Linked Life Data

10335921

Source:http://linkedlifedata.com/resource/pubmed/id/10335921

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1999-6-23
pubmed:abstractText
We studied the possibility of supplementing human keratinocytes with exogenous lipids (phospholipids, sphingolipids and cholesterol) and evaluated their influence on cell proliferation, using cells cultured in vitro. Experiments carried out with liposomes composed of cholesterol/GM1 ganglioside and different phospholipids (5:1.5:10, M/M/M), showed that liposomes associated with cells more efficiently when they contained soya lecithin. The treatment with liposomes made of the ternary mixture did not modify the rate of cell proliferation, as assessed by the incorporation of [3H]-thymidine. In contrast, the proliferation rate strongly decreased (65% with respect to the control) using the same liposomes without GM1. Experiments carried out with GM1 alone showed a strong stimulation of the proliferation rate (144% with respect to the control). Fluorescence dequenching experiments, carried out with the probe octadecyl rhodamine B chloride, showed that fusion was the main mechanism of liposome-cell interaction. Metabolic studies established that exogenously administered GM1--either embedded in liposomes or as a pure glycolipid dispersion--led to the production of several products, including ceramide. Altogether, these results show that different, opposing effects can be exerted on cell proliferation by the administration of lipids, separately or in mixtures, to human keratinocytes, and indicate the importance of a correct formulation for supplementing human keratinocytes with exogenous lipids.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0340-3696
pubmed:author
pubmed:issnType
Print
pubmed:volume
291
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
232-7
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1999
pubmed:articleTitle
Interaction of liposomes composed of phospholipids, GM1 ganglioside and cholesterol with human keratinocytes in culture.
pubmed:affiliation
Department of Medical Chemistry and Biochemistry, Medical School, University of Milan, Milano, Italy. palpit@imiucca.csi.unim.it
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't