Linked Life Data

1830601

Source:http://linkedlifedata.com/resource/pubmed/id/1830601

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1991-8-30
pubmed:abstractText
Th cell development inside the thymus can be defined on the basis of qualitative and quantitative CD4 and CD8 marker expression and follows the pathway of CD4-8- cells----CD4+8+ cells----CD4+8low cells----CD4+8- cells, which presumably emigrate to seed the periphery and serve as functionally mature Th cells. The various cell subpopulations at defined developmental stages were isolated by electronic cell sorting and examined for mitogen induced IL-2 production and cell proliferation responses. For TCR-alpha beta-bearing CD4+8+ and CD4+8low thymocytes that are actively engaged in positive and negative selection processes, negligible to low levels of IL-2 production and cell proliferation were observed in response to TCR:CD3 triggering or to the combined activation of protein kinase C and calcium mobilization mediated by PMA and ionomycin, respectively. For CD4-8- TCR-alpha beta early thymocytes that have not yet entered the selection process, PMA + ionomycin induced significant cell proliferation but little IL-2 production, in the absence of added IL-1. However, addition of IL-1 caused a powerful induction of IL-2 production that was accompanied by increased cell proliferation. Triggering of the TCR:CD3 complex had no effect on CD4-8-TCR(-)-alpha beta thymocytes as they do not express detectable levels of TCR-alpha beta. For thymus CD4+8- Th cells, the first cells that have completed TCR repertoire selection, vigorous proliferation was observed in response to TCR:CD3 triggering in the presence of added IL-2. However, the development of IL-2 responsiveness was not accompanied by high level IL-2 inducibility as TCR:CD3 triggering caused only marginal IL-2 production. In contrast, spleen CD4+8- T cells, the most "mature" representatives of Th cells, expressed high levels of IL-2 production as well as IL-2 responsiveness in response to TCR:CD3-mediated stimulation. The lack of anti-TCR-induced IL-2 production by thymus CD4+8- T cells was not due to an intrinsic defect as high levels of IL-2 production was induced by PMA + ionomycin. Possible reasons for the temporal acquisition and differential control of IL-2 inducibility and IL-2 responsiveness are discussed in the context of established Th cell development pathway.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0022-1767
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
147
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
860-6
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed-meshheading:1830601-Animals, pubmed-meshheading:1830601-Antigens, CD3, pubmed-meshheading:1830601-Antigens, Differentiation, T-Lymphocyte, pubmed-meshheading:1830601-Calcium, pubmed-meshheading:1830601-Cell Differentiation, pubmed-meshheading:1830601-Cell Division, pubmed-meshheading:1830601-Cells, Cultured, pubmed-meshheading:1830601-Flow Cytometry, pubmed-meshheading:1830601-Interleukin-2, pubmed-meshheading:1830601-Ionomycin, pubmed-meshheading:1830601-Mice, pubmed-meshheading:1830601-Mice, Inbred C57BL, pubmed-meshheading:1830601-Mitogens, pubmed-meshheading:1830601-Protein Kinase C, pubmed-meshheading:1830601-Receptors, Antigen, T-Cell, pubmed-meshheading:1830601-Receptors, Antigen, T-Cell, alpha-beta, pubmed-meshheading:1830601-Spleen, pubmed-meshheading:1830601-T-Lymphocytes, Helper-Inducer, pubmed-meshheading:1830601-Tetradecanoylphorbol Acetate, pubmed-meshheading:1830601-Thymus Gland
pubmed:year
1991
pubmed:articleTitle
Mitogen-induced IL-2 production and proliferation at defined stages of T helper cell development.
pubmed:affiliation
Department of Microbiology, University of Texas Health Science Center, San Antonio 78284.
pubmed:publicationType
Journal Article, In Vitro, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't