山茱萸提取物对脑梗死大鼠大脑皮层一氧化氮与核转录因子-κB表达的影响

目的:观察光化学法诱导脑梗死大鼠大脑皮层一氧化氮(NO)与核转录因子-κB(NF-κB)含量的变化,以及中药山茱萸提取物(主要成分为环烯醚萜苷)对其的影响.方法:大鼠预先灌胃给药7 d后,制作光化学致脑梗死模型,采用分光光度法检测脑组织中NO和一氧化氮合酶(NOS)的变化,免疫组织化学方法检测NF-κB阳性细胞数量的变化.结果:模型组与对照组相比,出现了明显的梗死灶,脑皮层NO含量与NOS活性增加,NF-κB阳性细胞数量增多.与模型组相比,山茱萸提取物能明显减小脑梗死面积,降低脑皮层NO含量和NOS活性,并显著减少NF-κB阳性细胞数量.结论:山茱萸环烯醚萜苷可通过影响脑内NO,NF-κB的水平发挥对脑梗死的治疗作用.

Effects of extract from Cornus officinalis on nitrc oxide and NF-κB in cortex of cerebral infarction rat model

OBJECTIVE: To observe the change of nitric oxide (NO) and expression of nuclear factor-kappa B (NF-kappaB) in the cortex of cerebral infarction rat induced by photochemical reaction, and study the effect of extract from Cornus officinalis (whose main ingredient is iridoid glycoside) in the course of disease. METHOD: After rats were fed with experimental drugs for 7 days, the model of cerebral infarction was induced. Spectrophotography and immunohistochemistry were used to detect the change of the content of NO, NOS and the expression of NF-kappaB in the cortex. RESULT: Compared with control group, distinct infarction was visible in the model group, and the content of NO, the activity of NOS and the positive cell number of NF-kappaB were increased obviously. Compared with model group, the extract of C. officeinalis decreased the area of infarction, the content of NO, the activity of NOS and the positive cell number of NF-kappaB. CONCLUSION: The iridoid glycoside of C. officinalis may have therapeutical effect on cerebral infarction through regulating the content of NO and NF-kappaB.