慢性噪声暴露对大鼠行为学及海马区5-HT1A受体表达的影响

The Effects of Chronic Noise Exposure on the Behavior Changes and the Expression of 5-HT1AR in the Hippocampus in Rat

王文静;廖华;刘行;杨琨;杨希林;

1:武汉大学人民医院耳鼻咽喉头颈外科

摘要
目的观察慢性噪声暴露对大鼠行为学及其海马区5-HT1A受体(5-HT1AR)表达的影响,探讨噪声暴露对精神行为的影响及听觉系统与边缘系统的关系。方法将18只健康成年大鼠随机分为对照组和噪声组,每组9只。对照组不予任何处理;噪声组于每天同一时间给予中心频率为4kHz、声强为100dB SPL的宽带白噪声持续暴露4小时,共28天。分别于实验前1天和第28天对两组大鼠行ABR检测、糖水偏爱实验、体重和摄食量的检测,于实验前1天、第14天和第28天观察大鼠的旷场行为变化,并于第28天完成ABR测试后,快速分离大鼠海马组织,采用Western-Blot和免疫组化方法检测大鼠海马区5-HT1AR的表达。结果实验前1天两组ABR反应阈、体重及摄食量、糖水偏爱及旷场行为均无差异(P>0.05);实验第28天,噪声组大鼠的ABR反应阈(69.44±4.97dB SPL)较对照组(32.22±2.48dB SPL)明显升高(P<0.05);噪声组大鼠糖水偏爱程度、体重和摄食量较对照组明显降低,差异有统计学意义(均为P<0.05);实验第14、28天噪声组的旷场行为较对照组明显减少(均为P<0.05);噪声组大鼠海马5-HT1AR的表达较对照组明显降低(P<0.05)。结论慢性噪声暴露会导致大鼠海马区5-HT1AR表达下降,出现抑郁样行为学表现,提示了听觉系统与边缘系统的相关性。
关键词
噪声;抑郁;5-HT1AR;海马
基金项目(Foundation):
国家自然科学基金青年基金(81100712);; 湖北省自然科学基金面上项目资助(220100653)
作者
王文静;廖华;刘行;杨琨;杨希林;
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王文静廖华刘行杨琨杨希林