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© Research
Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Nature communications - 27 Jul 2022

Croft CA, Thaller A, Marie S, Doisne JM, Surace L, Yang R, Puel A, Bustamante J, Casanova JL, Di Santo JP,

Link to Pubmed [PMID] – 35896601

Link to DOI – 10.1038/s41467-022-32089-3

Nat Commun 2022 Jul; 13(1): 4344

Innate lymphoid cells (ILCs) include cytotoxic natural killer cells and distinct groups of cytokine-producing innate helper cells which participate in immune defense and promote tissue homeostasis. Circulating human ILC precursors (ILCP) able to generate all canonical ILC subsets via multi-potent or uni-potent intermediates according to our previous work. Here we show potential cooperative roles for the Notch and IL-23 signaling pathways for human ILC differentiation from blood ILCP using single cell cloning analyses and validate these findings in patient samples with rare genetic deficiencies in IL12RB1 and RORC. Mechanistically, Notch signaling promotes upregulation of the transcription factor RORC, enabling acquisition of Group 1 (IFN-γ) and Group 3 (IL-17A, IL-22) effector functions in multi-potent and uni-potent ILCP. Interfering with RORC or signaling through its target IL-23R compromises ILC3 effector functions but also generally suppresses ILC production from multi-potent ILCP. Our results identify a Notch->RORC- > IL-23R pathway which operates during human ILC differentiation. These observations may help guide protocols to expand functional ILC subsets in vitro with an aim towards novel ILC therapies for human disease.

https://pubmed.ncbi.nlm.nih.gov/35896601