Bcl-2对免疫抑制剂培养中胰岛细胞的保护作用

目的探讨免疫抑制剂对体外培养的大鼠胰岛细胞的毒性作用以及抗凋亡基因Bc l-2对胰岛细胞的保护作用。方法腺病毒介导的基因转染后表达Bc l-2的大鼠胰岛细胞和对照胰岛细胞分别加入不同浓度的他克莫司培养基中,48 h后检测胰岛细胞的凋亡率和分泌胰岛素的功能。结果低剂量和高剂量的他克莫司都能诱导胰岛细胞凋亡,减少胰岛素分泌,Bc l-2能抑制凋亡,改善胰岛素分泌。结论他克莫司对体外培养的大鼠胰岛细胞有直接的损害作用,而Bc l-2能防治这种损害作用。

Study on protection of Bcl-2 on islet cells cultured in immunosuppressive drugs

Objective To investigate the toxic effect of immunosuppressive drugs on apoptosis of rat pancreatic islet cells in vitro and the protective action of Bcl-2.Methods Islet cells expressing Bcl-2 and the control islet cells were cultured at different concentrations of tacrolimus and the apoptosis rate of islet cells and insulin accumulation in the culture medium were detected after 48h.Results Low and high concentrations of tacrolimus induced the apoptosis of islet cells and decreased insulin secretion.The Bcl-2 inhibited the apoptosis of islet cells induced by tacrolimus and improved the insulin secretion.Conclusion Tacrolimus may directly damage to isolated rat islet cells and the expression of Bcl-2 can protect the cells from the damage of immunosuppressive drugs.