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Costimulatory molecule requirement for bovine WC1+ γδ T cells' proliferative response to bacterial superantigens
Fikri, Youssef; Pastoret, Paul-Pierre; Nyabenda, Jean
2002In Scandinavian Journal of Immunology, 55 (4), p. 373-381
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Keywords :
B7 antigen; CD86 antigen; Staphylococcus enterotoxin A; Staphylococcus enterotoxin B; T lymphocyte; Animals; Antigen Presentation; Antigens, CD; Antigens, CD80; Antigens, CD86; Bacterial Toxins; Cattle; Concanavalin A; Dendritic Cells; Enterotoxins; Interleukin-2; Lymphocyte Activation; Membrane Glycoproteins; Monocytes; Receptors, Antigen, T-Cell, gamma-delta; Staphylococcus aureus; Superantigens
Abstract :
[en] We have previously shown that the proliferation of freshly isolated bovine WC1+ γδ T cells to superantigens (SAgs) including staphylococcal enterotoxin A (SEA), and staphylococcal enterotoxin B (SEB) or toxic shock syndrome type-1 (TSST-1) required the presence of antigen-presenting cells (APC) and the addition of exogenous interleukin (IL)-2. The costimulatory activity provided by molecules expressed on professional APC for the proliferation of γδ T cells has not been addressed hitherto. In the present study, we investigated the ability of two selected APC populations, the dendritic cells (DCs) highly expressing CD80 and CD86 molecules (CD80highCD86high) and the monocytes expressing the same molecules at a rather low level (CD80lowCD86low), to stimulate the proliferation of purified bovine WC1+ γδ T cells to SAgs. DCs were more efficient than monocytes in inducing γδ T-cell proliferation, and this response was dependent on exogenous IL-2 in both presentation modes. Stimulating γδ T cells with gradual doses of SAgs or concanavalin A (ConA) resulted in similar dose-dependent reaction profiles suggesting a minimal role of the major histocompatibility complex (MHC). However, significant proliferation was already obtained with the starting doses in the presence of DC compared with monocytes, and higher proliferation was reached with DC at optimal doses. Finally, the addition of monoclonal antibody (MoAb) anti-CD86 markedly inhibited SAgs- and ConA-mediated proliferation, whereas MoAb anti-CD80 had no effect. The combination of both anti-CD80 and anti-CD86, however, suppressed this response. These results suggest that bovine γδ T-cell proliferation response requires indubitably CD86 costimulation. The role of CD80 molecule seems less clear.
Disciplines :
Veterinary medicine & animal health
Author, co-author :
Fikri, Youssef;  Institut Pasteur (Bruxelles) > Cellular Immunology
Pastoret, Paul-Pierre ;  Université de Liège - ULiège > Médecine vétérinaire > Immunology and vaccinology
Nyabenda, Jean;  Institut Pasteur (Bruxelles) > Cellular Immunology
Language :
English
Title :
Costimulatory molecule requirement for bovine WC1+ γδ T cells' proliferative response to bacterial superantigens
Publication date :
2002
Journal title :
Scandinavian Journal of Immunology
ISSN :
0300-9475
eISSN :
1365-3083
Publisher :
Blackwell Publishing, Oxford, United Kingdom
Volume :
55
Issue :
4
Pages :
373-381
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 08 April 2020

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