五倍子对角质形成细胞、黑素细胞和成纤维细胞体外增殖的影响

目的 了解中药五倍子治疗瘢痕疙瘩的药用成分和药用机制以及可能存在的不良反应。方法 用MTT比色试验研究五倍子单宁酸对正常人皮肤中的角质形成细胞、黑素细胞和成纤维细胞体外增殖的影响。并与秋水仙碱及红花和芦荟进行了比较。结果 ①五倍子单宁酸与五倍子生药醇提物对人成纤维细胞的增殖具有相似的抑制作用。在20μg/mL及以上质量浓度时,对人皮肤黑素细胞的抑制作用较大,其细胞增殖率是不加药对照组的73.6%～68%。在50μg/mL以下的质量浓度对人角质形成细胞的体外增殖有轻微的促进作用(111%～112%)。②红花生药醇提物和芦荟水提液在实验浓度下均可促进人角质形成细胞的体外增殖,芦荟水提液还可促进人成纤维细胞的体外增殖。结论 单宁酸是五倍子醇提物中的主要活性物质,其对黑素细胞的抑制作用提示五倍子单宁酸可能存在毒副作用。

Effects of Galla Chinensis on the Proliferation of Human Keratinocytes, Melanocytes and Fibroblasts in vitro

Objective To investigate the effects of gallotannic acid, the alcohol extract of Galla chinensis, the alcohol extract of Flos carthami and the water extract of Aloe vera on normal human keratinocytes, melanocytes and fibroblasts in vitro, and get a better understanding of the mechanism of action and the possible adverse effects of Galla chinensis in treating keloid. Methods MTT colorimetric assay was used to detect the effects of gallotannin, colchicine and the later two extracts on the growth activity of the different cells. Results ①The inhibitory action of gallotannin to fibroblasts proliferation was similar to that of the alcoholic extract of Galla chinensis, and the inhibitory action of gallotannin at ≥ 20 μg/mL to the proliferation of melanocytes was obvious (the proliferation rate was 73.6%-68% of untreated cells), while gallotannin at ≤ 50 μg/mL slightly enhanced the growth activity of keratinocytes (the proliferation rate was 111%-112% of untreated cells). ②Both the alcoholic extract of Flos carthami and the water extract of Aloe vera enhanced the proliferation of keratinocytes in a dose-dependent mode. The water extract of Aloe vera also enhanced the proliferation of fibroblasts. Conclusions The gallotannin may be the main pharmacologically active component of Galla Chinensis for treating keloid, and its inhibitory activity to human melanocytes may implicate its potential adverse effects on the skin.