杜仲补天素胶囊改善环磷酰胺诱导的小鼠生精障碍研究

目的采用环磷酰胺(cyclophosphamide,CP)诱导的小鼠生精障碍模型,探究杜仲补天素胶囊(Duzhong Butiansu Capsule,DBC)的生殖保护作用及其机制。方法采用昆明种小鼠ipCP(60mg/kg)制备生精障碍模型,连续5d,第8天起ig给予DBC高、低剂量(1.388、0.694 g/kg)干预4周,给药结束后检测各组小鼠体质量、脏器指数变化,HE染色检测睾丸病理结构变化,ELISA法测定血清睾酮(T)、促卵泡激素(FSH)、促黄体生成素(LH)、丙二醛(MDA)、超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)水平;Western blotting及免疫组化法分析睾丸组织中转录因子NF-E2相关因子2(Nrf2)、血红素氧合酶-1(HO-1)、醌氧化还原酶1(NQO1)、组蛋白脱乙酰基酶2(HDAC2)与磷酸化蛋白激酶C(p-PKC)表达。结果与模型组比较,DBC对小鼠体质量下降有极显著干预作用,能够增加睾丸、附睾及肾脏指数,改善睾丸病理形态损伤,增加精子数、提高精子活力、降低精子畸形率,提高T水平,降低LH、FSH水平,降低MDA含量,提高SOD、GSH-Px活性,提高Nrf2、HO-1、NQO1、HDAC2与p-PKC蛋白的表达水平(P0.05、0.01)。结论 DBC能够改善CP诱导的小鼠生精障碍,其机制可能与调节氧化应激相关的Nrf2/抗氧化作用元件(ARE)信号通路有关。

Effect of Duzhong Butiansu Capsule on improving spermatogenesis obstacle in mice induced by cyclophosphamide

Objective To investigate the reproductive protective effect of Duzhong Butiansu Capsule (DBC) by using cyclophosphamide induced spermatogenic disorder model, and explore its mechanism. Methods The model of spermatogenic disorder was established by intraperitoneal injection of cyclophosphamide (60 mg/kg) for 5 d. Drug intervention at high and low doses (1.388 g/kg and 0.694 g/kg) was given for 4 weeks from the 8th day. The body weight and organ index of each group were measured. The pathological structure of testis was detected by HE staining. ELISA method was used to detect the levels of T, FSH, LH, MDA, SOD, GSH-Px. Western blotting and immunohistochemistry were used to analyze the expression of Nrf2/ARE signaling pathway related factors Nrf2, HO-1, NQO1, HDAC2, and p-PKC in testicular tissue. Results Compared with the model group, DBC significantly reduced the weight of mice, increased the index of testis, epididymis and kidney, improved the pathological morphology of testis, increased the number of spermatozoa, increased the motility of sperm, decreased the rate of abnormal sperm, increased the level of T and decreasd the level of LH and FSH, increased the content of MDA, decreased the content of SOD and GSH-Px, increased the expression of Nrf2, HO-1, NQO1, HDAC2, and p-PKC protein, and increased the area of positive expression of Nrf2, HO-1 protein (P < 0.05 or P< 0.01). Conclusion DBC can obviously improve the spermatogenic disorder induced by cyclophosphamide, and the mechanism may be related to the regulation of Nrf2/ARE signal pathway associated with oxidative stress.