Linked Life Data

9065743

Source:http://linkedlifedata.com/resource/pubmed/id/9065743

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1997-4-7
pubmed:abstractText
The therapeutic potential of alpha-lipoic acid (thioctic acid) was evaluated with respect to its influence on cellular reducing equivalent homeostasis. The requirement of NADH and NADPH as cofactors in the cellular reduction of alpha-lipoic acid to dihydrolipoate has been reported in various cells and tissues. However, there is no direct evidence describing the influence of such reduction of alpha-lipoate on the levels of cellular reducing equivalents and homeostasis of the NAD(P)H/NAD(P) ratio. Treatment of the human Wurzburg T-cell line with 0.5 mM alpha-lipoate for 24 hr resulted in a 30% decrease in cellular NADH levels. alpha-Lipoate treatment also decreased cellular NADPH, but this effect was relatively less and slower compared with that of NADH. A concentration-dependent increase in glucose uptake was observed in Wurzburg cells treated with alpha-lipoate. Parallel decreases (30%) in cellular NADH/NAD+ and in lactate/pyruvate ratios were observed in alpha-lipoate-treated cells. Such a decrease in the NADH/NAD+ ratio following treatment with alpha-lipoate may have direct implications in diabetes, ischemia-reperfusion injury, and other pathologies where reductive (high NADH/NAD+ ratio) and oxidant (excess reactive oxygen species) imbalances are considered as major factors contributing to metabolic disorders. Under conditions of reductive stress, alpha-lipoate decreases high NADH levels in the cell by utilizing it as a co-factor for its own reduction process, whereas in oxidative stress both alpha-lipoate and its reduced form, dihydrolipoate, may protect by direct scavenging of free radicals and recycling other antioxidants from their oxidized forms.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0006-2952
pubmed:author
pubmed:issnType
Print
pubmed:day
7
pubmed:volume
53
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
393-9
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
Modulation of cellular reducing equivalent homeostasis by alpha-lipoic acid. Mechanisms and implications for diabetes and ischemic injury.
pubmed:affiliation
Department of Molecular and Cell Biology, University of California, Berkeley 94720-3200, U.S.A. sashwati@violet.berkeley.edu
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.