Linked Life Data

9535781

Source:http://linkedlifedata.com/resource/pubmed/id/9535781

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1998-5-14
pubmed:abstractText
We demonstrate for the first time that cellular aging in vitro is accompanied by a dramatic elevation in the levels of ryanodine receptor-bearing Ca2+ channels. These channels normally reside within microsomal membranes and gate Ca2+ release from intracellular stores. We therefore measured cytosolic Ca2+ levels in 'young' (30 mean population doublings, MPDs) and 'senescent' (53 to 58 MPDs) human diploid fibroblasts (HDFs). Application of the known ryanodine receptor modulators, caffeine or cyclic adenosine diphosphate-ribose (cADPr), triggered cytosolic Ca2+ signals in both young and senescent cells. The signal magnitude however was significantly greater in senescent compared with young HDFs. In parallel, incubation with a highly specific anti-ryanodine receptor antiserum resulted in specific immunofluorescence only in senescent HDFs. We envisage that elevated levels of functional ryanodine receptors may underlie the defective Ca2+ handling and cellular degeneration that occurs with aging.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0006-291X
pubmed:author
pubmed:copyrightInfo
Copyright 1998 Academic Press.
pubmed:issnType
Print
pubmed:day
7
pubmed:volume
245
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
50-2
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
Upregulation of functional ryanodine receptors during in vitro aging of human diploid fibroblasts.
pubmed:affiliation
Department of Geriatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, 72205, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't