160 results on '"Yunzhi Liu"'
Search Results
2. Hepatocyte‐Targeted Lipid Nanoparticle Delivery of HERC2 Plasmid Controls Drug‐Induced Hepatotoxicity by Limiting β‐Catenin‐Regulated CYP2E1 Expression
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Yunzhi Liu, Qishan Xu, Yan Liu, Sihang Cao, Jialiang Luo, Zhuojun Zheng, Jia Zhou, Xiao Lu, Liyun Zhang, Yanan Tan, Qingyun Chen, and Daming Zuo
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CYP2E1 ,drug‐induced liver injury ,HERC2 ,lipid nanoparticle ,β‐catenin ,Science - Abstract
Abstract Understanding the molecular mechanisms that bridge hepatic inflammation and liver injury is crucial for developing effective therapeutic strategies for drug‐induced liver injury (DILI) management. HECT domain and RCC1‐like domain 2 (HERC2) belongs to the large Herc family of ubiquitin E3 ligases, which are implicated in tissue development and inflammation. The observation reveals a pronounced HERC2 expression in specific hepatocyte subsets that proliferate in response to DILI in humans, prompting an investigation into the role of HERC2 in distinct DILI progression. Under the APAP challenge, liver‐specific HERC2‐deficient mice suffer more severe liver damage. Integrated single‐cell RNA sequencing analysis unveils a negative correlation between HERC2 and CYP2E1, a vital metabolic enzyme for xenobiotics, in hepatocytes from APAP‐challenged mice. Mechanistically, HERC2 interacts with β‐catenin to promote its ubiquitination, thereby governing CYP2E1 transcriptional regulation. Targeted hepatic delivery of lipid nanoparticle‐encapsulated HERC2‐overexpressing plasmid markedly reduces liver damage caused by APAP overdose. Collectively, these findings elucidate a previously unrecognized protective role of HERC2 in protecting against acute liver injury associated with drug metabolism disorders, highlighting its potential as a therapeutic target in treating DILI.
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- 2024
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3. Mapping terrestrial mammals in China based on species richness of functional groups
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Yunzhi Liu, Jiechen Wang, Wenyu Dai, Zhenkang Wang, and Zhaoning Wu
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Spatial distribution ,Species richness ,Functional groups ,Functional diversity ,Terrestrial mammals ,Ecology ,QH540-549.5 - Abstract
Biodiversity loss is one of the most critical environmental issues globally. Functional diversity and functional groups, extending and expanding the concept of species richness, provide a more comprehensive understanding of biodiversity. By integrating mathematical indices calculation with classical geospatial statistical analysis and mapping techniques, we explored and visually illustrated the spatial patterns and regularities of functional diversity. This approach shed light on the functional diversity of China’s terrestrial mammals from a macroecological perspective. We found that in terms of overall quantity composition, underground-living mammals (UG groups) had the highest proportion (55.1%) in the vertical niche dimension, while nocturnal mammals (NO groups) dominated (58.6%) the in temporal niche dimension. Employing grid cells as fundamental units, in most grid cells, the proportion of UG and NO groups exceeded 50%, consistent with the overall quantity results. Examining the spatial distribution of functional group species richness from different perspectives reveals varying patterns. For instance, standard deviations of vertical and temporal niches showed different spatial clustering traits on either side of the Hu Huanyong Line. In a specific dimension of functional diversity, the numerical differences among functional groups are larger in grasslands with homogenous vegetation, while in forests with diverse vegetation types, these differences are minimized. Additionally, if there is a large disparity in species richness among functional groups in one dimension, there may be a smaller disparity in another. These findings offer a macroecological perspective for biodiversity research, providing insights for interdisciplinary studies in basic ecology, conservation biology, and geography, and offering scientific guidance for mammal conservation.
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- 2024
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4. Carbon monoxide is involved in melatonin-enhanced drought resistance in tomato seedlings by enhancing chlorophyll synthesis pathway
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Yunzhi Liu, Junrong Xu, Xuefang Lu, Mengxiao Huang, Yuanzhi Mao, Chuanghao Li, Wenjin Yu, and Changxia Li
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Carbon monoxide ,Melatonin ,Drought stress ,Chlorophyll synthesis ,Genes expression ,Botany ,QK1-989 - Abstract
Abstract Background Drought is thought to be a major abiotic stress that dramatically limits tomato growth and production. As signal molecule, melatonin (MT) and carbon monoxide (CO) can enhance plant stress resistance. However, the effect and underlying mechanism of CO involving MT-mediated drought resistance in seedling growth remains unknown. In this study, tomato (Solanum lycopersicum L. ‘Micro-Tom’) seedlings were used to investigate the interaction and mechanism of MT and CO in response to drought stress. Results The growth of tomato seedlings was inhibited significantly under drought stress. Exogenous MT or CO mitigated the drought-induced impairment in a dose-dependent manner, with the greatest efficiency provided by 100 and 500 µM, respectively. But application of hemoglobin (Hb, a CO scavenger) restrained the positive effects of MT on the growth of tomato seedlings under drought stress. MT and CO treatment promoted chlorophyll a (Chl a) and chlorophyll a (Chl b) accumulations. Under drought stress, the intermediate products of chlorophyll biosynthesis such as protoporphyrin IX (Proto IX), Mg-protoporphyrin IX (Mg-Proto IX), potochlorophyllide (Pchlide) and heme were increased by MT or CO, but uroporphyrinogen III (Uro III) content decreased in MT-treated or CO-treated tomato seedlings. Meanwhile, MT or CO up-regulated the expression of chlorophyll and heme synthetic-related genes SlUROD, SlPPOX, SlMGMT, SlFECH, SlPOR, SlChlS, and SlCAO. However, the effects of MT on chlorophyll biosynthesis were almost reversed by Hb. Conclusion The results suggested that MT and CO can alleviate drought stress and facilitate the synthesis of Chl and heme in tomato seedlings. CO played an essential role in MT-enhanced drought resistance via facilitating chlorophyll biosynthesis pathway.
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- 2024
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5. Interaction between ABA and NO in plants under abiotic stresses and its regulatory mechanisms
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Junrong Xu, Xuefang Lu, Yunzhi Liu, Weisen Lan, Zhien Wei, Wenjin Yu, and Changxia Li
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environmental stresses ,regulatory pathways ,metabolic pathways ,abscisic acid ,nitric oxide ,crosstalk ,Plant culture ,SB1-1110 - Abstract
Abscisic acid (ABA) and nitric oxide (NO), as unique signaling molecules, are involved in plant growth, developmental processes, and abiotic stresses. However, the interaction between ABA and NO under abiotic stresses has little been worked out at present. Therefore, this paper reviews the mechanisms of crosstalk between ABA and NO in the regulation of plants in response to environmental stresses. Firstly, ABA-NO interaction can alleviate the changes of plant morphological indexes damaged by abiotic stresses, for instance, root length, leaf area, and fresh weight. Secondly, regulatory mechanisms of interaction between ABA and NO are also summarized, such as reactive oxygen species (ROS), antioxidant enzymes, proline, flavonoids, polyamines (PAs), ascorbate-glutathione cycle, water balance, photosynthetic, stomatal movement, and post−translational modifications. Meanwhile, the relationships between ABA and NO are established. ABA regulates NO through ROS at the physiological level during the regulatory processes. At the molecular level, NO counteracts ABA through mediating post-translational modifications. Moreover, we also discuss key genes related to the antioxidant enzymes, PAs biosynthesis, ABA receptor, NO biosynthesis, and flavonoid biosynthesis that are regulated by the interaction between ABA and NO under environmental stresses. This review will provide new guiding directions for the mechanism of the crosstalk between ABA and NO to alleviate abiotic stresses.
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- 2024
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6. HERC2 promotes inflammation-driven cancer stemness and immune evasion in hepatocellular carcinoma by activating STAT3 pathway
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Yunzhi Liu, Qishan Xu, Fan Deng, Zhuojun Zheng, Jialiang Luo, Ping Wang, Jia Zhou, Xiao Lu, Liyun Zhang, Zhengliang Chen, Qifan Zhang, Qingyun Chen, and Daming Zuo
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HERC2 ,Hepatocellular carcinoma ,JAK2/STAT3 signaling ,Cancer stemness ,PD-L1 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Abstract Background Hepatic inflammation is a common initiator of liver diseases and considered as the primary driver of hepatocellular carcinoma (HCC). However, the precise mechanism of inflammation-induced HCC development and immune evasion remains elusive and requires extensive investigation. This study sought to identify the new target that is involved in inflammation-related liver tumorigenesis. Methods RNA-sequencing (RNA-seq) analysis was performed to identify the differential gene expression signature in primary human hepatocytes treated with or without inflammatory stimulus. A giant E3 ubiquitin protein ligase, HECT domain and RCC1-like domain 2 (HERC2), was identified in the analysis. Prognostic performance in the TCGA validation dataset was illustrated by Kaplan–Meier plot. The functional role of HERC2 in HCC progression was determined by knocking out and over-expressing HERC2 in various HCC cells. The precise molecular mechanism and signaling pathway networks associated with HERC2 in HCC stemness and immune evasion were determined by quantitative real-time PCR, immunofluorescence, western blot, and transcriptomic profiling analyses. To investigate the role of HERC2 in the etiology of HCC in vivo, we applied the chemical carcinogen diethylnitrosamine (DEN) to hepatocyte-specific HERC2-knockout mice. Additionally, the orthotopic transplantation mouse model of HCC was established to determine the effect of HERC2 during HCC development. Results We found that increased HERC2 expression was correlated with poor prognosis in HCC patients. HERC2 enhanced the stemness and PD-L1-mediated immune evasion of HCC cells, which is associated with the activation of signal transducer and activator of transcription 3 (STAT3) pathway during the inflammation-cancer transition. Mechanically, HERC2 coupled with the endoplasmic reticulum (ER)-resident protein tyrosine phosphatase 1B (PTP1B) and limited PTP1B translocation from ER to ER-plasma membrane junction, which ameliorated the inhibitory role of PTP1B in Janus kinase 2 (JAK2) phosphorylation. Furthermore, HERC2 knockout in hepatocytes limited hepatic PD-L1 expression and ameliorated HCC progression in DEN-induced mouse liver carcinogenesis. In contrast, HERC2 overexpression promoted tumor development and progression in the orthotopic transplantation HCC model. Conclusion Our data identified HERC2 functions as a previously unknown modulator of the JAK2/STAT3 pathway, thereby promoting inflammation-induced stemness and immune evasion in HCC.
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- 2023
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7. Mannose ameliorates experimental colitis by protecting intestinal barrier integrity
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Lijun Dong, Jingwen Xie, Youyi Wang, Honglian Jiang, Kai Chen, Dantong Li, Jing Wang, Yunzhi Liu, Jia He, Jia Zhou, Liyun Zhang, Xiao Lu, Xiaoming Zou, Xiang-Yang Wang, Qingqing Wang, Zhengliang Chen, and Daming Zuo
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Science - Abstract
New potential therapies for inflammatory bowel disease are needed as not all patients respond to or maintain a response to conventional therapies. Here the authors report that mannose supplementation ameliorates experimental colitis in male mice, potentially via effects on intestinal epithelium lysosomal integrity.
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- 2022
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8. Mannan-Binding Lectin Reduces Epithelial-Mesenchymal Transition in Pulmonary Fibrosis via Inactivating the Store-Operated Calcium Entry Machinery
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Yunzhi Liu, Xianghuan Xie, Ping Wang, Jialiang Luo, Yu Chen, Qishan Xu, Jia Zhou, Xiao Lu, Jianbo Zhao, Zhengliang Chen, and Daming Zuo
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idiopathic pulmonary fibrosis ,mannan-binding lectin ,epithelial-mesenchymal transition ,store-operated calcium entry ,pdk1 ,Medicine ,Internal medicine ,RC31-1245 - Abstract
Idiopathic pulmonary fibrosis (IPF) is a type of idiopathic interstitial pneumonia with a poor clinical prognosis. Increasing evidence has demonstrated that epithelial-mesenchymal transition (EMT) contributes to the production of pathogenic myofibroblasts and plays a pivotal role in the development of pulmonary fibrosis. Mannan-binding lectin (MBL) is a soluble calcium-dependent complement molecule. Several studies have reported associations between serum MBL levels and lung diseases; however, the effect of MBL on IPF remains unknown. The present study observed aggravated pulmonary fibrosis in bleomycin-treated MBL−/− mice compared with their wild-type counterparts. Lung tissues from bleomycin-treated MBL−/− mice displayed a more severe EMT phenotype. In vitro studies determined that MBL inhibited the EMT process through attenuating store-operated calcium entry (SOCE) signaling. It was further demonstrated that MBL promoted the ubiquitination of Orai1, an essential component of SOCE, via pyruvate dehydrogenase kinase 1 (PDK1)-serum glucocorticoid-regulated kinase 1 signaling. PDK1 inhibition abolished the MBL-mediated regulation of SOCE activity and the EMT process. Notably, biochemical analysis showed that MBL interacted with PDK1 and contributed to PDK1 ubiquitination. In summary, the present findings suggested that MBL limited the EMT phenotype in human alveolar epithelial cells through regulation of SOCE, and MBL could be recognized as a potential therapeutic target for IPF.
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- 2022
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9. High thermoelectric figure of merit of porous Si nanowires from 300 to 700 K
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Lin Yang, Daihong Huh, Rui Ning, Vi Rapp, Yuqiang Zeng, Yunzhi Liu, Sucheol Ju, Yi Tao, Yue Jiang, Jihyun Beak, Juyoung Leem, Sumanjeet Kaur, Heon Lee, Xiaolin Zheng, and Ravi S. Prasher
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Science - Abstract
Performance of Si nanowires as thermoelectrics are evaluated only from cryogenic to ambient temperatures and ZT has remained low. Here, the authors systematically optimized the synthesis method and improved the suspended microdevice platform to achieve high-performance thermoelectrics up to 700 K.
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- 2021
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10. Strigolactone-Mediated Trehalose Enhances Salt Resistance in Tomato Seedlings
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Xuefang Lu, Xiaojun Liu, Junrong Xu, Yunzhi Liu, Yuzhen Chi, Wenjin Yu, and Changxia Li
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strigolactone ,trehalose ,salt ,regulator pathway ,genes expression ,Plant culture ,SB1-1110 - Abstract
Strigolactones (SLs) are newly discovered plant hormones that modulate a variety of physiological and biochemical processes and plant stress responses. In this study, SLs’ synthetic analog, GR24, significantly improved the growth of tomato seedlings under salt stress, while SLs’ synthesis inhibitor, TIS108, inversed the positive role of SLs, indicating that SLs could effectively enhance salt-stress resistance in tomato. To further explore the mechanism of SL-modulated trehalose (Tre) in response to salt stress, Tre metabolism was analyzed during this process. GR24 increased the endogenous Tre and starch contents and decreased the glucose (Glu) level under salt-stress conditions. Additionally, the TPS and TPP activities were enhanced by GR24 and the activity of THL was inhibited by GR24 under salt stress; thereafter, Tre biosynthesis-related genes, including TPS1, TPS2, TPP1, and TPP2, were also upregulated by GR24 under salt stress. However, the function of GR24 in Tre metabolism was inhibited by TIS108. Thus, the results indicated that GR24 improved the expression levels or activities of Tre biosynthesis-related genes or enzymes and inhibited the transcript level or activity of genes or enzymes related to Tre degradation, respectively, resulting in an increase in the endogenous Tre level and, therefore, weakening the salt toxicity of tomato seedlings.
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- 2023
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11. Representation of gas hydrate fracture migration system by seismic
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Ruiyou SONG, Kui CHEN, Anqi LI, Huan MAO, and Yunzhi LIU
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gas hydrate ,migration system ,fracture identification technique ,diapir ,qiongdongnan basin ,Geophysics. Cosmic physics ,QC801-809 ,Geology ,QE1-996.5 - Abstract
The South China Sea is one of the four major offshore oil and gas accumulation centers in the world. Many oil and gas fields and hydrate deposits have been found on the northern slope of the South China Sea. The amount of hydrate resources is huge. Relying on high-precision seismic exploration technology, the exploration of hydrate deposits in the South China Sea has progressed greatly in recent years, but the success rate of seismic detection technology needs to be improved. Scientific drillings have proved that there are multiple solutions to find hydrate only by identifying BSR in the stable zone, while the research on hydrate accumulation system is not deep enough, especially the migration, accumulation and dispersion system. Fractures are the main systems of hydrate accumulation and mineralization in the north of the South China Sea. In order to effectively characterize the fracture system of hydrate, this paper, combined with the successful experience of oil and gas reservoir migration and accumulation system research, applied the fracture identification technology used to study fracture channels to discover the diapir gas field to the BSR area of Qiongdongnan Basin, and successfully identified the hydrate fracture transport system. Based on the results, the migration efficiency was discussed. In the study of gas hydrate accumulation systems, the seismic characterization of fractures can be used as a means to study the transport system.
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- 2021
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12. Strigolactone Alleviates the Adverse Effects of Salt Stress on Seed Germination in Cucumber by Enhancing Antioxidant Capacity
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Changxia Li, Xuefang Lu, Yunzhi Liu, Junrong Xu, and Wenjin Yu
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GR24 ,TIS108 ,alleviation ,antioxidant system ,gene expression ,Therapeutics. Pharmacology ,RM1-950 - Abstract
Strigolactones (SLs), as a new phytohormone, regulate various physiological and biochemical processes, and a number of stress responses, in plants. In this study, cucumber ‘Xinchun NO. 4’ is used to study the roles of SLs in seed germination under salt stress. The results show that the seed germination significantly decreases with the increase in the NaCl concentrations (0, 1, 10, 50, and 100 mM), and 50 mM NaCl as a moderate stress is used for further analysis. The different concentrations of SLs synthetic analogs GR24 (1, 5, 10, and 20 μM) significantly promote cucumber seed germination under NaCl stress, with a maximal biological response at 10 μM. An inhibitor of strigolactone (SL) synthesis TIS108 suppresses the positive roles of GR24 in cucumber seed germination under salt stress, suggesting that SL can alleviate the inhibition of seed germination caused by salt stress. To explore the regulatory mechanism of SL-alleviated salt stress, some contents, activities, and genes related to the antioxidant system are measured. The malondialdehyde (MDA), H2O2, O2−, and proline contents are increased, and the levels of ascorbic acid (AsA) and glutathione (GSH) are decreased under salt stress conditions, while GR24 treatment reduces MDA, H2O2, O2−, and proline contents, and increases AsA and GSH contents during seed germination under salt stress. Meanwhile, GR24 treatment enhances the decrease in the activities of antioxidant enzymes caused by salt stress [superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) and ascorbate peroxidase (APX)], following which antioxidant-related genes SOD, POD, CAT, APX, and GRX2 are up-regulated by GR24 under salt stress. However, TIS108 reversed the positive effects of GR24 on cucumber seed germination under salt stress. Together, the results of this study revealed that GR24 regulates the expression levels of genes related to antioxidants and, therefore, regulates enzymatic activity and non-enzymatic substances and enhances antioxidant capacity, alleviating salt toxicity during seed germination in cucumber.
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- 2023
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13. Regional sustainable development strategy based on the coordination between ecology and economy: A case study of Sichuan Province, China
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Yunzhi Liu, Rongjin Yang, Meiying Sun, Le Zhang, Xiuhong Li, Lingyu Meng, Yizhuo Wang, and Qiang Liu
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Ecological quality ,Economic growth ,Partition ,Coupling coordination degree ,Sichuan province ,Ecology ,QH540-549.5 - Abstract
The coordinated development of ecology and economy is one of the key issues of sustainable development. A full understanding of the relationship between ecology and economy is necessary for the coordinated development of the two. This paper takes Sichuan Province as the research area and county-level administrative districts as the research unit. Based on the medium value of the ecological quality index and economic growth index of each unit, Sichuan Province is divided into dual pressure zones (DPZ), economic backward zones (EBZ), ecological crisis zones (ECZ), and coordinated development zones (CDZ) and the coupling coordination degree (CCD) of each unit is studied. The results show that: (1) On the whole, the eastern part of Sichuan Province has a better level of economic development, and the southern part of the western region has a higher ecological quality. The ecological quality and economic growth pattern are highly correlated with topographical conditions. (2) The distribution characteristics of the four types of partitions are significantly different. The EBZ are more distributed in the western and southern of Sichuan Province, the ECZ are more distributed in the eastern, the DPZ and CDZ are relatively more sporadic. More than 90% of the partition changed zones are distributed in the eastern area. (3) The CCD of more than 95% units belongs to moderate coordination and high coordination. The overall CCD of the four types of zones has shown an upward trend from 2010 to 2015. Based on the results, Sichuan Province should follow the path of clear waters and green mountains are as good as mountains of gold and silver, and targeted sustainable development suggestions for DPZ, EBZ, ECZ, and CDZ are put forward. This paper provides guidance for formulating regional sustainable development strategies, especially in areas with unbalanced development due to congenital topographical conditions.
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- 2022
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14. Molecular Characterization of HN1304M, a Cat Que Virus Isolated from Midges in China
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Ziqian Xu, Lei Cao, Liang Cai, Shihong Fu, Kai Nie, Qikai Yin, Yuxi Cao, Guoping Liu, Yunzhi Liu, Hong Zhang, Lidong Gao, Ying He, Huanyu Wang, and Guodong Liang
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orthobunyavirus ,Manzanilla species complex ,Cat Que virus ,Culicoides ,arbovirus ,Medicine - Abstract
The Cat Que orthobunyavirus has been found in mosquitoes, birds, pigs, and humans, suggesting its wide range of hosts and potential public health implications. During arbovirus surveillance in 2013, the HN1304M virus was isolated from naturally occurring Culicoides biting midges in Hunan Province, southern China. The virus was cytopathic to BHK-21 cells and showed stable passage, but was not cytopathic to C6/36 cells. Determination and analysis of the viral genome sequence revealed that HN1304M is an RNA virus with three gene segments, namely, L, M, and S. The nucleotide and amino acid sequence homologies of HN1304M to Cat Que viruses in the Manzanilla species complex were 90.3–99.4%, and 95–100%, respectively, while the homologies to other viruses in this species complex were 74–86.6% and 78.1–96.1%, respectively. A phylogenetic analysis of the viral genes revealed that HN1304M formed an evolutionary branch with other Cat Que viruses isolated from mosquitoes, pigs, birds, and humans, which was completely independent of the other viruses in this complex. The fact that the Cat Que virus was isolated from Culicoides suggests that biting midges may participate in the natural circulation of Cat Que viruses.
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- 2022
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15. Mannan-Binding Lectin Attenuates Inflammatory Arthritis Through the Suppression of Osteoclastogenesis
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Lijun Dong, Jun Wu, Kai Chen, Jingwen Xie, Youyi Wang, Dantong Li, Yunzhi Liu, Aiping Yin, Yue Zhao, Yunpeng Han, Jia Zhou, Liyun Zhang, Zhengliang Chen, and Daming Zuo
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mannan-binding lectin ,arthritis ,osteoclastogenesis ,receptor activator of nuclear factor-κB ligand ,p38 ,Immunologic diseases. Allergy ,RC581-607 - Abstract
Mannan-binding lectin (MBL) is a vital element in the host innate immune system, which is primarily produced by the liver and secreted into the circulation. Low serum level of MBL is reported to be associated with an increased risk of arthritis. However, the underlying mechanism by which MBL contributes to the pathogenesis of arthritis is poorly understood. In this study, we investigated the precise role of MBL on the course of experimental murine adjuvant-induced arthritis (AIA). MBL-deficient (MBL−/−) AIA mice showed significantly increased inflammatory responses compared with wild-type C57BL/6 AIA mice, including exacerbated cartilage damage, enhanced histopathological features and high level of tartrate-resistant acid phosphatase (TRAP)-positive cells. MBL protein markedly inhibited the osteoclast formation from human blood monocytes induced by receptor activator of nuclear factor-κB ligand (RANKL) and macrophage colony-stimulating factor (M-CSF) in vitro. Mechanistic studies established that MBL inhibited osteoclast differentiation via down-regulation of p38 signaling pathway and subsequent nuclear translocation of c-fos as well as activation of nuclear factor of activated T-cells c1 (NFATc1) pathway. Importantly, we have provided the evidence that concentrations of MBL correlated negatively with the serum levels of amino-terminal propeptide of type I procollagen (PINP) and C-terminal telopeptide of type I collagen (β-CTX), serum markers of bone turnover, in patients with arthritis. Our study revealed an unexpected function of MBL in osteoclastogenesis, thus providing new insight into inflammatory arthritis and other bone-related diseases in patients with MBL deficiency.
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- 2019
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16. Mannan-binding lectin suppresses growth of hepatocellular carcinoma by regulating hepatic stellate cell activation via the ERK/COX-2/PGE2 pathway
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Junru Li, Huifang Li, Yu Yu, Yan Liu, Yunzhi Liu, Qiang Ma, Liyun Zhang, Xiao Lu, Xiang-yang Wang, Zhengliang Chen, Daming Zuo, and Jia Zhou
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mannan binding lectin ,hepatocellular carcinoma ,hepatic stellate cells ,erk/cox-2/pge2 pathway ,Immunologic diseases. Allergy ,RC581-607 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Mannan binding lectin (MBL), initially known to activate the complement lectin pathway and defend against infection, was recently shown to be potentially involved in the development of several types of cancer; however, its exact role in cancers, especially its effect on tumor microenvironment remain largely unknown. Here, using a murine hepatocellular carcinoma (HCC) model, we showed that MBL was a component of liver microenvironment and MBL-deficient (MBL–/–) mice exhibited an enhanced tumor growth compared with wild-type (WT) mice. This phenomenon was associated with elevation of myeloid derived suppressed cells (MDSCs) in tumor tissue of MBL–/– mice. MBL deficiency also resulted in an increase of activated hepatic stellate cells (HSCs), which showed enhanced cyclooxygenase-2 (COX-2) expression and prostaglandin E2 (PGE2) production. Pharmacological inhibition of COX-2 in vivo partially abrogated the MBL deficiency-promoted tumor growth and MDSC accumulation. Mechanistic studies revealed that MBL could interact directly with HSCs and inhibit HCC-induced HSCs activation via downregulating the extracellular signal-regulated kinase (ERK)/COX-2/PGE2 signaling pathway. Furthermore, MBL-mediated suppression of HCC is validated by administration of MBL-expressing, liver-specific adeno-associated virus (AAV), which significantly inhibited HCC progression in MBL–/– mice. Taken together, these data reveal that MBL may impact on tumor development by shaping the tumor microenvironment via its interaction with the local stromal cells, and also suggests its potential therapeutic use for the treatment of HCC.
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- 2019
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17. Do Narcissists Enjoy Visiting Social Networking Sites? It Depends on How Adaptive They Are
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Yuanyuan Shi, Yu L. L. Luo, Ziyan Yang, Yunzhi Liu, and Hanwushuang Bao
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narcissism ,social networking sites (SNS) ,affective experience ,emotion ,self-esteem ,Psychology ,BF1-990 - Abstract
Previous evidence suggests that narcissistic people tend to visit social networking sites (SNS) frequently, but the emotions accompanying their engagement on such sites has not been a significant subject of study. Therefore, we examined the relationship between narcissism and the affective experience on SNS in two different samples. To do so, we not only examined narcissism as a whole but also distinguished between adaptive and maladaptive narcissism. Results of the two studies consistently showed that: (1) narcissism as a whole was not correlated with the SNS affective experience; (2) maladaptive narcissism was predictive of a worse affective experience on SNS; and (3) partly due to a positive correlation with self-esteem, adaptive narcissism was associated with a better SNS affective experience. In addition, these findings held with SNS activities considered in simultaneity. The present research extends our understanding of the relationship between narcissism and social networking as well as that between emotion and social networking.
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- 2018
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18. Increasing Need for Uniqueness in Contemporary China: Empirical Evidence
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Huajian Cai, Xi Zou, Yi Feng, Yunzhi Liu, and Yiming Jing
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need for uniqueness ,China ,cultural change ,individualism-collectivism ,social change ,Psychology ,BF1-990 - Abstract
Past research has documented various cultural and psychological changes in contemporary China. In two studies, we examine how Chinese people’s need for uniqueness (NFU) also has changed. In Study 1, we found a significant cross-generational increase in Chinese participants’ self-reported NFU. In Study 2, we sampled the names of Chinese newborn babies over the last five decades and found that parents have been increasingly likely to use unique characters to name their children. These findings suggest that the NFU has been rising in China, a historically collectivistic-oriented society. Theoretical and practical implications of our findings were discussed.
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- 2018
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19. Adsorption of aquatic Cd using a combination of bacteria and modified carbon fiber
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Chao Xue, Peishi Qi, and Yunzhi Liu
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Physical and theoretical chemistry ,QD450-801 - Abstract
Batch experiments were conducted to investigate the capacity and mechanisms for adsorbing Cd 2+ from aqueous solutions by the composite material. The composite material was manufactured with Plesiomonas shigelloides strain H5 and modified polyacrylonitrile-based carbon fiber. Experimental results showed that the surface areas of modified polyacrylonitrile-based carbon fiber increased by 58.54% and pore width increased by 40.19% compared with unmodified polyacrylonitrile-based carbon fiber. Boehm’s titration results show the surface acid sites of composite material were increased by 712% compared with unmodified polyacrylonitrile-based carbon fiber. The field emission scanning electron microscope results show P. shigelloides H5 can be grown on the surface of modified polyacrylonitrile-based carbon fiber closely. The equilibrium removal rate and sorption quantity of composite material were 71.56% and 7.126 mg g −1 , respectively. With the pH value of aqueous solution increased, the removal rate of Cd 2+ ions was also increased, but the change of temperature and ionic strength had no significant effect on the removal rate. Furthermore, the results showed the whole sorption process was a good fit to Lagergren pseudo-second-order model and Freundlich isotherms model. Therefore, the results infer that there was a heterogeneous distribution of active sites, and then the sorption process was chemical adsorption and multilayer adsorption. In a word, microbial composite carbon fiber material can adsorb Cd 2+ ions from aqueous solution effectively, which might be helpful in wastewater treatment in the future.
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- 2018
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20. Isolation and characteristic analysis of a novel strain H7N9 of avian influenza virus A from a patient with influenza-like symptoms in China
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Faming Chen, Junhua Li, Biancheng Sun, Hong Zhang, Rusheng Zhang, Jie Yuan, Xinhua Ou, Wen Ye, Jingfang Chen, Yunzhi Liu, and Yiwei Huang
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Avian influenza virus ,Genetic analysis ,H7N9 ,Influenza surveillance ,Mutations ,Infectious and parasitic diseases ,RC109-216 - Abstract
A novel H7N9 virus (A/Changsha/1/2013(H7N9)) identified through routine examination in the influenza network laboratory was analyzed retrospectively. The gene sequences of A/Changsha/1/2013(H7N9) were highly homologous to other viruses isolated in mainland China. Mutations of Q226L and G186 V were found in the hemagglutinin protein (HA). Amino acid deletions were found at positions 69–73 of the neuraminidase protein (NA) and 218–230 of the non-structural protein (NS1). All viral genes except PB1 were essentially identical to the sequences of other Chinese influenza A H7N9 isolates. Overall, A/Changsha/1/2013(H7N9) is highly homologous to other H7N9 avian influenza viruses isolated in mainland China.
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- 2015
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21. Investigation of avian influenza infections in wild birds, poultry and humans in Eastern Dongting Lake, China.
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Jinghong Shi, Lidong Gao, Yun Zhu, Tao Chen, Yunzhi Liu, Libo Dong, Fuqiang Liu, Hao Yang, Yahui Cai, Mingdong Yu, Yi Yao, Cuilin Xu, Xiangming Xiao, and Yuelong Shu
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Medicine ,Science - Abstract
We investigated avian influenza infections in wild birds, poultry, and humans at Eastern Dongting Lake, China. We analyzed 6,621 environmental samples, including fresh fecal and water samples, from wild birds and domestic ducks that were collected from the Eastern Dongting Lake area from November 2011 to April 2012. We also conducted two cross-sectional serological studies in November 2011 and April 2012, with 1,050 serum samples collected from people exposed to wild birds and/or domestic ducks. Environmental samples were tested for the presence of avian influenza virus (AIV) using quantitative PCR assays and virus isolation techniques. Hemagglutination inhibition assays were used to detect antibodies against AIV H5N1, and microneutralization assays were used to confirm these results. Among the environmental samples from wild birds and domestic ducks, AIV prevalence was 5.19 and 5.32%, respectively. We isolated 39 and 5 AIVs from the fecal samples of wild birds and domestic ducks, respectively. Our analysis indicated 12 subtypes of AIV were present, suggesting that wild birds in the Eastern Dongting Lake area carried a diverse array of AIVs with low pathogenicity. We were unable to detect any antibodies against AIV H5N1 in humans, suggesting that human infection with H5N1 was rare in this region.
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- 2014
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22. Association of survivin polymorphisms with tumor susceptibility: a meta-analysis.
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Ying Zhu, Yongguo Li, Shisheng Zhu, Renkuan Tang, Yunzhi Liu, and Jianbo Li
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Medicine ,Science - Abstract
BACKGROUND: The survivin polymorphisms have been shown to confer genetic susceptibility to various tumors, but the results are inconsistent. In order to accomplish a more precise estimation of the relationship, a meta-analysis was performed. RESULTS: For rs9904341, a significantly increased tumor risk was found in overall meta-analysis under C/C vs. G/G (OR = 1.40, 95% CI = 1.13-1.74, p = 0.002), dominant (OR = 1.18, 95% CI = 1.01-1.38, p = 0.039) and recessive (OR = 1.34, 95% CI = 1.13-1.58, p = 0.001) genetic models and Asians group. In subgroup analyses of tumor types, we found a significant association between this SNP and an increased risk of gastric, colorectal, bladder and other tumors as well as a decreased risk of hepatocellular cancer. For rs17878467, a significantly decreased tumor risk was identified in overall meta-analysis for allele contrast (T vs. C: OR = 0.69, 95% CI = 0.51-0.92, p = 0.012), C/T vs. C/C (OR = 0.61, 95% CI = 0.42-0.88, p = 0.009) and dominant (OR = 0.62, 95% CI = 0.43-0.88, p = 0.007) genetic models and Asians group. For rs2071214, we found a significant association between this SNP and an increased tumor risk in overall meta-analysis under G/G vs. A/A (OR = 1.51, 95% CI = 1.04-2.18, p = 0.029) and recessive (OR = 1.54, 95% CI = 1.07-2.22, p = 0.020) genetic models and Asians group. Besides, there was a significant association of rs8073069 with an increased tumor risk under recessive genetic model (OR = 1.37, 95% CI = 1.01-1.84, p = 0.040), while no significant association between rs1042489 and tumor risk was detected. CONCLUSIONS: The survivin rs9904341 most likely contributed to increased susceptibility to tumor in Asians as well as to gastric, colorectal and bladder cancers. As for rs17878467, the T allele might be a protective factor for tumor, especially in Asians. Moreover, the survivin rs8073069 and rs2071214 seemed to be associated with an increased tumor risk in Asians, while there was no association between the survivin rs1042489 and tumor risk.
- Published
- 2013
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23. A study of engine room smoke detection based on proactive machine vision model for intelligent ship.
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Peng Zhang, Zhimin Song, Chaozhe Li, Yunzhi Liu, Yongjiu Zou, Yuewen Zhang, and Peiting Sun
- Published
- 2024
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24. Pricing and Collection Rate Decisions and Reverse Channel Choice in a Socially Responsible Supply Chain With Green Consumers.
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Yunzhi Liu and Tiaojun Xiao
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- 2020
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25. Product service model constructing method for intelligent home based on positive creative design thinking.
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Weiwei Wang, Yunzhi Liu, Ting Wei, and Yunyan Zhang
- Published
- 2020
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26. Introduction of seven nitro groups on the 2-azaadamantane scaffold via a two-shell arrangement strategy
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Qi Zhou, Rongbin Cai, Huan Li, Yunzhi Liu, Bing Li, Tianjiao Hou, Long Zhu, Guixiang Wang, Yu Zhang, and Jun Luo
- Subjects
Organic Chemistry - Abstract
2,9,9,10,10-Pentanitro-2-azaadamantane-4,8-diyl dinitrate, the first member of the heptanitroazaadamantane family, was synthesized by a two-shell arrangement strategy for nitro group introduction.
- Published
- 2023
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27. ortho-C(sp3)–H arylation of aromatic aldehydes using 2-amino-N-methyl-acetamide as a L,L-type transient directing group
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Jinyuan Wang, Yunzhi Liu, Nan Han, Yuan Gao, and Jun Luo
- Subjects
Organic Chemistry ,Physical and Theoretical Chemistry ,Biochemistry - Abstract
Pd-catalyzed ortho-C(sp3)–H arylation of aromatic aldehydes using 2-amino-N-methyl-acetamide as a simple, efficient and commercially available L,L-type transient directing group (TDG) is reported.
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- 2023
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28. Nanocrystallite Seeding of Metastable Ferroelectric Phase Formation in Atomic Layer-Deposited Hafnia–Zirconia Alloys
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Zhouchangwan Yu, Balreen Saini, Yunzhi Liu, Fei Huang, Apurva Mehta, John D. Baniecki, H.-S. Philip Wong, Wilman Tsai, and Paul C. McIntyre
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General Materials Science - Abstract
Hafnia-based ferroelectric thin films are promising for semiconductor memory and neuromorphic computing applications. Amorphous, as-deposited, thin-film binary alloys of HfO
- Published
- 2022
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29. Strategies for Modulating the Catalytic Activity and Selectivity of Manganese Antimonates for the Oxygen Reduction Reaction
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Melissa E. Kreider, G. T. Kasun Kalhara Gunasooriya, Yunzhi Liu, José A. Zamora Zeledón, Eduardo Valle, Chengshuang Zhou, Joseph H. Montoya, Alessandro Gallo, Robert Sinclair, Jens K. Nørskov, Michaela Burke Stevens, and Thomas F. Jaramillo
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General Chemistry ,Catalysis - Published
- 2022
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30. Interlayer engineering of Fe3GeTe2: From 3D superlattice to 2D monolayer.
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Yecun Wu, Bai Yang Wang, Yijun Yu, Yanbin Li, Ribeiro, Henrique B., Jierong Wang, Rong Xu, Yunzhi Liu, Yusheng Ye, Jiawei Zhou, Feng Ke, Harbola, Varun, Heinz, Tony F., Hwang, Harold Y., and Yi Cui
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MAGNETIC crystals ,MAGNETIC films ,THIN films ,MONOMOLECULAR films ,THIN film deposition ,ORGANIC coatings ,MELT spinning - Abstract
The discoveries of ferromagnetism down to the atomically thin limit in van der Waals (vdW) crystals by mechanical exfoliation have enriched the family of magnetic thin films [C. Gong et al., Nature 546, 265-269 (2017) and B. Huang et al., Nature 546, 270-273 (2017)]. However, compared to the study of traditional magnetic thin films by physical deposition methods, the toolbox of the vdW crystals based on mechanical exfoliation and transfer suffers from low yield and ambient corrosion problem and now is facing new challenges to study magnetism. For example, the formation of magnetic superlattice is difficult in vdW crystals, which limits the study of the interlayer interaction in vdW crystals [M. Gibertini, M. Koperski, A. F. Morpurgo, K. S. Novoselov, Nat. Nanotechnol. 14, 408-419 (2019)]. Here, we report a strategy of interlayer engineering of the magnetic vdW crystal Fe
3 GeTe2 (FGT) by intercalating quaternary ammonium cations into the vdW spacing. Both three-dimensional (3D) vdW superlattice and two-dimensional (2D) vdW monolayer can be formed by using this method based on the amount of intercalant. On the one hand, the FGT superlattice shows a strong 3D critical behavior with a decreased coercivity and increased domain wall size, attributed to the co-engineering of the anisotropy, exchange interaction, and electron doping by intercalation. On the other hand, the 2D vdW few layers obtained by over-intercalation are capped with organic molecules from the bulk crystal, which not only enhances the ferromagnetic transition temperature (TC ), but also substantially protects the thin samples from degradation, thus allowing the preparation of large-scale FGT ink in ambient environment. [ABSTRACT FROM AUTHOR]- Published
- 2024
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31. The Development and Validation of the Social Network Sites (SNSs) Usage Questionnaire.
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Yuanyuan Shi, Yu L. L. Luo, Ziyan Yang, Yunzhi Liu, and Huajian Cai
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- 2014
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32. Characterization of a Dynamic Y2Ir2O7 Catalyst during the Oxygen Evolution Reaction in Acid
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McKenzie A. Hubert, Alessandro Gallo, Yunzhi Liu, Eduardo Valle, Joel Sanchez, Dimosthenis Sokaras, Robert Sinclair, Laurie A. King, and Thomas F. Jaramillo
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General Energy ,Physical and Theoretical Chemistry ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials - Published
- 2022
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33. Mannan-Binding Lectin Deficiency Limits Inflammation-induced Myeloid-Derived Suppressor Cells Expansion via Modulating Tumor Necrosis Factor Alpha-triggered Apoptosis
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Lijun Dong, Honglian Jiang, Kai Chen, Jingwen Xie, Qing An, Fan Deng, Zhengyang Sun, Yunzhi Liu, Jia Zhou, Liyun Zhang, Xiao Lu, Mingyong Wang, Zhengliang Chen, Xiaoming Zou, and Daming Zuo
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Inflammation ,Interleukin-6 ,Tumor Necrosis Factor-alpha ,Arthritis ,Myeloid-Derived Suppressor Cells ,Granulocyte-Macrophage Colony-Stimulating Factor ,Apoptosis ,Cell Biology ,Mannose-Binding Lectin ,Applied Microbiology and Biotechnology ,Mice ,Animals ,Cytokines ,Molecular Biology ,Ecology, Evolution, Behavior and Systematics ,Developmental Biology - Published
- 2022
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34. Facile construction of the all-bridge-position-functionalized 2,4,6,8-tetraazaadamantane skeleton and conversion of its N-functionalities
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Rongbin Cai, Qi Zhou, Tianjiao Hou, Bing Li, Yunzhi Liu, Huan Li, Yuan Gao, Longyi Zhu, and Jun Luo
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Organic Chemistry - Abstract
An unusual protocol of a “one-pot” three-step strategy to build the 2,4,6,8-tetraazaadamantane skeleton was developed. 17 products were obtained in 19–46% yields, and the N-benzyl groups were transferred to nitroso, acetyl, benzoyl and nitro groups.
- Published
- 2022
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35. Electrified Operando-Freezing of Electrocatalytic CO2 Reduction Cells for Cryogenic Electron Microscopy
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Yanbin Li, Yunzhi Liu, Zewen Zhang, Weijiang Zhou, Jinwei Xu, Yusheng Ye, Yucan Peng, Xin Xiao, Wah Chiu, Robert Sinclair, Yuzhang Li, and Yi Cui
- Abstract
The ability to freeze and stabilize reaction intermediates in their metastable states and obtain their structural and chemical information with high spatial resolution would be very powerful to unravel the fundamentals in many important materials technologies such as catalysis and batteries. Here, we develop an electrified operando-freezing methodology for the first time to preserve these metastable states under electrochemical reaction conditions for cryogenic electron microscopy (cryo-EM) imaging and spectroscopy. Using Cu catalysts for CO2 reduction as a model system, we observe restructuring of the Cu catalyst in a CO2 atmosphere while the same catalyst remains intact in an air atmosphere at the nanometer scale. Furthermore, we discover the existence of single valance Cu (1+) state and C-O bonding at the electrified liquid-solid interface of the operando-frozen samples, which are key reaction intermediates that traditional ex situ measurements fail to detect. This work highlights our novel technique to study the local structure and chemistry of electrified liquid-solid interfaces, which has broad impact for many electrochemical reactions.
- Published
- 2023
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36. Resolving Current-Dependent Regimes of Electroplating Mechanisms for Fast Charging Lithium Metal Anodes
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David T. Boyle, Yuzhang Li, Allen Pei, Rafael A. Vilá, Zewen Zhang, Philaphon Sayavong, Mun Sek Kim, William Huang, Hongxia Wang, Yunzhi Liu, Rong Xu, Robert Sinclair, Jian Qin, Zhenan Bao, and Yi Cui
- Subjects
Mechanical Engineering ,General Materials Science ,Bioengineering ,General Chemistry ,Condensed Matter Physics - Abstract
Poor fast-charge capabilities limit the usage of rechargeable Li metal anodes. Understanding the connection between charging rate, electroplating mechanism, and Li morphology could enable fast-charging solutions. Here, we develop a combined electroanalytical and nanoscale characterization approach to resolve the current-dependent regimes of Li plating mechanisms and morphology. Measurement of Li
- Published
- 2022
37. Persistent and partially mobile oxygen vacancies in Li-rich layered oxides
- Author
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David A. Shapiro, Yunzhi Liu, Robert Sinclair, William E. Gent, Young-Sang Yu, Sungjin Ahn, Samanbir Kalirai, Xin Xu, Peter M. Csernica, Ann F. Marshall, Michael F. Toney, Kipil Lim, William C. Chueh, Emma Kaeli, and Kevin H. Stone
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Battery (electricity) ,Materials science ,Renewable Energy, Sustainability and the Environment ,Diffusion ,Oxide ,Energy Engineering and Power Technology ,chemistry.chemical_element ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Oxygen ,0104 chemical sciences ,Electronic, Optical and Magnetic Materials ,Characterization (materials science) ,chemistry.chemical_compound ,Fuel Technology ,chemistry ,Chemical physics ,Phase (matter) ,Electrode ,0210 nano-technology ,Absorption (electromagnetic radiation) - Abstract
Increasing the energy density of layered oxide battery electrodes is challenging as accessing high states of delithiation often triggers voltage degradation and oxygen release. Here we utilize transmission-based X-ray absorption spectromicroscopy and ptychography on mechanically cross-sectioned Li1.18–xNi0.21Mn0.53Co0.08O2–δ electrodes to quantitatively profile the oxygen deficiency over cycling at the nanoscale. The oxygen deficiency penetrates into the bulk of individual primary particles (~200 nm) and is well-described by oxygen vacancy diffusion. Using an array of characterization techniques, we demonstrate that, surprisingly, bulk oxygen vacancies that persist within the native layered phase are indeed responsible for the observed spectroscopic changes. We additionally show that the arrangement of primary particles within secondary particles (~5 μm) causes considerable heterogeneity in the extent of oxygen release between primary particles. Our work merges an ensemble of length-spanning characterization methods and informs promising approaches to mitigate the deleterious effects of oxygen release in lithium-ion battery electrodes. Oxygen release in Li-rich layered oxides is of both fundamental and practical interest in batteries, but a varied mechanistic understanding exists. Here the authors evaluate the extent of oxygen release over extended cycles and present a comprehensive picture of the phenomenon that unifies the current explanations.
- Published
- 2021
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38. Epitaxial Stabilization and Oxygen Evolution Reaction Activity of Metastable Columbite Iridium Oxide
- Author
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Michal Bajdich, Harold Y. Hwang, Yunzhi Liu, Robert Sinclair, Raul A. Flores, Bai Yang Wang, Kyuho Lee, and Yasuyuki Hikita
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Materials science ,Inorganic chemistry ,Oxygen evolution ,Energy Engineering and Power Technology ,Iridium oxide ,engineering.material ,Epitaxy ,Pulsed laser deposition ,Catalysis ,Metastability ,Materials Chemistry ,Electrochemistry ,engineering ,Chemical Engineering (miscellaneous) ,Electrical and Electronic Engineering ,Columbite - Abstract
Non-rutile polymorphs of binary iridium oxide such as columbite IrO2 (α-IrO2) are promising candidates for highly active acid-stable oxygen evolution reaction (OER) catalysts, yet their synthesis h...
- Published
- 2021
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39. Identifying and Tuning the In Situ Oxygen-Rich Surface of Molybdenum Nitride Electrocatalysts for Oxygen Reduction
- Author
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Brenna M. Gibbons, Ryan C. Davis, Anjli M. Patel, Apurva Mehta, Melissa E. Kreider, Thomas F. Jaramillo, Michaela Burke Stevens, Yunzhi Liu, Robert Sinclair, Jens K. Nørskov, Michael J. Statt, Anton V. Ievlev, Laurie A. King, Zhenbin Wang, and Alessandro Gallo
- Subjects
In situ ,Materials science ,Inorganic chemistry ,Energy Engineering and Power Technology ,chemistry.chemical_element ,Nitride ,Electrocatalyst ,Oxygen reduction ,Catalysis ,chemistry ,Molybdenum ,Materials Chemistry ,Electrochemistry ,Chemical Engineering (miscellaneous) ,Oxygen reduction reaction ,Oxygen rich ,Electrical and Electronic Engineering - Abstract
Rigorous in situ studies of electrocatalysts are required to enable the design of higher performing materials. Nonplatinum group metals for oxygen reduction reaction (ORR) catalysis containing ligh...
- Published
- 2020
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40. Involvement of Nitric Oxide and Melatonin Enhances Cadmium Resistance of Tomato Seedlings through Regulation of the Ascorbate–Glutathione Cycle and ROS Metabolism
- Author
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Junrong Xu, Zhien Wei, Xuefang Lu, Yunzhi Liu, Wenjin Yu, and Changxia Li
- Subjects
Inorganic Chemistry ,nitric oxide ,melatonin ,Cd stress ,AsA-GSH cycle ,regulator pathway ,gene expression ,Organic Chemistry ,General Medicine ,Physical and Theoretical Chemistry ,Molecular Biology ,Spectroscopy ,Catalysis ,Computer Science Applications - Abstract
Melatonin (MT) and nitric oxide (NO) act as signaling molecules that can enhance cadmium (Cd) stress resistance in plants. However, little information is available about the relationship between MT and NO during seedling growth under Cd stress. We hypothesize that NO may be involved in how MT responds to Cd stress during seedling growth. The aim of this study is to evaluate the relationship and mechanism of response. The results indicate that different concentrations of Cd inhibit the growth of tomato seedlings. Exogenous MT or NO promotes seedling growth under Cd stress, with a maximal biological response at 100 μM MT or NO. The promotive effects of MT-induced seedling growth under Cd stress are suppressed by NO scavenger 2-4-carboxyphenyl-4,4,5,5-tetramethyl-imidazoline-1-oxyl-3-oxide (cPTIO), suggesting that NO may be involved in MT-induced seedling growth under Cd stress. MT or NO decreases the content of hydrogen peroxide (H2O2), malonaldehyde (MDA), dehydroascorbic acid (DHA), and oxidized glutathione (GSSG); improves the content of ascorbic acid (AsA) and glutathione (GSH) and the ratios of AsA/DHA and GSH/GSSG; and enhances the activities of glutathione reductase (GR), monodehydroascorbic acid reductase (MDHAR), dehydroascorbic acid reductase (DHAR), ascorbic acid oxidase (AAO), and ascorbate peroxidase (APX) to alleviate oxidative damage. Moreover, the expression of genes associated with the ascorbate–glutathione (AsA-GSH) cycle and reactive oxygen species (ROS) are up-regulated by MT or NO under Cd conditions, including AAO, AAOH, APX1, APX6, DHAR1, DHAR2, MDHAR, and GR. However, NO scavenger cPTIO reverses the positive effects regulated by MT. The results indicate that MT-mediated NO enhances Cd tolerance by regulating AsA-GSH cycle and ROS metabolism.
- Published
- 2023
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41. Regulation of fruit ripening by MADS-box transcription factors
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Changxia Li, Xuefang Lu, Junrong Xu, and Yunzhi Liu
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Horticulture - Published
- 2023
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42. MBL Binding with AhR Controls Th17 Immunity in Silicosis-Associated Lung Inflammation and Fibrosis
- Author
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Yunzhi Liu, Na Zhao, Qishan Xu, Fan Deng, Ping Wang, Lijun Dong, Xiao Lu, Lihua Xia, Mingyong Wang, Zhengliang Chen, Jia Zhou, and Daming Zuo
- Subjects
Immunology ,Immunology and Allergy ,Journal of Inflammation Research - Abstract
Yunzhi Liu,1,2,* Na Zhao,3,* Qishan Xu,1,2 Fan Deng,1 Ping Wang,1,2 Lijun Dong,1,2 Xiao Lu,2 Lihua Xia,3 Mingyong Wang,4 Zhengliang Chen,2 Jia Zhou,2 Daming Zuo1,5 1Department of Medical Laboratory, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, Guangdong, 510515, Peopleâs Republic of China; 2Guangdong Province Key Laboratory of Proteomics, Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, 510515, Peopleâs Republic of China; 3Department of Medical Laboratory, Guangdong Province Hospital for Occupational Disease Prevention and Treatment, Guangzhou, Guangdong, 510399, Peopleâs Republic of China; 4Xinxiang Key Laboratory of Immunoregulation and Molecular Diagnostics, Xinxiang, 453003, Peopleâs Republic of China; 5Microbiome Medicine Center, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, 510282, Peopleâs Republic of China*These authors contributed equally to this workCorrespondence: Jia Zhou, Guangdong Province Key Laboratory of Proteomics, Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, 510515, Peopleâs Republic of China, Tel +86-20-61648220, Fax +86-20-61648221, Email yuguomm@smu.edu.cn Daming Zuo, Department of Medical Laboratory, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, Guangdong, 510515, Peopleâs Republic of China, Tel +86-20-61648552, Fax + 86-20-61648221, Email zdaming@smu.edu.cnObjective: Mannan-binding lectin (MBL), a soluble pattern recognition molecule of the innate immune system, is primarily synthesized in the liver and secreted into the circulation. Low serum level of MBL has been reported to be related to an increased risk of lung diseases. Herein, we aimed to investigate the function of MBL in silicosis-associated pulmonary inflammation.Methods: Serum collected from silicosis patients was tested for correlation between serum MBL levels and Th17 immunity. In vitro studies were performed to further demonstrated the effect of MBL on Th17 polarization. Silica was intratracheally injected in wild type (WT) or MBL-deficient (MBLâ/â) mice to induce silicosis-associated lung inflammation and fibrosis. Th17 response was evaluated to explore the effect of MBL on silicosis in vivo.Results: Silicosis patients with high serum MBL levels displayed ameliorative lung function. We demonstrated that serum MBL levels negatively correlated to Th17 cell frequency in silicosis patients. MBL protein markedly reduced expression of IL-17 but enhanced expression of Foxp3 in CD4+ T cells in vitro when subjected to Th17 or Treg polarizing conditions, respectively. The presence of MBL during Th17 cell polarization significantly limited aryl hydrocarbon receptor (AhR) expression and suppressed the signal transducer and activator of transcription 3 (STAT3) phosphorylation. Treatment with the AhR antagonist abolished the effect of MBL on Th17 response. Strikingly, MBL directly bound to AhR and affected its nuclear translocation. Furthermore, MBLâ/â mice displayed elevated Th17 cell levels compared with WT mice in response to the silica challenge. The CD4+ T lymphocytes from silica-administrated MBLâ/â mice exhibited more AhR expression than the wild-type counterparts.Conclusion: Our study suggested that MBL limited the Th17 immunity via controlling the AhR/STAT3 pathway, thus providing new insight into silicosis and other inflammatory diseases in patients with MBL deficiency.Keywords: silicosis, mannan-binding lectin, aryl hydrocarbon receptor, signal transducer and activator of transcription 3, Th17 cell
- Published
- 2022
43. Mannan-Binding Lectin Reduces Epithelial-Mesenchymal Transition in Pulmonary Fibrosis via Inactivating the Store-Operated Calcium Entry Machinery
- Author
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Yunzhi Liu, Xianghuan Xie, Ping Wang, Jialiang Luo, Yu Chen, Qishan Xu, Jia Zhou, Xiao Lu, Jianbo Zhao, Zhengliang Chen, and Daming Zuo
- Subjects
Immunology and Allergy - Abstract
Idiopathic pulmonary fibrosis (IPF) is a type of idiopathic interstitial pneumonia with a poor clinical prognosis. Increasing evidence has demonstrated that epithelial-mesenchymal transition (EMT) contributes to the production of pathogenic myofibroblasts and plays a pivotal role in the development of pulmonary fibrosis. Mannan-binding lectin (MBL) is a soluble calcium-dependent complement molecule. Several studies have reported associations between serum MBL levels and lung diseases; however, the effect of MBL on IPF remains unknown. The present study observed aggravated pulmonary fibrosis in bleomycin-treated MBL−/− mice compared with their wild-type counterparts. Lung tissues from bleomycin-treated MBL−/− mice displayed a more severe EMT phenotype. In vitro studies determined that MBL inhibited the EMT process through attenuating store-operated calcium entry (SOCE) signaling. It was further demonstrated that MBL promoted the ubiquitination of Orai1, an essential component of SOCE, via pyruvate dehydrogenase kinase 1 (PDK1)-serum glucocorticoid-regulated kinase 1 signaling. PDK1 inhibition abolished the MBL-mediated regulation of SOCE activity and the EMT process. Notably, biochemical analysis showed that MBL interacted with PDK1 and contributed to PDK1 ubiquitination. In summary, the present findings suggested that MBL limited the EMT phenotype in human alveolar epithelial cells through regulation of SOCE, and MBL could be recognized as a potential therapeutic target for IPF.
- Published
- 2021
44. A Modified Adaptive Filtering Acquisition Method for PN Code with Data Modulation.
- Author
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Yunzhi Liu, Yahan Pan, and Fuqiang Yao
- Published
- 2011
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45. First-row Transition Metal Antimonates for the Oxygen Reduction Reaction
- Author
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Yunzhi Liu, Zhenbin Wang, G. T. Kasun Kalhara Gunasooriya, Eduardo Valle, Jens K. Nørskov, An-Chih Yang, Melissa E. Kreider, Michaela Burke Stevens, José A. Zamora Zeledón, Thomas F. Jaramillo, Alessandro Gallo, and Robert Sinclair
- Subjects
Aqueous solution ,Materials science ,Inorganic chemistry ,General Engineering ,Oxide ,General Physics and Astronomy ,Pourbaix diagram ,Catalysis ,Metal ,chemistry.chemical_compound ,chemistry ,Transition metal ,visual_art ,visual_art.visual_art_medium ,General Materials Science ,Antimonate ,Oxygen binding - Abstract
The development of inexpensive and abundant catalysts with high activity, selectivity, and stability for the oxygen reduction reaction (ORR) is imperative for the widespread implementation of fuel cell devices. Herein, we present a combined theoretical-experimental approach to discover and design first-row transition metal antimonates as promising electrocatalytic materials for the ORR. Theoretically, we identify first-row transition metal antimonates – MSb2O6, where M = Mn, Fe, Co, and Ni – as non-precious metal catalysts with promising oxygen binding energetics, conductivity, thermodynamic phase stability and aqueous stability. Among the considered antimonates, MnSb2O6 shows the highest theoretical ORR activity based on the 4e− ORR kinetic volcano. Experimentally, nanoparticulate transition metal antimonate catalysts are found to have a minimum of a 2.5-fold enhancement in intrinsic mass activity (on transition metal mass basis) relative to the corresponding transition metal oxide at 0.7 V vs RHE in 0.1 M KOH. MnSb2O6 is the most active catalyst under these conditions, with a 3.5-fold enhancement on a per Mn mass activity basis and 25-fold enhancement on a surface area basis over its antimony-free counterpart. Electrocatalytic and material stability are demonstrated over a 5 h chronopotentiometry experiment in the stability window identified by Pourbaix analysis. This study further highlights the stable and electrically conductive antimonate structure as a promising framework to tune the activity and selectivity of non-precious metal oxide active sites for ORR catalysis.
- Published
- 2021
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46. Scavenger receptor A impairs interferon response to <scp>HBV</scp> infection by limiting <scp>TRAF</scp> 3 ubiquitination through recruiting <scp>OTUB</scp> 1
- Author
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Jia Zhou, Qintao Lai, Liqian Chen, Daming Zuo, Yan Liu, Yue Yin, Liyun Zhang, Yunzhi Liu, Lijun Dong, Aiping Yin, Min Xu, Zhengliang Chen, and Mengying Xie
- Subjects
0301 basic medicine ,TRAF3 ,Hepatitis B virus ,Biology ,medicine.disease_cause ,Biochemistry ,Virus ,Mice ,03 medical and health sciences ,0302 clinical medicine ,Immune system ,Loss of Function Mutation ,Interferon ,medicine ,Animals ,Humans ,Scavenger receptor ,Molecular Biology ,Innate immune system ,TNF Receptor-Associated Factor 3 ,Ubiquitination ,Pattern recognition receptor ,Scavenger Receptors, Class A ,Hep G2 Cells ,Cell Biology ,Hepatitis B ,Immunity, Innate ,Mice, Inbred C57BL ,Cysteine Endopeptidases ,030104 developmental biology ,Gain of Function Mutation ,030220 oncology & carcinogenesis ,Immunology ,Interferons ,medicine.drug - Abstract
The battle between hepatitis B virus (HBV) infection and the host immune defense determines the outcome of the disease. Scavenger receptor A (SRA) is a phagocytic pattern recognition receptor involved in various cellular processes, including lipid metabolism, recognition, and clearance of pathogens or modified self-molecules. Emerging evidence pointed out that SRA might act as an immunomodulator that contributes to innate immune defense against invading pathogens. Herein, we examined the role of SRA in the initiation of type I interferon (IFN) response to HBV infection and the virus clearance. Our results showed that SRA-deficient (SRA-/- ) mice were resistant to HBV infection developed by hydrodynamic injection of HBV replicon plasmid. We found lower levels of HBV DNA and viral protein expression in SRA-/- mice, which was associated with enhanced type I IFN production, compared with wild-type controls. Besides, we performed gain and loss of function experiments and determined that SRA inhibits innate antiviral immune responses to HBV. SRA could interact directly with tumor necrosis factor receptor-associated factor 3 (TRAF3) and inhibit its K63-linked ubiquitination. Moreover, we provided evidence that SRA negatively regulates the stability of TRAF3 protein by promoting the recruitment of OTUB1 to TRAF3. Our findings indicate that SRA plays a crucial role in innate immune signaling by targeting TRAF3 for degradation and balancing the innate antiviral immunity.
- Published
- 2019
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47. Anthocyanin Biosynthesis Induced by MYB Transcription Factors in Plants
- Author
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Changxia Li, Wenjin Yu, Junrong Xu, Xuefang Lu, and Yunzhi Liu
- Subjects
Cytokinins ,Organic Chemistry ,General Medicine ,Plants ,Plants, Genetically Modified ,Antioxidants ,Catalysis ,Computer Science Applications ,Anthocyanins ,Inorganic Chemistry ,Gene Expression Regulation, Plant ,Basic Helix-Loop-Helix Transcription Factors ,Physical and Theoretical Chemistry ,Molecular Biology ,Spectroscopy ,Plant Proteins ,Transcription Factors - Abstract
Anthocyanins act as polyphenolic pigment that is ubiquitously found in plants. Anthocyanins play a role not only in health-promoting as an antioxidant, but also in protection against all kinds of abiotic and biotic stresses. Most recent studies have found that MYB transcription factors (MYB TFs) could positively or negatively regulate anthocyanin biosynthesis. Understanding the roles of MYB TFs is essential in elucidating how MYB TFs regulate the accumulation of anthocyanin. In the review, we summarized the signaling pathways medicated by MYB TFs during anthocyanin biosynthesis including jasmonic acid (JA) signaling pathway, cytokinins (CKs) signaling pathway, temperature-induced, light signal, 26S proteasome pathway, NAC TFs, and bHLH TFs. Moreover, structural and regulator genes induced by MYB TFs, target genes bound and activated or suppressed by MYB TFs, and crosstalk between MYB TFs and other proteins, were found to be vitally important in the regulation of anthocyanin biosynthesis. In this study, we focus on the recent knowledge concerning the regulator signaling and mechanism of MYB TFs on anthocyanin biosynthesis, covering the signaling pathway, genes expression, and target genes and protein expression.
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- 2022
- Full Text
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48. Omega-3 polyunsaturated fatty acids inhibit IL-11/STAT3 signaling in hepatocytes during acetaminophen hepatotoxicity
- Author
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Jingmin Lin, Daming Zuo, Jia Zhou, Zhuonan Li, Zhengliang Chen, Yunzhi Liu, Yu Chen, and Xiao Lu
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Male ,STAT3 Transcription Factor ,Cirrhosis ,medicine.medical_treatment ,ERK1/2-Fos-like-1 signaling ,Mice, Transgenic ,Pharmacology ,Mice ,Downregulation and upregulation ,Fatty Acids, Omega-3 ,Genetics ,medicine ,Animals ,Phosphorylation ,omega-3 polyunsaturated fatty acids ,Acetaminophen ,Liver injury ,chemistry.chemical_classification ,Chemistry ,Fatty liver ,digestive, oral, and skin physiology ,General Medicine ,Articles ,Liver Failure, Acute ,medicine.disease ,Interleukin-11 ,STAT3 signaling ,Mice, Inbred C57BL ,Cytokine ,Liver ,Apoptosis ,IL-11 ,Hepatocytes ,Chemical and Drug Induced Liver Injury ,medicine.drug ,Polyunsaturated fatty acid ,Signal Transduction - Abstract
Omega‑3 polyunsaturated fatty acids (n‑3 PUFAs) exert a negative effect on IL‑6 production in several liver disorders, including cirrhosis, acute liver failure and fatty liver disease. However, its effect on the production of IL‑11, another important IL‑6 family cytokine, remains unclear. IL‑11 was found to be significantly elevated in acetaminophen (APAP)‑induced liver damage. The aim of the present study was to investigate whether and how n‑3 PUFAs modulate IL‑11 production during APAP‑induced liver injury. For that purpose, wild‑type (WT) and fat‑1 transgenic mice were intraperitoneally injected with APAP to induce liver injury. Serum was collected for ELISA and alanine aminotransferase assay. The hepatocytes of APAP‑injected mice were isolated for reverse transcription‑quantitative PCR and western blot analyses. For the in vitro study, primary hepatocytes isolated from WT or fat‑1 mice were stimulated with APAP. The results revealed that both endogenous and exogenous n‑3 PUFAs significantly aggravated APAP‑induced liver damage via the downregulation of STAT3 signaling. Notably, n‑3 PUFAs inhibited IL‑11 expression, but not IL‑6 expression in hepatocytes during the APAP challenge. Furthermore, it was demonstrated that limited phosphorylation of ERK1/2 and Fos‑like‑1 (Fra‑1) expression are responsible for the n‑3 PUFA‑mediated inhibitory effect on IL‑11 production in APAP‑treated hepatocytes. It was concluded that n‑3 PUFAs inhibit IL‑11 production and further STAT3 activation in hepatocytes during APAP‑induced liver injury. Therefore, ERK1/2‑mediated Fra‑1 expression is responsible for the effect of n‑3 PUFAs on IL‑11 expression.
- Published
- 2021
49. Mannan-binding lectin deficiency augments hepatic endoplasmic reticulum stress through IP3R-controlled calcium release
- Author
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Xiao Lu, Zhuojun Zheng, Zhengliang Chen, Yunzhi Liu, Mengyao Hu, Daming Zuo, Jia Zhou, Fan Deng, Ping Wang, Yu Chen, Lijun Dong, and Jingmin Lin
- Subjects
Physiology ,Population ,chemistry.chemical_element ,chemical and pharmacologic phenomena ,Apoptosis ,Calcium ,Endoplasmic Reticulum ,Mannose-Binding Lectin ,Mice ,medicine ,Animals ,Humans ,education ,Molecular Biology ,Mannan-binding lectin ,Calcium metabolism ,Liver injury ,education.field_of_study ,Endoplasmic reticulum ,Cell Biology ,bacterial infections and mycoses ,MBL deficiency ,medicine.disease ,Endoplasmic Reticulum Stress ,Cell biology ,chemistry ,Liver ,Unfolded protein response - Abstract
The aberrant release of endoplasmic reticulum (ER) calcium leads to the disruption of intracellular calcium homeostasis, which is associated with the occurrence of ER stress and closely related to the pathogenesis of liver damage. Mannan-binding lectin (MBL) is a soluble calcium-dependent protein synthesized primarily in hepatocytes and is a pattern recognition molecule in the innate immune system. MBL deficiency is highly prevalent in the population and has been reported to be associated with susceptibility to several liver diseases. We here showed that genetic MBL ablation strongly sensitized mice to ER stress-induced liver injury. Mechanistic studies established that MBL directly interacted with ER-resident chaperone immunoglobulin heavy chain binding protein (BiP), and MBL deficiency accelerated the separation of PKR-like ER kinase (PERK) from BiP during hepatic ER stress. Moreover, MBL deficiency led to enhanced activation of the PERK-C/EBP-homologous protein (CHOP) pathway and initiates an inositol 1,4,5-trisphosphate receptor (IP3R)-mediated calcium release from the ER, thereby aggravating the hepatic ER stress response. Our results demonstrate an unexpected function of MBL in ER calcium homeostasis and ER stress response, thus providing new insight into the liver injury related to ER stress in patients with MBL deficiency.
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- 2021
50. Inflammatory arthritis increases the susceptibility to acute immune-mediated hepatitis in mice through enhancing leptin expression in T cells
- Author
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Yunzhi Liu, Xiao Lu, Daming Zuo, Jia Zhou, Qishan Xu, Yu Chen, Lijun Dong, Qingyun Chen, Ping Wang, and Youyi Wang
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Leptin ,Inflammatory arthritis ,T-Lymphocytes ,Immunology ,Adipokine ,Arthritis ,Lymphocyte Activation ,Proinflammatory cytokine ,Hepatitis ,Immune system ,medicine ,Concanavalin A ,Hypersensitivity ,Animals ,Molecular Biology ,Inflammation ,business.industry ,medicine.disease ,Mice, Inbred C57BL ,Liver ,Acute Disease ,Cytokines ,Liver function ,Disease Susceptibility ,Inflammation Mediators ,business ,Signal Transduction - Abstract
Liver function abnormalities are common in patients with inflammatory arthritis. However, the precise mechanism is still unclear. In this study, inflammatory arthritis was established in mice by subcutaneous injection of complete Freund’s adjuvant, and the intravenous injection of concanavalin A (Con A) was employed to induce acute immune-mediated hepatitis in mice. The result showed that the arthritis mice were more susceptible to ConA-induced hepatitis than the control mice, as evidenced by increased hepatic necrosis, elevated serum alanine aminotransferase activity, and raised inflammatory cytokines. Besides, the in vitro assay demonstrated that the T cells from arthritis mice were more sensitive to the Con A stimulation than those from control mice. Moreover, we determined that the level of leptin, a kind of adipokine, was significantly increased in the serum and hepatic T cells of arthritis mice. Interestingly, the data indicated that the enhanced expression of leptin in hepatic T cells is responsible for the hypersensitivity of arthritis mice-derived T cells to Con A challenge. Collectively, our findings demonstrate an unexpected role of leptin in the connection between inflammatory arthritis and acute immune-mediated hepatitis, thus providing new insight into the clinical therapy of arthritis-related liver dysfunction.
- Published
- 2021
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