50 results on '"WANG Xue-qing"'
Search Results
2. Open-Shell Oligomers and Polymers: Theory, Characterization Methods, Molecular Design, and Applications
- Author
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Wang, Xue-Qing, Song, Cheng, and Lei, Ting
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- 2024
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3. The chromatin remodeler Ino80 regulates yeast stress tolerance and cell metabolism through modulating nitrogen catabolite repression
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Yuan, Bing, Wang, Wei-Bin, Wang, Xue-Qing, Liu, Chen-Guang, Hasunuma, Tomohisa, Kondo, Akihiko, and Zhao, Xin-Qing
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- 2024
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4. A novel microRNA-182/Interleukin-8 regulatory axis controls osteolytic bone metastasis of lung cancer
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Zhao, Ming-Na, Zhang, Ling-Fei, Sun, Zhen, Qiao, Li-Hua, Yang, Tao, Ren, Yi-Zhe, Zhang, Xian-Zhou, Wu, Lei, Qian, Wen-Li, Guo, Qiao-Mei, Xu, Wan-Xing, Wang, Xue-Qing, Wu, Fei, Wang, Lin, Gu, Yutong, Liu, Mo-Fang, and Lou, Jia-Tao
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- 2023
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5. High-mobility semiconducting polymers with different spin ground states
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Chen, Xiao-Xiang, Li, Jia-Tong, Fang, Yu-Hui, Deng, Xin-Yu, Wang, Xue-Qing, Liu, Guangchao, Wang, Yunfei, Gu, Xiaodan, Jiang, Shang-Da, and Lei, Ting
- Published
- 2022
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6. Connecting high-resolution 3D chromatin organization with epigenomics
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Feng, Fan, Yao, Yuan, Wang, Xue Qing David, Zhang, Xiaotian, and Liu, Jie
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- 2022
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7. Dissecting MENIN in bivalent gene regulation
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Wang, Xue Qing David and Dou, Yali
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- 2023
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8. Manipulating cell flocculation-associated protein kinases in Saccharomyces cerevisiae enables improved stress tolerance and efficient cellulosic ethanol production
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Ye, Pei-Liang, Wang, Xue-Qing, Yuan, Bing, Liu, Chen-Guang, and Zhao, Xin-Qing
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- 2022
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9. Copigmentation evidence of phenolic compound: The effect of caffeic and rosmarinic acids addition on the chromatic quality and phenolic composition of Cabernet Sauvignon red wine from the Hexi Corridor region (China)
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Zhang, Bo, Wang, Xue-Qing, Yang, Bo, Li, Ning-Ning, Niu, Jian-Ming, Shi, Xiao, and Han, Shun-Yu
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- 2021
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10. A smartphone-combined ratiometric fluorescence probe for specifically and visibly detecting cephalexin
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Hao, Ai-Yue, Wang, Xue-Qing, Mei, Yan-Zhen, Nie, Jun-Fang, Yang, Ya-Qiong, and Dai, Chuan-Chao
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- 2021
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11. Novel Roles of the Greatwall Kinase Rim15 in Yeast Oxidative Stress Tolerance through Mediating Antioxidant Systems and Transcriptional Regulation.
- Author
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Wang, Xue-Qing, Yuan, Bing, Zhang, Feng-Li, Liu, Chen-Guang, Auesukaree, Choowong, and Zhao, Xin-Qing
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OXIDATIVE stress ,GENETIC transcription regulation ,ACETIC acid ,GENE expression ,YAP signaling proteins ,EUKARYOTES - Abstract
The Greatwall-family protein kinase Rim15 is associated with the nutrient starvation response, whereas its role in oxidative stress responses remains unclear. Here, acetic acid and peroxide were used as two oxidative stress elicitors. The antioxidant indicator assay under acetic acid stress revealed the impaired growth in rim15Δ related to the regulation of antioxidant systems. Comparative transcriptome analysis revealed that differentially expressed genes (DEGs) are predicted to be mostly regulated by oxidative stress-responsive transcriptional factor Yap1. Among the DEGs, acetic acid stress-induced genes were found, and YAP1 disruption also inhibited their induction. The deletion of Rim15 or the Rim15 kinase domain in yap1Δ did not further decrease the gene expression, suggesting that Rim15 functions together with Yap1 in regulating acetic acid stress-induced genes, which requires Rim15 kinase activity. Additionally, Rim15 regulated H
2 O2 stress tolerance through partially similar but special mechanisms in that Rim15 kinase activity impacted acetic acid and H2 O2 stress tolerance in different degrees, indicating the different mechanisms underlying Rim15-mediated redox regulation against different stressors. These results benefit the better understanding of stress signaling pathways related to Rim15. Given that Rim15 and some of its target genes are conserved across eukaryotes, these results also provide a basis for studies of oxidative stress-related processes in other organisms. [ABSTRACT FROM AUTHOR]- Published
- 2024
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12. Approaching disorder-tolerant semiconducting polymers
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Yan, Xinwen, Xiong, Miao, Deng, Xin-Yu, Liu, Kai-Kai, Li, Jia-Tong, Wang, Xue-Qing, Zhang, Song, Prine, Nathaniel, Zhang, Zhuoqiong, Huang, Wanying, Wang, Yishan, Wang, Jie-Yu, Gu, Xiaodan, So, Shu Kong, Zhu, Jia, and Lei, Ting
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- 2021
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13. CDK4/6 inhibitors target SMARCA4-determined cyclin D1 deficiency in hypercalcemic small cell carcinoma of the ovary
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Xue, Yibo, Meehan, Brian, Macdonald, Elizabeth, Venneti, Sriram, Wang, Xue Qing D., Witkowski, Leora, Jelinic, Petar, Kong, Tim, Martinez, Daniel, Morin, Geneviève, Firlit, Michelle, Abedini, Atefeh, Johnson, Radia M., Cencic, Regina, Patibandla, Jay, Chen, Hongbo, Papadakis, Andreas I., Auguste, Aurelie, de Rink, Iris, Kerkhoven, Ron M., Bertos, Nicholas, Gotlieb, Walter H., Clarke, Blaise A., Leary, Alexandra, Witcher, Michael, Guiot, Marie-Christine, Pelletier, Jerry, Dostie, Josée, Park, Morag, Judkins, Alexander R., Hass, Ralf, Levine, Douglas A., Rak, Janusz, Vanderhyden, Barbara, Foulkes, William D., and Huang, Sidong
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- 2019
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14. SMARCA4 loss is synthetic lethal with CDK4/6 inhibition in non-small cell lung cancer
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Xue, Yibo, Meehan, Brian, Fu, Zheng, Wang, Xue Qing D., Fiset, Pierre Olivier, Rieker, Ralf, Levins, Cameron, Kong, Tim, Zhu, Xianbing, Morin, Geneviève, Skerritt, Lashanda, Herpel, Esther, Venneti, Sriram, Martinez, Daniel, Judkins, Alexander R., Jung, Sungmi, Camilleri-Broet, Sophie, Gonzalez, Anne V., Guiot, Marie-Christine, Lockwood, William W., Spicer, Jonathan D., Agaimy, Abbas, Pastor, William A., Dostie, Josée, Rak, Janusz, Foulkes, William D., and Huang, Sidong
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- 2019
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15. 2C-ChIP: measuring chromatin immunoprecipitation signal from defined genomic regions with deep sequencing
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Wang, Xue Qing David, Cameron, Christopher J. F., Paquette, Denis, Segal, Dana, Warsaba, Reid, Blanchette, Mathieu, and Dostie, Josée
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- 2019
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16. 电商速递自发气调包装对松茸货架期品质的 影响.
- Author
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YAO Gang, HU Xin, WANG Xue-qing, PENG Meng-yun, ZHANG Qian-qian, and GUAN Wen-qiang
- Abstract
Copyright of Storage & Process is the property of Tianjin Academy of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2023
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17. Spatial Organization of Epigenomes
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Dubé, Jonathan Christopher, Wang, Xue Qing David, and Dostie, Josée
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- 2016
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18. Effect of Angiotensin-Converting Enzyme Inhibitors on Physical Function in Elderly Subjects: A Systematic Review and Meta-Analysis
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Zhou, Ling-shan, Xu, Ling-jie, Wang, Xue-qing, Huang, Yi-huan, and Xiao, Qian
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- 2015
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19. Electronic and Magnetic Properties Modulated by Adsorption of 3d Transition Metal Atoms in Monolayer and Bilayer MoS2 Sheets
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Wang, Xue-Qing, Chen, Wei-Guang, Zhu, Zhi-Li, and Jia, Yu
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- 2015
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20. Progress of Microencapsulated Phycocyanin in Food and Pharma Industries: A Review.
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Li, Yang, Li, Xu, Liang, Zi-Peng, Chang, Xin-Ying, Li, Fu-Tong, Wang, Xue-Qing, and Lian, Xi-Jun
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PHYCOCYANIN ,MICROENCAPSULATION ,SPRAY drying ,FLUORESCENT proteins ,FOOD industry ,LIPOSOMES - Abstract
Phycocyanin is a blue fluorescent protein with multi-bioactive functions. However, the multi-bioactivities and spectral stability of phycocyanin are susceptible to external environmental conditions, which limit its wide application. Here, the structure, properties, and biological activity of phycocyanin were discussed. This review highlights the significance of the microcapsules' wall materials which commonly protect phycocyanin from environmental interference and summarizes the current preparation principles and characteristics of microcapsules in food and pharma industries, including spray drying, electrospinning, electrospraying, liposome delivery, sharp-hole coagulation baths, and ion gelation. Moreover, the major technical challenge and corresponding countermeasures of phycocyanin microencapsulation are also appraised, providing insights for the broader application of phycocyanin. [ABSTRACT FROM AUTHOR]
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- 2022
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21. Tropoelastin Incorporation into a Dermal Regeneration Template Promotes Wound Angiogenesis
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Wang, Yiwei, Mithieux, Suzanne M., Kong, Yvonne, Wang, Xue-Qing, Chong, Cassandra, Fathi, Ali, Dehghani, Fariba, Panas, Eleni, Kemnitzer, John, Daniels, Robert, Kimble, Roy M., Maitz, Peter K., Li, Zhe, and Weiss, Anthony S.
- Published
- 2015
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22. Decreased SIRT3 in aged human mesenchymal stromal/stem cells increases cellular susceptibility to oxidative stress
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Wang, Xue-Qing, Shao, Yong, Ma, Chong-Yi, Chen, Wei, Sun, Lu, Liu, Wei, Zhang, Dong-Yang, Fu, Bi-Cheng, Liu, Kai-Yu, Jia, Zhi-Bo, Xie, Bao-Dong, Jiang, Shu-Lin, Li, Ren-Ke, and Tian, Hai
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- 2014
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23. 3'HS1 CTCF binding site in human β-globin locus regulates fetal hemoglobin expression.
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Himadewi, Pamela, David Wang, Xue Qing, Fan Feng, Gore, Haley, Yushuai Liu, Lei Yu, Kurita, Ryo, Yukio Nakamura, Pfeifer, Gerd P., Jie Liu, and Xiaotian Zhang
- Subjects
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FETAL hemoglobin , *BINDING sites , *LOCUS (Genetics) , *LOCUS (Mathematics) , *HEMATOPOIETIC stem cells , *SICKLE cell anemia , *GLOBIN genes , *GENOME editing - Abstract
Mutations in the adult β-globin gene can lead to a variety of hemoglobinopathies, including sickle cell disease and β-thalassemia. An increase in fetal hemoglobin expression throughout adulthood, a condition named hereditary persistence of fetal hemoglobin (HPFH), has been found to ameliorate hemoglobinopathies. Deletional HPFH occurs through the excision of a significant portion of the 3′ end of the β-globin locus, including a CTCF binding site termed 3′HS1. Here, we show that the deletion of this CTCF site alone induces fetal hemoglobin expression in both adult CD34+ hematopoietic stem and progenitor cells and HUDEP-2 erythroid progenitor cells. This induction is driven by the ectopic access of a previously postulated distal enhancer located in the OR52A1 gene downstream of the locus, which can also be insulated by the inversion of the 3′HS1 CTCF site. This suggests that genetic editing of this binding site can have therapeutic implications to treat hemoglobinopathies. [ABSTRACT FROM AUTHOR]
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- 2021
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24. Vitamin B6 inhibits macrophage activation to prevent lipopolysaccharide‐induced acute pneumonia in mice.
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Shan, Mei‐Rong, Zhou, Sheng‐Nan, Fu, Chang‐Ning, Song, Jia‐Wen, Wang, Xue‐Qing, Bai, Wen‐Wu, Li, Peng, Song, Ping, Zhu, Mo‐Li, Ma, Zhi‐Min, Liu, Zhan, Xu, Jian, Dong, Bo, Liu, Chao, Guo, Tao, Zhang, Cheng, and Wang, Shuang‐Xi
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VITAMIN B6 ,MACROPHAGE activation ,PERITONEAL macrophages ,AMINO acid metabolism ,PATHOLOGY ,PROTEIN kinases - Abstract
Macrophage activation participates in the pathogenesis of pulmonary inflammation. As a coenzyme, vitamin B6 (VitB6) is mainly involved in the metabolism of amino acids, nucleic acids, glycogen and lipids. We have previously reported that activation of AMP‐activated protein kinase (AMPK) produces anti‐inflammatory effects both in vitro and in vivo. Whether VitB6 via AMPK activation prevents pulmonary inflammation remains unknown. The model of acute pneumonia was induced by injecting mice with lipopolysaccharide (LPS). The inflammation was determined by measuring the levels of interleukin‐1 beta (IL‐1β), IL‐6 and tumour necrosis factor alpha (TNF‐α) using real time PCR, ELISA and immunohistochemistry. Exposure of cultured primary macrophages to VitB6 increased AMP‐activated protein kinase (AMPK) Thr172 phosphorylation in a time/dose‐dependent manner, which was inhibited by compound C. VitB6 downregulated the inflammatory gene expressions including IL‐1β, IL‐6 and TNF‐α in macrophages challenged with LPS. These effects of VitB6 were mirrored by AMPK activator 5‐aminoimidazole‐4‐carboxamide ribonucleoside (AICAR). However, VitB6 was unable to inhibit LPS‐induced macrophage activation if AMPK was in deficient through siRNA‐mediated approaches. Further, the anti‐inflammatory effects produced by VitB6 or AICAR in LPS‐treated macrophages were abolished in DOK3 gene knockout (DOK3−/−) macrophages, but were enhanced in macrophages if DOK3 was overexpressed. In vivo studies indicated that administration of VitB6 remarkably inhibited LPS‐induced both systemic inflammation and acute pneumonia in wild‐type mice, but not in DOK3−/− mice. VitB6 prevents LPS‐induced acute pulmonary inflammation in mice via the inhibition of macrophage activation. [ABSTRACT FROM AUTHOR]
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- 2020
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25. Influence of Trust Between Government and Social Capital on PPP Project Performance: The Mediating Role of Cooperative Behavior.
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WANG Xue-qing, ZHAO Min, and WANG Dan
- Abstract
To explain the difference on the positive or negative effects of trust on project performance in previous studies, a leoretical model involving trust (competence trust and goodwill trust) as independent variable, PPP project performance as ependent variable, and cooperative behavior (intra-role behavior and extra-role behavior) as mediator was built. The empirical nalysis of 286 valid questionnaires was conducted by structural equation model. The results indicated that both competence trust nd goodwill trust play positive roles in improving PPP project performance, and intra-role behavior and extra-role behavior have ositive effects on PPP project performance. Moreover, intra-role behavior and extra-role behavior partially mediates the relationship etween trust and PPP project performance. This study provides further understanding of the influence mechanism of different imensions of trust on PPP project performance in the context of China, and provides management suggestions for solving the low erformance problems in the practice of PPP projects. [ABSTRACT FROM AUTHOR]
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- 2019
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26. A novel strategy of identifying circRNA biomarkers in cardiovascular disease by meta‐analysis.
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Li, Jia‐Jiang‐Hui, Wang, Wei, Wang, Xue‐Qing, He, Yan, Wang, Si‐Si, and Yan, Yu‐Xiang
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CIRCULAR RNA ,FIXED effects model ,RANDOM effects model ,CARDIOVASCULAR diseases ,BIOMARKERS ,GENE ontology ,META-analysis - Abstract
Circular RNAs (circRNAs) are stable and abundantly expressed in vivo but are abnormally expressed in several diseases. This study aimed to identify circRNAs acting as potential biomarkers for cardiovascular disease (CVD). Research were retrieved from the articles published by September 2018 in eight databases to compare circRNA expression profiles between CVD and non‐CVD in human and animal models. Meta‐analysis under a random effects model was conducted. Subgroup analysis of tissue, species, and disease‐specific circRNAs was examined. Sensitivity analysis was performed to explain the uncertainty among all studies. Diagnostic accuracy of circRNAs in CVD was analyzed to testify the discriminative ability. Bioinformatics analysis including Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis was conducted. Among 6,284 differentially expressed circRNAs from 32 original studies, only 322 circRNAs were reported in three or more studies. The meta‐analysis identified 63 significantly dysregulated circRNAs, 44 upregulated and 19 downregulated. Among the tissue‐specific or disease‐specific circRNAs identified in the subgroup analysis, two circRNAs (circCDKN2BAS and circMACF1) showed the potential to be circulating biomarkers for CVD. Sensitivity analysis demonstrated 69% of circRNAs were in conformity with the overall analysis. The pooled diagnostic odds ratio was 2.94 (95% confidence interval [CI], 2.35–3.58), and the overall area under the curve value was 0.86 (95% CI, 0.83–0.89). GO and KEGG enrichment analyses indicated that the target genes of circRNAs participate in cardiogenesis‐related processes and pathways. This study demonstrates circRNAs have a high diagnostic value as potential biomarkers for CVD, and two candidate circRNAs, circCDKN2BAS and circMACF1, are potential circulating biomarkers for CVD diagnosis and treatment. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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27. S‐Nitrosylation of Prostacyclin Synthase Instigates Nitrate Cross‐Tolerance In Vivo.
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Zhou, Sheng‐Nan, Lu, Jun‐Xiu, Wang, Xue‐Qing, Shan, Mei‐Rong, Miao, Zhang, Pan, Guo‐Pin, Jian, Xu, Li, Peng, Ping, Song, Pang, Xin‐Yan, Bai, Yong‐Ping, Liu, Chao, and Wang, Shuang‐Xi
- Subjects
NITROSYLATION ,PROSTACYCLIN ,PROSTAGLANDINS ,NITROGLYCERIN ,IN vivo studies - Abstract
Development of nitrate tolerance is a major drawback to nitrate therapy. Prostacyclin (PGI2) is a powerful vasodilator produced from prostaglandin (PGH2) by prostacyclin synthase (PGIS) in endothelial cells. This study aimed to determine the role of PGIS S‐nitrosylation in nitrate tolerance induced by nitroglycerin (GTN). In endothelial cells, GTN increased PGIS S‐nitrosylation and disturbed PGH2 metabolism, which were normalized by mutants of PGIS cysteine 231/441 to alanine (C231/441A). Clearance of nitric oxide by carboxy‐PTIO or inhibition of S‐nitrosylation by N‐acetyl‐cysteine decreased GTN‐induced PGIS S‐nitrosylation. Enforced expression of mutated PGIS with C231/441A markedly abolished GTN‐induced PGIS S‐nitrosylation and nitrate cross‐tolerance in Apoe‐/‐ mice. Inhibition of cyclooxygenase 1 by aspirin, supplementation of PGI2 by beraprost, and inhibition of PGIS S‐nitrosylation by N‐acetyl‐cysteine improved GTN‐induced nitrate cross‐tolerance in rats. In patients, increased PGIS S‐nitrosylation was associated with nitrate tolerance. In conclusion, GTN induces nitrate cross‐tolerance through PGIS S‐nitrosylation at cysteine 231/441. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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28. Sirtuin3 protects aged human mesenchymal stem cells against oxidative stress and enhances efficacy of cell therapy for ischaemic heart diseases.
- Author
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Zhang, Dong‐Yang, Zhang, Chun‐Feng, Fu, Bi‐Cheng, Sun, Lu, Wang, Xue‐Qing, Chen, Wei, Liu, Wei, Liu, Kai‐Yu, Du, Guo‐Qing, Ma, Chong‐Yi, Jiang, Shu‐Lin, Li, Ren‐Ke, and Tian, Hai
- Subjects
SIRTUINS ,MESENCHYMAL stem cells ,OXIDATIVE stress ,HEART diseases ,CELLULAR therapy - Abstract
Sirtuin3 (SIRT3) is associated with oxidative stress and lifespan. However, the possible mechanisms underlying its influence are unknown. We hypothesized that SIRT3 increases the antioxidant capacity of aged cells and improves the efficacy of human mesenchymal stem cell (hMSC) therapy for ischaemic heart diseases in aged patients. In vitro, the antioxidant capacity of old hMSCs (O‐hMSCs) was increased after SIRT3 overexpression using a gene transfection technique, while the antioxidant capacity of young hMSCs (Y‐hMSCs) was decreased by SIRT3 silencing. The levels of forkhead box O3a (FoxO3a) in the nucleus, and antioxidant enzymes Mn‐superoxide dismutase (MnSOD) and catalase (CAT) increased in SIRT3‐overexpressed O‐hMSCs while they decreased in SIRT3‐silenced Y‐hMSCs after oxidative stress. Following myocardial infarction in adult rats in vivo, infarct size decreased and cardiac function was significantly enhanced after cell transplantation with SIRT3 overexpressed O‐hMSCs. The number of apoptotic cells decreased and the survival rate of transplanted cells increased following SIRT3 overexpression in O‐hMSCs. SIRT3 protects aged hMSCs against oxidative stress by positively regulating antioxidant enzymes (MnSOD and CAT) via increasing the expression of FoxO3a in the nucleus. The efficacy of aged hMSC transplantation therapy for ischaemic heart diseases can be improved by SIRT3 overexpression. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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29. Chromosome folding and its regulation in health and disease.
- Author
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Wang, Xue Qing David and Dostie, Josée
- Subjects
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CHROMOSOMES , *MOLECULAR genetics , *CHROMATIN , *GENE expression , *TRANSCRIPTIONAL repressor CTCF - Abstract
There are many ways in which cells may not adequately behave or respond to their environment, and the molecular mechanisms leading to these defects are as diverse as they are many. In this review, we report on how spatial chromatin organization contributes to the proper expression of genes, relating how CTCF — one of its main architects — contributes to gene regulation. We also touch on the emerging role of long noncoding RNAs in shaping chromatin organization and activity. The HOX gene clusters have been used as paradigm in the study of various biological pathways, and the overview we provide gives emphasis to what research on these loci has revealed about chromatin architecture and its regulation in the control of gene expression. [ABSTRACT FROM AUTHOR]
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- 2017
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30. COMPETING PROCESSES OF CLEAVAGE BOND BREAKING AND AMORPHISATION IN SILICON: MOLECULAR DYNAMICS STUDIES.
- Author
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GUO PENG, LUO YAN-WEI, WANG XUE-QING, and JIA YU
- Subjects
CRYSTALLOGRAPHY ,AMORPHIZATION ,MOLECULAR dynamics ,CRACK propagation (Fracture mechanics) ,ANALYTICAL mechanics - Abstract
This study investigates crystallographic orientations to exhibit fractures in silicon, such as those on the (100) plane cracks which travel along the [011] direction. Molecular dynamics simulations are performed to investigate the competing processes of cleavage bond-breaking and amorphisation under a uniaxial tensile load (mode I load) in the (100) [011] Si system. Notably, we observe two types of crack propagation behaviour: (1) downward step mechanism followed by small fracture steps on the alternating {111} plane and (2) zigzag propagation mechanism. Our simulations also show that local structural amorphisations of the lattice which act as the self-protecting mechanism of crack propagation contribute to the preservation of the crack on the {100} plane. [ABSTRACT FROM AUTHOR]
- Published
- 2016
31. Transcriptomic and proteomic analyses on the supercooling ability and mining of antifreeze proteins of the Chinese white wax scale insect.
- Author
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Yu, Shu‐Hui, Yang, Pu, Sun, Tao, Qi, Qian, Wang, Xue‐Qing, Chen, Xiao‐Ming, Feng, Ying, and Liu, Bo‐Wen
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CHINESE wax scale insect ,ANTIFREEZE protein analysis ,PROTEOMICS ,GENE ontology ,INSECT genomes ,INSECT proteins ,SUPERCOOLING - Abstract
The Chinese white wax scale insect, Ericerus pela, can survive at extremely low temperatures, and some overwintering individuals exhibit supercooling at temperatures below -30°C. To investigate the deep supercooling ability of E. pela, transcriptomic and proteomic analyses were performed to delineate the major gene and protein families responsible for the deep supercooling ability of overwintering females. Gene Ontology (GO) classification and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis indicated that genes involved in the mitogen-activated protein kinase, calcium, and PI3K-Akt signaling pathways and pathways associated with the biosynthesis of soluble sugars, sugar alcohols and free amino acids were dominant. Proteins responsible for low-temperature stress, such as cold acclimation proteins, glycerol biosynthesis-related enzymes and heat shock proteins (HSPs) were identified. However, no antifreeze proteins (AFPs) were identified through sequence similarity search methods. A random forest approach identified 388 putative AFPs in the proteome. The AFP gene ep-afp was expressed in Escherichia coli, and the expressed protein exhibited a thermal hysteresis activity of 0.97°C, suggesting its potential role in the deep supercooling ability of E. pela. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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32. Electronic and Magnetic Properties Modulated by Adsorption of 3 d Transition Metal Atoms in Monolayer and Bilayer MoS Sheets.
- Author
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Wang, Xue-Qing, Chen, Wei-Guang, Zhu, Zhi-Li, and Jia, Yu
- Published
- 2015
- Full Text
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33. Wound Healing: Tropoelastin Incorporation into a Dermal Regeneration Template Promotes Wound Angiogenesis (Adv. Healthcare Mater. 4/2015).
- Author
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Wang, Yiwei, Mithieux, Suzanne M., Kong, Yvonne, Wang, Xue‐Qing, Chong, Cassandra, Fathi, Ali, Dehghani, Fariba, Panas, Eleni, Kemnitzer, John, Daniels, Robert, Kimble, Roy M., Maitz, Peter K., Li, Zhe, and Weiss, Anthony S.
- Published
- 2015
- Full Text
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34. Effects of in-plane stiffness and charge transfer on thermal expansion of monolayer transition metal dichalcogenide.
- Author
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Wang Zhan-Yu, Wang Fei, Sun Qiang, Guo Zheng-Xiao, Jia Yu, Wang Xue-Qing, and Zhou Yan-Li
- Subjects
TRANSITION metal chalcogenides ,CHARGE transfer ,THERMAL expansion ,STIFFNESS (Engineering) ,MONOMOLECULAR films ,LATTICE constants ,GRUNEISEN constant - Abstract
The temperature dependence of lattice constants is studied by using first-principles calculations to determine the effects of in-plane stiffness and charge transfer on the thermal expansions of monolayer semiconducting transition metal dichalcogenides. Unlike the corresponding bulk material, our simulations show that monolayer MX
2 (M = Mo and W; X = S, Se, and Te) exhibits a negative thermal expansion at low temperatures, induced by the bending modes. The transition from contraction to expansion at higher temperatures is observed. Interestingly, the thermal expansion can be tailored regularly by alteration of the M or X atom. Detailed analysis shows that the positive thermal expansion coefficient is determined mainly by the in-plane stiffness, which can be expressed by a simple relationship. Essentially the regularity of this change can be attributed to the difference in charge transfer between the different elements. These findings should be applicable to other two-dimensional systems. [ABSTRACT FROM AUTHOR]- Published
- 2015
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35. Pulsed voltage deposited lead selenide thin film as efficient counter electrode for quantum-dot-sensitized solar cells.
- Author
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Jin, Bin Bin, Wang, Ye Feng, Wang, Xue Qing, and Zeng, Jing Hui
- Subjects
- *
SELENIDES , *SELENIUM compounds , *THIN films , *SOLID state electronics , *SURFACE coatings - Abstract
Lead selenide (PbSe) thin films were deposited on fluorine doped tin oxide (FTO) glass by a facile one-step pulse voltage electrodeposition method, and used as counter electrode (CE) in CdS/CdSe quantum dot-sensitized solar cells (QDSSCs). A power conversion efficiency of 4.67% is received for the CdS/CdSe co-sensitized solar cells, which is much better than that of 2.39% received using Pt CEs. The enhanced performance is attributed to the extended absorption in the near infrared region, superior electrocatalytic activity and p -type conductivity with a reflection of the incident light at the back electrode in addition. The physical and chemical properties were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), energy-dispersive spectroscopy (EDS), reflectance spectra, electrochemical impedance spectroscopy (EIS) and Tafel polarization measurements. The present work provides a facile pathway to an efficient CE in the QDSSCs. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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36. Semiconservative transmission of DNA N 6 -adenine methylation in a unicellular eukaryote.
- Author
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Sheng Y, Wang Y, Yang W, Wang XQ, Lu J, Pan B, Nan B, Liu Y, Ye F, Li C, Song J, Dou Y, Gao S, and Liu Y
- Subjects
- DNA Replication, DNA, Protozoan genetics, DNA, Protozoan metabolism, DNA Methylation, Tetrahymena thermophila genetics, Tetrahymena thermophila metabolism, Adenine metabolism, Adenine analogs & derivatives
- Abstract
Although DNA N
6 -adenine methylation (6mA) is best known in prokaryotes, its presence in eukaryotes has recently generated great interest. Biochemical and genetic evidence supports that AMT1, an MT-A70 family methyltransferase (MTase), is crucial for 6mA deposition in unicellular eukaryotes. Nonetheless, the 6mA transmission mechanism remains to be elucidated. Taking advantage of single-molecule real-time circular consensus sequencing (SMRT CCS), here we provide definitive evidence for semiconservative transmission of 6mA in Tetrahymena thermophila In wild-type (WT) cells, 6mA occurs at the self-complementary ApT dinucleotide, mostly in full methylation (full-6mApT); after DNA replication, hemi-methylation (hemi-6mApT) is transiently present on the parental strand, opposite to the daughter strand readily labeled by 5-bromo-2'-deoxyuridine (BrdU). In Δ AMT1 cells, 6mA predominantly occurs as hemi-6mApT. Hemi-to-full conversion in WT cells is fast, robust, and processive, whereas de novo methylation in Δ AMT1 cells is slow and sporadic. In Tetrahymena , regularly spaced 6mA clusters coincide with the linker DNA of nucleosomes arrayed in the gene body. Importantly, in vitro methylation of human chromatin by the reconstituted AMT1 complex recapitulates preferential targeting of hemi-6mApT sites in linker DNA, supporting AMT1's intrinsic and autonomous role in maintenance methylation. We conclude that 6mA is transmitted by a semiconservative mechanism: full-6mApT is split by DNA replication into hemi-6mApT, which is restored to full-6mApT by AMT1-dependent maintenance methylation. Our study dissects AMT1-dependent maintenance methylation and AMT1-independent de novo methylation, reveals a 6mA transmission pathway with a striking similarity to 5-methylcytosine (5mC) transmission at the CpG dinucleotide, and establishes 6mA as a bona fide eukaryotic epigenetic mark., (© 2024 Sheng et al.; Published by Cold Spring Harbor Laboratory Press.)- Published
- 2024
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37. Modification of Phosphorylation Sites in the Yeast Lysine Methyltransferase Set5 Exerts Influences on the Mitogen-Activated Protein Kinase Hog1 under Prolonged Acetic Acid Stress.
- Author
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Ye PL, Yuan B, Wang XQ, Zhang MM, and Zhao XQ
- Abstract
Responses to acetic acid toxicity in the budding yeast Saccharomyces cerevisiae have widespread implications in the biorefinery of lignocellulosic biomass and food preservation. Our previous studies revealed that Set5, the yeast lysine methyltransferase and histone H4 methyltransferase, was involved in acetic acid stress tolerance. However, it is still mysterious how Set5 functions and interacts with the known stress signaling network. Here, we revealed that elevated phosphorylation of Set5 during acetic acid stress is accompanied by enhanced expression of the mitogen-activated protein kinase (MAPK) Hog1. Further experiments uncovered that the phosphomimetic mutation of Set5 endowed yeast cells with improved growth and fermentation performance and altered transcription of specific stress-responsive genes. Intriguingly, Set5 was found to bind the coding region of HOG1 and regulate its transcription, along with increased expression and phosphorylation of Hog1. A protein-protein interaction between Set5 and Hog1 was also revealed. In addition, modification of Set5 phosphosites was shown to regulate reactive oxygen species (ROS) accumulation, which is known to affect yeast acetic acid stress tolerance. The findings in this study imply that Set5 may function together with the central kinase Hog1 to coordinate cell growth and metabolism in response to stress. IMPORTANCE Hog1 is the yeast homolog of p38 MAPK in mammals that is conserved across eukaryotes, and it plays crucial roles in stress tolerance, fungal pathogenesis, and disease treatments. Here, we provide evidence that modification of Set5 phosphorylation sites regulates the expression and phosphorylation of Hog1, which expands current knowledge on upstream regulation of the Hog1 stress signaling network. Set5 and its homologous proteins are present in humans and various eukaryotes. The newly identified effects of Set5 phosphorylation site modifications in this study benefit an in-depth understanding of eukaryotic stress signaling, as well as the treatment of human diseases.
- Published
- 2023
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38. Mutant NPM1 Hijacks Transcriptional Hubs to Maintain Pathogenic Gene Programs in Acute Myeloid Leukemia.
- Author
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Wang XQD, Fan D, Han Q, Liu Y, Miao H, Wang X, Li Q, Chen D, Gore H, Himadewi P, Pfeifer GP, Cierpicki T, Grembecka J, Su J, Chong S, Wan L, and Zhang X
- Subjects
- Humans, Nuclear Proteins genetics, Nuclear Proteins metabolism, Mutation, Chromatin genetics, Nucleophosmin, Leukemia, Myeloid, Acute drug therapy
- Abstract
Nucleophosmin (NPM1) is a ubiquitously expressed nucleolar protein with a wide range of biological functions. In 30% of acute myeloid leukemia (AML), the terminal exon of NPM1 is often found mutated, resulting in the addition of a nuclear export signal and a shift of the protein to the cytoplasm (NPM1c). AMLs carrying this mutation have aberrant expression of the HOXA/B genes, whose overexpression leads to leukemogenic transformation. Here, for the first time, we comprehensively prove that NPM1c binds to a subset of active gene promoters in NPM1c AMLs, including well-known leukemia-driving genes-HOXA/B cluster genes and MEIS1. NPM1c sustains the active transcription of key target genes by orchestrating a transcription hub and maintains the active chromatin landscape by inhibiting the activity of histone deacetylases. Together, these findings reveal the neomorphic function of NPM1c as a transcriptional amplifier for leukemic gene expression and open up new paradigms for therapeutic intervention., Significance: NPM1 mutation is the most common mutation in AML, yet the mechanism of how the mutant protein results in AML remains unclear. Here, for the first time, we prove mutant NPM1 directly binds to active chromatin regions and hijacks the transcription of AML-driving genes. See related article by Uckelmann et al., p. 746. This article is highlighted in the In This Issue feature, p. 517., (©2022 The Authors; Published by the American Association for Cancer Research.)
- Published
- 2023
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39. Profiling Chromatin Landscape at High Resolution and Throughput with 2C-ChIP.
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Wang XQD, Cameron CJF, Segal D, Paquette D, Blanchette M, and Dostie J
- Subjects
- Animals, Chromatin Immunoprecipitation, Epigenomics methods, Humans, Protein Processing, Post-Translational, Sequence Analysis, DNA, Chromatin metabolism, High-Throughput Nucleotide Sequencing methods
- Abstract
Chromatin immunoprecipitation (ChIP) is used to probe the presence of proteins and/or their posttranslational modifications on genomic DNA. This method is often used alongside chromosome conformation capture approaches to obtain a better-rounded view of the functional relationship between chromatin architecture and its landscape. Since the inception of ChIP, its protocol has been modified to improve speed, sensitivity, and specificity. Combining ChIP with deep sequencing has recently improved its throughput and made genome-wide profiling possible. However, genome-wide analysis is not always the best option, particularly when many samples are required to study a given genomic region or when quantitative data is desired. We recently developed carbon copy-ChIP (2C-ChIP), a new form of the high-throughput ChIP analysis method ideally suited for these types of studies. 2C-ChIP applies ligation-mediated amplification (LMA) followed by deep sequencing to quantitatively detect specified genomic regions in ChIP samples. Here, we describe the generation of 2C-ChIP libraries and computational processing of the resulting sequencing data.
- Published
- 2021
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40. Large DNA Methylation Nadirs Anchor Chromatin Loops Maintaining Hematopoietic Stem Cell Identity.
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Zhang X, Jeong M, Huang X, Wang XQ, Wang X, Zhou W, Shamim MS, Gore H, Himadewi P, Liu Y, Bochkov ID, Reyes J, Doty M, Huang YH, Jung H, Heikamp E, Aiden AP, Li W, Su J, Aiden EL, and Goodell MA
- Subjects
- CCCTC-Binding Factor genetics, CCCTC-Binding Factor metabolism, Cell Differentiation, Chromatin metabolism, Enhancer of Zeste Homolog 2 Protein genetics, Enhancer of Zeste Homolog 2 Protein metabolism, Epigenesis, Genetic, Gene Expression Regulation, Histones genetics, Histones metabolism, Homeodomain Proteins genetics, Humans, In Situ Hybridization, Fluorescence, Lysine genetics, Lysine metabolism, Nuclear Proteins genetics, SOXB1 Transcription Factors genetics, Short Stature Homeobox Protein genetics, Transcription Factors genetics, Chromatin chemistry, Chromatin genetics, DNA Methylation, Hematopoietic Stem Cells cytology, Hematopoietic Stem Cells physiology
- Abstract
Higher-order chromatin structure and DNA methylation are implicated in multiple developmental processes, but their relationship to cell state is unknown. Here, we find that large (>7.3 kb) DNA methylation nadirs (termed "grand canyons") can form long loops connecting anchor loci that may be dozens of megabases (Mb) apart, as well as inter-chromosomal links. The interacting loci cover a total of ∼3.5 Mb of the human genome. The strongest interactions are associated with repressive marks made by the Polycomb complex and are diminished upon EZH2 inhibitor treatment. The data are suggestive of the formation of these loops by interactions between repressive elements in the loci, forming a genomic subcompartment, rather than by cohesion/CTCF-mediated extrusion. Interestingly, unlike previously characterized subcompartments, these interactions are present only in particular cell types, such as stem and progenitor cells. Our work reveals that H3K27me3-marked large DNA methylation grand canyons represent a set of very-long-range loops associated with cellular identity., Competing Interests: Declaration of Interests The authors declare no competing interests., (Copyright © 2020 Elsevier Inc. All rights reserved.)
- Published
- 2020
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41. Dnmt3a loss and Idh2 neomorphic mutations mutually potentiate malignant hematopoiesis.
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Zhang X, Wang X, Wang XQD, Su J, Putluri N, Zhou T, Qu Y, Jeong M, Guzman A, Rosas C, Huang Y, Sreekumar A, Li W, and Goodell MA
- Subjects
- Animals, Cell Line, Cell Transformation, Neoplastic metabolism, Cell Transformation, Neoplastic pathology, Chromatin Immunoprecipitation Sequencing, DNA Methylation, DNA Methyltransferase 3A, Disease Models, Animal, Gene Expression Profiling, Genetic Association Studies methods, Genetic Predisposition to Disease, Histones metabolism, Humans, Metabolome, Metabolomics methods, Mice, Mice, Knockout, Cell Transformation, Neoplastic genetics, DNA (Cytosine-5-)-Methyltransferases genetics, Hematologic Neoplasms genetics, Hematopoiesis genetics, Isocitrate Dehydrogenase genetics, Mutation
- Abstract
Mutations in the epigenetic regulators DNMT3A and IDH1/2 co-occur in patients with acute myeloid leukemia and lymphoma. In this study, these 2 epigenetic mutations cooperated to induce leukemia. Leukemia-initiating cells from Dnmt3a-/- mice that express an IDH2 neomorphic mutant have a megakaryocyte-erythroid progenitor-like immunophenotype, activate a stem-cell-like gene signature, and repress differentiated progenitor genes. We observed an epigenomic dysregulation with the gain of repressive H3K9 trimethylation and loss of H3K9 acetylation in diseased mouse bone marrow hematopoietic stem and progenitor cells (HSPCs). HDAC inhibitors rapidly reversed the H3K9 methylation/acetylation imbalance in diseased mouse HSPCs while reducing the leukemia burden. In addition, using targeted metabolomic profiling for the first time in mouse leukemia models, we also showed that prostaglandin E2 is overproduced in double-mutant HSPCs, rendering them sensitive to prostaglandin synthesis inhibition. These data revealed that Dnmt3a and Idh2 mutations are synergistic events in leukemogenesis and that HSPCs carrying both mutations are sensitive to induced differentiation by the inhibition of both prostaglandin synthesis and HDAC, which may reveal new therapeutic opportunities for patients carrying IDH1/2 mutations., (© 2020 by The American Society of Hematology.)
- Published
- 2020
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42. Integrative analysis reveals key mRNAs and lncRNAs in monocytes of osteoporotic patients.
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Li L, Wang XQ, Liu XT, Guo R, and Zhang RD
- Subjects
- Autophagy, Bone Remodeling, Gene Expression Profiling, Homeostasis, Humans, Inflammation, Osteoblasts metabolism, Osteoclasts metabolism, Protein Interaction Mapping, Signal Transduction, Up-Regulation, Epigenesis, Genetic, Gene Expression Regulation, Monocytes metabolism, Osteoporosis metabolism, RNA, Long Noncoding metabolism, RNA, Messenger metabolism
- Abstract
Osteoporosis is the most common bone metabolic disease. Abnormal osteoclast formation and resorption play a fundamental role in osteoporosis pathogenesis. Recent researches have greatly broaden our understanding of molecular mechanisms of osteoporosis. However, the molecular mechanisms of key mRNAs and lncRNAs, and their interactions leading to osteoporosis are still not entirely clear. The purpose of this work is to study the key mRNAs and lncRNAs, and their interactions involved in bone mineral homeostasis and osteoclastogenesis. Systematic analyses such as differential expression analysis, GO and KEGG analysis, and PPI network construction revealed that up-regulated mRNAs were significantly enriched in inflammation-related pathways. Moreover, we observed that the down-regulated proteins, including JDP2, HADC4, HDAC5, CDYL2, ACADVL, ACSL1 and BRD4, were key components in the down-regulated PPI network, indicating that the downregulation of histone deacetylases and cofactors, such as, HDAC4, HDAC5 and JDP2 may be critical regulators in osteoclastogenesis. In addition, we also highlighted one lncRNA, RP11-498C9.17, was highly correlated with epigenetic regulators, such as HDAC4, MORF4L1, HMGA1 and DND1, indicating that the lncRNA RP11-498C9.17 may also be an epigenetic regulator. In conclusion, our integrative analysis reveals key mRNAs and lncRNAs, involved in bone mineral homeostasis and osteoclastogenesis, which not only broaden our insights into lncRNAs in bone mineral homeostasis and osteoclastogenesis, but also improve our understanding of molecular mechanism.
- Published
- 2019
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43. A Lethal Fungus Infects the Chinese White Wax Scale Insect and Causes Dramatic Changes in the Host Microbiota.
- Author
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Sun T, Wang XQ, Zhao ZL, Yu SH, Yang P, and Chen XM
- Subjects
- Animals, DNA, Ribosomal Spacer, Female, Metagenome, Metagenomics methods, RNA, Ribosomal, 16S, Fungi classification, Fungi genetics, Hemiptera microbiology, Host-Pathogen Interactions, Microbiota
- Abstract
The Chinese white wax scale insect (Ericerus pela) is an economically valuable species with an important role in wax production. Recently, in a greenhouse in Kunming, we identified a genus of fungus that infects and kills E. pela females. This study sought to perform the molecular detection of entomopathogens and analyze the changes in the host microbiota after entomopathogen infection. We used library construction, high-throughput sequencing and real-time quantitative polymerase chain reaction (RT-qPCR) to identify the fungi infecting adult E. pela, to understand the changes in the host organism, and to determine the distribution of the entomopathogens. Cladosporium langeronii and C. sphaerospermum were the main pathogenic species that infected the E. pela females, and they were most prevalent in the dorsal cuticle. In vivo, after infection, the proportion of Cladosporium clearly increased. The infection had little influence on the fungal community but had a strong influence on the bacterial community. After infection, Arsenophonus was dominant, and numerous bacterial genera disappeared. However, Rickettsia, instead of Arsenophonus, became dominant in the Cladosporium-infected individuals that had also been infected with Rickettsia. We identified the species that infected E. pela females and determined the influence of infection on the host microorganisms.
- Published
- 2018
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44. VRK1 promotes cisplatin resistance by up-regulating c-MYC via c-Jun activation and serves as a therapeutic target in esophageal squamous cell carcinoma.
- Author
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Liu ZC, Cao K, Xiao ZH, Qiao L, Wang XQ, Shang B, Jia Y, and Wang Z
- Abstract
Esophageal squamous cell carcinoma (ESCC) is a common malignant disease characterized by poor prognosis. Chemoresistance remains a major cause of ESCC relapse. Vaccinia-related kinase 1 (VRK1) has previously been identified as a cancer-related gene. However, there is little research demonstrating an association between VRK1 and ESCC. In this study, we show that VRK1 is overexpressed in ESCC primary tumor samples and cell lines. VRK1 expression was significantly correlated with clinical characteristics and predicted poor outcomes in ESCC patients. Functionally, knockdown of VRK1 inhibited ESCC cell proliferation, survival, migration and invasion; conversely, VRK1 overexpression produced the opposite effects. Furthermore, we found that up-regulation of VRK1 promoted cisplatin (CDDP) resistance in ESCC both in vitro and in vivo , whereas knockdown of VRK1 reduced this resistance. Further studies verified that VRK1 phosphorylated c-Jun and that the VRK1/c-Jun pathway contributed to CDDP resistance in ESCC. Mechanistically, a dual luciferase reporter assay revealed that c-Jun transcriptionally activated the expression of c-MYC. Silencing c-MYC abolished the c-Jun-mediated CDDP resistance of ESCC cells. A Kaplan-Meier analysis indicated that c-MYC is a potential prognostic factor in ESCC. Finally, luteolin, a VRK1 inhibitor, attenuated the malignant biological behaviors and CDDP resistance in ESCC cells. Collectively, we conclude that VRK1 promotes CDDP resistance through c-MYC by activating c-Jun and potentiating a malignant phenotype in ESCC. Our studies provide novel insight into the role of VRK1 in carcinogenesis and indicate that VRK1 can serve as a potential therapeutic target in ESCC., Competing Interests: CONFLICTS OF INTEREST The authors declare that they have no competing interests.
- Published
- 2017
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45. Pravastatin activates activator protein 2 alpha to augment the angiotensin II-induced abdominal aortic aneurysms.
- Author
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Ma H, Liang WJ, Shan MR, Wang XQ, Zhou SN, Chen Y, Guo T, Li P, Yu HY, Liu C, Yin YL, Wang YL, Dong B, Pang XY, and Wang SX
- Subjects
- Animals, Anticholesteremic Agents pharmacology, Aortic Aneurysm, Abdominal metabolism, Aortic Aneurysm, Abdominal pathology, Blotting, Western, Cells, Cultured, Disease Models, Animal, Humans, Male, Mice, Mice, Knockout, Myocytes, Smooth Muscle drug effects, Myocytes, Smooth Muscle metabolism, Myocytes, Smooth Muscle pathology, Phosphorylation, Signal Transduction, AMP-Activated Protein Kinases metabolism, Angiotensin II adverse effects, Aortic Aneurysm, Abdominal etiology, Apolipoproteins E physiology, Gene Expression Regulation drug effects, Pravastatin adverse effects, Transcription Factor AP-2 metabolism
- Abstract
We have previously reported that activation of AMP-activated kinase alpha 2 (AMPKα2) by nicotine or angiotensin II (AngII) instigates formation of abdominal aortic aneurysms (AAA) in Apoe-/- mice. Statins, used to treat hyperlipidemia widely, activate AMPK in vascular cells. We sought to examine the effects of pravastatin on AAA formation and uncover the molecular mechanism. The AAA model was induced by AngII and evaluated by incidence, elastin degradation, and maximal abdominal aortic diameter in Apoe-/- mice. The phosphorylated levels of AMPKα2 and activator protein 2 alpha (AP-2α) were examined in cultured vascular smooth muscle cells (VSMCs) or in mice. We observed that pravastatin (50 mg/kg/day, 8 weeks) remarkably increased the AngII-induced AAA incidence in mice. In VSMCs, pravastatin increased the levels of pAMPK, pAP-2α, and MMP2 in both basal and AngII-stressed conditions, which were abolished by tempol and compound C. Pravastatin-upregulated MMP2 was abrogated by AMPKα2 or AP-2α siRNA. Lentivirus-mediated gene silence of AMPKα2 or AP-2α abolished pravastatin-worsened AAA formations in AngII-infused Apoe-/- mice. Clinical investigations demonstrated that both AMPKα2 and AP-2α phosphorylations were increased in AAA patients or human subjects taking pravastatin. In conclusion, pravastatin promotes AAA formation through AMPKα2-dependent AP-2α activations.
- Published
- 2017
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46. Lovastatin upregulates microRNA-29b to reduce oxidative stress in rats with multiple cardiovascular risk factors.
- Author
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Wang F, Ma H, Liang WJ, Yang JJ, Wang XQ, Shan MR, Chen Y, Jia M, Yin YL, Sun XY, Zhang JN, Peng QS, Chen YG, Liu LY, Li P, Guo T, and Wang SX
- Subjects
- AMP-Activated Protein Kinases metabolism, Animals, Aorta drug effects, Aorta metabolism, Aorta physiopathology, Cardiovascular Diseases genetics, Cardiovascular Diseases metabolism, Cardiovascular Diseases pathology, Cells, Cultured, Diabetes Mellitus, Experimental genetics, Diabetes Mellitus, Experimental metabolism, Diabetes Mellitus, Experimental pathology, Dose-Response Relationship, Drug, Dyslipidemias genetics, Dyslipidemias metabolism, Dyslipidemias pathology, Human Umbilical Vein Endothelial Cells drug effects, Human Umbilical Vein Endothelial Cells metabolism, Humans, Hyperhomocysteinemia genetics, Hyperhomocysteinemia metabolism, Hyperhomocysteinemia pathology, MicroRNAs genetics, Nuclear Proteins genetics, Nuclear Proteins metabolism, Proteasome Endopeptidase Complex metabolism, RNA Interference, Signal Transduction drug effects, Time Factors, Transfection, Up-Regulation, Vasodilation drug effects, Antioxidants pharmacology, Cardiovascular Diseases prevention & control, Diabetes Mellitus, Experimental drug therapy, Dyslipidemias prevention & control, Hydroxymethylglutaryl-CoA Reductase Inhibitors pharmacology, Hyperhomocysteinemia drug therapy, Lovastatin pharmacology, MicroRNAs metabolism, Oxidative Stress drug effects
- Abstract
Aims: Proteasome-linked oxidative stress is believed to cause endothelial dysfunction, an early event in cardiovascular diseases (CVD). Statin, as HMG-CoA reductase inhibitor, prevents endothelial dysfunction in CVD. However, the molecular mechanism of statin-mediated normalization of endothelial function is not completely elucidated., Methods and Results: Lovastatin time/dose-dependently increased miR-29b expression and decreased proteasome activity in cultured human umbilical vein endothelial cells (HUVECs). Anti-miR-29b or overexpression of PA200 abolished lovastatin-induced inhibition of proteasome activity in HUVECs. In contrast, pre-miR-29b or PA200 siRNA mimics these effects of lovastatin on proteasome activity. Lovastatin inhibited oxidative stress induced by multiple oxidants including ox-LDL, H2O2, TNFα, homocysteine thiolactone (HTL), and high glucose (HG), which were reversed by inhibition of miR-29b in HUVECs. Ex vivo analysis indicated that lovastatin normalized the acetylcholine-induced endothelium-dependent relaxation and the redox status in isolated rat aortic arteries exposure to multiple cardiovascular risk factors. In vivo analysis revealed that administration of lovastatin remarkably suppressed oxidative stress and prevented endothelial dysfunction in rats with hyperglycemia, dyslipidemia, and hyperhomocysteinemia, as well as increased miR-29b expressions, reduced PA200 protein levels, and suppression of proteasome activity in aortic tissues., Conclusion: Upregulation of miR-29b expression is a common mechanism contributing to endothelial dysfunction induced by multiple cardiovascular risk factors through PA200-dependent proteasome-mediated oxidative stress, which is prevented by lovastatin.
- Published
- 2017
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47. [The integrity study on PEG-PCL micelles transcellular transported across MDCK epithelial cell monolayer using FRET technology].
- Author
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Li R, Song XN, Zhang H, Dai WB, He B, Zheng Y, Zhang Q, and Wang XQ
- Subjects
- Animals, Biological Transport, Caproates, Dogs, Humans, Isothiocyanates, Lactones, Madin Darby Canine Kidney Cells, Particle Size, Polyesters, Polyethylene Glycols, Drug Carriers chemistry, Fluorescence Resonance Energy Transfer, Micelles
- Abstract
The integrity of poly(ethylene glycol)-co-poly(ε-caprolactone) (PEG-PCL) micelles transcellular transported across madin-darby canine kidney(MDCK) epithelial cells was investigated. Fluorescein isothiocyanate isomer I(FITC) was conjugated to PEG-PCL and the product PEG-PCL-FITC was identified by fluorescence spectra. Two micelles were prepared using the thin-film hydration method: 3,3’-dioctadecyloxacarbocyanine perchlorate (DiO) and 1,1’-dioctadecyl-3,3,3’,3’-tetramethylindocarbocyanine perchlorate (DiI) co-loaded PEG-PCL micelles (DiO-DiI-M), DiI loaded and PEG-PCL-FITC contained micelles(FITC-DiI-M). The size of the micelles was characterized by dynamic light scattering analysis using a Malvern Zetasizer Nano ZS and it turned out that the particle sizes of both micelles were about 30 nm with identical polydispersity index(PDI). The stability of the micelles in phosphate buffer saline(PBS) was monitored using fluorescence spectra and both micelles were stable within 4 h in PBS. The integrity of PEG-PCL micelles in the transcellular process across MDCK epithelial cell monolayer at 1 and 4 h was investigated using laser confocal scanning microscope and Förster resonance energy transfer(FRET) technology. The Person’s coefficient and FRET efficiency of both Transwell layer and Receive layer were recorded. The results show that the FRET efficiency and Person’s coefficient of the Receive layer was consistent with that of Transwell layer for both the micelles at 1 h, but decreased at 4 h and FITC-DiI-M decreased more significantly than Di O-DiI-M. The results indicated that the micelles could transport across the MDCK monolayer intactly at 1 h but some of them were disassembled during the 4 h transportation process.
- Published
- 2016
48. Identification and evaluation of reference genes in the Chinese white wax scale insect Ericerus pela.
- Author
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Yu SH, Yang P, Sun T, Qi Q, Wang XQ, Xu DL, and Chen XM
- Abstract
Background: The Chinese white wax scale insect, Ericerus pela, is a well-known resource insect. The females and males are dramatically distinct at each developmental stage. We sought to identify suitable reference genes to use as internal controls in molecular research on E. plea., Results: geNorm, RefFinder and Normfinder analyses showed that ßTub-2 was the best reference gene throughout different developmental stages; SdhA-1 was the most stable reference gene in different tissues, and ßTub-1 was the most reliable reference gene under treatment with different temperatures. The results also showed that the optimal number of reference genes for analyzing target gene expression levels in the three experimental conditions was two., Conclusions: The identified reference genes are suitable reference genes for normalization in RT-qPCR of E. pela samples.
- Published
- 2016
- Full Text
- View/download PDF
49. Mutations in pre-core and basic core promoter regions of hepatitis B virus in chronic hepatitis B patients.
- Author
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Wang XL, Ren JP, Wang XQ, Wang XH, Yang SF, and Xiong Y
- Subjects
- Adult, Chi-Square Distribution, DNA Mutational Analysis methods, Female, Genotype, Hepatitis B Core Antigens, Hepatitis B e Antigens blood, Hepatitis B virus immunology, Hepatitis B, Chronic blood, Hepatitis B, Chronic diagnosis, Humans, Liver Function Tests, Male, Middle Aged, Polymerase Chain Reaction methods, Young Adult, DNA, Viral genetics, Hepatitis B virus genetics, Hepatitis B, Chronic virology, Mutation, Promoter Regions, Genetic, Viral Core Proteins genetics
- Abstract
Aim: To investigate the frequency of mutations in pre-core (pre-C) and basic core promoter (BCP) regions of hepatitis B virus (HBV) from Shanxi Province, and the association between mutations and disease related indexes., Methods: One hundred chronic hepatitis B patients treated at Shanxi Province Hospital of Traditional Chinese Medicine were included in this study. PCR-reverse dot blot hybridization and mismatch amplification mutation assay (MAMA)-PCR were used to detect the mutations in the HBV pre-C and BCP regions. HBV DNA content and liver function were compared between patients with mutant HBV pre-C and BCP loci and those with wild-type loci. The consistency between PCR-reverse dot blot hybridization and MAMA-PCR for detecting mutations in the HBV pre-C and BCP regions was assessed., Results: Of the 100 serum samples detected, 9.38% had single mutations in the pre-C region, 29.17% had single mutations in the BCP region, 41.67% had mutations in both BCP and pre-C regions, and 19.79% had wild-type loci. The rates of BCP and pre-C mutations were 65.7% and 34.3%, respectively, in hepatitis B e antigen (HBeAg) positive patients, and 84.6% and 96.2%, respectively, in HBeAg negative patients. The rate of pre-C mutations was significantly higher in HBeAg negative patients than in HBeAg positive patients (χ (2) = 26.62, P = 0.00), but there was no significant difference in the distribution of mutations in the BCP region between HBeAg positive and negative patients (χ (2) = 2.43, P = 0.12). The presence of mutations in the pre-C (Wilcoxon W = 1802.5, P = 0.00) and BCP regions (Wilcoxon W = 2906.5, P = 0.00) was more common in patients with low HBV DNA content. Both AST and GGT were significantly higher in patients with mutant pre-C and BCP loci than in those with wild-type loci (P < 0.05). PCR-reverse dot blot hybridization and MAMA-PCR for detection of mutations in the BCP and pre-C regions had good consistency, and the Kappa values obtained were 0.91 and 0.58, respectively., Conclusion: HBeAg negative patients tend to have HBV pre-C mutations. However, these mutations do not cause increased DNA copies, but associate with damage of liver function.
- Published
- 2016
- Full Text
- View/download PDF
50. [Mechanism and clinical progress of molecular targeted cancer therapy].
- Author
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Hu HX, Wang XQ, Zhang H, and Zhang Q
- Subjects
- Angiogenesis Inhibitors, Antibodies, Monoclonal, Drug Delivery Systems, ErbB Receptors antagonists & inhibitors, Humans, Protein Kinase Inhibitors, Molecular Targeted Therapy, Neoplasms drug therapy
- Abstract
Molecular target-based cancer therapy is playing a more and more important role in cancer therapy because of its high specificity, good tolerance and so on. There are different kinds of molecular targeted drugs such as monoclonal antibodies and small molecular kinase inhibitors, and more than 50 drugs have been approved since 1997. When the first monoclonal antibody, rituximab, was on the market. The development of molecular target-based cancer therapeutics has become the main approach. Based on this, we summarized the drugs approved by FDA and introduced their mechanism of actions and clinical applications. In order to incorporate most molecular targeted drugs and describe clearly various characteristics, we divided them into four categories: drugs related to EGFR, drugs related to antiangiogenesis, drugs related to specific antigen and other targeted drugs. The purpose of this review is to provide a current status of this field and discover the main problems in the molecular targeted therapy.
- Published
- 2015
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