目的研究淫羊藿苷(icariin,ICA)伍用三七总皂苷(Panaxnotoginsengsaponins,PNS)对小鼠免疫功能的调节作用,为该组合药物改善阿尔茨海默病(Alzheimer’sdisease,AD)动物模型空间学习记忆能力的作用机制提供部分实验依据。方法采用血清药理学方法观察小鼠连续igICA+PNS[(40+320)、(80+640)、(160+1280)mg/kg]、单用ICA(80mg/kg)和PNS(640mg/kg)7d制得的含药血清对伴刀豆蛋白A(ConA)和脂多糖(LPS)诱导的小鼠脾淋巴细胞增殖、IL-2分泌的影响,并观察脏器指数的变化。结果ICA伍用PNS[(80+640)、(160+1280)mg/kg]具有较强的协同作用,其含药血清能明显促进ConA诱导的小鼠脾淋巴细胞增殖(P<0.01、0.05),量效曲线呈倒U形;含药血清对LPS诱导的小鼠脾淋巴细胞增殖无显著促进作用(P>0.05)。ICA+PNS[(80+640)和(160+1280)mg/kg]含药血清能明显促进IL-2生成(P<0.01),两组分合用作用强于单用,提示具有较强的协同作用,其量效曲线亦呈倒U形分布。单用ICA、PNS或两者合用均未明显影响小鼠脏器指数(P>0.05)。结论ICA伍用PNS对小鼠免疫系统具有一定的选择性调节作用,主要增强T细胞功能。

Objective To investigate the regulatory effects of icariin (ICA) combined with the Panax notoginseng saponins (PNS) on immunological function in mice and provide some experimental evidences for the combination mechanism improving the spatial learning and memory abilities of Alzheimer's disease (AD) animal model. Methods Based on serum pharmacological method, the ICR mice were individually ig administrated with ICA+PNS [(40+320), (80+640), and (160+ 1 280 ) mg/kg] or ICA (80 mg/kg), and PNS (640 mg/kg) only for 7 d. Drug-containing serum was prepared and effects on spleen lymphocyte proliferation of Bable/c mice induced by concanavalin-A (ConA) or lipopolysaccharide (LPS) and on interleukin-2 (IL-2) secretion were observed in vitro. Meanwhile, the immunological organ indexes of treated mice were evaluated. Results Drug-containing serum of ICA+PNS [(80+640) and (160+ 1 280 ) mg/kg] could improve the spleen lymphocyte proliferation induced by ConA (P0.01, 0.05), and its dose-effect curves were shapely similar to “”. Proliferation of spleen lymphocyte induced by LPS in tested groups could not be enchanced (P0.05). Drug-containing serum of ICA+PNS [(80+640) and (160+ 1 280) mg/kg] could improve IL-2 production (P0.01). ICA combined with PNS showed synergistic effect and an upside-down U shaped dose-effect curve. Compared with the control group, however, there were no significant differences in the immunological organ indexes of all groups administrated by ICA, PNS or the combination of the two (P0.05), respectively. Conclusion ICA combined with PNS could improve immunological function selectively and promote T cell function in mice.

国家自然科学基金资助项目(30472112);浙江省中医药管理局重点资助项目(2002KF001);浙江省科技厅计划项目(2004C33106)