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M9610402.TXT
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1996-01-30
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Document 0402
DOCN M9610402
TI A nonlethal rat parvovirus infection suppresses rat T lymphocyte
effector functions.
DT 9601
AU McKisic MD; Paturzo FX; Gaertner DJ; Jacoby RO; Smith AL; Section of
Comparative Medicine, Yale School of Medicine, New; Haven, CT
06520-8016, USA.
SO J Immunol. 1995 Oct 15;155(8):3979-86. Unique Identifier : AIDSLINE
MED/96003439
AB Inoculation of the UMass strain of rat virus (RV-UMass) into adult
immunocompetent rats results in a prolonged subclinical infection that
is resolved in 4 to 8 wk. Co-labeling studies, using in situ
hybridization (ISH) and immunohistochemistry (IHC), confirmed that
RV-UMass was lymphocytotropic and capable of infecting CD4+ and CD8+ T
cells as well as B cells. ISH studies also revealed that virus
replication was restricted in unstimulated cells but was productive in
concanavalin A-stimulated lymphocytes. A corollary of productive
infection of lymphocytes was the suppression of lymphocyte functions.
Although RV-UMass did not appear to induce phenotypic changes during the
course of infection, cells from infected rats had diminished
proliferation and cytolytic responses. Both peripheral and mesenteric
lymph node cells exhibited only partial recovery of their proliferative
and cytolytic capacities one month after infection. Furthermore,
RV-UMass-infected tissue culture maintained alloreactive CD4+ T cells in
vitro, and a nonlethal infection of this T cell line inhibited Ag- and
IL-2-induced proliferation. Because parvoviruses are widespread among
laboratory rodents, these findings emphasize the importance of
identifying and excluding parvovirus infection in rodents and in
cultures of rat T lymphocytes.
DE Animal Cell Line Cytotoxicity, Immunologic CD4-Positive
T-Lymphocytes/IMMUNOLOGY CD8-Positive T-Lymphocytes/IMMUNOLOGY Disease
Susceptibility *Immune Tolerance Lymphocyte Transformation
Parvoviridae Infections/*IMMUNOLOGY Parvovirus/*IMMUNOLOGY Phenotype
Rats Rats, Inbred Lew Rats, Inbred WF Species Specificity Support,
Non-U.S. Gov't Support, U.S. Gov't, P.H.S. T-Lymphocyte
Subsets/*IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).