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1996-02-26
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Document 0530
DOCN M9620530
TI Early IL-4 production by non-CD4+ cells at the site of antigen
deposition predicts the development of a T helper 2 cell response to
Schistosoma mansoni eggs.
DT 9602
AU Sabin EA; Pearce EJ; Department of Microbiology and Immunology, College
of Veterinary; Medicine, Cornell University, Ithaca, NY 14853, USA.
SO J Immunol. 1995 Nov 15;155(10):4844-53. Unique Identifier : AIDSLINE
MED/96062303
AB Cytokines play a major role in promoting naive Th cells to differentiate
into Th1 or Th2 cells. While IL-4 is recognized as the primary pro-Th2
inducing cytokine, the identity of its cellular sources during the
development of a Th2 response remains unclear. We have used Schistosoma
mansoni eggs, potent stimulators of Th2 responses both during the
natural progression of murine schistosomiasis and when experimentally
isolated and injected into normal mice, to examine IL-4 production early
in the evolution of an Ag-driven Th2 response. Analysis of peritoneal
exudate cells by IL-4 specific reverse transcriptase-PCR and ELISPOT, at
times following i.p. egg injection in naive C57BL/6 mice, revealed a
marked, transient elevation in IL-4 production at 2 to 12 h after Ag
exposure. This response was temporally accompanied by eosinophil and
neutrophil infiltration and mast cell disappearance. The pattern of
early IL-4 production and peritoneal cell infiltration was observed in
egg-injected CD4+ cell-depleted and nude C57BL/6 mice, strongly
suggesting that a non-T cell is the source of early IL-4 and that the
stimulus leading to the egg-induced changes in cellular composition are
T cell independent. In addition to IL-4 transcripts, peritoneal exudate
cells from egg-injected T cell replete or deficient mice contained
IFN-gamma and IL-12 transcripts. Control i.p. PBS injections led to no
or minimal cytokine gene transcription. Early IL-4 was predictive of
subsequent Th2 response development since, in contrast to C57BL/6 mice,
egg-injected BALB/c mice demonstrated no detectable IL-4 production at
12 h and mounted a comparatively weak egg Ag-specific Th2 response.
DE Animal Antigens, CD4/IMMUNOLOGY Base Sequence Cell
Differentiation/IMMUNOLOGY Female *Immunity, Cellular
Interleukin-4/*BIOSYNTHESIS Mice Mice, Inbred BALB C Mice, Inbred
C57BL Mice, Nude Molecular Sequence Data *Schistosoma mansoni
Schistosomiasis/*IMMUNOLOGY Support, Non-U.S. Gov't Support, U.S.
Gov't, P.H.S. Th2 Cells/*IMMUNOLOGY/PARASITOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).