芦荟粗多糖对体外培养人表皮细胞增殖作用的研究

目的研究芦荟粗多糖对体外培养人表皮细胞增殖活性、细胞内Ca2+水平及细胞LDH漏出率的影响。方法应用不同浓度(75,150,300,600,1 200 mg.L-1)芦荟粗多糖作用于表皮细胞,观察计算生长曲线和细胞增殖指数,并测定细胞内Ca2+水平和LDH漏出率。结果芦荟粗多糖组表皮细胞培养2 d后增殖速度明显增快,d 3~5细胞增殖指数呈剂量依赖性上升。与对照组比较,600和1 200 mg.L-1芦荟粗多糖组表皮细胞内Ca2+水平升高(P<0.05),而这两组LDH漏出率则下降(P<0.05)。结论芦荟粗多糖具有促进体外表皮细胞增殖和保护表皮细胞的作用,并可能通过调节细胞内Ca2+来发挥其促进细胞增殖作用。

The proliferative effect of aloe coarse polysaccharide on the cultured epidermal cells in vitro

Aim To investigate the effects of aloe coarse polysaccharid on proliferation and the intracellular calcium level and the leakage rate of lactate dehydrogen-ase(LDH) of the epidermal cellsin vitro.Methods The epidermal cells were treated with aloe coarse po-lysaccharid of75,150,300,600 and 1 200 mg.L-1respectively.The proliferation of epidermal cells wasobserved interms of the proliferation curve and the pop-ulation doubling/day(PD/d).The concentration ofintracellular calcium and the leakage rate of LDHwerealso measured.Results In aloe coarse polysaccharidgroup,a dose-dependent and statistically significant(P<0.05 ~0.01) promotion of epidermal cells prolif-eration was observed after 3,4 and 5 days of incuba-tion.Compared with the control group,the levels ofintracellular calcium were significantly increased andthe leakage rate of LDHwas markedly decreased in thetreatment group treated with 600 and 1 200 mg.L-1of aloe coarse polysaccharid(P<0.05).Conclusion Aloe coarse polysaccharid may have protective effectand regulate intracellular calcium which results in theproliferation of the epidermal cells.