Document Detail


Uric and 1-Methyluric Acids: Metabolic Wastes or Antiradical Protectors?
MedLine Citation:
PMID:  22097927     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The reactions of uric and 1-methyluric acids in non-polar environments, as well as those of the corresponding urate anions in aqueous solution, with •OH, •OCH3, •OOH, and •OOCH3 have been studied using the Density Functional Theory. Different mechanisms of reactions have been taken into account, and their relative importance on the antiradical activity of these compounds is analyzed. Both uric and methyluric acids are better scavengers in aqueous solution than in non-polar media, which indicates that the urate anions are the most active species. The free radical scavenging activity of the studied compounds was found to be excellent for •OH, and very good for •OCH3. In addition 1-methyluric acid is predicted to moderately protect against peroxyl oxidation, while the protective effects of uric acid against these particular species, are not expected to be significant. In addition, 1-methyluric acid was found to be a better radical scavenger than its precursor, caffeine, suggesting that the antiradical activity of the latter might be explained by the action of its metabolites, rather than by its direct activity.
Authors:
Jorge Rafael León-Carmona; Annia Galano
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-11-18
Journal Detail:
Title:  The journal of physical chemistry. B     Volume:  -     ISSN:  1520-5207     ISO Abbreviation:  -     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-11-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101157530     Medline TA:  J Phys Chem B     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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