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M9550129.TXT
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1995-03-04
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Document 0129
DOCN M9550129
TI Protection against tuberculosis by passive transfer with T-cell clones
recognizing mycobacterial heat-shock protein 65.
DT 9505
AU Silva CL; Silva MF; Pietro RC; Lowrie DB; Department of Parasitology,
Microbiology and Immunology, School; of Medicine of Ribeirao Preto,
University of Sao Paulo, Brazil.
SO Immunology. 1994 Nov;83(3):341-6. Unique Identifier : AIDSLINE
MED/95137660
AB We have previously shown that mice vaccinated by injection with J774
macrophage-like tumour cells that expressed Mycobacterium leprae
heat-shock protein (hsp) 65 as a transgene had acquired a remarkably
high degree of protection against subsequent challenge with virulent M.
tuberculosis. We show here that antigen-specific T cells cloned from
spleens of such vaccinated animals can transfer a high level of
protection to non-vaccinated recipients. The most efficient cells were
of T-cell receptor (TCR) alpha beta+ and CD4- CD8+ type and specifically
lysed mycobacteria-infected macrophages. These findings are consistent
with the importance for protective immunity of engaging the endogenous
antigen-presenting pathway to bias the immune response towards a
cytolytic action against a mycobacterial antigen that is expressed at
the surface of infected macrophages. TCR gamma delta+ and TCR alpha
beta+ cells interacted synergistically.
DE Animal Antigen-Presenting Cells/IMMUNOLOGY Antigens,
Bacterial/ADMINISTRATION & DOSAGE Chaperonins/*IMMUNOLOGY CD8-Positive
T-Lymphocytes/IMMUNOLOGY Heat-Shock Proteins/*IMMUNOLOGY
*Immunization, Passive Mice Mice, Inbred BALB C Mycobacterium
leprae/*IMMUNOLOGY Receptors, Antigen, T-Cell, alpha-beta/IMMUNOLOGY
Receptors, Antigen, T-Cell, gamma-delta/IMMUNOLOGY Support, Non-U.S.
Gov't T-Lymphocytes/*IMMUNOLOGY Tuberculosis/*PREVENTION & CONTROL
JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).