黄芪皂苷Ⅳ对小鼠T、B淋巴细胞增殖和腹腔巨噬细胞功能的影响

目的：探讨黄芪皂苷Ⅳ（ASI）对小鼠T,B淋巴细胞增殖和腹腔巨噬细胞分泌的细胞因子的影响。方法：采用MTT法检测T,B淋巴细胞的增殖;采用分光光度计测定法检测抗体活性;IL－1活性用胸腺细胞增殖法测定;TNF－α活性用L9292细胞杀伤法测定。结果：1）ASI50－200mg/kg ig7天能够促进T淋巴细胞增殖和抗体生成,而ASI50－100mg/kg 能够促进B淋巴细胞增殖,但是200mg/kg对B淋巴细胞增殖无影响;（2）ASI体外仅在200nmol/L对T,B淋巴细胞有促进作用;（3）ASI 1nmol/L可以促进腹腔巨噬细胞分泌IL－1,而100－1000nmol/L则抑制腹腔巨噬细胞分泌IL－1;（4）ASI体外可以抑制LPS刺激或无LPS刺激下的腹腔巨噬细胞分泌TNF－α。结论：ASI能够促进小鼠T,B淋巴细胞的增殖和抗体生成,同时可以抑制腹腔巨噬细胞体内分泌IL－1和TNF－α。

Effect of astragaloside IV on T, B lymphocyte proliferation and peritoneal macrophage function in mice

AIM: To investigate the effect of astragaloside IV (ASI) on T, B lymphocyte proliferation, antibody production, and cytokines produced by murine peritoneal macrophages. METHODS: MTT assay was used to determine T, B lymphocyte proliferation and quantitative hemolysin spectrophotometry (QHS) assay was applied to test antibody production; IL-1 production was measured by thymocyte proliferation assay; TNF-alpha production was determined by the cytotoxicity assay against L929 cells. RESULTS: 1) In vivo, ASI 50-200 mg/kg ig for 7 d increased T lymphocyte proliferation and antibody production, and ASI 50-100 mg/kg ig for 7 d increased B lymphocyte proliferation but ASI 200 mg/kg had no effect on B lymphocyte proliferation; 2) In vitro, ASI increased T, B lymphocyte proliferation only at 100 nmol/L; 3) ASI increased IL-1 activity at 1 nmol/L in vitro, but decreased it at 100 and 1000 nmol/L; 4) ASI inhibited TNF-alpha activity with or without LPS-stimulation in vitro. CONCLUSION: ASI increased T, B lymphocyte proliferation and antibody production in vivo and in vitro; but inhibited productions of IL-1 and TNF-alpha from peritoneal macrophages in vitro.