本研究选用Meta分析的方法对HLA-G基因3'UTR的2个多态位点14 bp I/D和+3142G/C多态性与类风湿关节炎(rheumatoid arthritis,RA)发病的相关性进行系统评价,以探究RA发病遗传背景的循证医学证据。全面检索PubMed、中国知网、万方数据...本研究选用Meta分析的方法对HLA-G基因3'UTR的2个多态位点14 bp I/D和+3142G/C多态性与类风湿关节炎(rheumatoid arthritis,RA)发病的相关性进行系统评价,以探究RA发病遗传背景的循证医学证据。全面检索PubMed、中国知网、万方数据库中HLA-G基因14 bp I/D和+3142G/C与RA关系的病例对照研究,最终纳入符合要求的文献7篇,研究数据包括病例组1411例、对照组1526例。使用RevMan 5.3软件对筛选出的符合要求的文献进行Meta分析。结果显示,HLA-G基因14 bp I/D与RA发病不相关,+3142G/C隐性纯合突变与RA发病相关(GG vs GC+CC:OR=1.34,95%CI 1.09~1.65,P=0.006)。根据人种进行亚组分析,发现HLA-G基因14 bp I/D与南美洲人群、高加索人群和东亚人群的RA发病均不相关,+3142G/C隐性纯合突变与高加索人群的RA发病相关(GG vs GC+CC:OR=1.35,95%CI 1.06~1.71,P=0.01)。该研究提示,HLA-G基因+3142G/C隐性纯合突变可能是RA发病的危险因素,且与人种有关;HLA-G基因14 bp I/D尚不能认为与RA发病有关联。展开更多
In order to investigate whether the non-classi- cal HLA-G classⅠmolecule protects the porcine endothelial cells (PECs) from the lysis mediated by human immune cells in pig to human discordant xenotransplantation, we ...In order to investigate whether the non-classi- cal HLA-G classⅠmolecule protects the porcine endothelial cells (PECs) from the lysis mediated by human immune cells in pig to human discordant xenotransplantation, we have cloned HLA-G cDNA from a human placenta by RT-PCR. Mammalian expression vector, pEFG-neo, was constructed by insertion of HLA-G cDNA in pEF-neo. We obtained effi-ciently expressed PECs by stable transfection. Cytotoxicity assay showed that overexpression of HLA-G on PECs was sufficient to inhibit human NK-92 cell lysis. The level of lysis was equal to or less than that of the lysis of human umbilical vein endothelial cells mediated by human NK-92 cells. It also indicated that HLA-G inhibited the lysis of PECs mediated by xeno-antigen specific T lymphocytes. The reduction of lysis ranged between 59.1% and 88.9%. These findings sug-gest that the transgenic approach to overexpress HLA-G is believed to be a new immunotherapy in overcoming the im-mune rejections in xenotransplantion, including delayed xenograft rejection and cell-mediated rejection.展开更多
基金National Natural Science Foundation of China(81941001)Natural Science Foundation of Guangdong Province,China(2019A1515110283)+1 种基金Science and Technology Planning Project of Jiangmen,Guangdong Province,China(2021030101220004887)Science Foundation for Young Faculty of Wuyi University(2019TD05)。
文摘本研究选用Meta分析的方法对HLA-G基因3'UTR的2个多态位点14 bp I/D和+3142G/C多态性与类风湿关节炎(rheumatoid arthritis,RA)发病的相关性进行系统评价,以探究RA发病遗传背景的循证医学证据。全面检索PubMed、中国知网、万方数据库中HLA-G基因14 bp I/D和+3142G/C与RA关系的病例对照研究,最终纳入符合要求的文献7篇,研究数据包括病例组1411例、对照组1526例。使用RevMan 5.3软件对筛选出的符合要求的文献进行Meta分析。结果显示,HLA-G基因14 bp I/D与RA发病不相关,+3142G/C隐性纯合突变与RA发病相关(GG vs GC+CC:OR=1.34,95%CI 1.09~1.65,P=0.006)。根据人种进行亚组分析,发现HLA-G基因14 bp I/D与南美洲人群、高加索人群和东亚人群的RA发病均不相关,+3142G/C隐性纯合突变与高加索人群的RA发病相关(GG vs GC+CC:OR=1.35,95%CI 1.06~1.71,P=0.01)。该研究提示,HLA-G基因+3142G/C隐性纯合突变可能是RA发病的危险因素,且与人种有关;HLA-G基因14 bp I/D尚不能认为与RA发病有关联。
基金This work was supported by the National Natural Science Foundation of China(Grant No.39993430)by the National?63?Project(Grant No.2001AA216071).
文摘In order to investigate whether the non-classi- cal HLA-G classⅠmolecule protects the porcine endothelial cells (PECs) from the lysis mediated by human immune cells in pig to human discordant xenotransplantation, we have cloned HLA-G cDNA from a human placenta by RT-PCR. Mammalian expression vector, pEFG-neo, was constructed by insertion of HLA-G cDNA in pEF-neo. We obtained effi-ciently expressed PECs by stable transfection. Cytotoxicity assay showed that overexpression of HLA-G on PECs was sufficient to inhibit human NK-92 cell lysis. The level of lysis was equal to or less than that of the lysis of human umbilical vein endothelial cells mediated by human NK-92 cells. It also indicated that HLA-G inhibited the lysis of PECs mediated by xeno-antigen specific T lymphocytes. The reduction of lysis ranged between 59.1% and 88.9%. These findings sug-gest that the transgenic approach to overexpress HLA-G is believed to be a new immunotherapy in overcoming the im-mune rejections in xenotransplantion, including delayed xenograft rejection and cell-mediated rejection.
