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M9630120.TXT
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1996-02-27
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Document 0120
DOCN M9630120
TI Evidence that the murine AIDS defective virus does not encode a
superantigen.
DT 9603
AU Doyon L; Simard C; Sekaly RP; Jolicoeur P; Laboratoire d'Immunologie,
Institut de Recherches Cliniques de; Montreal, Canada.
SO J Virol. 1996 Jan;70(1):1-9. Unique Identifier : AIDSLINE MED/96099406
AB The T-cell receptor repertoire was analyzed in C57BL/6 mice upon
infection with helper-free stocks of the pathogenic murine AIDS (MAIDS)
defective virus in order to demonstrate if, as previously reported, this
virus encodes a superantigen. A polyclonal T-cell stimulation involving
T cells expressing multiple V beta subsets occurred within the first
week of infection, while late in the disease we could note only a 50%
deletion of V beta 5 CD8+ cells. Transfection of the MAIDS virus genomic
DNA into fibroblasts and B cells expressing major histocompatibility
complex class II molecules failed to show any stimulation of cells
expressing the specific V beta (V beta 5) previously reported to respond
to MAIDS virus-infected cells. In addition, mice lacking V beta 5 cells
did not show any significant decrease in susceptibility to the disease
compared with mice expressing V beta 5 and bred on the same genetic
background. Our in vivo and in vitro results fail to demonstrate a role
for a superantigen encoded by the MAIDS defective viral genome in the
pathogenesis of MAIDS.
DE Animal B-Lymphocytes/IMMUNOLOGY/VIROLOGY Cell Line CD8-Positive
T-Lymphocytes/METABOLISM Defective Viruses/*IMMUNOLOGY/ISOLATION &
PURIF Disease Susceptibility/IMMUNOLOGY Fibroblasts/CYTOLOGY Helper
Viruses Histocompatibility Antigens Class II Human Leukemia Viruses,
Murine/*IMMUNOLOGY/ISOLATION & PURIF Mice Mice, Inbred C57BL Mice,
Transgenic Murine Acquired Immunodeficiency
Syndrome/*IMMUNOLOGY/VIROLOGY Receptors, Antigen, T-Cell/IMMUNOLOGY
Receptors, Antigen, T-Cell, alpha-beta/IMMUNOLOGY
Superantigens/BIOSYNTHESIS/*IMMUNOLOGY Support, Non-U.S. Gov't
T-Lymphocytes/IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).