不同免疫抑制剂对肾小球系膜细胞增殖的影响

目的 探讨不同免疫抑制剂对受损的肾小球系膜细胞增殖的影响.方法 在体外用细胞松弛素B可逆性地损害处于增殖期的大鼠肾小球系膜细胞株(HBZY-1细胞),然后将细胞分成5组:对照组,仅加入橄榄油10 μl;环孢素A(CsA)组,加入CsA 3μg/ml(2.5 mmol/L);他克莫司(Tac)组,加入Tac 1μg/ml;吗替麦考酚酯(MMF)组,加入MMF 0.3μg/ml;西罗莫司(SRL)组,加入SRL10 ng/ml.在药物处理后6、12和24 h时,采用专业图像分析软件对各组不同时间点的系膜细胞进行形态观察、计数和增殖情况分析.结果 药物处理后,各组HBZY-1细胞的形态均有所恢复.处理后6 h时,除Tac组HBZY-1细胞数明显高于对照组外,其余各组与对照组之间的差异均无统计学意义(P＞0.05).12 h时,各组HBZY-1细胞数之间的差异均无统计学意义(P＞0.05).24 h时,对照组和MMF组之间细胞数的差异无统计学意义(P＞0.05);而其余各组的细胞数均显著增高,与对照组、MMF组以及与组内其他时点相比较,差异均有统计学意义(P＜0.05),其中尤以CsA组和Tac组的细胞数量增加最为显著,SRL组增加的幅度低于CsA组和Tac组(P＜0.05).结论 CsA、Tac、SRL和MMF均可不同程度地减轻受损大鼠肾小球系膜细胞的损伤和促进其恢复,但是其中CsA和Tac明显地促进了细胞的增殖,SRL促细胞增殖作用不明显,而MMF则几乎不引起系膜细胞增殖.

Effects of different immunosuppressive agents on mesangial cell proliferation

Objective To investigate the effects of different immunosuppressive agents on mesangial cell proliferation through a mesangial cell injury model in vitro. Methods Mesangial cell line (HBZY-1) in period of proliferation was cultured in vitro with cytochalasin B for 2 h, then HBZY-1 cells were divided into 5 groups: blank (control) group, cyclosporine A (CsA) group, Tacrolimus (Tac) group, mycophelonate mofetil (MMF) group and rapamycin (RAPA) group. Subsequently,the number of HBZY-1 cells at different time points was measured by using the professional image analysis software after treatment for 6, 12 and 24 h, respectively. Results Damaged HBZY-1 cells recovered in all groups. At 6 h, the number of HBZY-1 cells in Tac group was significantly more than that in control group (P＜0.05), but the difference had no significance between the other treatment groups and control group (P＞0. 05). At 12 h, there was no significant difference in of the number of HBZY-1 cells among the all groups (P＞0. 05). At 24 h, there was no significant difference in the cell number between MMF and control groups (P＞0. 05). CsA, Tac and RAPA resulted in HBZY-1 cell proliferation, and the cell number in CsA and Tac groups was significantly more than that in the other groups (P＜0. 05). As compared with the control group, the cell number in RAPA group was significantly increased (P＜0. 05). Conclusion CsA, Tac, MMF and RAPA contribute to recovery of damaged HBZY-1 cells, but CsA and Tac result in over-proliferation of HBZY-1 cells. RAPA and MMF can prevent HBZY-1 cells against over-proliferation, and MMF scarcely results in HBZY-1 cell proliferation.