Linked Life Data

2145171

Source:http://linkedlifedata.com/resource/pubmed/id/2145171

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
1990-11-21
pubmed:abstractText
We have examined the role of isolated interleukin 2 receptor (IL2R) beta chains expressed by human resting T cells in the early period of primary T cell activation induced by soluble OKT3 monoclonal antibody (mAb) and exogenous IL2. In the initial 3-day-stimulation phase, high IL2 concentrations were required, in association with soluble OKT3 mAb, to induce the formation of IL2R alpha/beta heterodimers, while later, low IL2 concentrations were sufficient to promote cell growth. When added during the initial phase, TU27 mAb directed at the IL2 binding site of IL2R beta chain substantially inhibited the appearance of functional high-affinity IL2R. Lo-Tact-1 mAb directed at the IL2 binding site of the IL2R alpha chain had only a marginal effect. Strong induction of IL2R alpha mRNA occurred within 3 days upon OKT3 and IL2 stimulation even in the presence of Lo-Tact-1 mAb, but not in the presence of TU27 mAb. OKT3 alone failed to induce significant IL2R alpha gene transcription and that induced by IL2 alone was very weak. The constitutive expression of IL2R beta mRNA was visualized in resting T cells. It remained at a rather stable level, at least during the initial stimulation period which was examined herein. Given the fact that OKT3 alone was ineffective in up-regulating IL2R beta mRNA expression and that pre-incubation of the cells with OKT3 alone did not allow them to respond to high concentrations of IL2, it is highly probable that isolated IL2R beta chains constitutively expressed by CD8+ T cells (the main reactive cells in this system) are primarily responsible for the initial interaction of IL2 with these cells. Such an interaction will result in the formation of high-affinity IL2R and in the initiation of cell proliferation provided that a CD3-derived co-signal is simultaneously delivered to the cells.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0014-2980
pubmed:author
pubmed:issnType
Print
pubmed:volume
20
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1981-7
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
Role of interleukin 2 receptor beta chain in initiating anti-CD3 and interleukin 2-induced proliferation of human resting T cells.
pubmed:affiliation
Laboratoire d'Immunologie Cellulaire et de Transplantation, Villejuif, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't