黄芪提取物免疫调节活性的体外实验研究

目的：研究黄芪提取物（Astragalus membranaceus extract,AME)对人的外周血免疫细胞（PBIC）免疫功能的调节作用。方法：采用^3H-TdR掺入法分析AME对外周血单个核细胞（PBMC）的增殖活性及对外周血粘附单核细胞（PBAM）吞噬肿瘤细胞的影响；采用^51Cr释放法测定AME对杀伤性T细胞（CTL）杀伤肿瘤细胞的影响；用ELISA法和生物学法研究AME对外周血B细胞（PBBC）产生IgG及对PBAM产生细胞因子的影响；采用SDS－PAGE分析AME的蛋白组成。结果：AME能促进PBMC的增殖；提高CTL对肿瘤细胞的杀伤活性；增强PBAM对肿瘤细胞的吞噬和产生细胞因子的功能；促进了PBBC产生IgG;AME含有多种蛋白成分。结论：AME对人免疫功能有增强作用，提高了抗肿瘤免疫效应，可应用于临床调节免疫功能和治疗肿瘤等疾病。

Extracorporeal Experimental Study on Immuno-Modulatory Activity of Astragalus memhranaceus Extract

OBJECTIVE: To study the effect of Astragalus membranaceus extract (AME) in regulating the immune function of human peripheral blood immune cells (PBIC) in vitro. METHODS: Effects of AME on the proliferation activity of peripheral blood mononuclear cells (PBMC) and the tumor cell phagocytosis of peripheral blood adherent monocytes (PBAM) were measured by using 3H-TdR incorporation. Effect of the tumor-killing activity of cytotoxic T-lymphocyte (CTL) was determined by using 51Cr-releasing assay. Effects on production of IgG by peripheral blood B cells (PBBC) and IL-6 by PBAM were tested by means of ELISA, and effect on production of TNF-alpha by PBAM was studied by means of biological method. Besides, the protein elements of AME were analysed by SDS-PAGE. RESULTS: AME could promote the proliferation of human PBMC, elevate the tumor cell-killing activity of CTL, strengthen the tumor cell phagocytosis and cytokines (TNF-alpha and IL-6) production of PBAM, and promote the IgG production of PBBC. AME contained multiple protein elements. CONCLUSION: AME has effect in enhancing human immuno-function and anti-tumor activity, it could be applied in clinical practice for immuno-modulation and tumor treatment.