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2018 ; 9
(ä): 1601
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New Insights Into the Regulation of ?? T Cells by BTN3A and Other BTN/BTNL in
Tumor Immunity
#MMPMID30050536
Blazquez JL
; Benyamine A
; Pasero C
; Olive D
Front Immunol
2018[]; 9
(ä): 1601
PMID30050536
show ga
Recent findings in the immunology field have pointed out the emergent role of
butyrophilins/butyrophilin-like molecules (BTN/BTNL in human, Btn/Btnl in mouse)
in the modulation of ?? T cells. As long as the field develops exponentially, new
relationships between certain ?? T cell subsets, on one hand, and their BTN/BTNL
counterparts mainly present on epithelial and tumor cells, on the other, are
described in the scientific literature. Btnl1/Btnl6 in mice and BTNL3/BTNL8 in
humans regulate the homing and maturation of V?7+ and V?4+ T cells to the gut
epithelium. Similarly, Skint-1 has shown to shape the dendritic epidermal T cells
repertoire and their activation levels in mice. We and others have identified
BTN3A proteins are the key mediators of phosphoantigen sensing by human V?9V?2 T
cells. Here, we first synthesize the modulation of specific ?? T cell subsets by
related BTN/BTNL molecules, in human and mice. Then, we focus on the role of
BTN3A in the activation of V?9V?2 T cells, and we highlight the recent advances
in the understanding of the expression, regulation, and function of BTN3A in
tumor immunity. Hence, recent studies demonstrated that several signals induced
by cancer cells or their microenvironment can regulate the expression of BTN3A.
Moreover, antibodies targeting BTN3A have shown in vitro and in vivo efficacy in
human tumors such as acute myeloid leukemia or pancreatic cancer. We thus finally
discuss how these findings could help develop novel ?? T cell-based
immunotherapeutical approaches.