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Immunity. 2016 May 17;44(5):1127-39. doi: 10.1016/j.immuni.2016.03.007. Epub 2016 May 3.

Transforming Growth Factor-β Signaling Guides the Differentiation of Innate Lymphoid Cells in Salivary Glands.

Author information

1
Department of Pathology and Immunology, Washington University School of Medicine, St Louis, MO 63108, USA.
2
Immunology Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA.
3
Department of Surgery, Section of Acute and Critical Care Surgery, Washington University School of Medicine, St Louis, MO 63108, USA.
4
Centre d'Immunologie de Marseille-Luminy, UM2 Aix-Marseille Université, Marseille, France.
5
Department of Pathology and Immunology, Washington University School of Medicine, St Louis, MO 63108, USA. Electronic address: mcolonna@pathology.wustl.edu.

Abstract

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-β (TGF-β) 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-β-imprinting of SG ILCs. Thus, TGF-β induces SG ILC differentiation by suppressing Eomes. TGF-β acted through a JNK-dependent, Smad4-independent pathway. Transcriptome analysis demonstrated that SG ILCs had characteristic of both NK cells and ILC1. Finally, TGF-β imprinting of SG ILCs was synchronized with SG development, highlighting the impact of tissue microenvironment on ILC development.

KEYWORDS:

TGF-β; development; innate lymphoid cells; salivary gland; signaling; transcription factors

PMID:
27156386
PMCID:
PMC5114145
DOI:
10.1016/j.immuni.2016.03.007
[Indexed for MEDLINE]
Free PMC Article

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