Butyrophilin3A proteins and Vγ9Vδ2 T cell activation

Seminars in Cell & Developmental Biology
Siyi GuErin J Adams

Abstract

Despite playing critical roles in the immune response and having significant potential in immunotherapy, γδ T cells have garnered little of the limelight. One major reason for this paradox is that their antigen recognition mechanisms are largely unknown, limiting our understanding of their biology and our potential to modulate their activity. One of the best-studied γδ subsets is the human Vγ9Vδ2T cell population, which predominates in peripheral blood and can combat both microbial infections and cancers. Although it has been known for decades that Vγ9Vδ2T cells respond to the presence of small pyrophosphate-based metabolites, collectively named phosphoantigens (pAgs), derived from microbial sources or malignant cells, the molecular basis for this response has been unclear. A major breakthrough in this area came with the identification of the Butyrophilin 3A (BTN3A) proteins, members of the Butyrophilin/Butyrophilin-like protein family, as mediators between pAgs and Vγ9Vδ2T cells. In this article, we review the most recent studies regarding pAg activation of human Vγ9Vδ2T cells, mainly focusing on the role of BTN3A as the pAg sensing molecule, as well as its potential impact on downstream events of the activation process.

Citations

Jan 22, 2019·Nature Immunology·Benjamin E Willcox, Carrie R Willcox
Oct 14, 2019·Immunology·Loïc RaffrayMatthias Eberl
Sep 8, 2019·Nature Reviews. Drug Discovery·Zsolt SebestyenJurgen Kuball
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Jun 7, 2019·Cellular & Molecular Immunology·Léonce KouakanouDieter Kabelitz
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Jun 22, 2021·Frontiers in Immunology·Gitte Holmen OlofssonPer Thor Straten
Sep 11, 2018·Journal of Medicinal Chemistry·Nicholas A LentiniDavid F Wiemer

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