次声作用对大鼠海马PSA-NCAM表达的影响  

Effect of 16 Hz 30 dB infrasound on the expression of PSA-NCAM in the rat hippocampus

作　　者：唐晨[1] 李玲[2] 袁华[1] 陈景藻[1] 

机构地区：[1]第四军医大学西京医院康复理疗科,西安710032 [2]解放军总医院第一附属医院康复理疗科

出　　处：《中华物理医学与康复杂志》2009年第1期8-11,共4页Chinese Journal of Physical Medicine and Rehabilitation

基　　金：全军医学科学技术研究计划指令性课题(OIL07I)

摘　　要：目的 研究实验大鼠海马区多聚唾液酸神经细胞黏附因子(PSA.NCAM)经次声作用后的表达情况.方法 将96只SD大鼠随机分为次声作用组和对照组,将次声作用组大鼠暴露于16 Hz,130 dB次声环境中,2 h/d;对照组大鼠于相同时间置于次声压力舱内,但期间不给予次声干预.采用免疫组织化学染色法观察次声作用后不同时间点(次声作用后第1、7、14及21天)及次声结束后即日、第7天和第14天时大鼠海马区PSA-NCAM的表达情况.结果 大鼠海马区PSA-NCAM于次声作用1 d后即开始增加,于次声连续作用第14天时达到峰值,第21天后有所降低,但仍显著高于对照组水平(P<0.05).当停止次声作用后,发现实验大鼠海马区PSA-NCAM表达水平逐渐下降,于第14天后达到最低值,但仍显著高于对照组水平(P<0.05).结论 16 Hz 130 dB次声作用町引起大鼠海马区PSA-NCAM表达增加;当停止次声作用后,实验大鼠海马区PSA-NCAM表达随时间延长而逐渐恢复,提示次声所致脑损伤能促进神经干细胞迁移,可能与受损神经修复有关.Objective To observe the expression of polysialic acid-neural cell adhesion molecule (PSA-NCAM) in the rat hippocampus after infrasound exposure. Methods Ninety-six Sprague-Dawley rats were random-ized into a 16 Hz 130 dB infrasound exposure group (n =72) and a control group (n =24). Rats of the infrasound exposure group were exposed to 16 Hz 130 dB infrasound in a barochamber 2 h/d for 1, 7, 14 and 21 d. The rats' brains were removed and immunohistochemieal methods were used to detect the expression of PSA-NCAM in the hip-pocampus on the 1st, 7th, 14th, and 21st day during treatment and on the lat, 7th, and 14th day after the treatment ended. Results The expression of PSA-NCAM in the rats' hippocampuses increased after exposure for 1 d, reached its peak at the 14th day, then had decreased by the 21st day but remained at a higher level than in the controls (P≤ 0.05). Conclusion The expression of PSA-NCAM in the rat hippocampus is increased by exposure to 16 Hz 130 dB infrasound, but the levels recover somewhat after infrasound exposure ends. lnfrasound could induce neural injury and promote the migration of neural stem cells. PSA-NCAM might participate in the repair of neural injuries re-suiting from infrasound exposure.

关 键 词：次声 海马 神经干细胞 多聚唾液酸神经细胞黏附因子 迁移 

分 类 号：R363[医药卫生—病理学]