Linked Life Data

8625989

Source:http://linkedlifedata.com/resource/pubmed/id/8625989

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1996-6-24
pubmed:abstractText
Human intestinal T lymphocytes are constantly exposed to a large number of foreign antigens without developing a systemic immune response. One crucial mechanisms leading to this intestinal hyporesponsiveness is based on impaired signal transduction through the T cell receptor/CD3 complex in lamina propria T lymphocytes (LP-T). In this study, we addressed the question whether a lack of co-stimulatory/progression signals might also contribute to LP-T hyporesponsiveness. To this end, isolated human monocyte populations from the intestinal lamina propria were obtained and their phenotypes as well as their capacity to promote T cell activation studied. Here, we demonstrate that lamina propria macrophages (LP-MO), in contrast to peripheral blood monocytes (PB-MO), do not support proliferation of either LP-T or PB-T. This may be due to the low expression of ligands (CD54, CD58, CD80) for the T cell accessory receptors CD11/18, CD2 and CD28/CTLA-4 on mucosal macrophages. Thus, down-regulation of both recognition/competence and co-stimulatory/progression signals contribute to intestinal hypo- or unresponsiveness.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0014-2980
pubmed:author
pubmed:issnType
Print
pubmed:volume
26
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
922-7
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Differential regulation of human T cell responsiveness by mucosal versus blood monocytes.
pubmed:affiliation
Abteilung für Angewandte Immunologie, Deutsches Krebsforschungszentrum, Heidelberg, Germany.
pubmed:publicationType
Journal Article, Comparative Study