Cytoprotective Effects of Transgenic Neuroglobin Overexpression in an Acute and Chronic Mouse Model of Ischemic Heart Disease

Overview

Journal Heart Vessels

Specialty Cardiology & Vascular Diseases

Date 2017 Nov 4

PMID 29098407

Citations 5

Authors

Evi Luyckx

Bert R Everaert

Bieke van der Veken

Wendy Van Leuven

Jean-Pierre Timmermans

Christiaan J Vrints

Guido R Y De Meyer

Wim Martinet

Sylvia Dewilde

Affiliations

Soon will be listed here.

Abstract

Neuroglobin (NGB) is an oxygen-binding protein that is mainly expressed in nervous tissues where it is considered to be neuroprotective during ischemic brain injury. Interestingly, transgenic mice overexpressing NGB reveal cytoprotective effects on tissues lacking endogenous NGB, which might indicate a therapeutic role for NGB in a broad range of ischemic conditions. In the present study, we investigated the effect of NGB overexpression on survival as well as on the size and occurrence of myocardial infarctions (MI) in a mouse model of acute MI (AMI) and a model of advanced atherosclerosis (ApoE Fbn1 mice), in which coronary plaques and MI develop in mice being fed a Western-type diet. Overexpression of NGB significantly enhanced post-AMI survival and reduced MI size by 14% 1 week after AMI. Gene expression analysis of the infarction border showed reduction of tissue hypoxia and attenuation of hypoxia-induced inflammatory pathways, which might be responsible for these beneficial effects. In contrast, NGB overexpression did not affect survival or occurrence of MI in the atherosclerotic mice although the incidence of coronary plaques was significantly reduced. In conclusion, NGB proved to act cytoprotectively during MI in the acute setting while this effect was less pronounced in the atherosclerosis model.

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