实用肝脏病杂志 ›› 2015, Vol. 18 ›› Issue (4): 340-343.doi: 10.3969/j.issn.1672-5069.2015.04.002

• 实验性肝炎 • 上一篇    下一篇

小分子干扰RNA沉默高迁移率族蛋白B1抑制肝星状细胞Ⅰ型和Ⅲ型胶原合成*

葛文松,范建高,李光明   

  1. 200092 上海市 上海交通大学医学院附属新华医院消化内科
  • 收稿日期:2015-01-14 出版日期:2015-07-10 发布日期:2016-02-19
  • 通讯作者: 李光明,E-mail:ligm68@126.com E-mail:gewensong@126.com
  • 作者简介:葛文松,男,37岁,博士研究生,主治医师。主要从事慢性肝病及炎症性肠病诊治的基础与临床研究。E-mail:gewensong@126.com
  • 基金资助:
    国家自然科学基金项目(编号:81200279)

Inhibition of small interfering RNA targeting high mobility group box chromosomal protein 1 on collagen type Ⅰand Ⅲ in hepatic stellate cells in vitro

Ge Wensong,Fang Jiangao, Li Guangming   

  1. Department of Gastroenterology,Xinhua Hospital,Jiao Tong University School of Medicine,Shanghai 200092,China
  • Received:2015-01-14 Online:2015-07-10 Published:2016-02-19

摘要: 目的 研究小分子干扰RNA(siRNA)干扰高迁移率族蛋白B1(HMGB 1)表达对肝星状细胞(HSC) Ⅰ型和Ⅲ型胶原表达的影响。方法 将化学合成的HMGB 1基因特异性siRNA以脂质体包裹,转染HSC-T6细胞,设阴性对照和空白对照,抽提细胞总RNA和蛋白质,采用Western blot法检测细胞Ⅰ型和Ⅲ型胶原表达情况;采用细胞免疫荧光法检测Ⅰ型和Ⅲ型胶原表达与定位;采用酶联免疫吸附法检测培养上清液中Ⅰ型和Ⅲ型胶原水平。结果 转染HMGB 1基因特异性siRNA的HSC-T6细胞Ⅰ型和Ⅲ型胶原蛋白水平显著下调,免疫细胞化学检测也提示转染siRNA 后细胞内Ⅰ型和Ⅲ型胶原水平较对照组明显降低;在培养72 h时,上清液Ⅰ型胶原和Ⅲ型胶原水平分别较对照组下降了(46.36±3.82) %和(41.92±3.58) %(F=33.14,P<0.01;F=27.56,P<0.01)。结论 HMGB 1特异性siRNA能高效抑制HSC-T6细胞胶原的合成和分泌,因而可能具有预防和治疗肝纤维化的潜力。

关键词: 肝星状细胞, 小分子干扰RNA, 高迁移率族蛋白B1, 胶原

Abstract: Objective To investigate the effects of synthetic small interfering RNA(siRNA) targeting high mobility group box chromosomal protein 1(HMGB1-siRNA) on collagen type Ⅰand Ⅲ in hepatic stellate cells (HSCs) in vitro. Methods Synthetic siRNA targeting HMGB1 was transfected into HSC-T6 cells by lipofectamine, and negative siRNA transfection and no transfection were used as negative control and blank control, respectively. After incubation with siRNA,total RNA and protein of HSC-T6 cells were extracted;the protein levels of typeⅠand Ⅲ collagen were determined by using Western blotting and immunofluorescence;Collagen type Ⅰand Ⅲ levels in the supernatants were determined by enzyme linked immunosorbent assay. Results The expression of collagen type Ⅰ and Ⅲ were significantly reduced after transfection of HMGB1-siRNA compared with in control or blank. The levels of collagen type I and type Ⅲ in the supernatants of transfected cells were decreased than in the negative control at 72 hours;the 1evels of type I collagen decreased by(46.36±3.82)% (F=33.14,P<0.01) and the 1evel of type Ⅲ collagen decreased by(41.92±3.58)%(F=27.56,P<0.01) at 72 hours when compared to the control. Conclusion Inhibition of HMGB1 by siRNA decreases the synthesis and the secretions of typeⅠ and Ⅲ collagen in HSCs and this might has a potential effect in prevention and treatment of hepatic fibrosis.

Key words: Hepatic stellate cells, Small interfering RNA, High mobility group box chromosomal protein 1, Collagen