Linked Life Data

1708801

Source:http://linkedlifedata.com/resource/pubmed/id/1708801

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1991-5-31
pubmed:abstractText
The aim of this study was to determine the effects of 13-cis-RA, all-trans-RA, and acitretin on the proliferation, lipid synthesis, and keratin expression of human sebocytes in vitro and to elucidate possible mechanisms of retinoid action on sebaceous glands at the cellular level. It was found that 13-cis-RA and all-trans-RA decreased sebocyte proliferation in a dose- and time-dependent manner, with a 13-cis-RA-IC50 of 10(-5) M (after 7 d) and 10(-6) M (after 14 d) and an all-trans-RA-IC50 of 10(-7) M (after 14 d; no IC50 after 7 d). Acitretin inhibited sebocyte proliferation only at 10(-5) M. Furthermore, 13-cis-RA was the most potent inhibitor of acetate incorporation into lipids, which indicated lipid synthesis (48.2% reduction), followed by all-trans-RA (-38.6%), and by acitretin (-27.5%). All retinoids tested markedly decreased the synthesis of triglycerides, wax/stearyl esters, and free fatty acids in cultured sebocytes, whereas squalene synthesis remained uninfluenced and cholesterol synthesis slightly increased. On the other hand, keratin 5 was down-regulated, keratin 17 was up-regulated, and the expression of keratin 13 was virtually unaffected by all retinoids tested. Keratins 6 and 16 were down-regulated by 13-cis-RA and by all-trans-RA, keratin 14 was down-regulated by 13-cis-RA only, and keratin 19 was up-regulated by all-trans-RA. These investigations indicate that 13-cis-RA and, to a lesser extent, all-trans-RA are potent inhibitors of both cell proliferation and lipid synthesis in human sebocytes in vitro, whereas acitretin only decreases lipogenesis in this model. In addition, retinoids may modify the differentiation of sebocytes in vitro by modulating keratin expression. Models of cultured human sebocytes are useful tools for further investigations on the sebaceous gland and its activity at the cellular level.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0022-202X
pubmed:author
pubmed:issnType
Print
pubmed:volume
96
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
792-7
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
Effects of 13-cis-retinoic acid, all-trans-retinoic acid, and acitretin on the proliferation, lipid synthesis and keratin expression of cultured human sebocytes in vitro.
pubmed:affiliation
Department of Dermatology, University Medical Center, Steglitz, Berlin, Federal Republic of Germany.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't