预吸氧对大鼠缺氧/复氧性脑损伤时脑皮质血红素氧合酶-1/一氧化氮通路的影响  被引量:1

Effects of preoxygenation on heme oxygenase-1-nitric oxide pathway of cerebral cortex in rats subjected to hypoxia-reoxygenation injury

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作  者:林洪启[1] 贾东林[2] 

机构地区:[1]河南省人民医院麻醉科,郑州450003 [2]北京大学第三医院疼痛科

出  处:《中华实验外科杂志》2015年第11期2743-2745,共3页Chinese Journal of Experimental Surgery

基  金:河南省科技厅资助课题项目(132102310216);河南省卫生厅教育课题项目(wjlx2015068)

摘  要:目的 观察预吸氧对大鼠缺氧/复氧性脑损伤脑皮质血红素氧合酶-1(HO-1)/一氧化氮(NO)通路的影响.方法 在大鼠脑缺氧复氧前30 min预吸氧30 min,测定大脑皮质HO-1蛋白表达、NO含量和超微结构的变化.结果 大鼠缺氧/复氧后大脑皮质有所损伤,表现为HO-1蛋白表达增加[(0.65±0.18)%增加到(10.50±1.83)%]、NO含量增加[(2.03±0.28) μmol/mg蛋白增加到(5.50 ±0.52) μmol/mg蛋白]和超微结构变化,预吸氧可显著加重这种损伤,HO-1蛋白表达南[(10.50±1.83)%降低到(7.14±1.35)%],NO含量由[(5.50±0.52)μmol/mg蛋白增加到(7.89±0.20)μmol/mg蛋白].结论 预吸氧可加重缺氧复氧性脑损伤,其机制与抑制HO-1蛋白表达及增加NO含量有关.Objective To investigate the effects of preoxygenation on the heme oxygenase-nitric oxide pathway of the cerebral cortex in rats subjected to hypoxia-reoxygenation injury.Methods At 30 min before hypoxia, preoxygenation was given for 30 min.The heme oxygenase-nitric oxide and ultrastructural changes of the cerebral cortex were examined.Results The cerebral cortex was injured after hypoxia-reoxygen, mainly presented by increased heme oxygenase (HO-1) protein [from (0.65 ± 0.18) % to (10.50 ± 1.83) %] and nitric oxide (NO) content [from (2.03 ± 0.28) μmol/mg protein and (5.50 ±0.52) μ mol/mg protein] , and the ultrastructural changes of the cerebral cortex (P 〈0.01).Preoxygenation could aggravate the damage of the cerebral cortex [HO-1 protein from (10.50 ± 1.83) % to (7.14 ± 1.35)% , and NO content from (5.50 ±0.52) μmol/mg protein to (7.89 ±0.20) μmol/mg protein].Conclusion Preoxygenation could aggravate the brain injury induced by hypoxia-reoxygenation probably by inhibiting the expression of HO-1 protein and increasing the NO contents.

关 键 词:预吸氧 血红素氧合酶 一氧化氮 缺氧复氧性脑损伤 

分 类 号:R742[医药卫生—神经病学与精神病学]

 

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