Linked Life Data

17727265

Source:http://linkedlifedata.com/resource/pubmed/id/17727265

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pubmed-article:17727265pubmed:abstractTextTransient global brain ischemia induced by cardiac arrest and resuscitation (CAR) results in reperfusion injury associated with oxidative stress. Oxidative stress is known to produce delayed selective neuronal cell loss and impairment of brainstem function, leading to post-resuscitation mortality. Levels of 4-hydroxy-2-nonenal (HNE) modified protein adducts, a marker of oxidative stress, was found to be elevated after CAR in rat brain. In this study we investigated the effects of an antioxidant, alpha-phenyl-tert-butyl-nitrone (PBN) on the recovery following CAR in the aged rat brain. Male Fischer 344 rats (6, 12 and 24-month old) underwent 7-minute cardiac arrest before resuscitation. Brainstem function was assessed by hypoxic ventilatory response (HVR) and HNE-adducts were measured by western blot analysis. Our data showed that in the 24-month old rats, overall survival rate, hippocampal CAl neuronal counts and HVR were significantly reduced compared to the younger rats. With PBN treatment, the recovery was improved in the aged rat brain, which was consistent with reduced HNE adducts in brain following CAR. Our data suggest that aged rats are more vulnerable to oxidative stress insult and treatment with PBN improves the outcome following reperfusion injury. The mechanism of action is most likely through the scavenging of reactive oxygen species resulting in reduced lipid peroxidation.lld:pubmed
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pubmed-article:17727265pubmed:authorpubmed-author:LaMannaJoseph...lld:pubmed
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pubmed-article:17727265pubmed:year2007lld:pubmed
pubmed-article:17727265pubmed:articleTitleIncreased sensitivity to transient global ischemia in aging rat brain.lld:pubmed
pubmed-article:17727265pubmed:affiliationCase Western Reserve University, Cleveland, Ohio 44106, USA.lld:pubmed
pubmed-article:17727265pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:17727265pubmed:publicationTypeResearch Support, N.I.H., Extramurallld:pubmed
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