Linked Life Data

7557548

Source:http://linkedlifedata.com/resource/pubmed/id/7557548

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1995-11-9
pubmed:abstractText
Recent findings suggest that intracellular oxidants are involved in the induction of apoptosis, and that this type of cell death can be inhibited by various thiol-containing antioxidants such as N-acetyl cysteine. To study the effects of a physiologically important thiol reductant, rat thymocytes were preincubated with either lipoic acid, dihydrolipoic acid, or lipoamide and then exposed to methylprednisolone or etoposide, two stimuli known to induce apoptosis in these cells. Dihydrolipoic acid and lipoamide both exerted an inhibitory effect on apoptosis induced by the two stimuli, while lipoic acid was inactive. Inhibition of apoptosis was evident as (a) reduced formation of condensed, pyknotic nuclei; (b) a prevention of cell shrinkage; and (c) decreased chromatin degradation. Furthermore, the depletion of reduced glutathione that occurs as thymocytes undergo apoptosis was also prevented in the presence of DHLA. Investigation of the pattern of chromatin fragmentation revealed that DNA in the antioxidant-loaded thymocytes remained above 50 kb pairs in size, indicating that inhibition by DHLA was operative at an early step in the apoptotic pathway. These results suggest that intracellular oxidation is an obligate, early component of thymocyte apoptosis.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0891-5849
pubmed:author
pubmed:issnType
Print
pubmed:volume
19
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
339-47
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1995
pubmed:articleTitle
Antioxidant inhibition of thymocyte apoptosis by dihydrolipoic acid.
pubmed:affiliation
Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't