|
||
J. Exp. Med.,
Volume 189, Number 8, April 19, 1999 1355-1360
Production
from CD4+ Versus CD8+ T Cells
By
From the Department of Pathology and Center for Immunology, Howard Hughes Medical
Institute, Washington University School of Medicine, St. Louis, Missouri 63110
CD4+ and CD8+ T cells exhibit important differences in their major effector functions. CD8+
T cells provide protection against pathogens through cytolytic activity, whereas CD4+ T cells
exert important regulatory activity through production of cytokines. However, both lineages
can produce interferon (IFN)-
, which can contribute to protective immunity. Here we show
that CD4+ and CD8+ T cells differ in their regulation of IFN-
production. Both lineages require signal transducer and activator of transcription (Stat)4 activation for IFN-
induced by
interleukin (IL)-12/IL-18 signaling, but only CD4+ T cells require Stat4 for IFN-
induction
via the TCR pathway. In response to antigen, CD8+ T cells can produce IFN-
independently of IL-12, whereas CD4+ T cells require IL-12 and Stat4 activation. Thus, there is a lineage-specific requirement for Stat4 activation in antigen-induced IFN-
production based on
differences in TCR signaling between CD4+ and CD8+ T cells.
;
T lymphocytes;
interleukin 12;
interleukin 18
This article has been cited by other articles:
| TABLE OF CONTENTS |
|