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M9620521.TXT
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1996-02-26
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Document 0521
DOCN M9620521
TI Evidence for immunologic immaturity of cord blood T cells. Cord blood T
cells are susceptible to tolerance induction to in vitro stimulation
with a superantigen.
DT 9602
AU Takahashi N; Imanishi K; Nishida H; Uchiyama T; Department of
Microbiology and Immunology, Tokyo Women's Medical; College, Japan.
SO J Immunol. 1995 Dec 1;155(11):5213-9. Unique Identifier : AIDSLINE
MED/96072795
AB T cell blasts resulting from stimulating human cord blood (CB)
mononuclear cells (MC) and adult peripheral blood (APB) MC with a
bacterial superantigen, toxic shock syndrome toxin-1 (TSST-1), and then
with human rIL-2 were investigated for their reactions to restimulation
with TSST-1. Expression of TCR V beta 2, which determines the potential
reactivity to TSST-1 and of CD45RO, was increased in both TSST-1-induced
CB and APB T cell blasts. Most preparations of the TSST-1-induced CB T
cell blasts exhibited low or no production of IL-2 and IL-4 in response
to restimulation with TSST-1, while the APB T cell blasts showed high
responses. TSST-1-induced T cell blasts derived from APB T cells
depleted of both CD45RO+ T cells and HLA class II+ T cells showed high
IL-2 production in response to restimulation with TSST-1. TSST-1-induced
CB T cell blasts generated in the presence of DR+ L cells with high
accessory cell activity still showed a low response to restimulation
with TSST-1. These results indicate that CB T cells are inherently
highly susceptible to tolerance induction by bacterial superantigens,
suggesting the immunologic immaturity of CB T cells.
DE Adult Aging/IMMUNOLOGY Cell Differentiation Cells, Cultured
Cytokines/BIOSYNTHESIS CD4-Positive T-Lymphocytes/*IMMUNOLOGY
Enterotoxins/*IMMUNOLOGY Fetal Blood/*IMMUNOLOGY Human Immune
Tolerance/*IMMUNOLOGY Infant, Newborn Interleukin-2/BIOSYNTHESIS
Superantigens/IMMUNOLOGY Support, Non-U.S. Gov't Th2 Cells/IMMUNOLOGY
JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).