Role of outer dense fiber in multiple morphological abnormalities of the sperm flagella in Akap4 gene defect mice

Linglong Huang, Peng Huang

Research output: Contribution to journalArticle

Abstract

目的:探讨外层致密纤维(outer dense fobres,ODF)在Akap4基因缺陷引起小鼠精子尾部多种形态异常中的作用。方法:通过基因编辑技术构建Akap4基因缺陷小鼠模型。实验分为2组:成年Akap4基因缺陷雄鼠为实验组(n=7),成年野生型雄鼠为对照组(n=7),比较2组小鼠的体重和睾丸重量;采用计算机辅助精液分析(computer aided sperm analysis,CASA)检测精子活动力,改良巴氏染色(modified pap staining)检测精子形态学,扫描及透射电镜观察精子超微结构,免疫荧光检测精子尾部蛋白表达及定位,睾丸切片HE及PAS染色检测睾丸生精功能,透射电镜观察曲精细管超微结构。结果: Akap4基因缺陷小鼠精子总活动力为8.81%,明显低于野生型小鼠(P<0.01),且无正常形态精子,尾部缩短与尾部卷曲比例达91.18%,明显高于野生型小鼠(P<0.01),睾丸重量、睾丸生精功能、精子数量2组比较差异无统计学意义(P>0.01); Akap4基因缺陷精子的纤维鞘纵柱缺失,横肋柱结构部分残留,主段的3和8号ODF排列紊乱,与ODF2蛋白定位结果相符;睾丸中精子纤维鞘发育障碍,无正常纤维鞘结构形成,但未见异常膨大的精子尾部。结论:Akap4基因缺陷使纤维鞘横肋发育不良,纵肋的缺失引起3和8号ODF分离,“9+2”微管结构紊乱,使主段管腔异常膨大,导致小鼠精子尾部多种形态异常。.

Original languageEnglish
Pages (from-to)1367-1375
Number of pages9
JournalZhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences
Volume44
Issue number12
DOIs
Publication statusPublished - Dec 28 2019
Externally publishedYes

ASJC Scopus subject areas

  • Medicine(all)

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