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巨噬细胞髓过氧化物酶与低密度脂蛋白氧化关系的研究
免疫学杂志 2001年第1期第17卷 基础免疫学
作者:武军驻 洪嘉玲
单位:湖北医科大学生化教研室,湖北 武汉 430071
关键词:巨噬细胞;髓过氧化物酶;低密度脂蛋白;牛磺酸
摘 要:目的 从低密度脂蛋白(LDL)诱导巨噬细胞髓过氧化物酶活性升高的角度探讨体内LDL氧化的可能机制,为动脉粥样硬化(AS)的抗氧化治疗提供新的思路。方法 以体外培养的大鼠腹腔巨噬细胞为模型,通过髓过氧化物酶活性、LDL的氧化产物和细胞内胆固醇含量的测定,研究巨噬细胞髓过氧化物酶活性变化与LDL氧化及细胞内胆固醇积累的相关性。结果 LDL作用于巨噬细胞,能促进巨噬细胞内及分泌的髓过氧化物酶活性升高,且有浓度依赖性;随着髓过氧化物酶活性的升高,LDL的氧化增强,且在血红素毒性剂叠氮钠的作用下,髓过氧化物酶活性受到抑制,同时LDL的氧化减弱;次氯酸的清除剂牛磺酸可防止LDL的氧化和巨噬细胞内胆固醇的积累。结论 LDL诱导巨噬细胞髓过氧化物酶活性升高从而加强自身的氧化吸收。
分类号:R392.1;R541.402 文献标识码:A
文章编号:1000-8861(2001)01-0037-03
Study on the effect of macrophage-myeloperoxidase in process of LDL oxidation
WU Jun-zhu(Department of Biochemistry,Hubei Medical University,Wuhan 430071,China)
HONG Jia-ling(Department of Biochemistry,Hubei Medical University,Wuhan 430071,China)
Abstract:Objective To investigate the effect of macrophage-myeloperoxidase on LDL oxidation. Methods Based on the model of rat macrophage,we investigated the relation between macrophage-myeloperoxidase and LDL oxidation by measuring macrophage-myeloperoxidase activation,LDL oxidation products and cell cholesterol.Results LDL promoted cell and secretive myeloperoxidase activation which was concentration-dependent with LDL;with elevation of myeloperoxidase activation,LDL oxidation increased and NaN3 inhibited this effect;taurine partially protected against LDL oxidation by HOCl,and protected against accumulation of cell cholesterol.Conclusion LDL induced the elevation of macrophage-myeloperoxidase to enhance its own oxidation and absorption.
Keywords:macrophage;myeloperoxidase;low density lipoprotein;taurine
作者简介:武军驻(1971-),男,内蒙古呼和浩特市,讲师,博士生,主要从事动脉硬化的分子机制的研究。Tel:(027)87331907; E-mail:wujzh46@hotmail.com参考文献:
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收稿日期:2000年9月1日
修稿日期:2000年9月13日
出版日期:2001年1月15日