Document Detail


Histamine release during intestinal ischemia-reperfusion: role of iron ions and hydrogen peroxide.
MedLine Citation:
PMID:  1723354     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Reactive oxygen intermediates (ROI) play a major role in the mucosal damage developing during the reperfusion period following intestinal ischemia. We have shown previously that histamine (H) release is related to the ROI generated by xanthine oxidase during intestinal ischemia-reperfusion. The present study sought to determine the possible chain of events leading to H liberation. The artery supplying a segment of the ileum was occluded for 2 hr in 51 anesthetized dogs, and plasma levels of H were determined radioenzymatically in the venous effluent. Catalase was applied to scavenge hydrogen peroxide; dimethylsulfoxide and mannitol were used as hydroxyl radical scavengers; the role of catalytically active iron was assessed by using desferrioxamine. Pretreatment with either catalase or desferrioxamine, but not with dimethyl sulfoxide or mannitol, was effective in reducing the postocclusive H release. The results provide further in vivo evidence that ROI are causative agents in H liberation during reperfusion of the ischemic gut. Hydrogen peroxide can interact with catalytically active iron and generate highly reactive oxidants, which in turn are responsible for H release. The exact nature of these oxidants is still uncertain.
Authors:
M Boros; J Kaszaki; S Nagy
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Circulatory shock     Volume:  35     ISSN:  0092-6213     ISO Abbreviation:  Circ. Shock     Publication Date:  1991 Nov 
Date Detail:
Created Date:  1992-03-10     Completed Date:  1992-03-10     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0414112     Medline TA:  Circ Shock     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  174-80     Citation Subset:  IM    
Affiliation:
Institute of Experimental Surgery, Szent-Györgyi Albert Medical University, Szeged, Hungary.
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MeSH Terms
Descriptor/Qualifier:
Animals
Deferoxamine / pharmacology
Dogs
Female
Histamine / pharmacology
Histamine Release*
Hydrogen Peroxide / metabolism
Intestines / metabolism*
Ions
Iron / metabolism*
Male
Reperfusion Injury / metabolism*
Vasodilation
Chemical
Reg. No./Substance:
0/Ions; 51-45-6/Histamine; 70-51-9/Deferoxamine; 7439-89-6/Iron; 7722-84-1/Hydrogen Peroxide

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


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