复方麦芽丸对来曲唑诱导的多囊卵巢综合征大鼠模型卵巢ERα和ERβ表达的影响

Effects of compound malt pills on expressions of ERα and ERβ in ovaries of rats with letrozole-induced polycystic ovarian syndrome

目的:观察复方麦芽丸对来曲唑诱导的多囊卵巢综合征(polycystic ovarian syndrome,PCOS)大鼠模型雌激素受体α亚型(estrogen receptorα,ERα)和雌激素受体β亚型(estrogen receptorβ,ERβ)的影响,探讨其对PCOS的作用机制。方法:建立PCOS大鼠模型,48只6周龄雌性SD大鼠随机均分为6组(正常组、模型对照组、阳性对照组、复方低剂量组、复方中剂量组、复方高剂量组),21 d造模成功后,灌胃治疗21 d。观察治疗后各组大鼠卵巢组织形态变化,采用免疫组织化学、Western印迹和RT-PCR检测各组大鼠卵巢组织中ERα和ERβ蛋白的表达。结果:模型对照组大鼠卵巢囊状扩张数较正常组增多,颗粒细胞减少;与模型对照组比较,治疗后各组大鼠囊状扩张的卵泡明显减少并缩小,原始卵泡、黄体、颗粒细胞增多。模型对照组ERα和ERβ的表达明显降低(P<0.01),药物干预组ERα和ERβ的表达升高(P<0.05或P<0.01)。结论:复方麦芽丸可通过调控卵巢组织ERα和ERβ蛋白的表达而在PCOS的治疗中发挥作用。

Objective： To explore the effect of compound malt pills（CMP） on polycystic ovarian syndrome（PCOS） rat model induced by letrozole and the underlying mechanisms.Methods： To establish a PCOS rat model, 48 female SD rats aged 6 weeks were randomly divided into 6 groups（n=8）： A normal group, a model control group, a positive control group, a low-dose CMP group, a middle-dose CMP group, and a high-dose CMP group. Rats were treated for 21 days aft er the PCOS model was successfully established. Ovarian morphology changes were observed,and the expressions of ERα and ERβ was examined by immunohistochemistry, Western blot and RT-PCR, respectively.Results： Compared with the normal group, the number of follicular cystic dilatation in the model control group was increased and the granulosa cells were decreased. After the treatment, the number of follicular cystic dilatation was reduced compared with the model control group, but the primordial follicles, corpus luteum and granulosa cells were increased. The expressions of ERα and ERβ in the model control group were significantly decreased（P0.01）, which were increased in the intervention groups（P0.05 or P0.01）.Conclusion： CMP may play a role in the treatment of PCOS by regulating the expressions of ERαand ERβ.