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Uncoupling protein-2 prevents neuronal death and diminishes brain dysfunction after stroke and brain trauma.

Abstract：

:Whereas uncoupling protein 1 (UCP-1) is clearly involved in thermogenesis, the role of UCP-2 is less clear. Using hybridization, cloning techniques and cDNA array analysis to identify inducible neuroprotective genes, we found that neuronal survival correlates with increased expression of Ucp2. In mice overexpressing human UCP-2, brain damage was diminished after experimental stroke and traumatic brain injury, and neurological recovery was enhanced. In cultured cortical neurons, UCP-2 reduced cell death and inhibited caspase-3 activation induced by oxygen and glucose deprivation. Mild mitochondrial uncoupling by 2,4-dinitrophenol (DNP) reduced neuronal death, and UCP-2 activity was enhanced by palmitic acid in isolated mitochondria. Also in isolated mitochondria, UCP-2 shifted the release of reactive oxygen species from the mitochondrial matrix to the extramitochondrial space. We propose that UCP-2 is an inducible protein that is neuroprotective by activating cellular redox signaling or by inducing mild mitochondrial uncoupling that prevents the release of apoptogenic proteins.

journal_name

Nat Med

journal_title

Nature medicine

authors

Mattiasson G,Shamloo M,Gido G,Mathi K,Tomasevic G,Yi S,Warden CH,Castilho RF,Melcher T,Gonzalez-Zulueta M,Nikolich K,Wieloch T

doi

10.1038/nm903

keywords:

subject

Has Abstract

pub_date

2003-08-01 00:00:00

pages

1062-8

issue

8

eissn

1078-8956

issn

1546-170X

pii

nm903

journal_volume

9

pub_type

杂志文章

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