中国畜牧兽医

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炔雌醚暴露对幼年小鼠睾丸发育及增殖细胞核抗原、半胱氨酸蛋白酶-3表达的影响

张飞虎1,李健1,靳冠通1,王宏伟1,周变华1,刘妍妍2,黄春阳1,赵文鹏1   

  1. (1.河南科技大学动物科技学院,河南洛阳 471003;2.中国科学院心理研究所脑与认知科学国家重点实验室,北京 100101)
  • 收稿日期:2013-07-10 出版日期:2014-03-20 发布日期:2014-05-15
  • 通讯作者: 李健(1980—),男,安徽人,博士,讲师,研究方向:生殖毒理学。E-mail: lijian800702@126.com
  • 作者简介:张飞虎(1993—),男,河南人,学士,研究方向:生殖毒理学。
  • 基金资助:

    河南科技大学博士研究启动基金(09001515);河南科技大学实验技术开发基金项目(SY1011024、SY1213061);河南科技大学SRTP项目(2013249);国家级大学生创新创业训练计划项目(201310464065)。

Effects of Quinestrol on the Testes Development and Expression of PCNA and Caspase-3 in Juvenile Mice

ZHANG Fei-hu1, LI Jian1, JIN Guan-tong1, WANG Hong-wei1, ZHOU Bian-hua1, LIU Yan-yan2, HUANG Chun-yang1, ZHAO Wen-peng1   

  1. 1. College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471003, China;2. State Key Laboratory of Brain and Cognitive Science, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China)
  • Received:2013-07-10 Online:2014-03-20 Published:2014-05-15

摘要: 本研究采用组织学和免疫组织化学方法探讨炔雌醚暴露对幼年小鼠睾丸生精细胞增殖与凋亡相关蛋白增殖细胞核抗原(PCNA)、半胱氨酸蛋白酶-3(Caspase-3)表达的影响。将20只4周龄雄性昆明小鼠随机分为4组,适应饲养1周后分别腹腔注射50 μL含0、1、10、100 mg/kg体重炔雌醚的橄榄油,每天1次,连续1周。小鼠8周龄时,取睾丸称重并制备组织切片,HE染色观察病理学变化,免疫组织化学法测定睾丸组织PCNA、Caspase-3的表达。结果显示,曲精小管的管壁变薄,生精细胞排列紊乱,细胞分层减少,间隙增大,管腔内有大量异常脱落的精母细胞和圆形精子细胞,少见长形精子细胞和精子。与对照组相比,PCNA表达随着炔雌醚剂量的增加而极显著减少(P<0.01),Caspase-3的表达随着炔雌醚剂量的增加而极显著增加(P<0.01)。结果表明,炔雌醚通过调节相关蛋白的表达,抑制生精细胞增殖,促进生精细胞凋亡,从而造成雄性生殖功能损伤。

关键词: 生精细胞; 炔雌醚; 增殖; 凋亡

Abstract: This experiment was aimed to study the effect of quinestrol on the expression of PCNA and Caspase-3 in spermatogenic cells of juvenile mice. 4-week old male mice were randomly divided into four groups. Mice in the control group were injected intraperitoneally with olive oil alone and mice in the experiment groups were injected intraperitoneally with octylphenol resolved in olive oil at 1, 10, 100 mg/kg doses respectively for 1 week (once a day). The testes were immediately removed for weighing and serial cross-sections that were used for histological examination when the mice were 8-week-old. The expressions of PCNA and Caspase-3 in spermatogenic cells were determined by immunohistochemical method. The results showed that the thickness of the convoluted seminiferous tubule decreased, cellular deranged, cell layers decreased and intercellular space increased. Meanwhile, there were a large number of abnormal shedding of spermatocytes and round spermatids, but few elongated spermatids and spermatozoa. The expression of PCNA extremely significantly decreased and the expression of Caspase-3 extremely significantly increased as quinestrol dose increased (P<0.01). Quinestrol caused male reproductive function injury through inhibiting proliferation and promoting apoptosis in spermatogenic cells by regulating the expression of associated proteins.

Key words: spermatogenic cell; quinestrol; proliferation; apoptosis