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M9550128.TXT
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1995-03-04
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Document 0128
DOCN M9550128
TI A Th1 cell line (3E9.1) from resistant A/J mice inhibits induction of
macrophage procoagulant activity in vitro and protects against MHV-3
mortality in vivo.
DT 9505
AU Chung S; Gorczynski R; Cruz B; Fingerote R; Skamene E; Perlman S;
Leibowitz J; Fung L; Flowers M; Levy G; University of Toronto, Canada.
SO Immunology. 1994 Nov;83(3):353-61. Unique Identifier : AIDSLINE
MED/95137662
AB Induction of immune coagulants has been implicated in the pathogenesis
of murine hepatitis virus strain 3 (MHV-3)-induced fulminant hepatic
necrosis. Previous work from our laboratory has shown that the induction
of procoagulant activity (PCA) correlates with the
resistance/susceptibility to disease in inbred and recombinant inbred
(RI) strains of mice. Macrophages from susceptible, but not resistant,
strains of mice expressed increased levels of PCA in response to MHV-3
stimulation. T lymphocytes, however, had a marked regulatory role in the
final expression of macrophage PCA. CD3+ CD4+ CD8- lymphocytes from RI
H-2 compatible susceptible mice were able to instruct macrophages from
susceptible mice to express significantly augmented levels of PCA,
whereas CD3+ lymphocytes from RI H-2 compatible MHV-3-immunized
resistant mice were able to suppress induction of PCA. In this present
study, T-cell lines were derived from draining popliteal lymph nodes
from resistant A/J mice, which had been immunized with MHV-3. All T-cell
lines showed marked proliferation to MHV-3 and MHV-JHM which was major
histocompatibility complex (MHC) restricted. All cell lines were CD3+,
four of these were CD4+ and one was CD8+. All of the CD4+ cell lines
produced IL-2 and two produced interferon-gamma (IFN-gamma), consistent
with the Th1 cytokine profile. One cell line (3E9.1) was able to inhibit
the induction of macrophage PCA through production of a soluble factor
although cell-to-cell contact could not be excluded. This CD4+ T-cell
line conferred protection to infected and susceptible AXB8 mice. These
results demonstrate that the existence of a Th1 subpopulation of cells
with a regulatory effect on macrophage PCA induction in MHV-3-infected
mice contributes to the resistance of the A/J strain of mice to MHV-3
infection.
DE Animal Base Sequence Blood Coagulation Cell Line Coronavirus
Infections/*IMMUNOLOGY Disease Susceptibility DNA Primers
Gastroenteritis Virus, Murine/*IMMUNOLOGY Hepatitis, Viral,
Animal/*IMMUNOLOGY Immunity, Natural Macrophage Activation/*IMMUNOLOGY
Macrophages/PHYSIOLOGY Mice Mice, Inbred C57BL Mice, Inbred Strains
Molecular Sequence Data Support, Non-U.S. Gov't Support, U.S. Gov't,
P.H.S. Th1 Cells/*IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).