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A Pan-family Screen of Nuclear Receptors in Immunocytes Reveals Ligand-dependent Inflammasome Control

Abstract

Ligand-dependent transcription factors of the nuclear receptor (NR) family regulate diverse aspects of metazoan biology, enabling communications between distant organs via small lipophilic molecules. Here, we examined the impact of each of 35 NRs on differentiation and homeostatic maintenance of all major immunological cell types in vivo through a "Rainbow-CRISPR" screen. Receptors for retinoic acid exerted the most frequent cell-specific roles. NR requirements varied for resident macrophages of different tissues. Deletion of either Rxra or Rarg reduced frequencies of GATA6 large peritoneal macrophages (LPMs). Retinoid X receptor alpha (RXRα) functioned conventionally by orchestrating LPM differentiation through chromatin and transcriptional regulation, whereas retinoic acid receptor gamma (RARγ) controlled LPM survival by regulating pyroptosis via association with the inflammasome adaptor ASC. RARγ antagonists activated caspases, and RARγ agonists inhibited cell death induced by several inflammasome activators. Our findings provide a broad view of NR function in the immune system and reveal a noncanonical role for a retinoid receptor in modulating inflammasome pathways.

References
1.
Morton A, Sefik E, Upadhyay R, Weissleder R, Benoist C, Mathis D . Endoscopic photoconversion reveals unexpectedly broad leukocyte trafficking to and from the gut. Proc Natl Acad Sci U S A. 2014; 111(18):6696-701. PMC: 4020091. DOI: 10.1073/pnas.1405634111. View

2.
Gundra U, Girgis N, Gonzalez M, Tang M, van der Zande H, Lin J . Vitamin A mediates conversion of monocyte-derived macrophages into tissue-resident macrophages during alternative activation. Nat Immunol. 2017; 18(6):642-653. PMC: 5475284. DOI: 10.1038/ni.3734. View

3.
Mimitou E, Lareau C, Chen K, Zorzetto-Fernandes A, Hao Y, Takeshima Y . Scalable, multimodal profiling of chromatin accessibility, gene expression and protein levels in single cells. Nat Biotechnol. 2021; 39(10):1246-1258. PMC: 8763625. DOI: 10.1038/s41587-021-00927-2. View

4.
Finlay C, Parkinson J, Zhang L, Chan B, Ajendra J, Chenery A . T helper 2 cells control monocyte to tissue-resident macrophage differentiation during nematode infection of the pleural cavity. Immunity. 2023; 56(5):1064-1081.e10. PMC: 7616141. DOI: 10.1016/j.immuni.2023.02.016. View

5.
Zhang P, Liu Y, Hu L, Huang K, Hong M, Wang Y . NLRC4 inflammasome-dependent cell death occurs by a complementary series of three death pathways and determines lethality in mice. Sci Adv. 2021; 7(43):eabi9471. PMC: 8535822. DOI: 10.1126/sciadv.abi9471. View