细胞生长因子体外对大鼠肝干细胞的影响

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目的研究大鼠肝干细胞系WB-F344细胞在体外的生长分化与多种细胞因子的关系.方法用3H掺入法检测细胞因子对WB-F344细胞生长增殖作用.用western blot检测WB-F344细胞因子受体的表达.流式细胞仪检测细胞凋亡.结果发现肝细胞生长因子(HGF)80ng/ml cpm值为982.95、表皮生长因子(EGF)80 ng/ml cpm值为906.32、胰岛素80 ng/ml cpm值为968.67、成纤维细胞生长因子(FGFα)80 ng/ml cpm值为863.98,促进WBF344细胞的增殖;白细胞介素-6(IL-6)80 ng/ml cpm值为368.67、肿瘤坏死因子α 80 ng/ml cpm值为372.90对WB-F344细胞的生长无明显影响;而转化生长因子(TGF β)能够诱导WB-F344细胞凋亡(80 ng/ml凋亡率为26.89%)并抑制其生长;western blot检测发现WB-F344细胞表面存在HGF、EGF、FGF α、TGF β等细胞因子受体.提示细胞因子可能通过与其受体结合方式调控WB-F344细胞的生长分化.进一步用HGF、EGF、胰岛素等细胞因子组成并添加地塞米松的分化培养体系,在体外对WB-F344细胞进行定向诱导分化.发现WB-F344细胞在体外能够向肝实质细胞分化.此外HGF还具有刺激肝干细胞离散作用.结论肝干细胞的生长分化受多种细胞因子的调控,细胞生长因子可能在严重肝损伤后肝干细胞的动员、增殖及分化调控中起重要作用.
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