Linked Life Data

2857189

Source:http://linkedlifedata.com/resource/pubmed/id/2857189

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1985-3-14
pubmed:abstractText
The expression of Ly-5 alloantigens is confined to hemopoietic cell types and is therefore considered a valuable indicator for the bone marrow derivation of a given cell. The further finding that different hemopoietic cell lineages express different molecular forms of the Ly-5 alloantigens prompted us to investigate (1) whether murine epidermal cells or subpopulations thereof express Ly-5 specificities and if so, (2) whether the expression of particular molecular configurations of Ly-5 antigens would allow us to gain a clue about the derivation of certain epidermal cell populations. When epidermal sheets from BALB/c, C57Bl/6, and C3H/He mice, were exposed to monoclonal anti Ly-5.1 antibody in an indirect immunofluorescence technique, a system of evenly distributed, dendritic cells was visualized. Allelic exclusion of the Ly-5 system was demonstrated by replacing anti-Ly-5.1 antibody by anti-Ly-5.2 reagent and by using epidermal sheets from SJL/J mice. Studies on epidermal cell (EC) suspensions revealed that about 1.6-5.2% of C3H/He EC were Ly-5-reactive and that approximately equal numbers of Ly-5-positive cells bore either Thy-1 or Ia antigens. Electron microscopic studies disclosed two morphologically different Ly-5-positive cell populations, i.e., cells of the Langerhans cell lineage and a recently defined cell system, whose most prominent feature is the expression of the Thy-1 antigen. We have termed these cells dendritic Thy-1+EC (dTHY-1+EC). In order to define the molecular configurations of the Ly-5 alloantigens, EC and spleen cells were internally labeled and--after immunoprecipitation of cell-membrane detergent extracts with anti-Ly-5.1--were analyzed on sodium dodecyl sulfate-polyacrylamide gels. Spleen cells yielded 3 bands with a molecular weight of 180,000, 195,000, and 215,000, respectively, as is characteristic for T lymphocytes, non-T/non-B cells, and B lymphocytes. In contrast, a single 195,000-200,000 dalton band was found in precipitates of both untreated and Langerhans cell-depleted (anti-Ia+C) EC. These data demonstrate the existence and active biosynthesis of the Ly-5 alloantigenic system on certain EC populations, i.e., Langerhans cells and dThy-1+EC, and therefore imply that both cell types originate from a bone marrow-derived precursor. The expression of the same molecular configuration of Ly-5 alloantigens on both LC and dThy-1+EC suggest that these two cell populations do not belong either to the T-cell or to the B-cell lineage and imply an ontogenetic relationship between dThy-1+EC and Ia-positive EC.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0022-202X
pubmed:author
pubmed:issnType
Print
pubmed:volume
84
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
91-5
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1985
pubmed:articleTitle
Expression of the Ly-5 alloantigenic system on epidermal cells.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't