肝激酶B1通过下调细胞周期素D1抑制大肠癌细胞的体外增殖
Chinese Journal of Cellular and Molecular Immunology(2012)
Abstract
目的:研究肝激酶B1(LKB1)基因对大肠癌细胞增殖的影响。方法:用脂质体转染法将LKB1基因表达质粒(pReceiver-LKB1)瞬时转染SW1116及SW480细胞,半定量RT-PCR及Western blot方法检测LKB1 mRNA和蛋白水平的表达;CCK8法检测SW1116及转染重组质粒的细胞体外增殖变化;半定量RT-PCR和Western blot方法检测胞内LKB1对细胞周期蛋白cyclin D1的影响。结果:转染LKB1基因后,质粒转染组LKB1表达较空质粒组及空白对照组明显升高;质粒转染组在转染后48、72、96 h时,细胞活性较空质粒组及空白对照组明显降低(P<0.01);与对照组相比,质粒转染组的细胞内cyclin D1 mRNA和蛋白的表达明显降低。结论:LKB1可抑制大肠癌细胞的体外增殖能力,并且这一抑制效应可能通过下调cyclin D1产生。
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