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作 者:张少燕[1,2] 刘霞[1,3] 王笑峰[1] 王云[1] 罗兵[1]
机构地区:[1]青岛大学医学院微生物学教研室,山东青岛266021 [2]青岛大学医学院附属医院检验科,山东青岛266021 [3]青岛大学医学院附属医院生殖医学中心,山东青岛266021
出 处:《青岛大学医学院学报》2013年第5期386-389,共4页Acta Academiae Medicinae Qingdao Universitatis
基 金:国家自然科学基金资助项目(30471623);山东省科技厅资助项目(2004GG3202016)
摘 要:目的探讨转化生长因子β1(TGF-β1)和EB病毒(EBV)潜伏期膜蛋白1(LMP1)在EBV相关胃癌发生中的作用及其机制。方法设计合成靶向LMP1的siRNA649转染EBV阳性胃癌细胞系GT38,并与TGF-β1联合作用,RT-PCR检测LMP1沉默和TGF-β1作用对LMP1介导的信号转导通路相关因子转录表达的影响。结果与细胞对照和脂质体对照比较,siRNA649、siRNA649+TGF-β1分别作用GT38细胞系后,基质金属蛋白酶9(MMP9)、生存素(Survivin)和细胞黏附分子1(ICAM-1)表达降低,而细胞周期依赖性激酶4(CDK4)表达升高,差异均有显著性(F=10.48~26.23,P<0.05);siRNA649+TGF-β1联合作用后表皮生长因子受体(EGFR)表达水平显著高于对照组(F=9.47,P<0.05),而siRNA649组与对照组比较差异无显著性(P>0.05)。TGF-β1作用EBV阳性细胞系(GT38和SNU719)和EBV阴性细胞系(SGC7901和HGC-27),与对照组相比GT38细胞中ICAM-1表达显著降低,差异有显著性(F=30.36,P<0.05),其他细胞中ICAM-1的表达差异无显著性(P>0.05);4种细胞系TGF-β1作用前后MMP9、Survivin、CDK4和EGFRmRNA转录表达差异均无显著意义(P>0.05)。结论 LMP1可以调控MMP9、Survivin和CDK4表达,LMP1与TGF-β1相互作用可调控ICAM-1和EGFR的转录表达。Objective To explore the mechanism of transforming growth factor-β1 (TGF-β1) and Epstein Barr virus (EBV) latent membrane proteinl (LMP1) in EBV-associated gastric carcinoma (EBVaGC). Methods The siRNA targeted to LMP1 (siRNA649) was designed and synthesized. The EBV-positive gastric carcinoma cell line (GT38) was treated with si RNA649 and TGF-β1. RT-PCR was used to detect the expression of LMPl-mediated signal pathway transforming factors. Re- sults After respective treatment with siRNA649 and siRNA649+TGF-β1, the expression of MMP9, Survivin and ICAM-1 de creased in EBV positive cell line (GT38) and CDK4 increased, the difference was significant (F = 10.48-26.23,P〈0.05) ; After combined action of siRNA649q TGF-β1, the expression of EGFR was higher than that in the normal control (F=9.47 ,P〈0.05), while the difference between siRNA649 and normal control was not significant. Compared with the normal control, the expression of ICAM-1 decreased in GT38 (F=30.36,P〈0.05), but not in other cell lines after TGF-β1 treatment in EBV positive cell lines (GT38 and SNU719) and EBV negative cell lines (SGC7901and HGC-27) (P)0.05). In the four cell lines, the mRNA expression of MMPg, Survivin, CDK4 and EGFR was not different between before and after TGF-β1 treatment (P〉0.05). Conclusion LMP1 can regulate the expressions of MMPg, Survivin and CDK4. The interaction of ICAM-1 and EGFR can regulate the tran- scription expression of LMP1 and TGF-β1.
关 键 词:转化生长因子Β EB病毒潜伏期膜蛋白1 EB病毒相关胃癌
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