TLR2 is expressed on activated T cells as a costimulatory receptor

Komai-Koma, M., Jones, L., Ogg, G., Xu, D. and Liew, F. (2004) TLR2 is expressed on activated T cells as a costimulatory receptor. Proceedings of the National Academy of Sciences of the United States of America, 101, pp. 3029-3034. (doi: 10.1073/pnas.0400171101)

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Abstract

Toll is the founder of a group of pattern recognition receptors that play a critical role in the innate immunity in Drosophila. At least 10 distinct Toll-like receptors (TLRs), recognizing pathogen-associated molecular patterns, have now been identified in humans. Most investigations on TLRs have focused on cells of the innate system. We report here that naïve human T cells expressed high levels of cell-surface TLR2 after activation by anti-T cell receptor antibody and IFN-α. Activated cells produced elevated levels of cytokines in response to the TLR2 ligand, bacterial lipopeptide. Furthermore, CD4+CD45RO+ memory T cells from peripheral blood constitutively expressed TLR2 and produced IFN-γ in response to bacterial lipopeptide, which also markedly enhanced the proliferation and IFN-γ production by CD45RO+ T cells in the presence of IL-2 or IL-15. Thus, TLR2 serves as a costimulatory receptor for antigen-specific T cell development and participates in the maintenance of T cell memory. This suggests that pathogens, via their pathogen-associated molecular patterns, may contribute directly to the perpetuation and activation of long-term T cell memory in both antigen-dependent and independent manner.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Liew, Prof Foo and Xu, Dr Damo and Komai-Koma, Dr Mousa
Authors: Komai-Koma, M., Jones, L., Ogg, G., Xu, D., and Liew, F.
College/School:College of Medical Veterinary and Life Sciences
College of Medical Veterinary and Life Sciences > Institute of Infection Immunity and Inflammation
Journal Name:Proceedings of the National Academy of Sciences of the United States of America
Publisher:National Academy of Sciences
ISSN:0027-8424
ISSN (Online):1091-6490

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