C57BL/6J小鼠初级听皮层神经元凋亡与caspase-3表达的年龄相关性改变

The Age-related Changes of the Expression of Caspase-3 and the Apoptosis States of Neurons in Primary Auditory Cortex(AI) of C57BL/6J Mice

李洪波;陈继川;姬长友;

1:第三军医大学附属大坪医院野战外科研究所耳鼻咽喉-头颈外科

摘要
目的探讨不同月龄C57BL/6J小鼠初级听皮层中caspase-3的表达及初级听皮层神经元凋亡情况,探讨两者之间的关系以及caspase-3、凋亡在老年性聋发生、发展中的作用。方法分别选取2月龄(15~20克)和10月龄(45~60克)C57BL/6J小鼠各15只,免疫组织化学法染色检测两组C57BL/6J小鼠初级听皮层caspase-3的表达情况,末端转移酶介导的原位缺口末端标记染色(TUNEL)技术检测两组小鼠初级听皮层神经元凋亡状况。结果与2月龄组C57BL/6J小鼠相比,10月龄组C57BL/6J小鼠初级听皮层中caspase-3的表达显著增多,初级听皮层神经元凋亡数目明显增多(P值均<0.01),且caspase-3的表达与神经元的凋亡呈正相关(r=0.5202)。结论caspase-3的表达可能在老年性聋的发生、发展过程中起重要作用,它参与了小鼠初级听皮层神经元的凋亡调控过程,可能是老年性聋的发病机制中一个重要因素。
关键词
caspase-3;初级听皮层;凋亡;听力减退;年龄相关
基金项目(Foundation):
国家自然科学基金资助(30872861)
作者
李洪波;陈继川;姬长友;
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