Heme oxygenase 2 is neuroprotective against intracerebral hemorrhage

被引：91

作者：

Wang, Jian

Zhuang, Hean

Dore, Sylvain

机构：

[1] Johns Hopkins Univ, Sch Med, Dept Anesthesiol Crit Care Med & Neurosci, Baltimore, MD 21205 USA

[2] Johns Hopkins Univ, Sch Med, Dept Neurosci, Baltimore, MD 21205 USA

来源：

NEUROBIOLOGY OF DISEASE | 2006年 / 22卷 / 03期

关键词：

blood; hemin; ischemia; mouse; stroke; intracerebral hemorrhage;

D O I：

10.1016/j.nbd.2005.12.009

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

Recent studies suggest a neuroprotective function for heme oxygenase 2 (HO2) in acute brain injury and ischemia. HO2, the main enzyme to degrade the pro-oxidant heme, was tested for its neuroprotective ability in postnatal neuronal cell cultures and in a model of collagenase-induced intracerebral hemorrhage. Genetic deletion of HO2 rendered cultured neurons 32% (P < 0.01) more vulnerable to hemin-induced toxicity, increased brain injury volume in mice by 30% (P < 0.05) at day 1 and by 67% (P < 0.05) at day 3, and worsened neurologic functions by 26% (P < 0.05) at day I and by 38% (P < 0.05) at day 3 following exposure to free heme liberated from hemorrhage. Together, these findings suggest that HO2 is a crucial neuroprotective enzyme in detoxifying high levels of heme from the brain and that further work is warranted to investigate potential therapeutic strategies that target HO2 in intracerebral hemorrhage. (c) 2006 Elsevier Inc. All rights reserved.

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收藏

页码：473 / 476

页数：4

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