无比山药丸对腺嘌呤致肾阳虚大鼠性功能障碍的影响

Effect of Wubi Shanyao Pills on sexual dysfunction in rats with adenine-induced kidney-Yang deficiency

研究无比山药丸改善肾阳虚模型大鼠性功能障碍的作用及其可能机制。采用雄性SD大鼠灌胃腺嘌呤(100 mg·kg^-1)8周制备肾阳虚模型,造模同时给予无比山药丸3个剂量(2,1,0.5 g·kg^-1)灌胃,连续给药8周。期间,观察模型大鼠肾阳虚证候表现,进行证候评分;交配实验测定性行为指标(捕捉、骑跨及射精的潜伏期和次数);采用放射免疫法检测血清睾酮(T)、雌二醇(E2)、促卵泡生成素(FSH)、促黄体生成素(LH)、促性腺激素释放激素(GnRH)水平;测定睾丸、精囊湿重,采用紫外分光光度法检测精浆果糖含量,HE染色法观察睾丸和附睾病理改变,免疫组化和Western blot法检测睾丸组织中TGF-β1和CYP19蛋白表达。结果显示,无比山药丸可显著降低模型大鼠肾阳虚证候评分,改善肾阳虚证候表现;减少捕捉、骑跨及射精潜伏期,增加捕捉、骑跨次数;增加血清T,LH,FSH,E2,GnRH水平;增加睾丸和精囊湿重及精浆果糖含量,改善睾丸、附睾病变;抑制睾丸TGF-β1表达,增加CYP19表达。因此,无比山药丸具有明显改善肾阳虚模型大鼠性功能障碍的作用,其改善性功能障碍的机制可能与调节下丘脑-垂体-性腺(HPG)轴功能低下,进而改善性激素分泌紊乱有关;此外,还可能与抑制睾丸TGF-β1表达,增加CYP19表达,进而调节体内T转化为E2的量有关。

The aim of this paper was to study the effect of Wubi Shanyao Pills on sexual dysfunction in rats with kidney-Yang deficiency and to investigate its possible mechanism. Adenine(100 mg·kg^-1) was administered to male SD rats for 8 weeks to establish kidney-Yang deficiency model, and at the same time, Wubi Shanyao Pills(2, 1, 0.5 g·kg^-1) were administered to rats for 8 weeks. The syndrome manifestation of kidney-Yang deficiency was observed in rats and the scores of symptoms were evaluated. Sexual behavior indexes(incubation period and times of capture, straddle and ejaculation) were measured by mating experiment. The levels of serum testosterone(T), estradiol(E2), follicle stimulating hormone(FSH), luteinizing hormone(LH), and gonadotropin releasing hormone(GnRH) were measured by radioimmunoassay. The wet weights of testis and seminal vesicle were measured. The content of fructose in seminal plasma was detected by UV spectrophotometry. The pathological changes of testis and epididymis were observed by HE staining. The expression levels of transforming growth factor(TGF-β1) and cytochrome P450 aromatase(CYP19) in testis were detected by immunohistochemistry and Western blot. The results showed that Wubi Shanyao Pills could significantly reduce the score of kidney-Yang deficiency syndrome, improve the symptoms of kidney-Yang deficiency syndrome, shorten capture, straddle and ejaculation latency, increase capture and straddle times, increase serum T, LH, FSH, E2 and GnRH levels, increase the wet weight of testis and seminal vesicle and fructose content in seminal plasma, improve the pathological structure of testis and epididymis, and inhibit the expression of TGF-β1 and increase CYP19 in testis of the model rats. Therefore, Wubi Shanyao Pills can significantly improve sexual dysfunction in rats with kidney-Yang deficiency, and its mechanism may be related to regulating the low function of hypothalamus pituitary gonad(HPG) axis and improving the disorder of sex hormone secretion. In addition, it may be also related to inhibiting the expression of testicular TGF-β1, increasing the expression of CYP19 protein, and then regulating the amount of T converted to E2.