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GnRHR在不同日龄建昌黑山羊睾丸、附睾中的分布与表达

2017-07-13侯真真张谊张明

安徽农业科学 2017年13期

侯真真 张谊 张明

摘要 [目的]定位并比较不同日龄建昌黑山羊睾丸及附睾中GnRHR的分布及表达情况。[方法]分别收集55、104、300、1 140日龄建昌黑山羊的睾丸、附睾头和附睾尾组织,然后进行脱水、包埋、切片后,采用免疫组化定位GnRHR在各个组织中的分布。[结果]GnRHR在建昌黑山羊睾丸、附睾头和附睾尾组织细胞中均有分布,在上皮下层、基质层中分布较多,其表达量在300日龄的附睾尾和1 140日龄的睾丸中达到较高水平。[结论]GnRHR在睾丸、附睾中均有表达,而且不同日龄阶段表达存在组织细胞特异性。

关键词 促性腺激素释放激素受体;睾丸;附睾;建昌黑山羊

中图分类号 S827 文献标识码 A 文章编号 0517-6611(2017)13-0103-04

Localization and Distribution of GnRHR in the Testis and Epididymis from Different Age of Jianchang Black Goat

HOU Zhen-zhen1,ZHANG Yi2,ZHANG Ming1*

(1.College of Animal Science and Technology,Sichuan Agricultural University,Wenjiang,Sichuan,611130;2.School of Animal Science and Technology,Xichang College,Xichang,Sichuan 615000)

Abstract [Objective]To localize and compare the distribution and expression level of GnRHR in the testis and epididymis from different age of Jianchang black goat.[Method]The testis and epididymis were collected at 55,104,104,1 140 d after animal birth,then dehydrated,embedded and cut.Distribution of GnRHR was orientated by immunohistochemical assay.[Result]GnRHR in the testis,epididymal heads and tails,especially in subepithelial layer and stroma layer,in which had a higher expression level than other tissue was expressed.GnRHR expression was the most in the epididymis at 300 d and in the testis at 1 140 d.[Conclusion] GnRHR is expressed in the testis and epididymis,and its expression level has tissue-specificity at different age.

Abstract Gonadotropin Releasing Hormone receptor; Testis; Epididymis;Jianchang black goat

繁殖是生物物種延续最基本的生命活动,而动物繁殖必须依赖体内的繁殖调节物质。促性腺激素释放激素(Gonadotropin Releasing Hormone,GnRH) 是下丘脑分泌的十肽,是下丘脑-垂体-性腺轴的关键调节因子[1],对于哺乳动物生殖器官发育和生理机能的维持起着关键的调节作用。GnRH作用的发挥依赖于促性腺激素释放激素受体(Gonadotropin Releasing Hormone receptor,GnRHR) 的存在。GnRHR和GnRH 结合进而激发信号通路,并主要促使促黄体生成素 (LH) 和促卵泡素(FSH) 的合成与释放,参与动物机体的繁殖调控[2-3]。

建昌黑山羊是四川省地方优良品种,广泛分布于凉山彝族自治州。该山羊耐粗饲,易管理,抗病力强,繁殖力高,在当地地方经济发展中占重要的地位[4]。目前有关雄性建昌黑山羊生殖生理的基础研究很少。研究人员发现,抑制实验动物和人的GnRH基因和GnRHR基因表达,会显著抑制其生殖活动[5-6]。……

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