脑损伤昏迷大鼠中脑神经组织microRNA表达谱的变化特征

目的 检测急性脑损伤昏迷大鼠中脑神经组织中microRNA表达谱的变化特征.方法采用正中液压脑损伤致伤体系,对大鼠进行中等力度致伤,伤后1 h取大鼠中脑组织,经RNA抽提检测后,利用表达谱芯片进行检测,扫描杂交结果并对荧光强度进行标准化后行统计分析. 结果 芯片杂交结果表明,损伤昏迷大鼠中脑节段脑组织中,33种microRNA表达上调,38种microRNA表达下降. 结论 损伤昏迷大鼠中脑神经组织中microRNA的表达谱出现特征性变化,可能为损伤昏迷的致伤机制,也可能是昏迷保护的神经生物学途径.

Expression changes of microRNA array in mesencephalon of rats with traumatic coma

Objective To set up a rat model with acute traumatic coma and identify the variation of microRNA in mesencephalon. Methods After rats were injured moderately by central fluid percussion system, tissues of the mesencephalon were removed one hour after injury. RNA of brain tissue of the mesencephalon was isolated for microRNA array by using the exiqon microarray system. The data were analyzed statistically by Genepix Pro 6.0 after hybridization results were scanned and fluorescence intensity standardized. Resets Hybridization results showed 33 microRNAs with up-regulated expressions but 38 microRNAs with down-regulated activity. Conclusion Expression of microRNA array shows marked changes in the tissues of the mesencephalon in rats with traumatic coma, as may be injury mechanism of traumatic coma and also a way of neurobiological protection of coma.