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2016 ; 44
(5
): 1127-39
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Transforming Growth Factor-? Signaling Guides the Differentiation of Innate
Lymphoid Cells in Salivary Glands
#MMPMID27156386
Cortez VS
; Cervantes-Barragan L
; Robinette ML
; Bando JK
; Wang Y
; Geiger TL
; Gilfillan S
; Fuchs A
; Vivier E
; Sun JC
; Cella M
; Colonna M
Immunity
2016[May]; 44
(5
): 1127-39
PMID27156386
show ga
The signals guiding differentiation of innate lymphoid cells (ILCs) within
tissues are not well understood. Salivary gland (SG) ILCs as well as liver and
intestinal intraepithelial ILC1 have markers that denote tissue residency and
transforming growth factor-? (TGF-?) imprinting. We deleted Tgfbr2 in cells
expressing the ILC and NK marker NKp46 and found that SG ILCs were reduced in
number. They lost distinct tissue markers, such as CD49a, and the effector
molecules TRAIL and CD73. Expression of the transcription factor Eomes, which
promotes NK cell differentiation, was elevated. Conversely, Eomes deletion in
NKp46(+) cells enhanced TGF-?-imprinting of SG ILCs. Thus, TGF-? induces SG ILC
differentiation by suppressing Eomes. TGF-? acted through a JNK-dependent,
Smad4-independent pathway. Transcriptome analysis demonstrated that SG ILCs had
characteristic of both NK cells and ILC1. Finally, TGF-? imprinting of SG ILCs
was synchronized with SG development, highlighting the impact of tissue
microenvironment on ILC development.