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2014 ; 26
(5
): 638-52
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gab.com Text
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English Wikipedia
Dissecting the tumor myeloid compartment reveals rare activating
antigen-presenting cells critical for T cell immunity
#MMPMID25446897
Broz ML
; Binnewies M
; Boldajipour B
; Nelson AE
; Pollack JL
; Erle DJ
; Barczak A
; Rosenblum MD
; Daud A
; Barber DL
; Amigorena S
; Van't Veer LJ
; Sperling AI
; Wolf DM
; Krummel MF
Cancer Cell
2014[Nov]; 26
(5
): 638-52
PMID25446897
show ga
It is well understood that antigen-presenting cells (APCs) within tumors
typically do not maintain cytotoxic T cell (CTL) function, despite engaging them.
Across multiple mouse tumor models and human tumor biopsies, we have delineated
the intratumoral dendritic cell (DC) populations as distinct from macrophage
populations. Within these, CD103(+) DCs are extremely sparse and yet remarkably
capable CTL stimulators. These are uniquely dependent on IRF8, Zbtb46, and Batf3
transcription factors and are generated by GM-CSF and FLT3L cytokines. Regressing
tumors have higher proportions of these cells, T-cell-dependent immune clearance
relies on them, and abundance of their transcripts in human tumors correlates
with clinical outcome. This cell type presents opportunities for prognostic and
therapeutic approaches across multiple cancer types.