畜牧兽医学报 ›› 2015, Vol. 46 ›› Issue (5): 711-718.doi: 10.11843/j.issn.0366-6964.2015.05.005

• 遗传繁育 • 上一篇    下一篇

山羊Lcn 5的表达特点及其在繁殖器官中定位

任有蛇#,郭丽娜#,张春香*,张国林,夏龙钢,乔利英,靳黎,刘文忠   

  1. (山西农业大学动物科技学院,太谷 030801)
  • 收稿日期:2014-11-17 出版日期:2015-05-23 发布日期:2015-05-23
  • 通讯作者: 张春香,副教授,E-mail:zhchx66@126.com
  • 作者简介:任有蛇(1970-),男,山西岢岚人,副教授,博士,主要从事动物繁殖调控研究,E-mail:rys925@126.com;郭丽娜(1987-),女,河南安阳人,硕士生,主要从事动物繁殖调控研究,E-mail:guolina5188@163.com。任有蛇和郭丽娜为共同第一作者
  • 基金资助:

    山西省科技攻关计划项目(20110311029;20130311025-2)

Expression Characteristics of Lcn 5 and Its Localization in Reproduction Organ of Bucks

REN You-she#,GUO Li-na#,ZHANG Chun-xiang*,ZHANG Guo-lin,XIA Long-gang,QIAO Li-ying,JIN Li,LIU Wen-zhong   

  1. (College of Animal Science and Veterinary Medicine,Shanxi Agricultural University,Taigu 030801,China)
  • Received:2014-11-17 Online:2015-05-23 Published:2015-05-23

摘要:

为探明附睾视黄酸结合蛋白5(Lcn 5)mRNA在公山羊体组织及不同月龄附睾中的表达特性,及其在睾丸、附睾和精子中的定位。采用实时荧光定量PCR方法检测18种组织和不同月龄附睾Lcn 5 mRNA表达规律;利用蛋白印迹技术对成年公羊睾丸和附睾Lcn 5蛋白表达进行定量分析;利用免疫组化技术对5月龄公羊睾丸和附睾Lcn 5进行定位,利用免疫荧光技术对精子Lcn 5进行定位。Lcn 5 mRNA在不同组织中均有表达,其中在性腺中的表达量最高,附睾头>附睾尾>附睾体>睾丸;在5月龄前附睾的Lcn 5 mRNA表达量随月龄逐渐升高,5月龄时达到最高,随后又逐渐降低。Western blotting 结果显示,Lcn 5蛋白表达量:附睾头>附睾尾>附睾体>睾丸,支持了Lcn 5 mRNA定量的结果。免疫组化结果显示,5月龄山羊在附睾管壁的柱状细胞、纤毛细胞检测到较强Lcn 5蛋白表达的阳性信号,附睾尾管腔检测到较强的阳性信号。在睾丸各级生精细胞中也检测到了微弱阳性信号。Lcn 5蛋白包裹在精子头部顶体帽上。Lcn 5在山羊附睾中高度表达,其表达具有时空特异性,推测其在精子成熟和维持正常生理功能方面发挥重要作用,其生物学功能需要进一步深入研究。

Abstract:

This study was conducted to investigate the expression characteristics of Lcn 5 mRNA and its protein localization in testes,epididymis in 5-month-old bucks and spermatozoa in adult bucks.Relative expressions of Lcn 5 mRNA were detected by real-time fluorescent quantitative PCR in 18 different tissues and epididymis at different ages.The expression of Lcn 5 protein was detected by Western blotting.The localization of Lcn 5 protein in testis and epididymidis were examined by immunohistochemistry,and in spermatozoa by immunofluorescence assay.The results of qRT-PCR showed that Lcn 5 mRNA was expressed in all tissues detected,which had higher levels in reproductive tissues than in other tissues.The order of expression levels in reproductive tissues:caput>cauda>corpus>testis.The expression of Lcn 5 mRNA in epididymis was increased with the increase of age before 5 months old,which was the highest at age of 5 months and was decreased subsequently.The results of Western blotting analysis showed order of the protein of Lcn 5 caput >cauda>corpus> testis,which verified the results of qRT-PCR.Immunohistochemistry results showed that there were strong positive signal in columnar epithelium of epididymis,and weak positive signal in testis.Lcn 5 protein was located on the sperm acrosome surface.Lcn 5 mRNA was highly expressed in epididymis,while was time-special and region-special expression.Lcn 5 was coated on sperm acrosome surface,which maybe play an important role in sperm maturation and capacitation process.Therefore,the functions need further research.

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