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Cerebral heme oxygenase 1 and 2 spatial distribution is modulated following injury from hypoxia-ischemia and middle cerebral artery occlusion in rats

Citation

Sutherland, BA and Rahman, RM and Clarkson, AN and Shaw, OM and Nair, SM and Appleton, I, Cerebral heme oxygenase 1 and 2 spatial distribution is modulated following injury from hypoxia-ischemia and middle cerebral artery occlusion in rats, Neuroscience Research, 65, (4) pp. 326-334. ISSN 0168-0102 (2009) [Refereed Article]

Copyright Statement

Copyright 2009 Elsevier Ireland Ltd and the Japan Neuroscience Society

DOI: doi:10.1016/j.neures.2009.08.007

Abstract

The regional and cellular distribution of heme oxygenase (HO)-1 and -2 following cerebral ischemia has not been ascertained. Employing the transient middle cerebral artery occlusion (MCAO) and hypoxia-ischemia (HI) models of unilateral brain injury, the aim was to elucidate immunolocalization of HO-1 and HO-2. Animals were sacrificed 3 days post-ischemia and immunohistochemistry and Western blotting were utilized to determine HO-1 and HO-2 expression. In the ipsilateral hemisphere following HI, HO-1 immunoreactivity was significantly upregulated in many neuronal and glial populations (including the cortex, hippocampus and thalamus). HO-1 was also detected in macrophages/microglia within the infarct. In addition to widespread neuronal HO-2 labelling, HO-2 was also expressed in vascular endothelial cells. Inflammatory cells within the infarct of MCAO and HI animals were surprisingly immunoreactive for HO-2, but only HI animals had significantly elevated HO-2 protein expression in the ipsilateral hemisphere. This may be due to the presence of global hypoxia in the HI model which can upregulate vascular endothelial growth factor and subsequent proliferation of endothelial cells. This report of HO-2 protein expression upregulation following HI coupled with an increase in HO-1 immunoreactivity suggests that this response may be implicated in reducing cell death or repairing damage induced by cerebral ischemia.

Item Details

Item Type:Refereed Article
Keywords:brain, heme oxygenase, hypoxia-ischemia, immunohistochemistry, middle cerebral artery occlusion, stroke
Research Division:Medical and Health Sciences
Research Group:Neurosciences
Research Field:Central Nervous System
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Medical and Health Sciences
Author:Sutherland, BA (Dr Brad Sutherland)
ID Code:113420
Year Published:2009
Web of Science® Times Cited:19
Deposited By:Office of the School of Medicine
Deposited On:2016-12-22
Last Modified:2017-05-11
Downloads:0

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