摘要
目的观察豚鼠耳蜗毛细胞静纤毛连接桥的超微结构和功能。方法借助单宁酸样品处理技术,用扫描电镜观察了豚鼠耳蜗毛细胞静纤毛的超微结构。结果豚鼠耳蜗外毛细胞的静纤毛之间存在着侧面连接桥,这些连接桥呈水平走向,将每一个毛细胞上的同一排和不同排的静纤毛连接起来。第1圈到第4圈外毛细胞静纤毛上均可观察到侧面连接桥。排列整齐,结构完整的静纤毛之间的连接桥就比较多。静纤毛排列紊乱时,这些连接桥就比较少。第1圈和第4圈毛细胞静纤毛的侧面连接桥多一些,而第2圈和第3圈毛细胞静纤毛的连接桥就少一些。静纤毛表面的小泡状结构多时,静纤毛之间的连接桥也就多一些,静纤毛表面的小泡状结构少时,静纤毛之间的连接桥也就少一些。结论耳蜗毛细胞静纤毛的侧面连接桥是一个独立的形态学结构,它在维持耳蜗毛细胞静纤毛束的结构和功能的完整性方面起重要作用。
Objective To investigate the structure and function of cross-links on stereocilia ot guinea pig outer hair cell （OHC）. Method The ultrastructures of cros-links on stereocilia of guinea pig OHC were observed by scanning electron microscopy and tannic acid procedures. Results The side-links ran horizontally between OHC stereocilia. The stereocilia of the same and different row on each hair cell were joined by horizontally-running links. The side-links were observed in the first turn as well as the fourth turn. There were more side-links on the intact stereocilia than that on the disrupted arrangement. The side-links in the first turn and the fourth turn were more abundant than that in the second turn and the third turn. The side-links between stereocilia were spare if the stereocilia were separated. The number of side-links on stereocilia was proportional to the number of bulb-like structures on stereocilia. Conclusion The side-link is a kind of morphological structure on hair cells stereocilia of cochlea. The results suggest that cross-links play an important role in maintaining the structure and function of the hair cell stereocilia.
出处
《解放军医学杂志》
CAS
CSCD
北大核心
2005年第11期993-994,共2页
Medical Journal of Chinese People's Liberation Army
关键词
静纤毛
连接桥
传导
耳蜗毛细胞
豚鼠
stereocilium
cross link
transduction
cochlear hair cell
guinea pigs
