Linked Life Data

15686113

Source:http://linkedlifedata.com/resource/pubmed/id/15686113

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
2005-2-2
pubmed:abstractText
Two new compounds, sodium N-(6, '8-dimercaptooctanoyl)-2-amino ethanesulfonate- and sodium N-(6, 8-dimercaptooctanoyl)-L-aspartate - zinc complex were synthesized from alpha-lipoyl-2-aminoethanesulfonate and alpha-lipoyl-L- aspartate by reduction of zinc/acetic acid respectively. These alpha-lipoyl-amino acids were obtained by a coupling of alpha-lipoic acid and 2-aminoethanesulfonate or L-aspartate, using a mixed anhydride method. Scavenging activities of these derivatives against hydroxyl radicals (*OH) was demonstrated directly using electron spin resonance (ESR) spectrometry with spin trapping. Otherwise an apparent superoxide anion radical (O2*-) scavenging effect of these derivatives may be due to the inhibition of 02*- generation system, i.e., xanthine oxidase. Scavenging activities of these compounds against nitric oxide radicals (NO*), and peroxynitrite (ONOO-) were estimated by the flow injection analysis using the Griess reagent and by a fluorescence spectrometry using dihydrorhodamine 123 respectively. Meanwhile, these derivatives showed protective effects against lipid peroxidation and protein carbonyl formation. Scavenging activities against NO* and ONOO-, and inhibitory effects on protein carbonyl formation of these derivatives were much stronger than these of alpha-lipoic acid itself.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1078-0297
pubmed:author
pubmed:issnType
Print
pubmed:volume
113-114
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
133-47
pubmed:meshHeading
pubmed:year
2003
pubmed:articleTitle
Antioxidant activities of novel alpha-lipoic acid derivatives: N-(6, 8-dimercaptooctanoyl)-2-aminoethanesulfonate- and N-(6, 8-dimercaptooctanoyl)-L-aspartate-zinc complex.
pubmed:affiliation
Kochi University of Technology, Kochi, Japan.
pubmed:publicationType
Journal Article