Linked Life Data

7995934

Source:http://linkedlifedata.com/resource/pubmed/id/7995934

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1995-1-19
pubmed:abstractText
We compared immunologic functions of human vascular smooth muscle cells (VSMC) with those of endothelial cells (EC) cultured from saphenous vein. Both cell types can express comparable levels of MHC class II molecules. However, class II-positive VSMCs, unlike ECs, do not stimulate resting CD4+ T cell proliferation. Limiting dilution analyses revealed IL-2-producing cells alloreactive to class II-positive ECs but not VSMCs. Class II molecules on VSMCs are functional, inducing CD25 expression on resting CD4+ T cells and stimulating proliferation of CD4+ T cells that have been pre-activated by ECs. VSMC expression of the co-stimulator molecules CD44, CD54, CD58, and CD59 is comparable to EC expression, and neither VCAM-1 nor B7 are expressed on either cell. However, VSMCs are less efficient than ECs at co-stimulating IL-2 production by PHA-stimulated PBL. VSMCs but not ECs cultured across a Transwell inhibit CD4+ T cell proliferation to allogeneic ECs and, to a lesser extent, IL-2 production in the same assay. Inhibition of proliferation cannot be transferred by VSMC-conditioned media, nor reversed by inhibitors of prostaglandin synthesis, TGF-beta 1, or nitric oxide synthesis. CD4+ T cells cocultured with class II-positive VSMCs proliferate to a subsequent challenge with ECs from the same donor as well as freshly isolated T cells. We conclude that VSMCs express functional MHC class II molecules and stimulate pre-activated T cells. However, VSMCs lack adequate costimulators to fully stimulate resting T cells, and VSMCs inhibit T cell proliferation.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0022-1767
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
154
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
151-61
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1995
pubmed:articleTitle
Human vascular smooth muscle cells poorly co-stimulate and actively inhibit allogeneic CD4+ T cell proliferation in vitro.
pubmed:affiliation
Boyer Center for Molecular Medicine, Yale University School of Medicine, New Haven, CT 06510.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't