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乙肝病毒S蛋白诱导人精子凋亡的分子机制

康祥锦1,丁   悦1,杨    洁1,杜红姿1,刘见桥1,黄天华2,*   

  1. 广州医科大学附属第三医院生殖医学中心,广东省生殖医学重点实验室,广东省产科重大疾病重点实验室,广东省普通高校生殖与遗传重点实验室,广东  广州  510150
  • 收稿日期:2014-11-19 修回日期:2014-12-16 出版日期:2015-01-31 发布日期:2015-01-31
  • 通讯作者: 黄天华,E-mail: thhuang@stu.edu.cn
  • 作者简介:康祥锦,E-mail:kangxiangjin@163.com
  • 基金资助:

    国家自然科学基金项目(81401254);广东省人口和计划生育委员会资助项目(20133064);广州市荔湾区科技和信息化局资助项目(20131215083);广州医科大学博士启动资金(2012C52)

Study of the mechanisms  of human sperm apoptosis  by hepatitis B virus S protein

KANG Xiangjin1,DING Yue1,YANG Jie1,DU Hongzi1,LIU Jianqiao1,HUANG Tianhua2,*   

  1. Center for Reproductive Medicine, Third Affiliated Hospital of Guangzhou Medical University, Key Lab for Reproductive Medicine of Guangdong Province, Key Lab for Major Obstetric Diseases of Guangdong Province, Key Lab of Reproduction and Genetics of Guangdong Higher Education Institute, Guangzhou 510150
  • Received:2014-11-19 Revised:2014-12-16 Online:2015-01-31 Published:2015-01-31

摘要:

目的: 探讨乙肝病毒S蛋白(HBs)诱导人精子凋亡的分子机制。方法:人精子与不同浓度(0、25、50、100 μg/mL)HBs共孵育3 h后,应用Annexin V-FITC/PI双染法检测HBs对精子早期凋亡指标磷脂酰丝氨酸外翻情况,用流式细胞术检测精子细胞内半胱氨酸蛋白酶-3、-8、-9(Caspase-3、-8、-9)活化,用TUNEL结合流式细胞术检测精子DNA的损伤。结果:人精子与25~100 μg/mL HBs共孵育3 h后,Annexin V-FITC+/PI-精子,Caspase-3、-8、-9阳性精子,TUNEL阳性精子的比率均显著高于对照组(P<0.05或P<0.01),且均呈剂量依赖趋势。结论:25~100 μg/mL HBs可诱发人精子胞膜磷脂酰丝氨酸外翻,胞内Caspase-3、-8、-9激活和DNA损伤,从而致使人精子凋亡以影响精子的功能。

关键词: HBs, 凋亡, 胞膜完整性, 精子功能

Abstract:

OBJECTIVE: To explore the mechanisms of human sperm apoptosis by hepatitis B virus S protein. METHODS:After the co-incubation of sperms with 0,25,50 and 100 μg/mL HBS for 3 h,the externalization of membrane phosphatidylserine (PS);Caspase-3,-8,-9 activation and DNA fragmentation of human sperm were assessed. RESULTS:After incubation,the average rates of Annexin V–positive/propidium iodide (PI)-negative sperm,Caspase-3,-8,-9 positive sperm and TUNEL-positive sperm were significantly increased in the test groups as compared to those in the control groups (P<0.05 or P<0.01),and in a dose-dependent manner. CONCLUSION:HBs exposure could lead to PS externalization,activation of caspases,and DNA fragmentation,resulting in increased apoptosis of sperms and causing sperm dysfunction.

Key words: HBs, apoptosis, membrane with normal integrity, sperm function