实用肝脏病杂志 ›› 2016, Vol. 19 ›› Issue (2): 147-150.doi: 10.3969/j.issn.1672-5069.2016.02.006

• 实验性肝炎 • 上一篇    下一篇

活性维生素D3联合LY294002体外抑制大鼠肝星状细胞增殖作用研究*

王蕾, 李校天, 张利, 张九娜   

  1. 056000 河北省邯郸市 承德医学院研究生院(王蕾); 河北工程大学附属医院(李校天,张利,张九娜)
  • 收稿日期:2015-09-02 出版日期:2016-03-10 发布日期:2016-03-04
  • 通讯作者: 李校天,E-mail:xtianli@sina.com
  • 作者简介:王蕾,女,26岁,硕士研究生。研究方向:慢性肝病的防治研究 。E-mail: wangleiguantao@163.com
  • 基金资助:
    河北省卫生厅重点科技研究计划项目(编号:20150490)

Inhibitory and apoptotic effect of LY 294002in combination with 1,25-dihydroxyvitamin D3 on HSC T6 cells in vitro

Wang Lei, Li Xiaotian, Zhang Li, et al   

  1. Chengde Medical College, Department of Gastroenterology,Affiliated Hospital, Hebei Engineering University,Handan 056000, Hebei Province,China
  • Received:2015-09-02 Online:2016-03-10 Published:2016-03-04

摘要: 目的探究维生素D的活性形式—1,25-(OH)2D3联合磷脂酰肌醇-3激酶/蛋白激酶B(PI3K/Akt)信号通路的特异抑制剂LY294002对体外培养大鼠肝星状细胞的抑制作用。方法将HSC-T6细胞分为正常对照、 DMSO组、1,25-(OH)2D3、LY294002组和1,25-(OH)2D3+ LY294002 联合组,采用MTT法检测细胞增殖;在倒置显微镜下观察细胞形态变化;使用流式细胞术检测HSC-T6细胞凋亡;采用Western blotting法检测Phospho-Akt(Ser473)、AKT(PAN)、半胱氨酸天冬氨酸蛋白酶(caspase)-3蛋白表达。结果体外干预肝星状细胞48 h后,两药联合干预组细胞抑制率为87.5%,显著高于1,25-(OH)2D3组的50.3%或LY294002组的40.3%(P<0.05);联合组细胞凋亡率为92.12%,显著高于1,25-(OH)2D3组的71.0%或LY294002组的34.0%(P<0.05);在显微镜下观察,两药处理组细胞形状由星形变为不规则形,凋亡数量增多,表现为正常活细胞数目明显减少,胞间隙增宽,细胞体积缩小,胞浆浓缩,胞核固缩,可见空泡及细胞碎片,有的细胞出现数量不等的凋亡小体;与单药干预组比,联合组细胞Bax/Bcl-2比值上升明显(P<0.05),活化的凋亡蛋白caspase-3表达显著增加(P<0.05)。结论1,25-(OH)2D3可协同LY294002 共同诱导 HSC-T6 细胞凋亡,增强其抗肝纤维化的效果。

关键词: 大鼠星状细胞, 细胞凋亡, LY294002, 1, 25-(OH)2D3, 磷脂酰肌醇-3激酶/蛋白激酶

Abstract: Objective To invastigate the anti-proliferating and apoptotic effect of LY294002 and 1,25-dihydroxyvitamin D3(1,25-(OH)2D3) on hepatic stellate (HSC-T6) cells in vitro. MethodsThe HSC-T6 cells were divided into five groups, e.g. control, DMSO, 1,25-(OH)2D3,LY294002 and 1,25-(OH)2D3 plus LY294002. The inhibitory effects were detected by MTT assay; The cell morphology was observed under microscopy; The apoptosis was detected by FCM, and the expression of Ser473,AKT and caspase-3 protein were assayed by Western blotting.Results The inhibitory rate in 1,25-(OH)2D3 plus LY294002 group was 87.5%,much higher than 50.3% in 1,25-(OH)2D3 or 40.3% in LY294002 group (P<0.05) after 48 h intervention;the apoptotic rate in 1,25-(OH)2D3 plus LY294002 group was 92.12%,much higher than 71.0% in 1,25-(OH)2D3 or 34.0% in LY294002-intervented group(P<0.05);the ratio of Bax/Bcl-2 increased (P<0.05),and the expression of caspase-3 also increased obviously in 1,25-(OH)2D3 plus LY294002 group(P<0.05).ConclusionLY294002 has an anti-fibrotic effect with the assistance of 1,25-(OH)2D3 on T6 cells in vitro.

Key words: T6 cells, LY294002, 1, 25-dihydroxyvitamin D3, Cell apoptosis, PI3 K /Akt signal pathway