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高压氧后处理对神经病理性疼痛大鼠脊髓组织细胞凋亡及Caspase-3 mRNA表达的影响 被引量:4

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摘要 目的探讨高压氧后处理对神经病理性疼痛大鼠脊髓组织细胞凋亡及半胱氨酸天冬氨酸蛋白酶-3(Caspase-3)表达的影响。方法成年雄性SD大鼠18只,采用随机数字表法,将其分为S、NP、H组3组(n=6)。NP组和H组采用坐骨神经慢性压迫损伤法建立神经病理性痛模型,S组仅行假手术。H组于术后1 d开始给予高压氧后处理,1次/d连续5次,S组和NP组单纯放入氧舱100 min而不接受后处理。于术后3、5、7、14 d测定机测定各组大鼠机械缩足反射阈值(MWT)和热缩足反射潜伏期(TWL)。于术后14 d测定痛阈后处死大鼠,采用流式细胞仪测定细胞凋亡情况,采用RT-PCR法测定Caspase-3 mRNA的表达,以及脊髓组织的超微结构。结果与S组比较,NP组术后各时点均MWT降低、TWL缩短,且脊髓组织细胞凋亡率增高、Caspase-3 mRNA表达上调(P<0.05)。与NP组相比,H组术后各时点均MWT升高、TWL延长,且H组脊髓组织细胞凋亡率降低、Caspase-3 mRNA表达下调(P<0.05)。S组神经元超微结构完整,各细胞器形态正常。与S组相比,NP组神经细胞核膜模糊,核内异染色质凝聚、边集。H组神经元细胞核近圆形,核膜较清楚,核内异染色质凝聚、边集少见,微环境较好。结论高压氧后处理可减轻大鼠神经病理性痛并抑制神经细胞的凋亡,其机制可能与其抑制Caspase-3 mRNA表达有关。
出处 《广东医学》 CAS CSCD 北大核心 2014年第18期2828-2830,共3页 Guangdong Medical Journal
基金 贝朗麻醉科学研究基金资助项目(编号:BBF2012-012) 广东省科技计划项目(编号:2011B061200001)
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