NDLI: γδ T Cells in Immunity Induced by Mycobacterium bovis Bacillus Calmette-Guérin Vaccination

Content Provider	PubMed Central
Author	Lee, Jinhee Choi, Keumhwa Olin, Michael R. Cho, Sang-nae Molitor, Thomas W.
Copyright Year	2004
Abstract	Mycobacterium bovis bacillus Calmette-Guérin (BCG) vaccination is efficacious for newborns or adults with no previous exposure to environmental mycobacteria. To determine the relative contribution and the nature of γδ T-cell receptor-positive T cells in newborns, compared to CD4+ T cells, in immunity induced by M. bovis BCG vaccination, 4-week-old specific-pathogen-free pigs were vaccinated with M. bovis BCG and monitored by following the γδ T-cell immune responses. A flow cytometry-based proliferation assay and intracellular staining for gamma interferon (IFN-γ) were used to examine γδ T-cell responses. Pigs were found to mount Th1-like responses to M. bovis BCG vaccination as determined by immunoproliferation and IFN-γ production. The γδ T-cell lymphoproliferation and IFN-γ production to stimulation with mycobacterial antigens were significantly enhanced by M. bovis BCG vaccination. The relative number of proliferating γδ T cells after stimulating peripheral blood mononuclear cells with Mycobacterium tuberculosis H37Rv culture filtrate protein was higher than that of CD4+ T cells at an early time point after M. bovis BCG vaccination, but CD4+ T cells were found to be more abundant at a later time point. Although the γδ T-cell responses were dependent on the presence of CD4+ T cells for the cytokine interleukin-2, the enhanced γδ T cells were due to the intrinsic changes of γδ T cells caused by M. bovis BCG vaccination rather than being due solely to help from CD4+ T cells. Our study shows that γδ T cells from pigs at early ages are functionally enhanced by M. bovis BCG vaccination and suggests an important role for this T-cell subset in acquired immunity conferred by M. bovis BCG vaccination.
Related Links	http://dx.doi.org/10.1128/iai.72.3.1504-1511.2004
Ending Page	1511
Page Count	8
Starting Page	1504
File Format	PDF
ISSN	00199567
e-ISSN	10985522
Journal	Infection and Immunity
Issue Number	3
Volume Number	72
Language	English
Publisher	American Society for Microbiology
Publisher Date	2004-03-01
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Immunology Microbiology Parasitology Infectious Diseases Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Infectious Diseases Parasitology Immunology Microbiology

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