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© Research
Publication : Journal of immunology (Baltimore, Md. : 1950)

B and T lymphocyte attenuator is highly expressed on CMV-specific T cells during infection and regulates their function

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Journal of immunology (Baltimore, Md. : 1950) - 06 Aug 2010

Serriari NE, Gondois-Rey F, Guillaume Y, Remmerswaal EB, Pastor S, Messal N, Truneh A, Hirsch I, van Lier RA, Olive D

Link to Pubmed [PMID] – 20693422

J. Immunol. 2010 Sep;185(6):3140-8

B and T lymphocyte attenuator (BTLA), like its relative programmed cell death-1 (PD-1), is a receptor that negatively regulates murine T cell activation. However, its expression and function on human T cells is currently unknown. We report in this study on the expression of BTLA in human T cell subsets as well as its regulation on virus-specific T cells during primary human CMV infection. BTLA is expressed on human CD4(+) T cells during different stages of differentiation, whereas on CD8(+) T cells, it is found on naive T cells and is progressively downregulated in memory and differentiated effector-type cells. During primary CMV infection, BTLA was highly induced on CMV-specific CD8(+) T cells immediately following their differentiation from naive cells. After control of CMV infection, BTLA expression went down on memory CD8(+) cells. Engagement of BTLA by mAbs blocked CD3/CD28-mediated T cell proliferation and Th1 and Th2 cytokine secretion. Finally, in vitro blockade of the BTLA pathway augmented, as efficient as anti-PD-1 mAbs, allogeneic as well as CMV-specific CD8(+) T cell proliferation. Thus, our results suggest that, like PD-1, BTLA provides a potential target for enhancing the functional capacity of CTLs in viral infections.

http://www.ncbi.nlm.nih.gov/pubmed/20693422