Hsa-miR-15a/16-1靶向抑制Bcl-2基因对鼻咽癌CNE-2细胞的抑制作用

Chinese Archives of Otolaryngology-Head and Neck Surgery(2011)

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Abstract
目的观察Hsa-miR-15a/16-1靶向抑制B细胞淋巴瘤/白血病-2基因(B-cell lymphoma gene 2,Bcl-2gene)表达对鼻咽癌(nasopharyngeal carcinoma,NPC)CNE-2细胞的生长抑制作用。方法将构建成功的重组质粒pENTR-CMV-EGFP-hsa-mir-15a/16-1经Lipofectamine 2000转染CNE-2细胞,RT-qPCR检测miR-15a/16-1、Bcl-2 mRNA表达水平,流式细胞术和WesternBlot检测Bcl-2、caspase-3蛋白表达水平,CCK-8法分析细胞生长抑制情况,4,6-二脒基-2-苯基吲哚(4,6-diamidino-2-phenylindole,DAPI)染色观察细胞凋亡状况。结果转染后miR-15a表达增高(F=547.525,P均<0.001);miR-16-1表达增高(F=99.979,P均<0.001);Bcl-2 mRNA表达无明显差别(F=0.220,P>0.05);Bcl-2蛋白表达下调,caspase-3蛋白表达增高;细胞在体外凋亡明显;细胞增殖受到抑制,作用呈明显的时效关系。结论 Hsa-miR-15a/16-1对Bcl-2基因的靶向抑制,可体外对CNE-2细胞产生增殖抑制和促进凋亡作用。
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Key words
Apoptosis,Transfection,Flow Cytometry,Nasopharyngeal Neoplasms
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