NDLI: Suppressor T cells regulate the nonanergic cell population that remains after peripheral tolerance is induced to the Mls-1 antigen in T cell receptor Vβ8.1 transgenic mice

Content Provider	PubMed Central
Author	Maeda, Hironori Fujimoto, Shigeyoshi Greene, Mark I.
Copyright Year	2000
Abstract	We have found suppressor T cells that inhibit the proliferative response of naive CD4+ T cells in T cell receptor (TCR) Vβ8.1 transgenic mice rendered tolerant in vivo by inoculation of Mls-1a-positive cells. This suppression was mediated by CD4+ T cells but not by CD8+ T cells or double-negative (DN) cells, and splenic CD4+ T cells from tolerant mice displayed a greater suppression than lymph node CD4+ T cells. Cell contact was required for efficient suppression, and known inhibitory cytokines such as IL-4, IL-10, and transforming growth factor β were not involved. Suppressor T cells inhibited IL-2 production by naive CD4+ T cells, and the addition of exogenous IL-2 diminished the suppressed activity while having little activity on tolerant T cells. Suppression was abolished by the elimination of CD25+ T cells in the tolerant CD4+ T cell subset. CD25+CD4+ T cells suppressed the proliferative response of the residual fraction of the nonanergic population, namely, 6C10+CD4+ T cells still present in the tolerant mice. However, 6C10−CD4+ T cells still had reduced reactivity to Mls-1a even after CD25+CD4+ T cells were removed and exogenous IL-2 was added. Suppressor cells appear to affect only residual nonanergic cells in situ, thereby facilitating the maintenance of the unresponsive state in vivo. These data provide a framework for understanding suppressor T cells and explain the difficulties and variables in defining their activity in other systems, because suppressor T cells apparently control only a small population of nonanergic cells in the periphery and may be viewed as a homeostatic mechanism.
Related Links	http://dx.doi.org/10.1073/pnas.230449097
Ending Page	13262
Page Count	6
Starting Page	13257
File Format	PDF
ISSN	00278424
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	24
Volume Number	97
Language	English
Publisher	The National Academy of Sciences
Publisher Date	2000-11-21
Access Restriction	Open
Rights Holder	The National Academy of Sciences
Subject Keyword	General Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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Suppressor T cells regulate the nonanergic cell population that remains after peripheral tolerance is induced to the Mls-1 antigen in T cell receptor Vβ8.1 transgenic mice

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Suppressor T cells regulate the nonanergic cell population that remains after peripheral tolerance is induced to the Mls-1 antigen in T cell receptor Vβ8.1 transgenic mice