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Peng X, Jia X, Shang G, Xue M, Jiang M, Chen D, Zhang F, Hu Y. The generation and characterization of a transgenic zebrafish line with lens-specific Cre expression. Mol Vis 2024; 30:123-136. [PMID: 38601019 PMCID: PMC11006009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 03/17/2024] [Indexed: 04/12/2024] Open
Abstract
Purpose Danio rerio zebrafish constitute a popular model for studying lens development and congenital cataracts. However, the specific deletion of a gene with a Cre/LoxP system in the zebrafish lens is unavailable because of the lack of a lens-Cre-transgenic zebrafish. This study aimed to generate a transgenic zebrafish line in which Cre recombinase was specifically expressed in the lens. Methods The pTol2 cryaa:Cre-polyA-cryaa:EGFP (enhanced green fluorescent protein) plasmid was constructed and co-injected with Tol2-transposase into one-to-two-cell-stage wild-type (WT) zebrafish embryos. Whole-mount in situ hybridization (ISH), tissue section, hematoxylin and eosin staining, a Western blot, a split-lamp observation, and a grid transmission assay were used to analyze the Cre expression, lens structure, and lens transparency of the transgenic zebrafish. Results In this study, we generated a transgenic zebrafish line, zTg(cryaa:Cre-cryaa:EGFP), in which Cre recombinase and EGFP were driven by the lens-specific cryaa promoter. zTg(cryaa:Cre-cryaa:EGFP) began to express Cre and EGFP specifically in the lens at the 22 hpf stage, and this ectopic Cre could efficiently and specifically delete the red fluorescent protein (RFP) signal from the lens when zTg(cryaa:Cre-cryaa:EGFP) embryos were injected with the loxP-flanked RFP plasmid. The overexpression of Cre and EGFP did not impair zebrafish development or lens transparency. Accordingly, this zTg(cryaa:Cre-cryaa:EGFP) zebrafish line is a useful tool for gene editing, specifically with zebrafish lenses. Conclusions We established a zTg(cryaa:Cre-cryaa:EGFP) zebrafish line that can specifically express an active Cre recombinase in lens tissues. This transgenic zebrafish line can be used as a tool to specifically manipulate a gene in zebrafish lenses.
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Affiliation(s)
- Xuyan Peng
- The Laboratory of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zheng Zhou, China
| | - Xiaolin Jia
- The Laboratory of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zheng Zhou, China
| | - Guohui Shang
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Zhengzhou University, Zheng Zhou, China
| | - Mengjiao Xue
- The Laboratory of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zheng Zhou, China
| | - Mingjun Jiang
- The Laboratory of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zheng Zhou, China
| | - Dandan Chen
- The Laboratory of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zheng Zhou, China
| | - Fengyan Zhang
- The Laboratory of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zheng Zhou, China
| | - Yanzhong Hu
- The Laboratory of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zheng Zhou, China
- Joint National Laboratory for Antibody Drug Engineering, Henan University School of Basic Medical Sciences. Kaifeng, China
- Kaifeng Key Lab for Cataract and Myopia, Institute of Eye Disease, Kaifeng Central Hospital, Kaifeng, China
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Shang G, Yang M, Li M, Ma L, Liu Y, Ma J, Chen Y, Wang X, Fan S, Xie M, Wu W, Dai S, Chen Z. Structural Basis of Nucleic Acid Recognition and 6mA Demethylation by Caenorhabditis elegans NMAD-1A. Int J Mol Sci 2024; 25:686. [PMID: 38255759 PMCID: PMC10815869 DOI: 10.3390/ijms25020686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 12/30/2023] [Accepted: 12/31/2023] [Indexed: 01/24/2024] Open
Abstract
N6-methyladenine (6mA) of DNA is an emerging epigenetic mark in the genomes of Chlamydomonas, Caenorhabditis elegans, and mammals recently. Levels of 6mA undergo drastic fluctuation and thus affect fertility during meiosis and early embryogenesis. Here, we showed three complex structures of 6mA demethylase C. elegans NMAD-1A, a canonical isoform of NMAD-1 (F09F7.7). Biochemical results revealed that NMAD-1A prefers 6mA Bubble or Bulge DNAs. Structural studies of NMAD-1A revealed an unexpected "stretch-out" conformation of its Flip2 region, a conserved element that is usually bent over the catalytic center to facilitate substrate base flipping in other DNA demethylases. Moreover, the wide channel between the Flip1 and Flip2 of the NMAD-1A explained the observed preference of NMAD-1A for unpairing substrates, of which the flipped 6mA was primed for catalysis. Structural analysis and mutagenesis studies confirmed that key elements such as carboxy-terminal domain (CTD) and hypothetical zinc finger domain (ZFD) critically contributed to structural integrity, catalytic activity, and nucleosome binding. Collectively, our biochemical and structural studies suggest that NMAD-1A prefers to regulate 6mA in the unpairing regions and is thus possibly associated with dynamic chromosome regulation and meiosis regulation.
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Affiliation(s)
- Guohui Shang
- State Key Laboratory of Animal Biotech Breeding and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Meiting Yang
- State Key Laboratory of Animal Biotech Breeding and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Min Li
- National Protein Science Facility, Tsinghua University, Beijing 100084, China
| | - Lulu Ma
- State Key Laboratory of Animal Biotech Breeding and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Yunlong Liu
- School of Life Sciences, Tiangong University, Tianjin 300387, China
| | - Jun Ma
- State Key Laboratory of Animal Biotech Breeding and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Yiyun Chen
- Department of Biochemistry, University of Colorado, Boulder, CO 80303, USA
| | - Xue Wang
- State Key Laboratory of Animal Biotech Breeding and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Shilong Fan
- National Protein Science Facility, Tsinghua University, Beijing 100084, China
| | - Mengjia Xie
- State Key Laboratory of Animal Biotech Breeding and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Wei Wu
- State Key Laboratory of Animal Biotech Breeding and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Shaodong Dai
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Zhongzhou Chen
- State Key Laboratory of Animal Biotech Breeding and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing 100193, China
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Zhang Y, Peng X, Xue M, Liu J, Shang G, Jiang M, Chen D, Liu B, Wang Y, Jia X, Xu J, Zhang F, Hu Y. SARS-COV-2 spike protein promotes RPE cell senescence via the ROS/P53/P21 pathway. Biogerontology 2023; 24:813-827. [PMID: 36738354 PMCID: PMC9898700 DOI: 10.1007/s10522-023-10019-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 01/20/2023] [Indexed: 02/05/2023]
Abstract
SARS-Cov-2 infection, which has caused the COVID-19 global pandemic, triggers cellular senescence. In this study, we investigate the role of the SARS-COV-2 spike protein (S-protein) in regulating the senescence of RPE cells. The results showed that administration or overexpression of S-protein in ARPE-19 decreased cell proliferation with cell cycle arrest at the G1 phase. S-protein increased SA-β-Gal positive ARPE-19 cells with high expression of P53 and P21, senescence-associated inflammatory factors (e.g., IL-1β, IL-6, IL-8, ICAM, and VEGF), and ROS. Elimination of ROS by N-acetyl cysteine (NAC) or knocking down p21 by siRNA diminished S-protein-induced ARPE cell senescence. Both administrated and overexpressed S-protein colocalize with the ER and upregulate ER-stress-associated BIP, CHOP, ATF3, and ATF6 expression. S-protein induced P65 protein nuclear translocation. Inhibition of NF-κB by bay-11-7082 reduced S-protein-mediated expression of senescence-associated factors. Moreover, the intravitreal injection of S-protein upregulates senescence-associated inflammatory factors in the zebrafish retina. In conclusions, the S-protein of SARS-Cov-2 induces cellular senescence of ARPE-19 cells in vitro and the expression of senescence-associated cytokines in zebrafish retina in vivo likely by activating ER stress, ROS, and NF-κb. These results may uncover a potential association between SARS-cov-2 infection and development of AMD.
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Affiliation(s)
- Yuhang Zhang
- The Laboratory of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xuyan Peng
- The Laboratory of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Mengjiao Xue
- The Laboratory of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Jingjing Liu
- The Laboratory of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Guohui Shang
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Mingjun Jiang
- The Laboratory of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Dandan Chen
- The Laboratory of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Baixue Liu
- The Laboratory of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yuxuan Wang
- The Laboratory of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xiaolin Jia
- The Laboratory of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Jianqing Xu
- Chongqing Institutes for Life Science Innovation; Clinical Center for Bio-Therapy, Zhongshan Hospital & Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
| | - Fengyan Zhang
- The Laboratory of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, No.1 Long-Hu-Zhong Huan Road, Zhengzhou, China.
| | - Yanzhong Hu
- The Laboratory of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
- Joint National Laboratory for Antibody Drug Engineering, The First Affiliated Hospital of Henan University, Kaifeng, China.
- Kaifeng Key Lab for Cataract and Myopia, Institute of Eye Disease, Kaifeng Central Hospital, Kaifeng, China.
- Department of Cell Biology and Genetics, School of Medicine, Henan University, Jin-Ming Road, Kaifeng, 475014, China.
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Chen DD, Liu B, Wang Y, Jiang M, Shang G, Xue M, Jia X, Lang Y, Zhou G, Zhang F, Peng X, Hu Y. The downregulation of HSP90-controlled CRALBP expression is associated with age-related vision attenuation. FASEB J 2023; 37:e22832. [PMID: 36826429 DOI: 10.1096/fj.202201608rr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 02/01/2023] [Accepted: 02/09/2023] [Indexed: 02/25/2023]
Abstract
The dysfunction of CRALBP, a key regulator of the visual cycle, is associated with retinitis punctata albescens characterized by night vision loss and retinal degeneration. In this paper, we find that the expression of CRALBP is regulated by heat shock protein 90 (HSP90). Inhibition of HSP90α or HSP90β expression by using the CRISPR-Cas9 technology downregulates CRALBP's mRNA and protein expression in ARPE-19 cells by triggering the degradation of transcription factor SP1 in the ubiquitin-proteasome pathway. SP1 can bind to CRALBP's promoter, and inhibition of SP1 by its inhibitor plicamycin or siRNA downregulates CRALBP's mRNA expression. In the zebrafish, inhibition of HSP90 by the intraperitoneal injection of IPI504 reduces the thickness of the retinal outer nuclear layer and Rlbp1b mRNA expression. Interestingly, the expression of HSP90, SP1, and CRALBP is correlatedly downregulated in the senescent ARPE-19 and Pig primary RPE cells in vitro and in the aged zebrafish and mouse retinal tissues in vivo. The aged mice exhibit the low night adaption activity. Taken together, these data indicate that the HSP90-SP1 is a novel regulatory axis of CRALBP transcriptional expression in RPE cells. The age-mediated downregulation of the HSP90-SP1-CRALBP axis is a potential etiology for the night vision reduction in senior people.
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Affiliation(s)
- Dan-Dan Chen
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Baixue Liu
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Yuxuan Wang
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Mingjun Jiang
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Guohui Shang
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Mengjiao Xue
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Xiaolin Jia
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - YouFei Lang
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Guiling Zhou
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Fengyan Zhang
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Xuyan Peng
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Yanzhong Hu
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China.,The Jointed National Laboratory of Antibody Drug Engineering, The First Affiliated Hospital of Henan University, Henan University, Kaifeng, China
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5
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Yang M, Li X, Tian Z, Ma L, Ma J, Liu Y, Shang G, Liang A, Wu W, Chen Z. Structures of MPND Reveal the Molecular Recognition of Nucleosomes. Int J Mol Sci 2023; 24:ijms24043368. [PMID: 36834777 PMCID: PMC9963953 DOI: 10.3390/ijms24043368] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 02/02/2023] [Accepted: 02/06/2023] [Indexed: 02/10/2023] Open
Abstract
Adenine N6 methylation in DNA (6mA) is a well-known epigenetic modification in bacteria, phages, and eukaryotes. Recent research has identified the Mpr1/Pad1 N-terminal (MPN) domain-containing protein (MPND) as a sensor protein that may recognize DNA 6mA modification in eukaryotes. However, the structural details of MPND and the molecular mechanism of their interaction remain unknown. Herein, we report the first crystal structures of the apo-MPND and MPND-DNA complex at resolutions of 2.06 Å and 2.47 Å, respectively. In solution, the assemblies of both apo-MPND and MPND-DNA are dynamic. In addition, MPND was found to possess the ability to bind directly to histones, no matter the N-terminal restriction enzyme-adenine methylase-associated domain or the C-terminal MPN domain. Moreover, the DNA and the two acidic regions of MPND synergistically enhance the interaction between MPND and histones. Therefore, our findings provide the first structural information regarding the MPND-DNA complex and also provide evidence of MPND-nucleosome interactions, thereby laying the foundation for further studies on gene control and transcriptional regulation.
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Liu Y, Ma L, Li M, Tian Z, Yang M, Wu X, Wang X, Shang G, Xie M, Chen Y, Liu X, Jiang L, Wu W, Xu C, Xia L, Li G, Dai S, Chen Z. Structures of human TR4LBD-JAZF1 and TR4DBD-DNA complexes reveal the molecular basis of transcriptional regulation. Nucleic Acids Res 2023; 51:1443-1457. [PMID: 36651297 PMCID: PMC9943680 DOI: 10.1093/nar/gkac1259] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 11/30/2022] [Accepted: 01/11/2023] [Indexed: 01/19/2023] Open
Abstract
Testicular nuclear receptor 4 (TR4) modulates the transcriptional activation of genes and plays important roles in many diseases. The regulation of TR4 on target genes involves direct interactions with DNA molecules via the DNA-binding domain (DBD) and recruitment of coregulators by the ligand-binding domain (LBD). However, their regulatory mechanisms are unclear. Here, we report high-resolution crystal structures of TR4DBD, TR4DBD-DNA complexes and the TR4LBD-JAZF1 complex. For DNA recognition, multiple factors come into play, and a specific mutual selectivity between TR4 and target genes is found. The coactivators SRC-1 and CREBBP can bind at the interface of TR4 originally occupied by the TR4 activation function region 2 (AF-2); however, JAZF1 suppresses the binding through a novel mechanism. JAZF1 binds to an unidentified surface of TR4 and stabilizes an α13 helix never reported in the nuclear receptor family. Moreover, the cancer-associated mutations affect the interactions and the transcriptional activation of TR4 in vitro and in vivo, respectively. Overall, our results highlight the crucial role of DNA recognition and a novel mechanism of how JAZF1 reinforces the autorepressed conformation and influences the transcriptional activation of TR4, laying out important structural bases for drug design for a variety of diseases, including diabetes and cancers.
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Affiliation(s)
- Yunlong Liu
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Lulu Ma
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Min Li
- National Protein Science Facility, Tsinghua University, Beijing 100084, China
| | - Zizi Tian
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Meiting Yang
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Xi Wu
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Xue Wang
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Guohui Shang
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Mengjia Xie
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Yiyun Chen
- Department of Biochemistry, University of Colorado, Boulder, CO 80303, USA
| | - Xin Liu
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Lun Jiang
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Wei Wu
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Chaoqun Xu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicines, Ministry of Education, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100193, China
| | - Liqun Xia
- Department of Urology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310016, China
| | - Gonghui Li
- Department of Urology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310016, China
| | - Shaodong Dai
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Zhongzhou Chen
- To whom correspondence should be addressed. Tel: +86 10 62734078; Fax: +86 10 62734078;
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Liu Y, Shang G, Zhang X, Liu F, Zhang C, Li Z, Jia J, Xu Y, Zhang Z, Yang S, Zhou B, Luan Y, Huang Y, Peng Y, Han T, He Y, Zheng H. CAMTA1 gene affects the ischemia-reperfusion injury by regulating CCND1. Front Cell Neurosci 2022; 16:868291. [PMID: 36159397 PMCID: PMC9500443 DOI: 10.3389/fncel.2022.868291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 06/20/2022] [Indexed: 11/13/2022] Open
Abstract
Epigenetic modulations lead to changes in gene expression, including DNA methylation, histone modifications, and noncoding RNAs. In recent years, epigenetic modifications have been related to the pathogenesis of different types of cancer, cardiovascular disease, and other diseases. Emerging evidence indicates that DNA methylation could be associated with ischemic stroke (IS) and plays a role in pathological progression, but the underlying mechanism has not yet been fully understood. In this study, we used human methylation 850K BeadChip to analyze the differences in gene methylation status in the peripheral blood samples from two groups (3 IS patients vs. 3 healthy controls). According to their bioinformatics profiling, we found 278 genes with significantly different methylation levels. Seven genes with the most significant methylation modifications were validated in two expanded groups (100 IS patients vs. 100 healthy controls). The CAMTA1 gene had significantly different methylation changes in patients compared to the controls. To understand the CAMTA1 function in stroke, we generated CAMTA1 knockout in SH-SY5Y cells. RNA seq results in CAMTA1 knockout cells revealed the pathways and gene set enrichments involved in cellular proliferation and cell cycle. Furthermore, a series of experiments demonstrated that in the oxygen-glucose deprivation/re-oxygenation (OGD/R) model system, the expression of cyclin D1, an essential regulator of cell cycle progression, was increased in SH-SY5Y CAMTA1 KO cells. Increasing evidence demonstrated that ischemic stress could inappropriately raise cyclin D1 levels in mature neurons. However, the molecular signals leading to an increased cyclin D1 level are unclear. Our findings demonstrate for the first time that the CAMTA1 gene could regulate cyclin D1 expression and implicate their role in strokes.
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Affiliation(s)
- Yang Liu
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Guohui Shang
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Xuran Zhang
- Department of Clinical Laboratory, The First Affiliated Hospital of Henan University of CM, Henan University of CM, Zhengzhou, China
| | - Fuyong Liu
- Department of Pathogenic Biology and Immunology, School of Life Sciences, Sanquan College of Xinxiang Medical University, Xinxiang, China
| | - Chi Zhang
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Zhihao Li
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Jing Jia
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Yan Xu
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Zhaojing Zhang
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Shangdong Yang
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Baixue Zhou
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Yingying Luan
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Yanyang Huang
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Yue Peng
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Tianyi Han
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Ying He
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
- Ying He
| | - Hong Zheng
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
- *Correspondence: Hong Zheng
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Ma L, Lu H, Tian Z, Yang M, Ma J, Shang G, Liu Y, Xie M, Wang G, Wu W, Zhang Z, Dai S, Chen Z. Structural insights into the interactions and epigenetic functions of human nucleic acid repair protein ALKBH6. J Biol Chem 2022; 298:101671. [PMID: 35120926 PMCID: PMC8892091 DOI: 10.1016/j.jbc.2022.101671] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 01/25/2022] [Accepted: 01/27/2022] [Indexed: 12/03/2022] Open
Abstract
Human AlkB homolog 6, ALKBH6, plays key roles in nucleic acid damage repair and tumor therapy. However, no precise structural and functional information are available for this protein. In this study, we determined atomic resolution crystal structures of human holo-ALKBH6 and its complex with ligands. AlkB members bind nucleic acids by NRLs (nucleotide recognition lids, also called Flips), which can recognize DNA/RNA and flip methylated lesions. We found that ALKBH6 has unusual Flip1 and Flip2 domains, distinct from other AlkB family members both in sequence and conformation. Moreover, we show that its unique Flip3 domain has multiple unreported functions, such as discriminating against double-stranded nucleic acids, blocking the active center, binding other proteins, and in suppressing tumor growth. Structural analyses and substrate screening reveal how ALKBH6 discriminates between different types of nucleic acids and may also function as a nucleic acid demethylase. Structure-based interacting partner screening not only uncovered an unidentified interaction of transcription repressor ZMYND11 and ALKBH6 in tumor suppression but also revealed cross talk between histone modification and nucleic acid modification in epigenetic regulation. Taken together, these results shed light on the molecular mechanism underlying ALKBH6-associated nucleic acid damage repair and tumor therapy.
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Affiliation(s)
- Lulu Ma
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Hongyun Lu
- School of food and health, Beijing Technology and Business University, No. 11, Fucheng Road, Haidian District, Beijing, 100048, China
| | - Zizi Tian
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Meiting Yang
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Jun Ma
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Guohui Shang
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Yunlong Liu
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Mengjia Xie
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Guoguo Wang
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Wei Wu
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Ziding Zhang
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Shaodong Dai
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, United States
| | - Zhongzhou Chen
- State Key Laboratory of Agrobiotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing, 100193, China.
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9
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Chen DD, Peng X, Wang Y, Jiang M, Xue M, Shang G, Liu X, Jia X, Liu B, Lu Y, Mu H, Zhang F, Hu Y. HSP90 acts as a senomorphic target in senescent retinal pigmental epithelial cells. Aging (Albany NY) 2021; 13:21547-21570. [PMID: 34495872 PMCID: PMC8457597 DOI: 10.18632/aging.203496] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 08/14/2021] [Indexed: 01/09/2023]
Abstract
The senescence of retinal pigment epithelial (RPE) cells is associated with age-related macular degeneration (AMD), a leading cause of blindness in the world. HSP90 is a predominant chaperone that regulates cellular homeostasis under divergent physio-pathological conditions including senescence. However, the role of HSP90 in senescent RPE cells still remains unclear. Here, we reported that HSP90 acts as a senomorphic target of senescent RPE cells in vitro. Using H2O2-induced senescent ARPE-19 cells and replicative senescent primary RPE cells from rhesus monkey, we found that HSP90 upregulates the expression of IKKα, and HIF1α in senescent ARPE-19 cells and subsequently controls the induction of distinct senescence-associated inflammatory factors. Senescent ARPE-19 cells are more resistant to the cytotoxic HSP90 inhibitor IPI504 (IC50 = 36.78 μM) when compared to normal ARPE-19 cells (IC50 = 6.16 μM). Administration of IPI504 at 0.5–5 μM can significantly inhibit the induction of IL-1β, IL-6, IL-8, MCP-1 and VEGFA in senescent ARPE-19 and the senescence-mediated migration of retinal capillary endothelial cells in vitro. In addition, we found that inhibition of HSP90 by IPI504 reduces SA-β-Gal’s protein expression and enzyme activity in a dose-dependent manner. HSP90 interacts with and regulates SA-β-Gal protein stabilization in senescent ARPE-19 cells. Taken together, these results suggest that HSP90 regulates the SASP and SA-β-Gal activity in senescent RPE cells through associating with distinctive mechanism including NF-κB, HIF1α and lysosomal SA-β-Gal. HSP90 inhibitors (e.g. IPI504) could be a promising senomorphic drug candidate for AMD intervention.
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Affiliation(s)
- Dan-Dan Chen
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Xuyan Peng
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Yuxuan Wang
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Mingjun Jiang
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Mengjiao Xue
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Guohui Shang
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Zhengzhou University, Henan 450001, China
| | - Xuhui Liu
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Xiaolin Jia
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Baixue Liu
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Yingwei Lu
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Hongmei Mu
- Kaifeng Key laboratory of Cataracts and Myopia, Eye Disease Institute, Kaifeng Central Hospital, Kaifeng, China
| | - Fengyan Zhang
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Yanzhong Hu
- The Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China.,The jointed National Laboratory of Antibody Drug Engineering, Department of Cell Biology and Genetics, The College of Basic Medical Science of Henan University, Kaifeng, China.,Kaifeng Key laboratory of Cataracts and Myopia, Eye Disease Institute, Kaifeng Central Hospital, Kaifeng, China
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10
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Batlevi CL, Salles G, Tilly H, Chaidos A, McKay P, Phillips T, Assouline S, Campbell P, Ribrag V, Damaj GL, Dickinson M, Jurczak W, Kaźmierczak M, Opat S, Radford JR, Schmitt A, Rajarethinam A, Shang G, Morschhauser F. CHARACTERISTICS OF PATIENTS ACHIEVING COMPLETE OR PARTIAL RESPONSE (CR/PR) WITH TAZEMETOSTAT (TAZ) IN WILD‐TYPE RELAPSED/REFRACTORY (R/R) FOLLICULAR LYMPHOMA (FL). Hematol Oncol 2021. [DOI: 10.1002/hon.21_2880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- C. L. Batlevi
- Memorial Sloan Kettering Cancer Center Lymphoma Service Department of Medicine New York USA
| | - G. Salles
- Lyon‐Sud Hospital University of Lyon Hematology Pierre‐Bénite France
| | - H. Tilly
- Centre Henri Becquerel and Rouen University Department of Haematology and INSERM U1245 Rouen France
| | - A. Chaidos
- Imperial College Healthcare NHS Trust Hammersmith Hospital Department of Medicine London UK
| | - P. McKay
- Beatson West of Scotland Cancer Centre Department of Hematology Glasgow UK
| | - T. Phillips
- University of Michigan Hematology and Oncology Ann Arbor USA
| | - S. Assouline
- Division of Hematology Sir Mortimer B. Davis‐Jewish General Hospital Oncology Montreal Canada
| | - P. Campbell
- Barwon Health University Hospital Geelong Department of Clinical Haematology Geelong Australia
| | - V. Ribrag
- Gustave Roussy Hematology Villejuif France
| | - G. Laurent Damaj
- Hematology Institute University Hospital School of Medicine Hematology Caen France
| | - M. Dickinson
- Peter MacCallum Cancer Centre Royal Melbourne Hospital Department of Clinical Haematology Melbourne Australia
| | - W. Jurczak
- Maria Sklodowska‐Curie National Research Institute of Oncology Department of Hematology Kraków Poland
| | - M. Kaźmierczak
- Poznań University of Medical Sciences Department of Hematology and Bone Marrow Transplantation Poznań Poland
| | - S. Opat
- Monash University Department of Haematology Victoria Australia
| | - J. R. Radford
- University of Manchester NIHR Manchester Clinical Research Facility Manchester Academic Health Science Centre The Christie NHS Foundation Trust Department of Medical Oncology Manchester UK
| | - A. Schmitt
- Institut Bergonié Department of Hematology Bordeaux France
| | | | - G. Shang
- Epizyme, Inc. Medical Affairs Cambridge USA
| | - F. Morschhauser
- Groupe de Recherche sur les formes Injectables et les Technologies Associées CHU de Lille Université de Lille Oncology Lille France
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11
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Shi C, Lu Y, Zhai G, Huang J, Shang G, Lou Q, Li D, Jin X, He J, Du Z, Gui J, Yin Z. Hyperandrogenism in POMCa-deficient zebrafish enhances somatic growth without increasing adiposity. J Mol Cell Biol 2020; 12:291-304. [PMID: 31237951 PMCID: PMC7232124 DOI: 10.1093/jmcb/mjz053] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 03/17/2019] [Accepted: 05/17/2019] [Indexed: 01/29/2023] Open
Abstract
The endocrine regulatory roles of the hypothalamic-pituitary-adrenocortical axis on anxiety-like behavior and metabolic status have been found throughout animal taxa. However, the precise effects of the balancing adrenal corticosteroid biosynthesis under the influence of adrenocorticotrophic hormone (ACTH), a pro-opiomelanocortin (POMC)-derived peptide, on animal energy expenditure and somatic growth remain unknown. POMC has also been identified as one of the candidate loci for polycystic ovary syndrome, which features hyperandrogenism and some prevalence of obesity in patients. Here we show that zebrafish lacking functional POMCa exhibit similar phenotypes of stress response and body weight gain but not obesity as observed in mammalian models. In contrast with the impaired anorexigenic signaling cascade of melanocyte-stimulating hormones and leptin, which are responsible for their obesity-prone weight gain observed in various pomc mutant mammals, analyses with our pomca mutant series indicate that ACTH is the key regulator for the phenotype with enhanced somatic growth without obesity in pomca-deficient zebrafish. Hypocortisolism associated with hyperandrogenism has been observed in the pomca-deficient zebrafish, with enhanced activation of mammalian target of rapamycin complex 1; reutilization of amino acids and fatty acid β-oxidation are observed in the muscle tissue of the pomca-deficient fish. After reducing hyperandrogenism by crossing our pomca mutant fish with a cyp17a1-deficient background, the phenotype of enhanced somatic growth in pomca-deficient fish was no longer observed. Thus, our work also demonstrated that the role of POMCa in stress response seems to be conserved in vertebrates, whereas its effect on adipostasis is unique to teleosts.
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Affiliation(s)
- Chuang Shi
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yao Lu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Gang Zhai
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Jianfei Huang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guohui Shang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qiyong Lou
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Dongliang Li
- School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Xia Jin
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Jiangyan He
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Zhenyu Du
- School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Jianfang Gui
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Zhan Yin
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
- The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing 100864, China
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12
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Chi Y, Yao Y, Fang Z, Wang S, Huang G, Cai Q, Shang G, Wang G, Qu G, Wu Q, Jiang Y, Song J, Chen J, Zhu X, Cai Z, Bai C, Lu Y, Yu Z, Shen J, Cai J. Efficacy and safety of anlotinib in advanced leiomyosarcoma: Subgroup analysis of a phase IIB trial (ALTER0203). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz283.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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13
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Fang Z, Yao Y, Cai J, Chi Y, Wang S, Huang G, Cai Q, Shang G, Wang G, Qu G, Wu Q, Jiang Y, Song J, Chen J, Cai Z, Zhu X, Bai C, Lu Y, Yu Z, Shen J. The effect of treatment line on the efficacy of anlotinib hydrochloride in advanced alveolar soft part sarcoma patients. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz283.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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14
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Shang G, Peng X, Ji C, Zhai G, Ruan Y, Lou Q, Jin X, He J, Wang H, Yin Z. Steroidogenic acute regulatory protein and luteinizing hormone are required for normal ovarian steroidogenesis and oocyte maturation in zebrafish†. Biol Reprod 2019; 101:760-770. [DOI: 10.1093/biolre/ioz132] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 06/18/2019] [Accepted: 07/18/2019] [Indexed: 01/03/2023] Open
Abstract
Abstract
In recent studies, luteinizing hormone (LH) was reported to play important roles in oocyte maturation. However, the mechanism by which LH signaling, especially regarding the steroidogenesis process, affects oocyte maturation has not been clarified. In this study, zebrafish models with a functional deficiency in luteinizing hormone beta (Lhb) or steroidogenic acute regulatory protein (Star), an enzyme that promotes the transport of cholesterol into the inner mitochondrial membrane for maturation-induced hormone (MIH) production, were generated using transcription activator-like effector nucleases (TALENs). Similar phenotypes of the maturation-arrested oocytes in both female mutants have been observed. The levels of MIH in the oocytes of the female mutants were clearly decreased in both the lhb and star knockout zebrafish. The expression of star was dramatically down-regulated in the lhb mutant follicles and was clearly promoted by forskolin and hCG in vitro. Furthermore, treatment with the MIH precursors, pregnenolone or progesterone, as well as with MIH itself rescued the maturation-arrested oocyte phenotypes in both lhb and star mutants. The plasma levels of other steroids, including testosterone, estradiol, and cortisol, were not affected in the lhb mutants, while the levels of gonad hormones testosterone and estradiol were significantly increased in the star mutants. The cortisol levels were decreased in the star mutants. Collectively, our results confirm that LH plays important roles in the initiation of MIH synthesis from cholesterol and maintains oocyte maturation in zebrafish, as well as provide evidence that Star might act downstream of LH signaling in steroidogenesis.
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Affiliation(s)
- Guohui Shang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, P.R. China
| | - Xuyan Peng
- Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Henan Province Eye Hospital, Henan International Joint Research Laboratory for Ocular Immunology and Retinal Injury Repair, Zhengzhou, Henan, P.R. China
| | - Cheng Ji
- Center for Circadian Clocks, Soochow University, Suzhou, Jiangsu, P.R. China
- Department of Genetics, School of Biology and Basic Medical Sciences, Medical College, Soochow University, Suzhou, Jiangsu, P.R. China
| | - Gang Zhai
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, P.R. China
| | - Yonglin Ruan
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, P.R. China
- Institute of Hydrobiology, University of Chinese Academy of Sciences, Beijing, P. R. China
| | - Qiyong Lou
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, P.R. China
| | - Xia Jin
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, P.R. China
| | - Jiangyan He
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, P.R. China
| | - Han Wang
- Center for Circadian Clocks, Soochow University, Suzhou, Jiangsu, P.R. China
- Department of Genetics, School of Biology and Basic Medical Sciences, Medical College, Soochow University, Suzhou, Jiangsu, P.R. China
| | - Zhan Yin
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, P.R. China
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15
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Zhai G, Shu T, Xia Y, Lu Y, Shang G, Jin X, He J, Nie P, Yin Z. Characterization of Sexual Trait Development in cyp17a1-Deficient Zebrafish. Endocrinology 2018; 159:3549-3562. [PMID: 30202919 DOI: 10.1210/en.2018-00551] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 08/30/2018] [Indexed: 12/16/2022]
Abstract
Cytochrome P450 (Cyp)17A1 has both 17α-hydroxylase and 17,20-lyase activities, which are involved in the steroidogenic pathway that produces androgens and estrogens. Previously, a phenotype of all-male cyp17a1-deficient zebrafish generated by transcription activatorlike effector nuclease has been reported. In the current study, the mechanisms relating to Cyp17a1 that are involved in the development of sexual traits, especially gonadal differentiation and testicular development, were characterized. We found that the cyp17a1-deficient fish at 3 months postfertilization (mpf) were all fertile males with normal testis and spermatogenesis but compromised male-typical mating behaviors and secondary sex characters (SSCs), including breeding tubercles, body pigmentation, and anal fin coloration. These results demonstrate that spermatogenesis and testicular development are not as susceptible to androgen deficiency compared with the formation of male-typical SSCs and mating behaviors in zebrafish. The differentiation of the juvenile ovary into the mature ovary failed during the critical sexual differentiation stage. This all-male phenotype of the cyp17a1-deficient fish could be restored with testosterone or estradiol treatment. For testicular development in cyp17a1-deficient fish, a gradually increasing number of spermatozoa and testis hypertrophy from 3 to 6 mpf were observed, accompanied by constitutively upregulated pituitary gonadotropin FSH subunit β (fshβ). The hypertrophic testis and enhanced spermatogenesis in the cyp17a1-deficient fish at 6 mpf could be effectively rescued by fshβ depletion. These results confirm that adequate estrogen is essential for maintaining ovarian differentiation, and they provide new insight into the role of FSHβ in male testicular development and spermatogenesis.
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Affiliation(s)
- Gang Zhai
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Tingting Shu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yuguo Xia
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - Yao Lu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Guohui Shang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Xia Jin
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Jiangyan He
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Pin Nie
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Zhan Yin
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
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16
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Fang Z, Chi Y, Yao Y, Wang S, Huang G, Cai Q, Shang G, Wang G, Qu G, Wu Q, Jiang Y, Song J, Chen J, Zhu X, Cai Z, Bai C, Lu Y, Yu Z, Shen J, Cai J. Evaluation of hypertension and hand-foot syndrome as markers of anlotinib efficacy in advanced soft tissue sarcoma. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy299.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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17
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Yao Y, Chi Y, Fang Z, Wang S, Huang G, Cai Q, Shang G, Wang G, Qu G, Wu Q, Jiang Y, Song J, Chen J, Zhu X, Cai Z, Bai C, Lu Y, Yu Z, Shen J, Cai J. Efficacy of anlotinib in advanced soft tissue sarcoma by prior lines of therapy, age and dose modification. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy299.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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18
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Bi Z, Cai W, Wang Y, Shang G. Direct manipulation of metallic nanosheets by shear force microscopy. J Microsc 2018; 271:222-229. [PMID: 29762874 DOI: 10.1111/jmi.12710] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 03/28/2018] [Accepted: 04/26/2018] [Indexed: 11/28/2022]
Abstract
Micro/nanomanipulation is a rapidly growing technology and holds promising applications in various fields, including photonic/electronic devices, chemical/biosensors etc. In this work, we present that shear force microscopy (ShFM) can be exploited to manipulate metallic nanosheets besides imaging. The manipulation is realized via controlling the shear force sensor probe position and shear force magnitude based on our homemade ShFM system under an optical microscopy for in situ observation. The main feature of the ShFM system is usage of a piezoelectric bimorph sensor, which has the ability of self-excitation and detection. Moreover, the shear force magnitude as a function of the spring constant of the sensor and setpoint is obtained, which indicates that operation modes can be switched between imaging and manipulation through designing the spring constant before experiment and changing the setpoint during manipulation process, respectively. We believe that this alternative manipulation technique could be used to assemble other nanostructures with different shapes, sizes and compositions for new properties and wider applications.
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Affiliation(s)
- Z Bi
- Department of Applied Physics, Key Laboratory of Micro-Nano Measurement-Manipulation and Physics (Ministry of Education), Beihang University, Beijing, People's Republic of China
| | - W Cai
- Department of Applied Physics, Key Laboratory of Micro-Nano Measurement-Manipulation and Physics (Ministry of Education), Beihang University, Beijing, People's Republic of China
| | - Y Wang
- Department of Applied Physics, Key Laboratory of Micro-Nano Measurement-Manipulation and Physics (Ministry of Education), Beihang University, Beijing, People's Republic of China
| | - G Shang
- Department of Applied Physics, Key Laboratory of Micro-Nano Measurement-Manipulation and Physics (Ministry of Education), Beihang University, Beijing, People's Republic of China
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19
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Li X, Chen Y, Wang L, Shang G, Zhang C, Zhao Z, Zhang H, Liu A. Quercetin alleviates pulmonary angiogenesis in a rat model of hepatopulmonary syndrome. ACTA ACUST UNITED AC 2017; 49:S0100-879X2016000700606. [PMID: 27383124 PMCID: PMC4942229 DOI: 10.1590/1414-431x20165326] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 04/29/2016] [Indexed: 01/15/2023]
Abstract
Quercetin shows protective effects against hepatopulmonary syndrome (HPS), as demonstrated in a rat model. However, whether these effects involve pulmonary vascular angiogenesis in HPS remains unclear. Therefore, this study aimed to assess the effect of quercetin on pulmonary vascular angiogenesis and explore the underlying mechanisms. Male Sprague-Dawley rats weighing 200-250 g underwent sham operation or common bile duct ligation (CBDL). Two weeks after surgery, HIF-1α and NFκB levels were assessed in rat lung tissue by immunohistochemistry and western blot. Then, CBDL and sham-operated rats were further divided into 2 subgroups each to receive intraperitoneal administration of quercetin (50 mg/kg daily) or 0.2% Tween for two weeks: Sham (Sham+Tween; n=8), CBDL (CBDL+Tween; n=8), Q (Sham+quercetin; n=8), and CBDL+Q (CBDL+quercetin; n=8). After treatment, lung tissue specimens were assessed for protein (immunohistochemistry and western blot) and/or gene expression (quantitative real-time PCR) levels of relevant disease markers, including VEGFA, VEGFR2, Akt/p-Akt, HIF-1α, vWf, and IκB/p-IκB. Finally, arterial blood was analyzed for alveolar arterial oxygen pressure gradient (AaPO2). Two weeks after CBDL, HIF-1α expression in the lung decreased, but was gradually restored at four weeks. Treatment with quercetin did not significantly alter HIF-1α levels, but did reduce AaPO2 as well as lung tissue NF-κB activity, VEGFA gene and protein levels, Akt activity, and angiogenesis. Although hypoxia is an important feature in HPS, our findings suggest that HIF-1α was not the main cause for the VEGFA increase. Interestingly, quercetin inhibited pulmonary vascular angiogenesis in rats with HPS, with involvement of Akt/NF-κB and VEGFA/VEGFR-2 pathways.
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Affiliation(s)
- X Li
- Department of Physiology, Changzhi Medical College, Changzhi, China
| | - Y Chen
- Department of Microbiology, Changzhi Medical College, Changzhi, China
| | - L Wang
- Functional Laboratory of Changzhi Medical College, Changzhi, China
| | - G Shang
- Department of Physiology, Changzhi Medical College, Changzhi, China
| | - C Zhang
- Department of Physiology, Changzhi Medical College, Changzhi, China
| | - Z Zhao
- Liver Disease Institute of Changzhi Medical College, Changzhi, China
| | - H Zhang
- Department of Physiology, Changzhi Medical College, Changzhi, China
| | - A Liu
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
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Tao J, Liu W, Shang G, Zheng Y, Huang J, Lin R, Chen L. MiR-207/352 regulate lysosomal-associated membrane proteins and enzymes following ischemic stroke. Neuroscience 2015; 305:1-14. [PMID: 26232047 DOI: 10.1016/j.neuroscience.2015.07.064] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2015] [Revised: 07/21/2015] [Accepted: 07/24/2015] [Indexed: 11/16/2022]
Abstract
The role of microRNAs (miRNAs) in lysosome-mediated neuronal death and survival following ischemic stroke remains unknown. Herein, using miRNA and mRNA gene expression profiling microarrays, we identified the differentially expressed 24 miRNAs and 494 genes in the cortical peri-infarct area, respectively. Integrating the miRNA targets and mRNA expression profiles, we found 47 genes of miRNA targets, including lysosomal-associated membrane protein 2 (LAMP2), Hexb, Bcl2, etc. MiR-207 and miR-352 were mainly downregulated after ischemic stroke, followed by a slight return to baseline during post-middle cerebral artery occlusion (MCAO) 1d to 7d. Furthermore, the luciferase reporter assay demonstrated that LAMP2 and Hexb were the direct targets of miR-207 and miR-352, respectively. After lateral ventricle injection with miR-207 agonist mimics, the neurological deficit scores and infarct volumes were attenuated, and the structure of mitochondria ridges was improved. In addition, miR-207 mimics could reduce the number of cellular lysosome and autophagosome, whereas increase the number of autophagic vacuoles, indicating miR-207 might affect the latter part of lysosomal-autophagy pathway and mitochondria-induced apoptosis. These results suggested that miR-207 and miR-352 were involved in lysosomal pathway for mediating ischemic injury and spontaneous recovery. MiR-207 mimics as potential target drugs could protect against autophagic cell death after ischemic stroke.
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Affiliation(s)
- J Tao
- College of Rehabilitation Medicine & TCM Rehabilitation Research Center Of SATCM, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, PR China
| | - W Liu
- College of Rehabilitation Medicine & TCM Rehabilitation Research Center Of SATCM, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, PR China
| | - G Shang
- Fujian Rehabilitation Tech Co-innovation Center (2011 Project), Fujian University of Traditional Chinese Medicine, Fuzhou 350122, PR China
| | - Y Zheng
- Fujian Rehabilitation Tech Co-innovation Center (2011 Project), Fujian University of Traditional Chinese Medicine, Fuzhou 350122, PR China
| | - J Huang
- Fujian Rehabilitation Engineering Research Center & Fujian Key Lab of Motor Function Rehabilitation, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, PR China
| | - R Lin
- Fujian Rehabilitation Tech Co-innovation Center (2011 Project), Fujian University of Traditional Chinese Medicine, Fuzhou 350122, PR China
| | - L Chen
- College of Rehabilitation Medicine & TCM Rehabilitation Research Center Of SATCM, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, PR China.
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Li D, Lou Q, Zhai G, Peng X, Cheng X, Dai X, Zhuo Z, Shang G, Jin X, Chen X, Han D, He J, Yin Z. Hyperplasia and cellularity changes in IGF-1-overexpressing skeletal muscle of crucian carp. Endocrinology 2014; 155:2199-212. [PMID: 24617525 DOI: 10.1210/en.2013-1938] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The zebrafish skeletal muscle-specific promoter mylz2 was used to cause crucian carp overexpression of the zebrafish IGF-1 cDNA. In stable transgenic germline F1 progenies, a 5-fold increase in the level of IGF-1 in skeletal muscle was observed. Evident skeletal muscle hyperplasia was observed in the transgenic fish through histologic analysis. By analyzing the RNA sequencing transcriptome of the skeletal muscle of IGF-1 transgenic fish and nontransgenic control fish at 15 months of age, 10 966 transcripts with significant expression levels were identified with definite gene descriptions based on the corresponding zebrafish genome information. Based on the results of our RNA sequencing transcriptome profiling analysis and the results of the real-time quantitative PCR analysis performed to confirm the skeletal muscle transcriptomics analysis, several pathways, including IGF-1 signaling, aerobic metabolism, and protein degradation, were found to be activated in the IGF-1-overexpressing transgenic fish. Intriguingly, our transcriptional expression and protein assays indicated that the overexpression of IGF-1 stimulated a significant shift in the myofiber type toward a more oxidative slow muscle type. Although the body weight was surprisingly decreased by IGF-1 transgenic expression, significantly higher oxygen consumption rates were measured in IGF-1-overexpressing transgenic fish compared with their nontransgenic control fish. These results indicate that the sustained overexpression of IGF-1 in crucian carp skeletal muscle promotes myofiber hyperplasia and cellularity changes, which elicit alterations in the body energy metabolism and skeletal muscle growth.
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Affiliation(s)
- Dongliang Li
- Key Laboratory of Aquatic Biodiversity and Conservation of the Chinese Academy of Sciences (D.L., Q.L., G.Z., X.P., X.C., X.D., Z.Z., G.S., X.J., X.C., D.H., J.H., Z.Y.), Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei, China; and University of Chinese Academy of Sciences (D.L., G.Z., X.P., X.C., X.D., Z.Z., G.S.), Beijing, China
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Xue J, Zhao H, Shang G, Zou R, Dai Z, Zhou D, Huang Q, Xu Y. RIP140 is associated with subclinical inflammation in type 2 diabetic patients. Exp Clin Endocrinol Diabetes 2012; 121:37-42. [PMID: 22956256 DOI: 10.1055/s-0032-1323683] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
AIMS To evaluate the expression level of RIP140 (receptor interaction protein 140) and its correlation with inflammatory cytokine production and free fatty acids (FFAs) in type 2 diabetes. METHODS Plasma and peripheral blood mononuclear cells (PBMCs) were collected from 24 diabetic and 30 healthy individuals. The levels of FFAs, TC, TG, HDL-C, LDL-C, FIN, and FBG were measured. The insulin resistance index was calculated using the homeostasis model assessment (HOMA). Additionally, PBMCs from control group were cultured alone or with 500 μmol/L palmitic acid (PA). Levels of RIP140 TNF-α, and IL-6 in PBMCs were analyzed using real-time RT-PCR, Western blots and ELISA. The relationship between RIP140 and other variables was performed using SPSS 11.5 software. RESULTS TG, LDL-C, FIN, FBG, HOMA, and HDL-C were significantly different between diabetic patients and the control group. Levels of RIP140, TNF-α, and IL-6 were higher in the diabetic group compared to control. RIP140 expression was positively correlated with FFAs, HDL-c, TNF-α, IL-6, FIN, FBG, and HOMA. Finally, 500 μmol/L PA treatment increased RIP140 expression and the secretion of inflammatory cytokines in cultured control PBMCs. CONCLUSIONS Increased RIP140 level may be closely associated with inflammation and disorder of lipid and glucose metabolism in diabetic patients.
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Affiliation(s)
- J Xue
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Wuhan, China
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Abstract
BACKGROUND AND OBJECTIVES There is little data on the duration of viraemia following infection with Ross River virus (RRV), the most common cause of arbovirus disease in Australia. In particular, no accurate estimate exists for the duration of pre-symptomatic RRV infection, which is important in assessing the potential for transfusion transmission. MATERIALS AND METHODS We used an established mouse model of RRV infection involving adult Swiss outbred mice to measure viraemia following infection. Applying our experimental data to a published probabilistic model for estimating the risk of dengue transmission by transfused blood, we derived comparable risk estimates for RRV. RESULTS Ross River virus RNA was measured using highly sensitive real-time PCR in serum samples to determine the duration of asymptomatic viraemia, which typically lasted 5 days, but extended to 9 days in some mice. Assuming the potential for transfusion transmission is proven, the risk of RRV transmission by blood during a 2004 outbreak in Cairns, Australia was retrospectively estimated as 1 in 13,542 (range from 1 in 4765 to 47,563). CONCLUSION This study provides updated epidemiological data useful to underpin modelling to assess the potential risk of transfusion-transmitted RRV. Using an established model for dengue, the risk estimate for RRV transmission is comparable in the same geographical region. Should transfusion be proven as a route of transmission, this supports consideration of appropriate mitigation strategies to safeguard blood recipients.
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Affiliation(s)
- G Shang
- Virus and Inflammation Research Group, Faculty of Applied Science, University of Canberra, ACT, Australia
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Shang G, Wang JA, Liu Y, Li YP, Gan YQ, Zhu XL, Dai ZZ. [Advances in the study of thermal environmental conditions and health in China]. Wei Sheng Yan Jiu 2001; 30:383-4. [PMID: 12561629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
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Shang G, Dai J, Wang Y. Construction of a stable bioengineered strain of biotechmycin. Chin J Biotechnol 2000; 15:105-11. [PMID: 10719630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
A stable bioengineered strain of Biotechmycin (Streptomyces spiramyceticus WSJ-1) was constructed by integrating the 4"-isovaleryltransferase gene (ist) through homologous recombination into the chromosome of spiramycin-producing strain S.spiramyceticus F21. In this construction, a Streptomyces/E.coli shuttle plasmid pKC1139 (AmR) was used as the vector and tsr gene was inserted as the marker for selection of homologous recombination. This constructed strain, S.spiramyceticus WSJ-1, was genetically very stable in production titer and in the production of biotechmycin as well as in carrying tsr selective marker when grown without pressure. The fermentation of S.spiramyceticus WSJ-1 was also improved compared with the original strain harboring unintegrated plasmid. Southern hybridization confirmed the integrated status of the ist gene in the host genome.
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Affiliation(s)
- G Shang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences, Beijing, China
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Shang G, Jiang Y, Tang H, Fan Y, Wang S, Dong G, Wang J. [Determination of glutamine in intestinal mucosa by pre-column derivatization/reversed-phase high performance liquid chromatography with fluorescence detection]. Se Pu 1997; 15:474-6. [PMID: 15739325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023] Open
Abstract
A high performance liquid chromatographic pre-column derivatization method with fluorescence detection for the analysis of glutamine (Gln) in rat intestinal mucosa is presented. Gln was derivatized with o-phthalaldehyde and 3-mercaptopropionic acid under an alkaline condition and separated by reversed-phase liquid chromatography on a Lichrosorb RP18 column (150 mm x 4.6 mm i.d., 5 microm). The mobile phase was consisted of 50 mmol/L phosphate buffer (pH 7.0)-acetonitrile (94:6, V/V) with a flow rate of 2.0 mL/min. The excited and emitted wavelength were selected at 230 nm and 389 nm respectively. The volume ratio of samples and derivatization reagent solution was 4:1 (V/V). The detection limit of Gln was 25 micromol/L (S/N= 3.5) and the regression equation was A = 16.9405C + 179.9339, r = 0.9996 at the linear range of 50-3200 micromol/L. The day-to-day deviation was 6.97% (n = 3) and the retention time of Gln was 3.158 min. This method is rapid, simple and highly sensitive, and has been applied to the determination of Gln in intestinal mucosa.
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Affiliation(s)
- G Shang
- Clinical Pharmacology Laboratory of Xijing Hospital, Fourth Military Medical University , Xi'an, 710032
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Abstract
Immunohistochemical methods were used to search for Fas receptor/Fas ligand system involvement in multiple sclerosis (MS) white matter brain lesions. We found large numbers of Fas ligand (Fas-L)-bearing cells present in two acute lesions and 12 of 16 chronic MS lesions, and very few positive cells in non-inflammatory controls. Four of six brains from non-MS neuropathologic conditions associated with inflammation and white matter disease were, however, also positive for Fas-L. Double staining with cell-specific markers revealed that the pattern of ligand-positive cells in chronic MS lesions was complex and composed of several different cell types which were primarily resident glial cells with a small overlay of macrophages. Fas/APO 1 (CD95) receptor expression in MS tissue was also evaluated and marked upregulation of the receptor was found. In addition, Fas receptor was induced, but to a lesser extent, in numerous control brains. The observations that TUNEL-positive dying cells were present in MS lesions and showed excellent co-localization with Fas-L, indicate that the Fas death system may contribute to plaque pathogenesis and could lead to the development of a new category of therapeutic agents for MS.
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Affiliation(s)
- P Dowling
- Neurology Service, Department of Veterans Affairs Medical Center, East Orange, New Jersey 07018, USA
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Huang Z, Li Z, Zhao D, Hu X, Peng M, Liu X, Shang G, Cui X. [Identification of head skeleton of 10 snake drugs]. Zhongguo Zhong Yao Za Zhi 1990; 15:517-20, 575. [PMID: 2092709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Z Huang
- Faculty of Pharmacy, Hebei Medical College, Shijiazhuang
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