出生后不同发育阶段小鼠耳蜗Connexin30的表达

Expression of Connexin30 (Cx30) in the Postnatal Mouse Cochlear

刘文静;王文;王旭东;杨军;

1:东南大学附属中大医院耳鼻咽喉头颈外科

2:皖南医学院弋矶山医院耳鼻咽喉头颈外科

3:上海交通大学医学院附属新华医院耳鼻咽喉头颈外科

摘要
目的研究缝隙连接蛋白30(Connexin30,Cx30)在出生后不同发育阶段小鼠耳蜗的表达分布,探讨其在听觉系统中的功能。方法选取出生后(postnatal day, P)1、5、7、10、14、21及30天即P1、P5、P7、P10、P14、P21和P30,共7个天龄段的小鼠,每组6只,通过免疫荧光染色和激光共聚焦显微镜检测Cx30在不同天龄小鼠耳蜗中的表达定位。结果 P1组Cx30主要表达在大上皮嵴及耳蜗外侧壁;P5组Cx30广泛表达在血管纹基底细胞,螺旋缘出现Cx30的表达;P7组Corti器Deiters细胞开始表达Cx30;P10组Cx30表达在内凹细胞;P14组Cx30在大上皮嵴的表达消失,大部分螺旋韧带纤维细胞出现Cx30的表达;P21和P30组Cx30表达于Corti器支持细胞、血管纹基底细胞、螺旋韧带纤维细胞和螺旋缘。与P5组相比较,P7、P10、P14、P21和P30组耳蜗螺旋缘Cx30平均光密度值增高(P<0.05);与P7组相比,P10、P14、 P21和P30 Deiters细胞Cx30平均光密度值明显增高(P<0.05);与P1组比较,P5、P7、P10、P14、 P21和P30血管纹中Cx30平均光密度值均增高(P<0.05)。结论 Cx30在不同鼠龄小鼠耳蜗表达和分布不同,其可能对小鼠听觉功能的建立和成熟具有十分重要的作用。
关键词
缝隙连接蛋白30;小鼠;耳蜗;发育
基金项目(Foundation):
国家自然科学基金项目(82000987);; 东南大学基本科研业务费资助项目(基础科研扶持项目-理工类2242020K40162)
作者
刘文静;王文;王旭东;杨军;
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缝隙连接蛋白30小鼠耳蜗发育

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刘文静王文王旭东杨军