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miR-98对肝癌细胞增殖和侵袭能力的影响

, PP. 16-19

Keywords: miR-98,肝癌,增殖,侵袭

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Abstract:

目的研究microRNA-98(miR-98)对肝癌细胞增殖和侵袭能力的影响及其可能机制。方法将阴性对照、miR-98mimics、inhibitor阴性对照、miR-98inhibitor瞬时转入肝癌细胞株,应用噻唑盐(MTT)法、平板集落形成实验、Transwell小室侵袭法、流式细胞周期实验检测miR-98对SMMC7721细胞生长、增殖及侵袭能力的影响。进一步用Westernblot检测CyclinD1的表达水平。结果MTT实验表明miR-98过表达后,肝癌细胞的生长能力明显高于对照组,平板克隆实验的结果说明miR-98可以使肝癌细胞的克隆形成率由17.33%升高至76.66%、Transwell小室侵袭实验表明miR-98使肝癌细胞的侵袭能力也明显增强。流式细胞周期实验发现miR-98过表达后,肝癌细胞停留在G1=66.71%期和S=35.89%期的数目显著高于对照组G1=38.93%,S=26.62%。而当miR-98被抑制后,SMMC7721肝癌细胞的生长增殖及侵袭能力减弱。Westernblot实验检测发现miR-98过表达后,CyclinD1的表达也升高。结论miR-98可能通过上调CyclinD1的表达,增强SMMC7721细胞的生长增殖和侵袭能力,提示miR-98可能在肝癌的发生、发展中起重要作用。

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