钙离子一氧化氮在硒化壳聚糖诱导的皮肤成纤维细胞增殖中的作用

目的观察硒化壳聚糖对体外培养人皮肤成纤维细胞增殖周期及细胞内一氧化氮(NO)水平及钙离子含量的影响。方法皮肤成纤维细胞培养液加入不同浓度的硒化壳聚糖(25、50、100、200、400 mg/L),应用噻唑蓝(MTT)法检测细胞增殖,改良Griess法检测NO,Huo-3AM钙荧光指标剂测定细胞内钙离子浓度,流式细胞仪检测细胞周期。结果与对照组比较,50~400 mg/L硒化壳聚糖作用48 h后,细胞对MTT的吸收明显升高(P<0.05);各浓度硒化壳聚糖组细胞NO水平(72±9)μmol/L~(44±10)μmol/L与对照组(107±9)μmol/L比较均呈不同程度下降,呈剂量依赖性(P<0.01);200、400 mg/L硒化壳聚糖组细胞内钙离子浓度(179±32)mmol/L、(179±14)mmol/L与对照组(147±10)mmol/L比较显著升高(P<0.05);流式细胞分析显示,G0~G1期细胞所占百分率显著性减少,G2~M期和S期细胞所占百分率显著性增加(P<0.01)。结论硒化壳聚糖可通过调节细胞内钙离子含量和NO水平来促进皮肤成纤维细胞增殖。

Effects of intracellular calcium and nitric oxide on proliferation of cultured human skin fibroblasts induced by selenium chitosan in vitro

Objective To investigate the effects of intracellular calcium and nitric oxide on proliferation of cultured human skin fibroblasts induced by selenium chitosan in vitro.Methods The cultured human skin fibroblasts were treated with 25,50,100,200 and 400 mg/L of selenium chitosan.The proliferation of the cell was measured by MTT analysis.NO level was assayed by Griess method.The concentration of intracellular calcium was determined using the fluorescent calcium indicator Fluo-3Am and the cell cycle was analyz...