Linked Life Data

8625533

Source:http://linkedlifedata.com/resource/pubmed/id/8625533

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1996-6-24
pubmed:abstractText
An important and yet unresolved question concerns the mode of T cell recognition of idiotypic epitopes on immunoglobulin molecules in humans. Results from murine and human studies show that some idiotype-specific T cells recognize conformational epitopes on immunoglobulin, and such T cells are not MHC-restricted. In the present study T cell stimulation induced by idiotypic determinants on the autologous monoclonal IgG (M-components) from patients with monoclonal gammopathies was studied. In parallel, T cell stimulation in response to a conventional antigen, purified protein derivative, was also examined. It is shown that, as with conventional antigen, idiotype-induced T cell stimulation requires the presence of antigen-presenting cells (APC; monocytes and/or B cells), and is MHC class II (DR)-restricted. B cells, but not monocytes, can present idiotypic determinants to T cells at very low antigen concentrations, while monocytes do so only when antigen is present at high concentrations. Antigen processing and presentation is abrogated by treatment of APC with chloroquine. In conclusion, our study demonstrates that human idiotype-specific T cells recognize processed idiotypic determinants presented by MHC class II (HLA-DR) molecules on APC, and that B cells require about 1000-fold less antigen that monocytes.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0009-9104
pubmed:author
pubmed:issnType
Print
pubmed:volume
104
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
359-65
pubmed:dateRevised
2008-11-20
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Idiotype-induced T cell stimulation requires antigen presentation in association with HLA-DR molecules.
pubmed:affiliation
Immunological Research Laboratory, Karolinska Hospital, Stockholm, Sweden.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't