailty status on clinical and functional outcomes after concomitant valve replacement and bipolar radiofrequency ablation in patients aged 65 years and older.
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Lin ZQ, Chen XJ, Dai XF, Chen LW, and Lin F
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- Humans, Aged, Retrospective Studies, Postoperative Complications epidemiology, Frailty complications, Radiofrequency Ablation, Catheter Ablation, Atrial Fibrillation surgery
- Abstract
Background: To evaluate the prognostic value of frailty in older recipients of concomitant valve replacement (VR) and bipolar radiofrequency ablation (BRFA), we examined whether clinical and functional outcomes differed between frail and non-frail groups of older patients referred for concomitant VR and BRFA., Methods: In a single-center retrospective observational cohort study, we compared the clinical and functional outcomes in frail versus non-frail patients. Frailty was assessed using the 5-item Cardiovascular Health Study (CHS) frailty scale. Patients were divided into two groups, frail and non-frail. Functional outcome was assessed using the internationally validated Atrial Fibrillation Effect on QualiTy-of-Life (AFEQT) questionnaire., Results: We enrolled 185 patients aged ≥ 65 years who underwent concomitant VR and BRFA. About 36.2% (n = 67) of the patients were included in the frail group and the remaining patients (n = 118) in the non-frail group. Follow-up was complete with a median duration of 58 months (interquartile range 44-76 months). Significant differences were observed between the two groups with respect to postoperative pulmonary complications (frail vs. non-frail patients, 50.74% vs. 22.9%, respectively, P < .001) and hospital mortality (10.45% vs. 1.69%, respectively, P = .021). The frail group had a higher adjusted risk for all-cause mortality (adjusted HR 4.06; 95% CI 1.33 to 12.38; P = .014) and all-cause hospitalization (adjusted HR 2.24; 95% CI 1.12 to 4.50; P = .023). Frailty was associated with lower overall AFEQT scores at baseline (Estimate, - 0.400; 95% CI - 0.532 to - 0.267; P < .001). Compared to the non-frail group, the frail group continued to have lower overall AFEQT scores with no significant improvement in follow-up at 1 year and 2 years after concomitant VR and BRFA., Conclusion: Frail patients had lower baseline AFEQT scores and were more likely to have adverse outcomes from postoperative pulmonary complications, and frailty was also an independent risk factor for long-term all-cause mortality and all-cause rehospitalization. Further studies are needed to assess the impact of frailty., (© 2022. The Author(s).)
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- 2022
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33. The secretome of Verticillium dahliae in collusion with plant defence responses modulates Verticillium wilt symptoms.
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Zhang DD, Dai XF, Klosterman SJ, Subbarao KV, and Chen JY
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- Acremonium, Plant Diseases microbiology, Secretome, Ascomycota, Verticillium physiology
- Abstract
Verticillium dahliae is a notorious soil-borne pathogen that enters hosts through the roots and proliferates in the plant water-conducting elements to cause Verticillium wilt. Historically, Verticillium wilt symptoms have been explained by vascular occlusion, due to the accumulation of mycelia and plant biomacromolecule aggregation, and also by phytotoxicity caused by pathogen-secreted toxins. Beyond the direct cytotoxicity of some members of the secretome, this review systematically discusses the roles of the V. dahliae secretome in vascular occlusion, including the deposition of polysaccharides as an outcome of plant cell wall destruction, the accumulation of fungal mycelia, and modulation of plant defence responses. By modulating plant defences and hormone levels, the secretome manipulates the vascular environment to induce Verticillium wilt. Thus, the secretome of V. dahliae colludes with plant defence responses to modulate Verticillium wilt symptoms, and thereby bridges the historical concepts of both toxin production by the pathogen and vascular occlusion as the cause of wilting symptoms., (© 2022 The Authors. Biological Reviews published by John Wiley & Sons Ltd on behalf of Cambridge Philosophical Society.)
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- 2022
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34. Extensive repair of acute type A aortic dissection through a partial upper sternotomy and using complete stent-graft replacement of the arch.
- Author
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Xie XB, Dai XF, Fang GH, Qiu ZH, Jiang DB, and Chen LW
- Subjects
- Adult, Aorta, Thoracic surgery, Humans, Retrospective Studies, Stents, Sternotomy adverse effects, Treatment Outcome, Aortic Dissection diagnostic imaging, Aortic Dissection surgery, Aortic Aneurysm, Thoracic diagnostic imaging, Aortic Aneurysm, Thoracic surgery, Blood Vessel Prosthesis Implantation adverse effects
- Abstract
Background: Partial upper sternotomy (mini-ER) can be used in some adult cardiac surgeries but is seldom performed in the treatment of acute type A aortic dissection (AAAD). This study aimed to assess the feasibility and short-term outcomes of complete stent-graft replacement of the arch with triple-branched stent graft for AAAD through a mini-ER., Methods: From 2015 to 2018, 254 patients with AAAD underwent complete stent-graft replacement of the arch with a triple-branched stent graft. Replacement was performed with conventional full sternotomy (con-ER) in 142 patients and with mini-ER in the other 112 patients. Using propensity score matching, the clinical data were compared between 100 patients in the mini-ER group and 100 patients in the con-ER group., Results: After propensity score matching, there were no significant between-group differences in aortic cross-clamp time, cardiopulmonary bypass time, or total operative time. The amount of mediastinal drainage and number of red blood cell units were significantly lower in the mini-ER group compared with the con-ER group (P < .001). The intubation time was significantly shorter in the mini-ER group (P < .001). The treatment costs were also lower in the mini-ER group (P < .001). There were no significant between-group differences in 30-day mortality (9% vs 8%; P > .99) or postoperative complications., Conclusions: This study shows that extensive repair of AAAD through a mini-ER is feasible. It was superior to con-ER in terms of blood loss, postoperative ventilation time, and treatment costs., (Copyright © 2020 The American Association for Thoracic Surgery. Published by Elsevier Inc. All rights reserved.)
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- 2022
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35. Early Clinical Outcomes of Thoracoscopic Mitral Valvuloplasty: The First 90 Cases.
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Lin XF, Xu Z, Zheng ZH, Wang T, and Dai XF
- Subjects
- Humans, Mitral Valve surgery, Reproducibility of Results, Sternotomy methods, Mitral Valve Insufficiency surgery, Cardiac Surgical Procedures
- Abstract
Background: We reported 90 cases of thoracoscopic mitral valvuloplasty in its early stages and sought to analyze early clinical outcomes., Methods: Ninety consecutive patients, who underwent thoracoscopic mitral valvuloplasty at our institute between April 2020 and December 2021, were assessed for outcomes. Clinical data, including baseline characteristics, operative data, postoperative data, and early follow-up results, were collected. The early clinical outcomes were used to assess the reliability and efficiency of this technique., Results: No in-hospital death occurred. One patient underwent a median sternotomy for bleeding. Intraoperative transesophageal echocardiography revealed no mitral regurgitation in 82 patients and mitral regurgitation of 0-2 cm2 in six. The remaining two patients with mitral regurgitation >2 cm2 experienced serious systolic anterior motion but underwent successful re-valvuloplasty during a second pump-up. the mean cardiopulmonary bypass time was 177.1±54.8 min and aortic clamping time, 114.0±44.9 min. Each patient received a prosthetic ring (CG Future™), and 64 patients received artificial chordae with an average of 2.7±1.5 (ranging from 1 to 6) pairs. The mean follow up was 8.8±7.0 (range, 1-22 months), while two patients were lost to follow up. Recurrent severe mitral regurgitation was observed in one patient three months after the operation, and mitral valve replacement was performed via median sternotomy. During follow up, one patient died of upper respiratory tract infection, and one suffered from low cardiac output., Conclusions: Thoracoscopic mitral valvuloplasty is safe and effective and, once surgeons overcome the learning curve, can achieve excellent early clinical outcomes.
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- 2022
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36. Sleep deprivation affects sex hormones secretion by regulating the expression of the circadian clock gene in the hypothalamus and pituitary via the PI3K/Akt signaling pathway in pregnant rats.
- Author
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Lin RJ and Dai XF
- Subjects
- ARNTL Transcription Factors genetics, ARNTL Transcription Factors metabolism, Animals, Circadian Rhythm genetics, Female, Gene Expression Regulation genetics, Pituitary Gland metabolism, Pregnancy, Progesterone, Rats, Rats, Wistar, Signal Transduction, Circadian Clocks genetics, Circadian Clocks physiology, Gonadal Steroid Hormones genetics, Gonadal Steroid Hormones metabolism, Hypothalamus metabolism, Phosphatidylinositol 3-Kinases genetics, Phosphatidylinositol 3-Kinases metabolism, Proto-Oncogene Proteins c-akt genetics, Proto-Oncogene Proteins c-akt metabolism, Sleep Deprivation genetics, Sleep Deprivation metabolism
- Abstract
Sleep deprivation (SD) has many deleterious health effects and occurs in more than 70% of pregnant women. However, the changes in sex hormones and relevant mechanisms after SD have not been well clarified. The aim of the present study was to explore the effects of SD on the secretion of sex hormones and the underlying mechanisms. Twelve pregnant Wistar rats were divided into control (CON, n = 6) and SD (n = 6) groups. Pregnant rats in the SD group were deprived of sleep for 18 h, and allowed free rest for 6 h, and then the above procedures were repeated until delivery. The CON group lived in a 12 h light/dark light cycle environment. Estradiol (E2) and progesterone (P4) levels were detected by enzyme-linked immunosorbent assay (ELISA), and the expression of circadian clock genes, Bmal1, Clock and Per2, in hypothalamus and pituitary gland tissues were evaluated by immunohistochemistry (IHC) and reverse transcription-quantitative polymerase chain reaction (RT-qPCR). The PI3K and Akt phosphorylation levels in the hypothalamic and pituitary tissues were determined by Western blot. The results showed that, compared with the CON group, the SD group exhibited significantly reduced serum E2 and P4 levels, down-regulated Bmal1, Clock and Per2 expression, as well as decreased phosphorylation levels of PI3K and Akt. But there was no significant difference of the total PI3K and Akt protein expression levels between the two groups. These results suggest that SD might affect the expression of the circadian clock genes in the hypothalamus and pituitary via PI3K/Akt pathway, and subsequently regulate the secretion of sex hormones in the pregnant rats, which hints the important roles of SD-induced changes of serum sex hormone levels in the pregnant rats.
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- 2022
37. Do obese patients benefit from isolated aortic valve replacement through a partial upper sternotomy?
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Xie XB, Dai XF, Qiu ZH, Jiang DB, Wu QS, Dong Y, and Chen LW
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- Humans, Length of Stay, Minimally Invasive Surgical Procedures methods, Obesity complications, Retrospective Studies, Sternotomy methods, Treatment Outcome, Aortic Valve surgery, Heart Valve Prosthesis Implantation methods
- Abstract
Objective: Controversial opinions exist for aortic valve replacement (AVR) through partial upper sternotomy in obese patients. Moreover, this study sought to investigate the potential clinical advantage of partial upper sternotomy aortic valve replacement (mini-AVR) over conventional full sternotomy aortic valve replacement (con-AVR) in obese patients., Methods: This was a retrospective and observational study. From January 2015 to December 2020, a total of 184 obese [body mass index (BMI) ≥ 30 kg m
2 ] patients undergoing isolated primary AVR were included: 98 patients underwent conventional full sternotomy, and 86 patients underwent partial upper sternotomy. Propensity score (PS) matching was applied to eliminate the bassline imbalances in the mini-AVR and the con-AVR groups., Results: After one-to-one propensity score matching, two groups of 60 patients were obtained. No in-hospital death occurred in the two groups. In addition, cardiopulmonary bypass time and total operative time were similar across the 2 groups, but the aortic cross-clamp time was significantly shorter in the con-AVR group (P = .0.022). The amount of mediastinal drainage at 48 h after surgery (P = 0.018) and postoperative blood transfusions (P = 0.014) were significantly lower in the mini-AVR group. There was no difference in ventilation time (P = .0.145), but a shorter intensive care unit stay time (P = 0.021) in the mini-AVR group., Conclusion: This study demonstrates that aortic valve replacement through a mini-AVR in obese patients is a safe and effective procedure. It outperformed con-AVR in terms of blood loss, blood product transfusion, and ICU stay., (© 2022. The Author(s).)- Published
- 2022
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38. A secreted ribonuclease effector from Verticillium dahliae localizes in the plant nucleus to modulate host immunity.
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Yin CM, Li JJ, Wang D, Zhang DD, Song J, Kong ZQ, Wang BL, Hu XP, Klosterman SJ, Subbarao KV, Chen JY, and Dai XF
- Subjects
- Acremonium, Gossypium genetics, Plant Diseases microbiology, Plant Immunity, Ribonucleases metabolism, Nicotiana microbiology, Verticillium
- Abstract
The arms race between fungal pathogens and plant hosts involves recognition of fungal effectors to induce host immunity. Although various fungal effectors have been identified, the effector functions of ribonucleases are largely unknown. Herein, we identified a ribonuclease secreted by Verticillium dahliae (VdRTX1) that translocates into the plant nucleus to modulate immunity. The activity of VdRTX1 causes hypersensitive response (HR)-related cell death in Nicotiana benthamiana and cotton. VdRTX1 possesses a signal peptide but is unlikely to be an apoplastic effector because its nuclear localization in the plant is necessary for cell death induction. Knockout of VdRTX1 significantly enhanced V. dahliae virulence on tobacco while V. dahliae employs the known suppressor VdCBM1 to escape the immunity induced by VdRTX1. VdRTX1 homologs are widely distributed in fungi but transient expression of 24 homologs from other fungi did not yield cell death induction, suggesting that this function is specific to the VdRTX1 in V. dahliae. Expression of site-directed mutants of VdRTX1 in N. benthamiana leaves revealed conserved ligand-binding sites that are important for VdRTX1 function in inducing cell death. Thus, VdRTX1 functions as a unique HR-inducing effector in V. dahliae that contributes to the activation of plant immunity., (© 2022 The Authors. Molecular Plant Pathology published by British Society for Plant Pathology and John Wiley & Sons Ltd.)
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- 2022
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39. A polyketide synthase from Verticillium dahliae modulates melanin biosynthesis and hyphal growth to promote virulence.
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Li H, Wang D, Zhang DD, Geng Q, Li JJ, Sheng RC, Xue HS, Zhu H, Kong ZQ, Dai XF, Klosterman SJ, Subbarao KV, Chen FM, and Chen JY
- Subjects
- Fungal Proteins genetics, Fungal Proteins metabolism, Gene Expression Regulation, Fungal, Melanins metabolism, Secondary Metabolism, Virulence, Polyketide Synthases genetics, Polyketide Synthases metabolism, Verticillium metabolism
- Abstract
Background: During the disease cycle, plant pathogenic fungi exhibit a morphological transition between hyphal growth (the phase of active infection) and the production of long-term survival structures that remain dormant during "overwintering." Verticillium dahliae is a major plant pathogen that produces heavily melanized microsclerotia (MS) that survive in the soil for 14 or more years. These MS are multicellular structures produced during the necrotrophic phase of the disease cycle. Polyketide synthases (PKSs) are responsible for catalyzing production of many secondary metabolites including melanin. While MS contribute to long-term survival, hyphal growth is key for infection and virulence, but the signaling mechanisms by which the pathogen maintains hyphal growth are unclear., Results: We analyzed the VdPKSs that contain at least one conserved domain potentially involved in secondary metabolism (SM), and screened the effect of VdPKS deletions in the virulent strain AT13. Among the five VdPKSs whose deletion affected virulence on cotton, we found that VdPKS9 acted epistatically to the VdPKS1-associated melanin pathway to promote hyphal growth. The decreased hyphal growth in VdPKS9 mutants was accompanied by the up-regulation of melanin biosynthesis and MS formation. Overexpression of VdPKS9 transformed melanized hyphal-type (MH-type) into the albinistic hyaline hyphal-type (AH-type), and VdPKS9 was upregulated in the AH-type population, which also exhibited higher virulence than the MH-type., Conclusions: We show that VdPKS9 is a powerful negative regulator of both melanin biosynthesis and MS formation in V. dahliae. These findings provide insight into the mechanism of how plant pathogens promote their virulence by the maintenance of vegetative hyphal growth during infection and colonization of plant hosts, and may provide novel targets for the control of melanin-producing filamentous fungi., (© 2022. The Author(s).)
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- 2022
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40. Impact of minimally invasive mitral valve surgery on sexual dysfunction in male patients.
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Yan LL, Tang MR, Dai XF, Chen LW, and Fang GH
- Subjects
- Female, Humans, Male, Minimally Invasive Surgical Procedures adverse effects, Mitral Valve surgery, Quality of Life, Retrospective Studies, Treatment Outcome, Cardiac Surgical Procedures adverse effects, Erectile Dysfunction etiology
- Abstract
Background: Sexual dysfunction after cardiac surgery can seriously affect patients' quality of life, but the impact of cardiac surgery on sexual function has long been neglected. Compared with conventional cardiac surgery, minimally invasive cardiac surgery has the advantages of aesthetic appearance and no disruption of the sternal structure, which can greatly improve the patient's quality of life. However, studies focusing on the effects of minimally invasive mitral valve surgery (MIMVS) on sexual function have not been reported. The objective of this research was to investigate the effects of totally endoscopic mitral valve surgery on health-related quality of life and sexual function in male patients and to provide possible recommendations., Methods: Patients who underwent median sternotomy or totally endoscopic mitral valve surgery at our institution from January 2019 to December 2020 were selected using an electronic medical record system. Data were collected by questionnaires, including the MOS 36-item short-form health survey and the International Erectile Function Questionnaire., Results: There were 156 male patients who participated in our study. Of these, 112 patients completed all questionnaires. Forty-five patients (40.18%) developed postoperative sexual dysfunction, including 15 patients (29.41%) in the MIMVS group and 30 patients (49.18%) in the conventional MVS group, indicating that the incidence of sexual dysfunction could be reduced by MIMVS and that the MIMVS group scored better on the International Erectile Function Questionnaire (P < 0.05). On the evaluation of health-related quality of life, the MIMVS group scored better than the MVS group on the mental health and bodily pain subscales of the MOS 36-item short-form health survey. In addition, our study showed that postoperative sexual dysfunction was associated with physical functioning and mental health., Conclusions: In our study, totally endoscopic mitral valve surgery had less adverse effects on sexual function in male patients than conventional mitral valve surgery. In terms of health-related quality of life, totally endoscopic mitral valve surgery was superior to conventional surgery. Patients who opt for totally endoscopic mitral valve surgery may have a more satisfying and healthier sexual life than those who undergo conventional mitral valve surgery., (© 2022. The Author(s).)
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- 2022
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41. Identification of long non-coding RNAs in Verticillium dahliae following inoculation of cotton.
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Li R, Xue HS, Zhang DD, Wang D, Song J, Subbarao KV, Klosterman SJ, Chen JY, and Dai XF
- Subjects
- Disease Resistance, Gossypium microbiology, Plant Diseases microbiology, RNA, Long Noncoding genetics, Verticillium genetics, Verticillium pathogenicity
- Abstract
Long non-coding RNAs (lncRNAs) play important roles in diverse biological processes. However, these functions have not been assessed in Verticillium dahliae, a soil-borne fungal pathogen that causes devastating wilt diseases in many crops. The discovery and identity of novel lncRNAs and their association with virulence may contribute to an increased understanding of the regulation of virulence in V. dahliae. Here, we identified a total of 352 lncRNAs in V. dahliae. The lncRNAs were transcribed from all V. dahliae chromosomes, typically with shorter open reading frames, lower GC content, and fewer exons than protein-coding genes. In addition, 308 protein-coding genes located within 10 kb upstream and 10 kb downstream of lncRNAs were identified as neighboring genes, and which were considered as potential targets of lncRNA. These neighboring genes encode products involved in development, stress responses, and pathogenicity of V. dahliae, such as transcription factors (TF), kinase, and members of the secretome. Furthermore, 47 lncRNAs were significantly differentially expressed in V. dahliae following inoculation of susceptible cotton (Gossyoiumhisutum) cultivar Junmian No.1, suggesting that lncRNAs may be involved in the regulation of virulence in V. dahliae. Moreover, correlations in expression patterns between lncRNA and their neighboring genes were detected. Expression of lncRNA012077 and its neighboring gene was up-regulated 6 h following inoculation of cotton, while the expression of lncRNA007722 was down-regulated at 6 h but up-regulated at 24 h, in a pattern opposite to that of its neighboring gene. Overexpression of lncRNA012077 in wild-type strain (Vd991) enhanced its virulence on cotton while overexpression of lncRNA009491 reduced virulence. Identification of novel lncRNAs and their association with virulence may provide new targets for disease control., (Copyright © 2022. Published by Elsevier GmbH.)
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- 2022
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42. Liver X receptors agonist T0901317 exerts ferroptosis sensitization in cancer.
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Zhou MT, Li ZY, Fan J, Li PD, Wang Y, Zhang S, and Dai XF
- Subjects
- Animals, Cell Line, Tumor, Humans, Xenograft Model Antitumor Assays, Ferroptosis, Fluorocarbons pharmacology, Liver X Receptors agonists, Neoplasms pathology, Sulfonamides pharmacology
- Abstract
Numerous studies have confirmed the anticancer effects of ferroptosis on a wide range of tumors, specifically in providing new perspectives for tackling drug resistance and treating refractory tumors. Notably, mechanisms of improving tumor susceptibility to ferroptosis have been a focus of current research. This study discovered that co-treatment of LXRS agonist T0901317 and ferroptosis inducers (FINs) significantly inhibited the proliferation of cancer cells, this inhibition effect could be reversed by specific inhibitors of ferroptosis and accompanied by elevated lipid peroxides. Glutathione peroxidase 4 (GPX4) regulates T0901317 induced ferroptotic sensitization, and its overexpression dramatically reverses the joint anticancer effect of T0901317 and FINs. Furthermore, xenograft model results highly confirmed the ferroptotic sensitization effect of T0901317 in vivo. In summary, our findings indicate that drug combination and ferroptosis induction strategies provide novel options for cancer therapy.
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- 2022
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43. Verticillium dahliae CFEM proteins manipulate host immunity and differentially contribute to virulence.
- Author
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Wang D, Zhang DD, Song J, Li JJ, Wang J, Li R, Klosterman SJ, Kong ZQ, Lin FZ, Dai XF, Subbarao KV, and Chen JY
- Subjects
- Fungal Proteins genetics, Fungal Proteins metabolism, Iron metabolism, Plant Diseases microbiology, Virulence, Verticillium metabolism
- Abstract
Background: Verticillium dahliae is a fungal pathogen that causes a vascular wilt on many economically important crops. Common fungal extracellular membrane (CFEM) domain proteins including secreted types have been implicated in virulence, but their roles in this pathogen are still unknown., Results: Nine secreted small cysteine-rich proteins (VdSCPs) with CFEM domains were identified by bioinformatic analyses and their differential suppression of host immune responses were evaluated. Two of these proteins, VdSCP76 and VdSCP77, localized to the plant plasma membrane owing to their signal peptides and mediated broad-spectrum suppression of all immune responses induced by typical effectors. Deletion of either VdSCP76 or VdSCP77 significantly reduced the virulence of V. dahliae on cotton. Furthermore, VdSCP76 and VdSCP77 suppressed host immunity through the potential iron binding site conserved in CFEM family members, characterized by an aspartic acid residue in seven VdSCPs (Asp-type) in contrast with an asparagine residue (Asn-type) in VdSCP76 and VdSCP77. V. dahliae isolates carrying the Asn-type CFEM members were more virulent on cotton than those carrying the Asp-type., Conclusions: In the iron-insufficient xylem, V. dahliae is likely to employ the Asp-type CFEM members to chelate iron, and Asn-type CFEM members to suppress immunity, for successful colonization and propagation in host plants., (© 2022. The Author(s).)
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- 2022
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44. Impact of advanced maternal age on maternal and neonatal outcomes in preterm birth.
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Lu L, Li JH, Dai XF, Wei JB, Chen LH, and Hu JF
- Subjects
- Pregnancy, Female, Infant, Newborn, Humans, Adult, Adolescent, Young Adult, Maternal Age, Infant, Premature, Retrospective Studies, Birth Weight, Pregnancy Outcome epidemiology, Iatrogenic Disease, Premature Birth epidemiology, Diabetes, Gestational epidemiology, Placenta Previa epidemiology, Pre-Eclampsia epidemiology, Postpartum Hemorrhage epidemiology
- Abstract
Objectives: The aim of this study was to investigate the influence of advanced maternal age on the maternal and neonatal outcomes of preterm pregnancies., Material and Methods: The characteristics of patients admitted to the Department of Obstetrics and Gynecology, The First Affiliated Hospital of Fujian Medical University between January 2015 and March, 2019 were retrospectively reviewed. The maternal and neonatal outcomes were compared between advanced maternal age group (≥ 35 years) and younger age group (18-34 years). Statistical analysis was performed by applying the SPSS software., Results: The study population consisted of 986 pregnancies with preterm delivery and 1094 liveborn preterm infants. Multivariate analyses demonstrated that mothers of advanced age were more likely to suffer iatrogenic preterm birth, placenta previa, preeclampsia, gestational diabetes mellitus and postpartum hemorrhage, but less likely to suffer multiple gestation. In terms of neonatal outcomes, advanced maternal age was associated with a decreased rate of low birthweight in an adjusted model without multiple gestation. However, with multiple gestation included in the adjusted model, advanced maternal age was only associated with an increased rate of hyperbilirubinemia., Conclusions: Advanced maternal age was a risk factor for adverse pregnancy outcomes including iatrogenic preterm birth, placenta previa, preeclampsia, gestational diabetes mellitus, postpartum hemorrhage, and a protective factor for multiple gestation. Regarding neonatal outcomes, advanced maternal age was related to a decreased rate of low birthweight or an increased rate of hyperbilirubinemia depending on the adjustment for multiple gestation.
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- 2022
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45. Functional Genomics and Comparative Lineage-Specific Region Analyses Reveal Novel Insights into Race Divergence in Verticillium dahliae.
- Author
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Wang D, Zhang DD, Usami T, Liu L, Yang L, Huang JQ, Song J, Li R, Kong ZQ, Li JJ, Wang J, Klosterman SJ, Subbarao KV, Dai XF, and Chen JY
- Subjects
- Disease Resistance genetics, Genomics, Genotype, Host-Pathogen Interactions genetics, Plant Diseases microbiology, Soil Microbiology, Transcription, Genetic genetics, Virulence genetics, Ascomycota classification, Ascomycota genetics, Genome, Fungal genetics, Solanum lycopersicum microbiology
- Abstract
Verticillium dahliae is a widespread soilborne fungus that causes Verticillium wilt on numerous economically important plant species. In tomato, until now, three races have been characterized based on the response of differential cultivars to V. dahliae, but the genetic basis of race divergence in V. dahliae remains undetermined. To investigate the genetic basis of race divergence, we sequenced the genomes of two race 2 strains and four race 3 strains for comparative analyses with two known race 1 genomes. The genetic basis of race divergence was described by the pathogenicity-related genes among the three races, orthologue analyses, and genomic structural variations. Global comparative genomics showed that chromosomal rearrangements are not the only source of race divergence and that race 3 should be split into two genotypes based on orthologue clustering. Lineage-specific regions (LSRs), frequently observed between genomes of the three races, encode several predicted secreted proteins that potentially function as suppressors of immunity triggered by known effectors. These likely contribute to the virulence of the three races. Two genes in particular that can act as markers for race 2 and race 3 ( VdR2e and VdR3e , respectively) contribute to virulence on tomato, and the latter acts as an avirulence factor of race 3. We elucidated the genetic basis of race divergence through global comparative genomics and identified secreted proteins in LSRs that could potentially play critical roles in the differential virulence among the races in V. dahliae. IMPORTANCE Deciphering the gene-for-gene relationships during host-pathogen interactions is the basis of modern plant resistance breeding. In the Verticillium dahliae-tomato pathosystem, two races (races 1 and 2) and their corresponding avirulence ( Avr ) genes have been identified, but strains that lack these two Avr genes exist in nature. In this system, race 3 has been described, but the corresponding Avr gene has not been identified. We de novo -sequenced genomes of six strains and identified secreted proteins within the lineage-specific regions (LSRs) distributed among the genomes of the three races that could potentially function as manipulators of host immunity. One of the LSR genes, VdR3e , was confirmed as the Avr gene for race 3. The results indicate that differences in transcriptional regulation may contribute to race differentiation. This is the first study to describe these differences and elucidate roles of secreted proteins in LSRs that play roles in race differentiation.
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- 2021
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46. Rhizosphere Microbiomes of Potato Cultivated under Bacillus subtilis Treatment Influence the Quality of Potato Tubers.
- Author
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Song J, Kong ZQ, Zhang DD, Chen JY, Dai XF, and Li R
- Subjects
- Biodiversity, High-Throughput Nucleotide Sequencing methods, Microbiota, Plant Tubers genetics, Plant Tubers microbiology, Rhizosphere, Solanum tuberosum genetics, Solanum tuberosum microbiology, Bacillus subtilis physiology, Fungi physiology, Plant Tubers growth & development, Soil Microbiology standards, Solanum tuberosum growth & development
- Abstract
Plants serve as a niche for the growth and proliferation of a diversity of microorganisms. Soil microorganisms, which closely interact with plants, are increasingly being recognized as factors important to plant health. In this study, we explored the use of high-throughput DNA sequencing of the fungal ITS and bacterial 16S for characterization of the fungal and bacterial microbiomes following biocontrol treatment (DT) with Bacillus subtilis strain Bv17 relative to treatments without biocontrol (DC) during the potato growth cycle at three time points. A total of 5631 operational taxonomic units (OTUs) were identified from the 16S data, and 2236 OTUs were identified from the ITS data. The number of bacterial and fungal OTU in DT was higher than in DC and gradually increased during potato growth. In addition, indices such as Ace, Chao, Shannon, and Simpson were higher in DT than in DC, indicating greater richness and community diversity in soil following the biocontrol treatment. Additionally, the potato tuber yields improved without a measurable change in the bacterial communities following the B. subtilis strain Bv17 treatment. These results suggest that soil microbial communities in the rhizosphere are differentially affected by the biocontrol treatment while improving potato yield, providing a strong basis for biocontrol utilization in crop production.
- Published
- 2021
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47. Transcriptome Analysis of a Cotton Cultivar Provides Insights into the Differentially Expressed Genes Underlying Heightened Resistance to the Devastating Verticillium Wilt.
- Author
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Zhu H, Song J, Dhar N, Shan Y, Ma XY, Wang XL, Chen JY, Dai XF, Li R, and Wang ZS
- Subjects
- Gene Ontology, Host-Pathogen Interactions genetics, MAP Kinase Signaling System genetics, Phenotype, Plant Diseases genetics, RNA-Seq, Disease Resistance genetics, Gene Expression Profiling, Gene Expression Regulation, Plant, Gossypium genetics, Gossypium microbiology, Plant Diseases immunology, Plant Diseases microbiology, Verticillium physiology
- Abstract
Cotton is an important economic crop worldwide. Verticillium wilt (VW) caused by Verticillium dahliae ( V. dahliae ) is a serious disease in cotton, resulting in massive yield losses and decline of fiber quality. Breeding resistant cotton cultivars is an efficient but elaborate method to improve the resistance of cotton against V. dahliae infection. However, the functional mechanism of several excellent VW resistant cotton cultivars is poorly understood at present. In our current study, we carried out RNA-seq to discover the differentially expressed genes (DEGs) in the roots of susceptible cotton Gossypium hirsutum cultivar Junmian 1 (J1) and resistant cotton G. hirsutum cultivar Liaomian 38 (L38) upon Vd 991 inoculation at two time points compared with the mock inoculated control plants. The potential function of DEGs uniquely expressed in J1 and L38 was also analyzed by GO enrichment and KEGG pathway associations. Most DEGs were assigned to resistance-related functions. In addition, resistance gene analogues (RGAs) were identified and analyzed for their role in the heightened resistance of the L38 cultivar against the devastating Vd 991. In summary, we analyzed the regulatory network of genes in the resistant cotton cultivar L38 during V. dahliae infection, providing a novel and comprehensive insight into VW resistance in cotton.
- Published
- 2021
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48. Learning Curve from 100 Cases of Totally Thoracoscopic Mitral Valve Replacement.
- Author
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Fang GH, Chen JH, and Dai XF
- Subjects
- Adult, Female, Heart Valve Prosthesis Implantation methods, Humans, Male, Operative Time, Retrospective Studies, Education, Medical, Graduate methods, Heart Valve Diseases surgery, Heart Valve Prosthesis Implantation education, Learning Curve, Mitral Valve surgery, Surgeons education, Thoracic Surgery education, Thoracoscopy methods
- Abstract
Background: To investigate and analyze the learning curve of totally thoracoscopic mitral valve replacement and provide a quantitative reference for cardiac surgeons to carry out the operation step by step., Methods: The clinical data were retrospectively analyzed of 100 consecutive patients with totally thoracoscopic mitral valve replacement successively performed by the same surgeon in a single center from May 2019 to June 2020. The learning curve was divided into 2 stages by using cumulative sum analysis, and relevant surgical parameters and perioperative indicators were analyzed., Results: The first stage of the learning curve is the skill acquisition stage, which includes 1 to 40 surgical procedures. The second stage is the proficiency stage, involving 41 to 100 operations. Among the surgical parameters of the patients in the 2 stages, detectable improvements were observed in operative time, cardiopulmonary bypass time, cross-clamp time, and intraoperative injury. After surgery, the amount of drainage, length of hospital stay, blood creatinine levels, and oxygenation index 24 h after surgery were also significantly different between the 2 groups (all P < .05). The age and sex distributions of the patients were balanced, and there was no statistically significant difference in terms of conversion to median sternotomy between the 2 stages (P > .05)., Conclusions: Cumulative sum analysis was used to accurately analyze the learning curve of totally thoracoscopic mitral valve replacement, indicating that 40 cases are needed to master the technique.
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- 2021
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49. Cytotoxic function of xylanase VdXyn4 in the plant vascular wilt pathogen Verticillium dahliae.
- Author
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Wang D, Chen JY, Song J, Li JJ, Klosterman SJ, Li R, Kong ZQ, Subbarao KV, Dai XF, and Zhang DD
- Subjects
- Ascomycota enzymology, Ascomycota genetics, Ascomycota pathogenicity, Endo-1,4-beta Xylanases metabolism, Fungal Proteins metabolism, Ascomycota physiology, Endo-1,4-beta Xylanases genetics, Fungal Proteins genetics, Plant Diseases microbiology, Nicotiana microbiology
- Abstract
Phytopathogen xylanases play critical roles in pathogenesis, likely due to their ability to degrade plant structural barriers and manipulate host immunity. As an invader of plant xylem vessels, the fungus Verticillium dahliae is thought to deploy complex cell wall degrading enzymes. Comparative genomics analyses revealed that the V. dahliae genome encodes a family of six xylanases, each possessing a glycosyl hydrolase 11 domain, but the functions of these enzymes are undetermined. Characterizing gene deletion mutants revealed that only V. dahliae xylanase 4 (VdXyn4) degraded the plant cell wall and contributed to the virulence of V. dahliae. VdXyn4 displayed cytotoxic activity and induced a necrosis phenotype during the late stages of infection, leading to vein and petiole collapse that depended on the enzyme simultaneously localizing to nuclei and chloroplasts. The internalization of VdXyn4 was in conjunction with that of the plasma membrane complexLeucine-rich repeat (LRR)-receptor-like kinase suppressor of BIR1-1 (SOBIR1)/LRR-RLK BRI1-associated kinase-1 (BAK1), but we could not rule out the possibility that VdXyn4 may also act as an apoplastic effector. Immune signaling (in the SA-JA pathways) induced by VdXyn4 relative to that induced by known immunity effectors was substantially delayed. While cytotoxic activity could be partially suppressed by known effectors, they failed to impede necrosis in Nicotiana benthamiana. Thus, unlike typical effectors, cytotoxicity of VdXyn4 plays a crucial intracellular role at the late stages of V. dahliae infection and colonization, especially following pathogen entry into the xylem; this cytotoxic activity is likely conserved in the corresponding enzyme families in plant vascular pathogens., (© The Author(s) 2021. Published by Oxford University Press on behalf of American Society of Plant Biologists.)
- Published
- 2021
- Full Text
- View/download PDF
50. Genome Sequence Data of MAT1-1 and MAT1-2 Idiomorphs from Verticillium dahliae .
- Author
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Zhang YD, Zhang YY, Chen JY, Huang JQ, Zhang J, Liu L, Wang D, Zhao J, Song J, Li R, Yang L, Kong ZQ, Klosterman SJ, Subbarao KV, Dai XF, and Zhang DD
- Subjects
- Ascomycota, Genomics, Plant Diseases
- Abstract
Though Verticillium dahliae is an asexually reproducing fungus, it is considered heterothallic owing to the presence of only one of the two mating-type idiomorphs ( MAT1-1 or MAT1-2 ) in individual isolates. But sexual reproduction has never been observed either in nature or in the laboratory. All of the genomic information in the literature thus far has therefore come from studies on isolates carrying only the MAT1-2 idiomorph. Herein, we sequenced and compared high-quality reference genomes of MAT1-1 strain S011 and MAT1-2 strain S023 obtained from the same sunflower field. The two genomic sequences displayed high synteny, and encoded similar number genes, a similarity especially notable among pathogenicity-related genes. Homolog analysis between these two genomes revealed that 80% of encoded genes are highly conserved (95% identity and coverage), but only 20% of the single copy genes were identical. These novel genome resources will support the analysis of the structure and function of the two idiomorphs and provide valuable tools to elucidate the evolution and potential mechanisms of sexual reproduction in V. dahliae .
- Published
- 2021
- Full Text
- View/download PDF
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