Objective To investigate the expression of JMJD3 and its functions for cell growth in human gastric carcinoma.Methods The expression of JMJD3 was detected by immunohistochemistry.Recombinant JMJD3 plasmids were transfected into MGC-803 cells.Cell proliferation was determined by CCK-8 assay and cell apoptosis was detected by flow cytometry.Results The expression of JMJD3 was down-regulated in gastric carcinoma tissues (P ＜ 0.05).Low expression of JMJD3 was associated with advanced TNM stage (Ⅲ+Ⅳ,P ＜ 0.05).Overexpression of JMJD3 could inhibit cell proliferation and induce cell apoptosis (P ＜ 0.05).Conclusion Low expression of JMJD3 was commonly existed in gastric cancer.JMJD3 could inhibit cell proliferation and induce cell apoptosis.%目的:研究组蛋白去甲基化酶JMJD3在人胃癌中的表达并对胃癌细胞增殖及凋亡的影响.方法:通过免疫组化分析了40对胃癌及癌旁组织中JMJD3的表达.通过重组质粒在胃癌MGC-803细胞中过表达JMJD3,利用CCK-8及流式细胞仪分别探索JMJD3对于胃癌细胞增殖及凋亡能力的影响.结果:胃癌组织中的JMJD3表达明显低于癌旁组织(P＜0.05);胃癌组织JMJD3蛋白阴性表达与较晚的TNM分期(Ⅲ+Ⅳ期,P＜ 0.05)具有相关性.过表达JMJD3能够显著抑制MGC-803细胞的增殖并促进细胞凋亡(P＜0.05).结论:JMJD3在胃癌中低表达,且JMJD3对胃癌细胞的增殖具有抑制作用而对细胞凋亡具有促进作用.
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