275 results on '"Xu, Liqing"'
Search Results
252. Pyeloplasty for the treatment of ectopic renal hydronephrosis in adults: a case series of six patients.
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Han W, Li Z, Han G, Xu L, Li X, Fan S, Wang B, Huang C, Cui Y, Zhang Z, Zhou L, Yang K, and Li X
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Background: Ectopic renal hydronephrosis is a relatively rare condition, with literature primarily consisting of scattered case studies. The ectopic kidney poses technical challenges to surgeons due to its structural and anatomical abnormalities. This study aims to share our initial experiences with minimally invasive pyeloplasty as a management approach for ectopic renal hydronephrosis in adult patients., Case Description: Between August 2018 and January 2023, six patients underwent minimally invasive pyeloplasty for ectopic kidneys. The patient cohort consisted of four individuals with pelvic kidneys, one with an iliac kidney, and one with an abdominal kidney. Among these, three cases were left-sided, two were right-sided, and one was isolated. The median patient age was 27 (range, 18-45) years. Four patients underwent robot-assisted laparoscopic pyeloplasty, while two underwent laparoscopic pyeloplasty. The median operative time was 134 (range, 63-240) minutes. After a median follow-up duration of 28.5 (range, 6-59) months, two patients required nephrectomy, with vesicoureteral reflux (VUR) and malrotation potentially contributing to surgical failure in these cases. The remaining four patients showed either stable or improved hydronephrosis and renal function. The overall operative success rate was 66.7%., Conclusions: The rarity and anatomical variations of ectopic kidneys hinder the standardization of surgical approaches. The integration of three-dimensional (3D) virtual reconstruction and tailored surgical techniques contributes to enhanced outcomes in ectopic renal hydronephrosis cases. Furthermore, continued research and refinement of surgical approaches are needed., Competing Interests: Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at https://tau.amegroups.com/article/view/10.21037/tau-24-142/coif). The authors have no conflicts of interest to declare., (2024 AME Publishing Company. All rights reserved.)
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- 2024
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253. Clinical characteristics and outcomes of neonatal SARS-CoV-2 infection after the release of the epidemic situation of COVID-19.
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Xia S, Bei F, Cai C, Xu L, Gong X, Wang J, Zhang Y, Huang H, and Xia H
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- Humans, Infant, Newborn, Female, Male, China epidemiology, Retrospective Studies, SARS-CoV-2, Severity of Illness Index, COVID-19 epidemiology, COVID-19 diagnosis
- Abstract
Background: With the release of the coronavirus disease 2019 (COVID-19) pandemic in late 2022 in China, the number of people infected with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) roared, including neonatal cases. However, there were few studies on neonatal COVID-19, especially multi-center case reports. This study aimed to explore clinical characteristics and short-term outcomes of neonatal COVID-19 in China., Methods: We reviewed 187 cases of neonatal COVID-19 between December 11, 2022, and January 12, 2023. The diagnosis was assessed by symptoms, laboratory tests, X-ray manifestations, and diagnosis code. Clinical characteristics and outcomes were evaluated., Results: In 187 neonatal cases with COVID-19, 84 (44.9%) had severe SARS-CoV-2 infection. Most patients had confirmed exposure to SARS-CoV-2. Fever and respiratory symptoms were common (75.4% and 71.7%, respectively). Severe patients were more likely to have high alanine transaminase (ALT) (> 40U/L) (11.9% vs. 3.9%) and high N-terminal pro-brain natriuretic peptide (NT-proBNP) (> 2000pg/mL) (38.0% vs. 19.6%), compared with nonsevere ones (P < 0.05). None of the patients received COVID-19-specific medical interventions. A few severe patients received corticosteroids (1.1%), and immunoglobulin (0.5%), respectively. All patients were discharged home after the medical care with a median length of stay (LOS) of four days and none of them met the criteria of multisystem inflammatory syndrome in neonates (MIS-N)., Conclusions: After the release of the epidemic situation of COVID-19 in late 2022 in China, more neonatal cases with severe COVID-19 had high ALT and NT-proBNP level. Few specific medical interventions were given, and the outcome was satisfying., (© 2024. The Author(s).)
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- 2024
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254. Direct C3-H Alkylation and Alkenylation of Quinolines with Enones.
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Xu L, Wang X, Yang D, Yang X, and Wang D
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Conversion of quinoline C-H bonds to C-C bonds is essential for obtaining the enormous array of derivatives required for pharmaceutical and agrochemical development. Despite over a century of synthetic efforts, the direct alkylation and alkenylation at C3-H positions in a wide array of quinoline precursors remain predominantly challenging and elusive. This report outlines the first successful quinoline C3-H alkylation and alkenylation reactions, exhibiting exceptional regio- and stereoselectivity, all achieved under redox-neutral and transition-metal-free conditions. The method involves a three-step, one-pot or two-pot sequence, including 1,4-dearomative addition, functionalization at C3-, elimination or transalkylation to produce 3-alkylated /alkenylated quinolines. The presence of a carbonyl group in these products allows for further synthetic manipulations, enabling the production of cyanides, amides, amines, or simple alkyl derivatives., (© 2024 Wiley‐VCH GmbH.)
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- 2024
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255. Interstitials in Thermoelectrics.
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Xu L, Yin Z, Xiao Y, and Zhao LD
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Defect structure is pivotal in advancing thermoelectric performance with interstitials being widely recognized for their remarkable roles in optimizing both phonon and electron transport properties. Diverse interstitial atoms are identified in previous works according to their distinct roles and can be classified into rattling interstitial, decoupling interstitial, interlayer interstitial, dynamic interstitial, and liquid interstitial. Specifically, rattling interstitial can cause phonon resonance in cage compound to scatter phonon transport; decoupling interstitial can contribute to phonon blocking and electron transport due to their significantly different mean free paths; interlayer interstitial can facilitate out-of-layer electron transport in layered compounds; dynamic interstitial can tune temperature-dependent carrier density and optimize electrical transport properties at wide temperatures; liquid interstitial could improve the carrier mobility at homogeneous dispersion state. All of these interstitials have positive impact on thermoelectric performance by adjusting transport parameters. This perspective therefore intends to provide a thorough overview of advances in interstitial strategy and highlight their significance for optimizing thermoelectric parameters. Finally, the profound potential for extending interstitial strategy to various other thermoelectric systems is discussed and some future directions in thermoelectric material are also outlined., (© 2024 Wiley‐VCH GmbH.)
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- 2024
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256. Clinical, Prognosis, and Treatment Effect Features Analysis of Metachronous and Synchronous UTUC and BUC.
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Zuo W, Zhang J, Xu L, Xiong G, Xu C, Tang Q, Li X, and Zhou L
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Objective: To provide a comprehensive understanding of the clinical features of patients with synchronous and metachronous upper tract urothelial carcinoma (UTUC) and bladder urothelial carcinoma (BUC) and inform surgical and postoperative adjuvant treatment planning., Patients and Method: A total of 292 consecutive patients with synchronous and metachronous UTUC-BUC were retrospectively enrolled and were categorized into three groups: (1) UTUC metachronous BUC (N = 185, UTUC-mBUC), (2) BUC-metachronous UTUC (N = 43, BUC-mUTUC), (3) synchronous UTUC-BUC (N = 64, sUTUC-BUC). We compared pathological characteristics and survival data among groups with Wilcoxon's rank sum tests, Pearson's chi-squared, and the Kaplan-Meier method., Results: In the sUTUC-BUC group, a higher proportion of patients exhibited UTUC tumors with grade G3 (56%, P = .001) and stage T4 (6%, P < .001) than group UTUC-mBUC (G3 = 16%, T4 = 0%). The proportion of patients with variant histology subtype in group sUTUC-BUC was higher than that of metachronous UTUC-BUC, involving squamous (P = .003), adenoid (P = .012), and sarcomatoid (P < .001) differentiation. It was also observed that the maximum diameter of the UTUC tumor of group sUTUC-BUC (median = 3.5) was significantly larger than group UTUC-mBUC (median = 2.5, P = .002) and group BUC-mUTUC (median = 2.2, P < .001). Notably, sUTUC-BUC has an increased risk of cancer-specific death compared with UTUC-mBUC (P < .001) and BUC-mUTUC (P < .001). On multivariable Cox regression, synchronous UTUC-BUC was an independent predictor of both RFS (P < .001; vs. UTUC-mBUC: HR 0.555, P = .004; vs. BUC-mUTUC: HR 0.279, P < .001) and CSS (P < .001, HR 29.737). Moreover, sUTUC-BUC showed a better response to intravesical therapy and chemotherapy with higher cancer-specific survival (P < .001) and recurrence-free survival (P = .034)., Conclusions: The prognosis and pathological characteristics among different metachronous and synchronous UTUC and BUC were diverse. The synchronous UTUC-BUC group showed variant histology subtype, high-grade tumors, advanced tumors, multifocal UTUC, worse cancer-specific survival, but better response to intravesical therapy and chemotherapy., Competing Interests: Disclosure The authors have stated that they have no conflicts of interest., (Copyright © 2024. Published by Elsevier Inc.)
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- 2024
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257. An autologous duraplasty in situ technique in the treatment of Chiari malformation Type I: a prospective study.
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Xu L, Wu Y, Liao Z, Shen S, Xu F, Yi Z, Li L, Zhang J, and Duan H
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- Humans, Male, Female, Adult, Prospective Studies, Middle Aged, Treatment Outcome, Young Adult, Transplantation, Autologous methods, Adolescent, Neurosurgical Procedures methods, Magnetic Resonance Imaging, Arnold-Chiari Malformation surgery, Arnold-Chiari Malformation diagnostic imaging, Dura Mater surgery, Dura Mater diagnostic imaging
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Objective: Our study aims to prospectively compare an autologous duraplasty in situ technique (IS group) with the synthetic dural graft duraplasty (SDG group) to clarify the effectiveness and superiority of the former in the treatment of patients with Chiari malformation type 1 (CM-I)., Method: 29 patients with CM-I were randomly assigned to either IS or SDG group. In both groups, a dissection from the occipital bone was performed. All procedures were performed by the same surgeon. The two duraplasty methods were compared in terms of surgical factors and complications. Data analysis was done for the baseline material, the neurological outcome and MRI-documented syrinx size at the 6 month follow-up., Result: 29 patients were enrolled in this study, 14 in the IS group and 15 in the SDG group. The results showed no significant difference in operation time (P = 0.916), amount of bleeding (P = 0.120), operation complications, hospitalization time (P = 0.854) and prognosis between the two groups. The hospitalization cost of IS group was 15,125 yuan less than that of SDG group (P < 0.05)., Conclusion: The autogenous duraplasty in situ technique is a novel, simple, effective and economical surgical management for patients with CM-I., (© 2024. The Author(s) under exclusive licence to Belgian Neurological Society.)
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- 2024
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258. Preimplantation genetic testing for complex chromosomal rearrangements: clinical outcomes and potential risk factors.
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Liu D, Chen C, Huang Q, Dong Y, Xu L, Dong M, Zhu Z, Huang L, Wang F, Zhang L, Zhang X, and Liu F
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Objective: Complex chromosome rearrangements (CCR) are rare structural abnormalities involving at least three breakpoints, categorized into three types based on their structure: type A (three-way rearrangements), type B (double two-way translocations), and type C (exceptional CCR). However, thus far, limited data exists on preimplantation genetic testing for chromosomal structural rearrangements (PGT-SR) in CCR carriers. This study aims to evaluate the clinical outcomes and influencing factors of PGT-SR in couples with CCR., Methods: Fifteen couples with unique CCR recruited from 793 couples following PGT-SR between January 2017 and May 2023. In addition, a total of 54 CCR cases, 39 previously reported as well as 15 newly added, were included in the analysis of factors associate with normal/balanced embryos., Results: A total of 100 blastocysts were biopsied and analyzed in 15 CCR couples after 17 PGT-SR cycles, with 16.0% being euploid, 78.0% aneuploid and 6.0% mosaic. 11 normal/balanced embryos and one mosaic embryo were transferred, resulting in eight live births. Furthermore, based on the combined data from 54 CCR carriers, the proportion of normal/balanced embryos was 10.8%, with a significant decrease observed among female carriers compared to male heterozygotes (6.5% vs. 15.5%, p = 0.002). Type B exhibited the lowest rate of euploid embryos at only 6.7%, followed by type A at 11.6% and type C at 14.0%, although the differences were not significant ( p = 0.182). After completing the multivariate generalized estimating equation (GEE) analysis, type B ( p = 0.014) and female carrier ( p = 0.002) were identified as independent risk factors for fewer euploid embryos., Conclusion: The occurrence of balanced CCR in patients with reproductive abnormalities may be more frequent than we expected. Despite the proportion of normal/balanced embryos being significantly low, which can be influenced by CCR type and carrier's sex, PGT-SR may improve the reproductive outcomes among CCR cases. These findings can optimize the clinical management and genetic counseling of CCR carriers seeking assisted reproductive technology (ART)., 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 © 2024 Liu, Chen, Huang, Dong, Xu, Dong, Zhu, Huang, Wang, Zhang, Zhang and Liu.)
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- 2024
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259. Development of UHPLC-Q-Exactive Orbitrap/MS Technique for Determination of Proanthocyanidins (PAs) Monomer Composition Content in Persimmon.
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Zhao X, Ren D, Jin R, Chen W, Xu L, Guo D, Zhang Q, and Luo Z
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The main units of persimmon proanthocyanidins (PAs) are composed of flavan-3-ols including epigallocatechin gallate (EGCG) and gallocatechin gallate (GCG). Precise quantification of GCG is challenging due to its trace amounts in persimmon. In this study, to establish the optimal UHPLC-Q-Exactive Orbitrap/MS technique for the determination of PAs monomer composition in persimmon fruit flesh of different astringency types, mass spectrometry and chromatographic conditions were optimized. The results showed that when operating in negative ion mode, using a T3 chromatographic column (a type of C18 column with high-strength silica), acetonitrile as the organic phase, a 0.1% mobile phase acid content, and a mobile phase flow rate of 0.2 mL/min, the chromatographic peak shape and resolution of the PAs monomer composition improved. Additionally, there was no tailing phenomenon observed in the chromatographic peaks. At the same time, the intra-day and inter-day precision, stability, and recovery of the procedure were good. The relative standard deviation (RSD) of stability was less than 5%. The intra-day precision was in the range of 1.14% to 2.36%, and the inter-day precision ranged from 1.03% to 2.92%, both of which were less than 5%. The recovery rate ranged from 94.43% to 98.59% with an RSD less than 5%. The results showed that the UHPLC-Q-Exactive Orbitrap/MS technique established in this study can not only be used for the quantification of EGCG and GCG in persimmon fruit flesh but also be suitable for analyzing other PAs monomer compositions, providing robust support for the related research on persimmon PAs.
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- 2024
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260. Feasibility and safety of dual-console telesurgery with the KangDuo Surgical Robot-1500 System using fifth-generation and wired networks: an animal experiment and sea-spanning clinical study.
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Xu L, Shen C, Li X, Zhao F, Huang W, Yang K, Zhang P, DU Y, Fan S, Cui L, Zhou L, and Li X
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- Animals, Dogs, Male, Humans, Middle Aged, Equipment Design, Operative Time, Aged, Electromyography, Telemedicine methods, Robotic Surgical Procedures methods, Robotic Surgical Procedures adverse effects, Feasibility Studies, Prostatectomy methods, Prostatectomy adverse effects
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Background: To evaluate the feasibility and safety of dual-console telesurgery with the new KangDuo system in an animal experiment and clinical study., Methods: Six canine models were performed radical prostatectomy with dual-console KanDuo surgical robot-1500 (KD-SR-1500-RARP). The perioperative outcomes, physical and mental workload of the surgeon were collected. Physical workload was evaluated with surface electromyography. Mental workload was evaluated with NASA-TLX. After conducting animal experiments to verify safety of dual-console KD-SR-1500-RARP, we conducted the clinical trial using 5G and wired networks., Results: In the animal experiment, all surgeries were performed successfully. The operative time was 80.2±32.1 min. The docking time was 2.4±0.5 min. The console time was 49.7±25.3 min. There were no perioperative complications or equipment related adverse events. All dogs can micturate after catheter removal at one week postoperatively. The mental workload was at a low level (a scale ranging from 0 to 60), which scored 15.7±6.9. Among the eight recorded muscles, the fatigue degree of the right radial flexor and left biceps was the highest two (iEMG, resection, 299.8±344 uV, 109.9±16.9 uV; suture, 849.4±1252.5 uV, 423.1±621.3 uV, respectively). In the clinical study, the console time was 136 min. The mean latency time was ≤200 ms. The data pocket loss was <1%. The operation was successfully completed without malfunctions occurring throughout the entire process., Conclusions: Dual-console telesurgery with the KD-SR-1500 system was shown to be feasible and safe in radical prostatectomy using 5G and wired networks.
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- 2024
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261. Analysis of KangDuo-SR-1500 and KangDuo-SR-2000 robotic partial nephrectomy from an operative and ergonomic perspective: a prospective controlled study in porcine models.
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Xu L, Li X, Fan S, Li Z, Zuo W, Chen S, Zhang P, Cui L, Zhou L, Yang K, and Li X
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- Animals, Ergonomics, Nephrectomy, Prospective Studies, Swine, Treatment Outcome, Kidney Neoplasms surgery, Robotic Surgical Procedures methods, Robotics
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The objective of this study is to explore the safety and effectiveness of two new models of KangDuo surgical robots for partial nephrectomy in porcine models, and evaluate the ergonomic characteristics from both subjective and objective perspectives. Twelve porcine models were equally divided for KD-SR-1500 (three-arm) and KD-SR-2000 (four-arm). The perioperative outcomes, and physical and mental workload of the surgeon were compared. Physical workload was evaluated with surface electromyography. Mental workload was evaluated with NASA-TLX. All surgeries were performed successfully. There were no differences in perioperative variables (p > 0.05). There were no perioperative complications. The mental workload in both groups was at a low level. KD-SR-2000 showed advantages in physical workload (p < 0.01). KD-SR-1500 and KD-SR-2000 are technically feasible, valid, and safe for RAPN in porcine models. KD-SR-2000 had ergonomic advantages over KD-SR-1500., (© 2024. The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature.)
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- 2024
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262. Comparison of Cumulative Live Birth Rates Between Progestin and GnRH Analogues in Preimplantation Genetic Testing Cycles.
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Zhou R, Dong M, Huang L, Wang S, Wang Z, Xu L, Zhang X, and Liu F
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- Female, Humans, Pregnancy, Embryo Transfer, Fertilization in Vitro, Genetic Testing, Gonadotropin-Releasing Hormone, Live Birth epidemiology, Ovulation Induction, Pregnancy Rate, Retrospective Studies, Birth Rate, Progestins
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Context: Progestins have recently been used as an alternative for gonadotropin-releasing hormone (GnRH) analogues to prevent premature luteinizing hormone surge due to the application of vitrification technology. However, the long-term efficacy and safety of a progestin-primed ovarian stimulation (PPOS) regimen, including oocyte competence, cumulative live birth rate (LBR), and offspring outcomes, remain to be investigated., Objective: To compare cumulative LBR of preimplantation genetic testing (PGT) cycles between a PPOS regimen and GnRH analogues., Methods: This was a retrospective cohort study at a tertiary academic medical center. A total of 967 patients with good prognosis were categorized into 3 groups, of which 478 patients received a long GnRH agonist, 248 patients received a GnRH antagonist, and 250 received a PPOS regimen. Medroxyprogesterone 17-acetate was the only progestin used in the PPOS regimen. The primary outcome was cumulative LBR. Secondary outcomes included time to live birth, cumulative rates of biochemical and clinical pregnancy and pregnancy loss, and perinatal outcomes., Results: The PPOS regimen was negatively associated with cumulative LBR compared with GnRH antagonists and GnRH agonists (28.4% vs 40.7% and 42.7%). The average time to live birth was significantly shorter with GnRH antagonists than with the PPOS regimen. The cumulative biochemical and clinical pregnancy rates were also lower in the PPOS regimen than GnRH analogues, while cumulative pregnancy loss rates were similar across groups. Furthermore, the number and ratio of good-quality blastocysts were significantly reduced in the PPOS regimen compared with GnRH analogues. In addition, perinatal outcomes were comparable across 3 groups., Conclusion: A PPOS regimen may be adversely affect cumulative LBR and blastocyst quality in women with good prognosis compared with GnRH analogues in PGT cycles., (© The Author(s) 2023. Published by Oxford University Press on behalf of the Endocrine Society. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
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- 2023
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263. A heterozygous mutation in the ALPL gene in an adolescent with Chiari malformation type I accompanied by scoliosis, tethered cord and diastematomyelia.
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Xu L, Ma C, Shen S, Duan H, and Li X
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- Adolescent, Humans, Alkaline Phosphatase, Arnold-Chiari Malformation complications, Arnold-Chiari Malformation diagnostic imaging, Arnold-Chiari Malformation genetics, Neural Tube Defects complications, Neural Tube Defects diagnostic imaging, Neural Tube Defects genetics, Scoliosis complications, Scoliosis diagnostic imaging, Scoliosis genetics, Syringomyelia
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- 2023
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264. Anticoagulants in adult extracorporeal membrane oxygenation: alternatives to standardized anticoagulation with unfractionated heparin.
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Tang S, Xu L, Li H, Wu Z, and Wen Q
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- Humans, Adult, Heparin adverse effects, Anticoagulants adverse effects, Blood Coagulation, Hemorrhage chemically induced, Retrospective Studies, Extracorporeal Membrane Oxygenation, Thrombosis etiology
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Background: Extracorporeal membrane oxygenation (ECMO) is a vital technique for severe respiratory or heart failure patients. Bleeding and thrombotic events are common during ECMO and negatively impact patient outcomes. Unfractionated heparin is the primary anticoagulant, but its adverse effects limit its use, necessitating alternative anticoagulants., Objective: Review available alternative anticoagulants for adult ECMO patients. Explore potential novel anticoagulants for future ECMO use. Aim to reduce complications (bleeding and thrombosis) and improve safety and efficacy for critically ill ECMO patients., Methods: Comprehensive literature review of existing and emerging anticoagulants for ECMO., Results: Identified a range of alternative anticoagulants beyond unfractionated heparin. Evaluated their potential utility in mitigating ECMO-related complications., Conclusion: Diverse anticoagulant options are available and under investigation for ECMO. These alternatives may enhance patient safety and outcomes during ECMO support. Further research and clinical studies are warranted to determine their effectiveness and safety profiles., (© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
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- 2023
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265. Native circulating Brucella melitensis lineages causing a brucellosis epidemic in Qinghai, China.
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Xue H, Zhao Z, Wang J, Ma L, Li J, Yang X, Ren L, Xu L, Liu Z, and Li Z
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Since 2010, the cases and incidences of human brucellosis have been increasing annually in Qinghai (QH) Province. Molecular epidemiology and phylogenetic analyses of strains from this region are crucial to better understand the transmission of the disease and the evolutionary patterns of Brucella strains. In this study, classical bio-typing assay, multilocus variable-number tandem repeat analysis, and the whole-genome sequencing-single-nucleotide polymorphism approach were used to illustrate the epidemiological and evolutionary patterns of Brucella melitensis . A total of 54 B. melitensis bv. 3 strains were isolated and molecularly characterized, with all strains belonging to the East Mediterranean lineages. Cross-regional transmission events (i.e., between counties) were caused by common sources of infection, suggesting that predominant circulating genotypes are endemic in different regions. Strengthening surveillance in animal brucellosis and controlling infected animals' cross-border movement are necessary. Two strains isolated from humans and marmots were clustered in the same sub-clade, implying the possible existence of direct and/or indirect contact between sheep (and goats) and wildlife (marmots), but this needs to be verified by further investigations. The global-scale phylogenetic analysis indicated that 54 strains sorted into six subclades, four of which formed independent lineages, suggesting that the increase in the incidence rate of human brucellosis may be caused by local circulating lineages. Further strengthening the serology and pathogen surveillance of animals (wildlife) and humans will contribute to an in-depth understanding of the transmission chain of human brucellosis in this region., 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 Xue, Zhao, Wang, Ma, Li, Yang, Ren, Xu, Liu and Li.)
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- 2023
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266. A novel immunogenomic classification for prognosis in non-small cell lung cancer.
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Tang S, Xu L, Wu Z, Wen Q, Li H, and Li N
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- Humans, Reproducibility of Results, Prognosis, Immunotherapy, Tumor Microenvironment, Carcinoma, Non-Small-Cell Lung genetics, Lung Neoplasms genetics
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Objective: To facilitate immunotherapy and prognostic assessment of non-small cell lung cancer (NSCLC), we established a novel immunogenomic classification to provide valid identification criteria., Methods: The immune enrichment scores were calculated by single sample gene set enrichment analysis (ssGSEA) and clustered into Immunity_L and Immunity_H, and the reliability of this classification was demonstrated. Immune microenvironment score and immune cell infiltration analysis of NSCLC were also performed. Randomly divided into training group and test group, a prognosis-related immune profile was developed using least absolute shrinkage and selection operator (LASSO) and stepwise COX proportional hazards model to construct a prognostic mode., Results: The risk score for this immune profile was identified as an independent prognostic factor and can be used as a powerful prognostic tool to refine tumor immunotherapy. Our study identified two NSCLC classifications based on immunomic profiling, Immunity_H and Immunity_L., Conclusion: In conclusion, Immunogenomic classification can distinguish the immune status of different types of NSCLC patients and contribute to the immunotherapy of NSCLC patients., (© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
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- 2023
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267. Realization of thousand-second improved confinement plasma with Super I-mode in Tokamak EAST.
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Song Y, Zou X, Gong X, Becoulet A, Buttery R, Bonoli P, Hoang T, Maingi R, Qian J, Zhong X, Liu A, Li E, Ding R, Huang J, Zang Q, Liu H, Wang L, Zhang L, Li G, Sun Y, Garofalo A, Osborne T, Leonard T, Baek SG, Wallace G, Xu L, Zhang B, Wang S, Chu Y, Zhang T, Duan Y, Lian H, Zhang X, Jin Y, Zeng L, Lyu B, Xiao B, Huang Y, Wang Y, Shen B, Xiang N, Wu Y, Wu J, Wang X, Ding B, Li M, Zhang X, Qin C, Xi W, Zhang J, Huang L, Yao D, Hu Y, Zuo G, Yuan Q, Zhou Z, Wang M, Xu H, Xie Y, Wang Z, Chen J, Xu G, Hu J, Lu K, Liu F, Wu X, Wan B, and Li J
- Abstract
Mastering nuclear fusion, which is an abundant, safe, and environmentally competitive energy, is a great challenge for humanity. Tokamak represents one of the most promising paths toward controlled fusion. Obtaining a high-performance, steady-state, and long-pulse plasma regime remains a critical issue. Recently, a big breakthrough in steady-state operation was made on the Experimental Advanced Superconducting Tokamak (EAST). A steady-state plasma with a world-record pulse length of 1056 s was obtained, where the density and the divertor peak heat flux were well controlled, with no core impurity accumulation, and a new high-confinement and self-organizing regime (Super I-mode = I-mode + e-ITB) was discovered and demonstrated. These achievements contribute to the integration of fusion plasma technology and physics, which is essential to operate next-step devices.
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- 2023
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268. Dense dislocations enable high-performance PbSe thermoelectric at low-medium temperatures.
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Xu L, Xiao Y, Wang S, Cui B, Wu D, Ding X, and Zhao LD
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PbSe-based thermoelectric materials exhibit promising ZT values at medium temperature, but its near-room-temperature thermoelectric properties are overlooked, thus restricting its average ZT (ZT
ave ) value at low-medium temperatures. Here, a high ZTave of 0.90 at low temperature (300-573 K) is reported in n-type PbSe-based thermoelectric material (Pb1.02 Se0.72 Te0.20 S0.08 -0.3%Cu), resulting in a large ZTave of 0.96 at low-medium temperatures (300-773 K). This high thermoelectric performance stems from its ultralow lattice thermal conductivity caused by dense dislocations through heavy Te/S alloying and Cu interstitial doping. The dislocation density evaluated by modified Williamson-Hall method reaches up to 5.4 × 1016 m-2 in Pb1.02 Se0.72 Te0.20 S0.08 -0.3%Cu. Moreover, the microstructure observation further uncloses two kinds of dislocations, namely screw and edge dislocations, with several to hundreds of nanometers scale in length. These dislocations in lattice can strongly intensify phonon scattering to minimize the lattice thermal conductivity and simultaneously maintain high carrier transport. As a result, with the reduced lattice thermal conductivity and optimized power factor in Pb1.02 Se0.72 Te0.20 S0.08 -0.3%Cu, its near-room-temperature thermoelectric performance is largely enhanced and exceeds previous PbSe-based thermoelectric materials., (© 2022. The Author(s).)- Published
- 2022
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269. Adverse reaction signals mining and hemorrhagic signals comparison of ticagrelor and clopidogrel: A pharmacovigilance study based on FAERS.
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Tang S, Wu Z, Xu L, Wen Q, and Zhang X
- Abstract
Background: Ticagrelor and clopidogrel are commonly used antiplatelet agents, and we conducted a pharmacovigilance analysis using the Food and Drug Administration Adverse Event Reporting System (FAERS) to provide a reference for safe and reasonable clinical use. Methods: Data were collected in FAERS from 2012 Q1 to 2022 Q2 for data cleaning. We used system organ classes (SOCs) and prefer terms (PTs) from the Medical Dictionary of Regulatory Activity (MedDRA version 25.1). Adverse event reports were retrieved at the PT level. Adverse reaction (ADR) signals of ticagrelor and clopidogrel were mined by calculating reporting odds ratios (ROR), proportional reporting ratios (PRR), information component (IC) and empirical Bayesian geometric mean (EBGM). After that, further analysis of the hemorrhagic signals and their clinical information were performed. Results: The number of ADR reports where the primary suspect (PS) drugs were 15,133 for ticagrelor and 23,860 for clopidogrel. Significant ADR signals were identified by the SOC analysis for ticagrelor including cardiac disorders (ROR 4.87, PRR 4.46), respiratory disorders (ROR 2.45, PRR 2.28), and vascular disorders (ROR 2.22, PRR 2.16). Clopidogrel included blood disorders (ROR 2.86, PRR 2.77), vascular disorders (ROR 2.71, PRR 2.61), and cardiac disorders (ROR 2.29, PRR 2.22). At the PT level, the more frequent ADR signals for ticagrelor were dyspnoea, contusion, and haemorrhage, while clopidogrel were gastrointestinal haemorrhage, anaemia, and drug interaction. The hemorrhagic signals of both were mainly focused on the SOC level of gastrointestinal disorders, injury disorders and vascular disorders and nervous system disorders. The death and life-threatening rate of ticagrelor was 7.76 percentage higher than that of clopidogrel. Conclusion: Clinicians need to pay attention to not only common ADRs but also be alert to new ADR signals when choosing to use ticagrelor and clopidogrel. This study provides a reference for the reasonable and safe clinical use of ticagrelor and clopidogrel., 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 © 2022 Tang, Wu, Xu, Wen and Zhang.)
- Published
- 2022
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270. Mixed conifer-broadleaf trees on arbuscular mycorrhizal and ectomycorrhizal communities in rhizosphere soil of different plantation stands in the temperate zone, Northeast China.
- Author
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Zhang Y, Wang Q, Xu L, Ma S, Cui D, Zhu K, and Feng W
- Abstract
In comparison with ectomycorrhizal (EM) tree species, arbuscular mycorrhizal (AM) trees have different litter quality and nitrogen cycle modes, which may affect mycorrhizal colonization and the community composition and diversity. However, available studies addressing the mycorrhizal fungal colonization rate, diversity and community composition in mixed forest stands composed of AM and EM trees are rare. In the present study, we assessed litter quality, soil physicochemical properties and correlated them with mycorrhizal community characteristics in rhizosphere soils of monoculture and mixture plantation stands of AM tree species ( Fraxinus mandschurica Rupr.) and EM tree species ( Larix gmelinii Rupr., Picea koraiensis Nakai) in Northeast China. We hypothesized that (1) the effect of mixture pattern on mycorrhizal colonization rate and diversity would change with tree species, (2) the effect of mixture pattern on mycorrhizal community composition would be less pronounced in comparison with that of tree species. We found that mixture did not change AMF colonization rate regardless of mixture identity, whereas mixture and tree species exerted significant effects on EMF colonization rate. For AMF community, both M-AS ( Fraxinus mandschurica Rupr. and Picea koraiensis Nakai ) and M-AL ( Fraxinus mandschurica Rupr. and Larix gmelinii Rupr.) mixtures significantly increased Pielou index and Simpson index, whereas only M-AS significantly increased Sobs. For EMF community, mixture significantly affected examined diversity indices except for Chao1. Mixture significantly shifted AMF and EMF community, and the magnitude was tree species dependent. The dominant genera in AMF and EMF communities in plantation stands were Glomus and Tomentella , respectively. The EnvFit analysis showed that the determinant factors of EMF community are soil moisture, pH, nitrate nitrogen content, dissolved organic nitrogen content, soil organic matter content, soil organic carbon/total nitrogen and litter carbon/total nitrogen. In conclusion, mixed conifer-broadleaf trees significantly changed soil physicochemical properties, litter quality as well as mycorrhizal fungi community diversity and composition., 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 © 2022 Zhang, Wang, Xu, Ma, Cui, Zhu and Feng.)
- Published
- 2022
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271. Toxoplasma gondii ROP18 I inhibits host innate immunity through cGAS-STING signaling.
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Chen M, Yao L, Zhou L, Yang P, Zou W, Xu L, Li S, and Peng H
- Subjects
- Animals, COS Cells, Cell Line, Chlorocebus aethiops, HEK293 Cells, Humans, Interferon Regulatory Factor-3 immunology, Interferon Type I immunology, Interferon-gamma immunology, Intracellular Signaling Peptides and Proteins immunology, Mice, Phosphorylation immunology, RAW 264.7 Cells, Virulence Factors immunology, Immunity, Innate immunology, Membrane Proteins immunology, Nucleotidyltransferases immunology, Signal Transduction immunology, Toxoplasma immunology
- Abstract
Toxoplasma gondii is an opportunistic protozoan, which widely infects humans and other warm-blooded animals. The type I interferon (IFN) such as IFN-α/β is involved in cGAS-STING signaling to resist T. gondii infection. We found in RAW264.7 cells, that T. gondii virulence factor TgROP18
I , inhibited IFN-β production through interacting with interferon regulatory factor 3 (IRF3). Besides, TgROP18I interacted with p62 and Tumor Necrotic Factor Receptor Associated Factor 6 (TRAF6), which resulted in the inhibition of TRAF6-p62 interaction, and phosphorylation of p62. Furthermore, TgROP18I restricted the recruitment of ubiquitin, p62 and microtubule-associated protein light chain 3 (LC3) to the parasitophorous vacuole membrane (PVM) in IFN-γ-stimulated murine cell line L929 cells. In IFN-γ-stimulated human cells, TgROP18I restricted the decoration of PVM with ubiquitin, p62, and LC3, and bound with TRAF2, TRAF6, and p62, respectively. As a result, TgROP18I led to a successful parasitic replication in murine and human cells. Collectively, our study revealed the function of TgROP18I in suppressing host type I interferon responses in T. gondii infection for parasitic immune escape., (© 2022 The Authors. The FASEB Journal published by Wiley Periodicals LLC on behalf of Federation of American Societies for Experimental Biology.)- Published
- 2022
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272. Phase Change Energy Storage Elastic Fiber: A Simple Route to Personal Thermal Management.
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Li W, Xu L, Wang X, Zhu R, and Yan Y
- Abstract
A novel thermoplastic polyurethane (TPU) PCFs possessing a high loaded ratio and high elasticity was simply prepared by vacuum absorption following wet spinning, then coated by waterborne polyurethane (WPU). Octadecane (OCC), hexadecanol (HEO), and stearic acid (SA), which have different tendencies to form hydrogen bonds with TPU, were selected as PCMs, and their thermal behavior, thermal storge properties, and elasticity were systematically studied, respectively. The hierarchical pore structure though from the sheath to the core part of TPU filaments weakened the influence of the nonfreezing layer and hydrogen bond on the crystallization behavior of PCMs. The resulting HEO/TPU fiber has the highest enthalpy of 208.1 J/g compared with OCC and SA. Moreover, the HEO/TPU fiber has an elongation at break of 354.8% when the phase change enthalpy is as high as 177.8 J/g and the phase change enthalpy is still 174.5 J/g after fifty cycles. After ten tensile recovery cycles, the elastic recovery rate of HEO/TPU fiber was only 71.3%. When the HEO in the fiber was liquid state, the elastic recovery rate of HEO/TPU fiber promoted to 91.6%. This elastic PCFs have excellent thermal cycle stability, elastic recovery, and temperature sensitivity. It has great application potential in the fields of flexible wearable devices, intelligent fabrics, and temperature sensors.
- Published
- 2021
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273. 5-Hydroxymethylfurfural Enhances the Antiviral Immune Response in Macrophages through the Modulation of RIG-I-Mediated Interferon Production and the JAK/STAT Signaling Pathway.
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Zou H, Wu T, Wang Y, Kang Y, Shan Q, Xu L, Jiang Z, Lin X, Ye XY, Xie T, and Zhang H
- Abstract
5-Hydroxymethylfurfural (5-HMF) exists in a wide range of sugar-rich foods and traditional Chinese medicines. The role of 5-HMF in antiviral innate immunity and its mechanism have not been reported previously. In this study, we reveal for the first time that 5-HMF upregulates the production of retinoic acid-inducible gene I (RIG-I)-mediated type I interferon (IFN) as a response to viral infection. IFN-β and IFN-stimulated chemokine gene expressions induced by the vesicular stomatitis virus (VSV) are upregulated in RAW264.7 cells and primary peritoneal macrophages after treatment with 5-HMF, a natural product that appears to inhibit the efficiency of viral replication. Meanwhile, 5-HMF-pretreated mice show enhanced innate antiviral immunity, increased serum levels of IFN-β, and reduced morbidity and viral loads upon infection with VSV. Thus, 5-HMF can be seen to have a positive effect on enhancing type I IFN production. Mechanistically, 5-HMF upregulates the expression of RIG-I in macrophages, resulting in an acceleration of the RIG-I signaling pathway activation. Additionally, STAT1 and STAT2 phosphorylations, along with the expression of IFN-stimulated chemokine genes induced by IFN-α/β, were also enhanced in macrophages cotreated with 5-HMF. In summary, these findings indicate that 5-HMF not only can induce type I IFN production but also can enhance IFN-JAK/STAT signaling, leading to a novel immunomodulatory mechanism against viral infection. In conclusion, our study reveals a previously unrecognized effect of 5-HMF in the antiviral innate immune response and suggests new potential of utilizing 5-HMF for controlling viral infection., Competing Interests: The authors declare no competing financial interest., (© 2021 The Authors. Published by American Chemical Society.)
- Published
- 2021
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274. Toxoplasma gondii Type-I ROP18 Targeting Human E3 Ligase TRIM21 for Immune Escape.
- Author
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Yao L, Xu L, Zhou L, Wu S, Zou W, Chen M, Chen J, and Peng H
- Abstract
Toxoplasma gondii is an intracellular pathogen that exerts its virulence through inhibiting host's innate immune responses, which is mainly related to the type II interferon (IFN-γ) response. IFN-γ inducible tripartite motif 21 (TRIM21), an E3 ligase, plays an important role in anti-infection responses against the intracellular pathogens including bacteria, virus, and parasite. We found that T. gondii virulence factor ROP18 of the type I RH strain ( Tg ROP18
I ) interacted with human TRIM21, and promoted the latter's phosphorylation, which subsequently accelerated TRIM21 degradation through lysosomal pathway. Furthermore, TRIM21 protein level was found to be upregulated during RH and CEP strains of T. gondii infection. TRIM21 knocking down reduced the ubiquitin labeling on the parasitophorous vacuole membrane (PVM) [which led to parasitophorous vacuole (PV) acidification and death of CEP tachyzoites], and relieved the inhibition of CEP proliferation induced by IFN-γ in human foreskin fibroblast (HFF) cells which was consistent with the result of TRIM21 overexpression. On the other hand, TRIM21 overexpression enhanced the inhibition of CEP proliferation, and inhibited the binding of IκB-α with p65 to activate the IFN-γ-inducible NF-κB pathway, which might be resulted by TRIM21-IκB-α interaction. In brief, our research identified that in human cells, IFN-γ-inducible TRIM21 functioned in the innate immune responses against type III T. gondii infection; however, Tg ROP18I promoted TRIM21 phosphorylation, leading to TRIM21 degradation for immune escape in type I strain infection., 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 © 2021 Yao, Xu, Zhou, Wu, Zou, Chen, Chen and Peng.)- Published
- 2021
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275. Potent and selective inhibition of T-cell protein tyrosine phosphatase (TCPTP) by a dinuclear copper(II) complex.
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Yuan C, Zhu M, Wang Q, Lu L, Xing S, Fu X, Jiang Z, Zhang S, Li Z, Li Z, Zhu R, Ma L, and Xu L
- Subjects
- Animals, Apoptosis drug effects, Cell Line, Tumor, Cell Proliferation drug effects, Rats, Copper chemistry, Enzyme Inhibitors chemistry, Enzyme Inhibitors pharmacology, Organometallic Compounds chemistry, Organometallic Compounds pharmacology, Protein Tyrosine Phosphatase, Non-Receptor Type 2 antagonists & inhibitors
- Abstract
A dinuclear Cu(II) complex, [Cu(2)(μ-IDA)(phen)(3)(NO(3))]NO(3)·4H(2)O (phen = 1,10-phenanthroline, H(2)IDA = iminodiacetic acid), was found to potently and selectively inhibit T-cell protein tyrosine phosphatase, and lead to the anti-proliferation and apoptosis of C6 glioma cells.
- Published
- 2012
- Full Text
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