Document Detail


Natural course of iron delocalization and lipid peroxidation during the first eight hours following a 15-minute cardiac arrest in dogs.
MedLine Citation:
PMID:  3662177     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Lipid peroxidation is thought to be a major contributing factor in neurological injury following cardiac arrest. Because iron availability is a prerequisite for lipid peroxidation, this experiment was designed to examine the natural time course of iron release, lipid peroxidation, and cerebral polyunsaturated fatty acid content following a 15-minute cardiac arrest in dogs. Large mongrel dogs were anesthetized with ketamine and halothane and divided into three groups of five each. In two groups, cardiac arrest was induced with KCl. After 15 minutes of cardiac arrest, the dogs were resuscitated by five minutes of internal cardiac massage, epinephrine, bicarbonate, and internal defibrillation. All ten dogs were resuscitated and supported by a standard intensive care protocol until tissue harvest. A 3-g portion of parietal cerebral cortex was obtained from the nonischemic dogs (n = 5), or at two hours (n = 5), or eight hours (n = 5) after resuscitation. Total tissue iron was measured by an atomic emission spectrometer; low molecular weight species (LMWS) iron by the o-phenanthroline test on an ultrafiltered sample; and lipid peroxidation by both the thiobarbituric acid test (TBARS) and determination of the tissue content of lipid double bonds, calculated by first fractionating the lipids by gas-liquid chromatography and then measuring the double bonds in each fraction by spectrometry and summing the results. Univariate ANOVA demonstrated all variables except total tissue iron to have significance at P less than .02. At two hours of reperfusion, LMWS iron and TBARS were significantly elevated above nonischemic control levels.(ABSTRACT TRUNCATED AT 250 WORDS)
Authors:
G S Krause; N R Nayini; B C White; T J Hoenher; A M Garritano; B J O'Neil; S D Aust
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Annals of emergency medicine     Volume:  16     ISSN:  0196-0644     ISO Abbreviation:  Ann Emerg Med     Publication Date:  1987 Nov 
Date Detail:
Created Date:  1987-11-18     Completed Date:  1987-11-18     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  8002646     Medline TA:  Ann Emerg Med     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1200-5     Citation Subset:  AIM; IM    
Affiliation:
Department of Surgery, Wayne State University School of Medicine, Detroit, Michigan.
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MeSH Terms
Descriptor/Qualifier:
Animals
Brain / metabolism*
Brain Ischemia / metabolism
Cell Survival
Dogs
Heart Arrest / metabolism*
Iron / metabolism*
Membrane Lipids / metabolism*
Molecular Weight
Oxidation-Reduction
Phospholipids / metabolism*
Chemical
Reg. No./Substance:
0/Membrane Lipids; 0/Phospholipids; 7439-89-6/Iron

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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