摘要
目的 观察转化生长因子β1小干扰RNA（TGFβ1 siRNA）对肝星状细胞增殖、活化、胶原合成的影响.方法 利用脂质体将TGFβ1 siRNA表达质粒转入肝星状细胞中,培养72 h后,收集肝星状细胞和上清液,采用Western blotting和RT-PCR法分别检测细胞TGFβ1和a-SMA蛋白表达、Ⅰ、Ⅲ型胶原mRNA表达;MTT法检测细胞增殖活性和放射免疫法检测培养上清液中IV型胶原和透明质酸含量.结果 与无关对照siRNA组相比,TGFβ1和a-SMA蛋白表达分别下调（79±5）%和（55±4）%（均P〈0.01）;细胞增殖活性降低（25±4）%（P〈0.01）;Ⅰ、Ⅲ型胶原mRNA表达分别下调（63±6）%和（57±4）%（均P〈0.01）;培养上清中IV型前胶原和透明质酸含量分别降低（53±8）%和（46±8）%（均P〈0.01）.结论 TGFβ1 siRNA能显著下调TGFβ1的表达,抑制肝星状细胞活化、增殖及细胞外基质的合成和分泌.
Objective To investigate the effect of TGFβ1 siRNA on hepatic satellite cells （HSCs） activation, proliferation and extracellular matrix production. Methods The TGFβ1, siRNA plasmid was transfected into HSCs with Lipofectamine 2000. The supernatant and HSCs were collected after incubation for 72h. The expression of TGFβ1, and a-SMA protein in HSCs was detected by. Western blotting. The expression of type Ⅰ and Ⅲ collagen mRNA was detected by RT-PCR. The cell proliferation was assayed by MTT method. Contents of typeⅣ collagen and hyaluronic acid in supernatant were determined by radioimmuno-assay.Results Compared with scrambled control group, the TGFβ1, and a-SMA protein expression,the activity of HSCs proliferation,the expression of typeⅠ and Ⅲ collagen mRNA,and the contents of type Ⅳ collagen and hyaluronic acid in supernatant were reduced in TGFβ1, siRNA group by （79±5）%,（55±4）%, （25±4）% ,（63±6）% ,（57±4）% ,（53±8）% ,（46±8）% （ P〈0.01）,respectively.Conclusion TGFβ1, siRNA could significantly reduce the expression of TGFβ1,inhibited HSC activation,proliferation and extracellular matrix production.
出处
《中国医师杂志》
CAS
2010年第5期596-599,共4页
Journal of Chinese Physician
基金
浙江省自然科学基金项目（Y2080599）
