苦瓜皂甙对衰老动物内分泌功能的影响

EFFECTS OF MOMORDICA SAPONINS ON ENDOCRINE FUNCTION IN SENILE MICE

目的 :探讨苦瓜皂甙对衰老动物内分泌功能的调节作用。方法 :15月龄雌性老年昆明小鼠 ,随机分为老年对照组、实验 1组和实验 2组三组 ,同时准备 4月龄雌性昆明小鼠作青年对照组 ,其中两对照组饮水为普通水 ,两个实验组饮水分别含有 10 0mg/L及 2 0 0mg/L苦瓜皂甙 ,饲养 5周后取血清标本待测。同时 ,取 12月龄大鼠胸腺细胞培养 ,检测不同浓度苦瓜皂甙对雌激素受体蛋白表达的影响。结果 :与青年对照组相比 ,衰老小鼠血清ACTH、雌二醇水平显著降低。与老年对照组相比 ,两实验组血清雌二醇水平均明显升高 ,ACTH水平有升高趋势 ,但只有高剂量组有显著性 ;两组之间所有指标均没有显著性差异。体外实验发现 ,苦瓜皂甙明显促进雌激素受体蛋白的表达 ,却不影响其mRNA水平。结论

Aim: To study the regulation effects of Momordica saponins on endocrine function in senile mice. Methods: 15 month Kunming mice (female), were divided into senile control group(SC), experimental group 1 and 2 (E1 and E2). 10 4 month mice were as young control group(YC). All mice were fed with general foodstuff, SC and YC drank tap water, while two experimental groups drank tap water supplied to 100 mg/L and 200 mg/L Momordica saponins respectively. Serum was assayed after 5 weeks. At the same time, levels of estrogen receptor and its mRNA were assayed in cultured thymocyte from 12 month rat. Results: Serum ACTH and estradiol levels declined markedly in senile mice compared with young mice. ACTH levels increased in some extent in two experimental groups, while there had significant difference only in E2. Serum estradiol increased obviously, but there was no significant distinct between E1 and E2. The most important was that ER levels increased obviously, and there was no any change of ER mRNA levels in rat thymocyte cultured in medium contained different content of Momordica saponins. Conclusion: Momordica saponins could improve endocrine function in senile mice by increasing ACTH level and expression of ER.