橙皮苷对免疫功能低下小鼠免疫调节作用的实验研究

目的研究橙皮苷(hesperidin,HDN)对小鼠免疫调节的作用。方法腹腔注射环磷酰胺(Cy)复制免疫功能低下的动物模型,测定胸腺、脾脏重量计算脏器指数;碳廓清法测定网状内皮系统吞噬功能;分光光度法测定血清溶血素IgM、IgG(HCIgM、HCIgG);绵羊红细胞(SRBC)的定量溶血测定法(QHS)测定脾溶血空斑形成细胞(PFC);噻唑蓝(MTT)法测定脾淋巴细胞增殖反应;二硝基氟苯(DNFB)诱导迟发型变态反应模型,观察HDN对小鼠迟发型变态反应(DTH)和T淋巴细胞亚群的影响。结果HDN可提高免疫低下小鼠的脏器指数、碳廓清指数K和吞噬指数α;HDN可以改善免疫抑制小鼠低下的脾淋巴细胞增殖反应,恢复小鼠DTH和提高CD4+、CD8+细胞数;对特异性HCIgM、HCIgG和PFC无影响。结论HDN对小鼠的非特异性免疫和特异性细胞免疫反应有促进作用,对特异性体液免疫反应无影响。

Immunomodulative effect of hesperidin on immunodepressed mice

Aim To investigate the immunomodulative effect of hesperidin on immunodepressed mice.Methods The immunosuppressed mice were induced by cyclophosphamide (Cy, ip). Indexes of immune organs were calculated. Phagocytosis of mononuclear macrophage was determined by cleaning carbon particle method. Spectrophotography was used to estimate levels of serum specific IgG, IgM (HCIgM, HCIgG). Plaque forming cell (PFC) was determined with quantitative haemolysis of SRBC (QHS). Splenic lymphocytes proliferation was measured by MTT method. The mouse delayed type hypersensitivity (DTH) model induced by dinitoflruorobenzene (DNFB) was used to study the effect of hesperidin on the level of DTH and subset of T lymphocyte. Results Hesperidin remarkably increased indexes of spleen and thymus, the rate of clearance and clearance index, but had no significant impact on HCIgM, HCIgG and PFC. In addition, it could enhance the proliferation of splenic lymphocytes and reverse DTH response to normal level. Conclusion Our results indicated that hesperidin had an enhanced effect on nonspecific immunity and specific cellular immunity in immunodepressed mice, while specific humoral immunity wasn′t significantly changed.