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CRIg, a Tissue-resident Macrophage Specific Immune Checkpoint Molecule, Promotes Immunological Tolerance in NOD Mice, Via a Dual Role in Effector and Regulatory T Cells

Overview
Journal Elife
Specialty Biology
Date 2017 Nov 25
PMID 29171836
Citations 31
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Abstract

How tissue-resident macrophages (TRM) impact adaptive immune responses remains poorly understood. We report novel mechanisms by which TRMs regulate T cell activities at tissue sites. These mechanisms are mediated by the complement receptor of immunoglobulin family (CRIg). Using animal models for autoimmune type 1 diabetes (T1D), we found that CRIg TRMs formed a protective barrier surrounding pancreatic islets. Genetic ablation of CRIg exacerbated islet inflammation and local T cell activation. CRIg exhibited a dual function of attenuating early T cell activation and promoting the differentiation of Foxp3 regulatory (Treg) cells. More importantly, CRIg stabilized the expression of Foxp3 in Treg cells, by enhancing their responsiveness to interleukin-2. The expression of CRIg in TRMs was postnatally regulated by gut microbial signals and metabolites. Thus, environmental cues instruct TRMs to express CRIg, which functions as an immune checkpoint molecule to regulate adaptive immunity and promote immune tolerance.

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References
1.
Emamaullee J, Davis J, Merani S, Toso C, Elliott J, Thiesen A . Inhibition of Th17 cells regulates autoimmune diabetes in NOD mice. Diabetes. 2009; 58(6):1302-11. PMC: 2682686. DOI: 10.2337/db08-1113. View

2.
Bailey-Bucktrout S, Bluestone J . Regulatory T cells: stability revisited. Trends Immunol. 2011; 32(7):301-6. PMC: 3129467. DOI: 10.1016/j.it.2011.04.002. View

3.
Yue X, Trifari S, Aijo T, Tsagaratou A, Pastor W, Zepeda-Martinez J . Control of Foxp3 stability through modulation of TET activity. J Exp Med. 2016; 213(3):377-97. PMC: 4813667. DOI: 10.1084/jem.20151438. View

4.
Depis F, Kwon H, Mathis D, Benoist C . Unstable FoxP3+ T regulatory cells in NZW mice. Proc Natl Acad Sci U S A. 2016; 113(5):1345-50. PMC: 4747713. DOI: 10.1073/pnas.1524660113. View

5.
Ohkura N, Hamaguchi M, Morikawa H, Sugimura K, Tanaka A, Ito Y . T cell receptor stimulation-induced epigenetic changes and Foxp3 expression are independent and complementary events required for Treg cell development. Immunity. 2012; 37(5):785-99. DOI: 10.1016/j.immuni.2012.09.010. View