学术投稿

缺氧缺血新生鼠脑内血红素氧化酶-1和一氧化碳的变化

王玲;张薇;惠延平

关键词:低氧-缺血, 脑, 模型, 动物, 一氧化碳, 血红素氧化酶(脱环)
摘要:目的研究新生大鼠缺氧缺血时脑内血红素氧化酶- 1( HO- 1)和内源性一氧化碳( CO)及环化鸟苷酸( cGMP)的变化,探讨锌原卟啉( Znpp)的治疗作用.方法 7 d SD大鼠随机分为假手术对照组,缺氧缺血组( HI)及缺氧缺血+锌原卟啉组( HI+ Znpp).利用分光光度法测定血 COHb含量和脑匀浆 HO- 1活性;放免法测定脑匀浆 cGMP水平,并观察脑病理改变.结果 HI组在 1, 4, 12 h HO- 1、 cGMP、 CO水平与对照组比明显升高( P< 0.01),在 12 h达到高峰; HI+ Znpp组 HO- 1、 cGMP、 CO水平在 1, 4, 12 h均明显低于 HI组( P< 0.01),但仍高于对照组( P< 0.01).脑组织病理检查可见 HI组呈重度缺氧缺血改变,多数神经元细胞肿胀变性;而 Znpp组神经元变性者少.结论 HI后脑内 HO- 1活性明显增高导致内源性 CO和 cGMP增高, Znpp可阻抑这一病理生理过程,减轻脑损伤.
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中国组织工程研究杂志

中国组织工程研究杂志

主管:中华人民共和国卫生部

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