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1996-02-26
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Document 0470
DOCN M9620470
TI The effect of antigen dose on CD4+ T helper cell phenotype development
in a T cell receptor-alpha beta-transgenic model.
DT 9602
AU Hosken NA; Shibuya K; Heath AW; Murphy KM; O'Garra A; Department of
Immunology, DNAX Research Institute, Palo Alto,; California 94304, USA.
SO J Exp Med. 1995 Nov 1;182(5):1579-84. Unique Identifier : AIDSLINE
MED/96042155
AB The dose of foreign antigen can influence whether a cell-mediated or
humoral class of immune response is elicited, and this may be largely
accounted for by the development of CD4+ T helper cells (Th) producing
distinct sets of cytokines. The ability of antigen dose to direct the
development of a Th1 or Th2 phenotype from naive CD4+ T cells, however,
has not been demonstrated. In this report, we show that the antigen dose
used in primary cultures could directly affect Th phenotype development
from naive DO11.10 TCR-alpha beta-transgenic CD4+ T cells when dendritic
cells or activated B cells were used as the antigen-presenting cells.
Consistent with our previous findings, midrange peptide doses (0.3-0.6
microM) directed the development of Th0/Th1-like cells, which produced
moderate amounts of interferon gamma (IFN-gamma). As the peptide dose
was increased, development of Th1-like cells producing increased amounts
of IFN-gamma was initially observed. At very high (> 10 microM) and very
low (< 0.05 microM) doses of antigenic peptide, however, a dramatic
switch to development of Th2-like cells that produced increasing amounts
of interleukin 4 (IL-4) and diminishing levels of IFN-gamma was
observed. This was true even when highly purified naive, high buoyant
density CD4+ LECAM-1hi T cells were used, ruling out a possible
contribution from contaminating memory phenotype CD4+ T cells.
Neutralizing anti-IL-4 antibodies completely inhibited the development
of this Th2-like phenotype at both high and low antigen doses,
demonstrating a requirement for endogenous IL-4. Our findings suggest
that the antigen dose may affect the levels of endogenous cytokines such
as IL-4 in primary cultures, resulting in the development of distinct Th
cell phenotypes.
DE Animal Antigen Presentation B-Lymphocytes/IMMUNOLOGY Dendritic
Cells/IMMUNOLOGY Dose-Response Relationship, Immunologic Female
Histocompatibility Antigens Class II/IMMUNOLOGY Immunologic Memory
Interferon Type II/*BIOSYNTHESIS Interleukin-4/*BIOSYNTHESIS
L-Selectin/IMMUNOLOGY Mice Mice, Inbred BALB C Mice, Transgenic
Phenotype Receptors, Antigen, T-Cell, alpha-beta/GENETICS/*IMMUNOLOGY
Support, Non-U.S. Gov't Th1 Cells/*IMMUNOLOGY Th2 Cells/*IMMUNOLOGY
JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).