Linked Life Data

6602853

Source:http://linkedlifedata.com/resource/pubmed/id/6602853

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1 Suppl
pubmed:dateCreated
1983-8-17
pubmed:abstractText
In vitro aging models are based on the observation that normal cells in culture have a finite lifespan and eventually cease to proliferate under conditions that initially support excellent growth. Recent assessment of the aging process in keratinocytes, made possible by improved tissue-culture techniques, have confirmed prior findings with fetal and adult fibroblasts and have permitted investigation into the mechanism of in vitro senescence. Early-passage newborn human keratinocytes maintained in a serum-free system were found to proliferate more rapidly than early-passage adult keratinocytes maintained under identical conditions, and they were also found to have far steeper dose-response curves for a potent hypothalamus-derived mitogen keratinocyte growth factor (KGF), as well as for KGF/EGF in combination, with a more than 200-fold increase in cell number, total protein, and colony size over the tested range of concentrations, as opposed to a less than 75-fold increase for adult keratinocytes in these parameters. These results support the hypothesis that the age-associated decrease for keratinocyte proliferation in vitro may be due to progressive loss of mitogenic responsiveness. Unrecognized changes in proliferative rate and growth-factor requirements related to age of the tissue donor may complicate interpretation of studies addressing other aspects of keratinocyte biology.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0022-202X
pubmed:author
pubmed:issnType
Print
pubmed:volume
81
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
184s-9s
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1983
pubmed:articleTitle
In vitro assessment of keratinocyte aging.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.