Abstract
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.
MeSH Terms
Animals
Antigen-Presenting Cells/immunology
Antigens, Bacterial/administration & dosage
Bacterial Proteins
CD8-Positive T-Lymphocytes/immunology
Chaperonin 60
Chaperonins/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
T-Lymphocytes/immunology
Tuberculosis/prevention & control
Chemicals
Antigens, Bacterial
Bacterial Proteins
Chaperonin 60
Heat-Shock Proteins
Receptors, Antigen, T-Cell, alpha-beta
Receptors, Antigen, T-Cell, gamma-delta
heat-shock protein 65, Mycobacterium
Chaperonins
Authors & Affiliations
4 authors, click to expand affiliations / ORCID
Silva C L
Department of Parasitology, Microbiology and Immunology, School of Medicine of Ribeirão Preto, University of São Paulo, Brazil.
Silva M F
Pietro R C
Lowrie D B
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