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• 基础研究 • 上一篇    下一篇

强次声对豚鼠耳蜗毛细胞超微结构的影响

张桂茹1, 杜宝东1, 王晓明2, 王海涛1, 孙 乐1   

  1. 1. 吉林大学第一医院耳鼻咽喉-头颈外科, 吉林 长春130021;2. 吉林大学第一医院检验科,吉林 长春130021
  • 收稿日期:2003-06-16 修回日期:1900-01-01 出版日期:2005-03-28 发布日期:2005-03-28

AInfluences of intense infrasound on ultrastructures of hair cells of cochlea in guinea pigs

ZHANG Gui-ru1, DU Bao-dong1, WANG Xiao-ming2,WANG Hai-tao1,Sun Le1   

  1. 1. Department of Otolaryngology and Head-Neck Surgery, First Hospital, Jilin University, Changchun 130021,China;2. Department of Laboratory, First Hospital,Jilin University, Changchun 130021,China
  • Received:2003-06-16 Revised:1900-01-01 Online:2005-03-28 Published:2005-03-28

摘要: 目的:观察强次声对豚鼠耳蜗毛细胞超微结构的影响。 方法:将30只豚鼠分5组,1组作对照, 其余4组分别暴露于8和12 Hz, 声压极为120及130 dB SPL的次声声场中, 每日持续5 h,连续给声4 d。 应用透射电镜观察次声对豚鼠耳蜗毛细胞超微结构的损伤。 结果:强次声暴露后的4组动物耳蜗毛细胞出现一些损伤变化:表现为线粒体空泡样变性,线粒体嵴紊乱,细胞核膨胀或固缩等。 损伤特点为外毛细胞损伤, 而内毛细胞正常;130 dB SPL组比120 dB SPL组损伤明显;12 Hz组与8 Hz组损伤无明显差别。结论:强次声波对豚鼠耳蜗毛细胞造成不同程度的损伤。

关键词: 耳蜗, 病理学, 显微镜检查, 电子, 扫描透射, 豚鼠

Abstract: Objective To study the influences of intense infrasound on the ultrastructural changes of the hair cells of cochlea in guinea pigs with electron microscope. Methods Thirty guinea pigs were randomly divided into five groups: control group and 4 experimental groups. The guinea pigs in experimental groups were individually exposed to 8 Hz, 12 Hz, 120 dB SPL, and 130 dB SPL in a reverberant chamber. The animals were scarified for 5 h, once a day for 4 consecutive days. The influences of intense infrasound on the ultrastructural changes of hair cells of cochlea in guinea pigs were observed by transmission electron microscope. Results The hair cells of cochlea in all experimental groups were damaged to different extent including mitochondrion denaturation, nucleus expansion, and karyopyknosis. The outer hair cells were damaged remarkably, but inner hair cells were nomal; the hair cells in 130 dB SPL group were significantly damaged compared with 120 dB SPL group. There was no difference of damage of hair cells between 12 Hz group and 8 Hz group. Conclusion The intense infrasound can cause damages with different extent to the ultrastructures of hair cells of cochlea in guinea pigs.

Key words: cochlea, pathology, microscopy, electron, scanning transmission, guinea pigs

中图分类号: 

  • R-332