PMID- 37265392 OWN - NLM STAT- MEDLINE DCOM- 20230718 LR - 20231213 IS - 1550-6606 (Electronic) IS - 0022-1767 (Print) IS - 0022-1767 (Linking) VI - 211 IP - 2 DP - 2023 Jul 15 TI - Cutting Edge: Aire Is a Coactivator of the Vitamin D Receptor. PG - 175-179 LID - 10.4049/jimmunol.2300207 [doi] AB - Vitamin D deficiency is associated with the development of autoimmunity, which arises from defects in T cell tolerance to self-antigens. Interactions of developing T cells with medullary thymic epithelial cells, which express tissue-restricted Ags, are essential for the establishment of central tolerance. However, vitamin D signaling in the thymus is poorly characterized. We find that stromal and hematopoietic cells in the mouse thymus express the vitamin D receptor (Vdr) and Cyp27b1, the enzyme that produces hormonal 1,25-dihydroxyvitamin D (1,25D). Treatment of cultured thymic slices with 1,25D enhances expression of the critical medullary thymic epithelial cell transcription factor autoimmune regulator (Aire), its colocalization with the Vdr, and enhances tissue-restricted Ag gene expression. Moreover, the Vdr interacts with Aire in a 1,25D-dependent manner and recruits Aire to DNA at vitamin D response elements, where it acts as a Vdr coactivator. These data link vitamin D signaling directly to critical transcriptional events necessary for central tolerance. CI - Copyright (c) 2023 by The American Association of Immunologists, Inc. FAU - Artusa, Patricio AU - Artusa P AD - Department of Physiology, McGill University, Montreal, Quebec, Canada. FAU - Lebel, Marie-Eve AU - Lebel ME AD - Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec, Canada. FAU - Barbier, Camille AU - Barbier C AD - Department of Physiology, McGill University, Montreal, Quebec, Canada. FAU - Memari, Babak AU - Memari B AUID- ORCID: 0000-0002-4754-6217 AD - Department of Physiology, McGill University, Montreal, Quebec, Canada. FAU - Salehi-Tabar, Reyhaneh AU - Salehi-Tabar R AUID- ORCID: 0000-0002-9111-6513 AD - Department of Physiology, McGill University, Montreal, Quebec, Canada. FAU - Karabatsos, Sophia AU - Karabatsos S AUID- ORCID: 0009-0004-5695-9728 AD - Department of Physiology, McGill University, Montreal, Quebec, Canada. FAU - Ismailova, Aiten AU - Ismailova A AUID- ORCID: 0000-0001-5530-5336 AD - Department of Physiology, McGill University, Montreal, Quebec, Canada. FAU - Melichar, Heather J AU - Melichar HJ AUID- ORCID: 0000-0003-0951-334X AD - Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec, Canada. AD - Departement de Medecine, Universite de Montreal, Montreal, Quebec, Canada. FAU - White, John H AU - White JH AUID- ORCID: 0000-0002-4785-2687 AD - Department of Physiology, McGill University, Montreal, Quebec, Canada. LA - eng GR - PJT-180271/CIHR/Canada PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Immunol JT - Journal of immunology (Baltimore, Md. : 1950) JID - 2985117R RN - 0 (Receptors, Calcitriol) RN - 0 (Transcription Factors) RN - 1406-16-2 (Vitamin D) RN - 0 (Vdr protein, mouse) SB - IM MH - Animals MH - Mice MH - Epithelial Cells MH - Gene Expression Regulation MH - *Receptors, Calcitriol/metabolism MH - Thymus Gland MH - *Transcription Factors/genetics/metabolism MH - Vitamin D/metabolism MH - AIRE Protein PMC - PMC10315440 COIS- The authors have no financial conflicts of interest. EDAT- 2023/06/02 13:15 MHDA- 2023/07/05 06:42 PMCR- 2023/06/02 CRDT- 2023/06/02 09:53 PHST- 2023/03/29 00:00 [received] PHST- 2023/05/08 00:00 [accepted] PHST- 2023/07/05 06:42 [medline] PHST- 2023/06/02 13:15 [pubmed] PHST- 2023/06/02 09:53 [entrez] PHST- 2023/06/02 00:00 [pmc-release] AID - 263850 [pii] AID - jimmunol_2300207 [pii] AID - 10.4049/jimmunol.2300207 [doi] PST - ppublish SO - J Immunol. 2023 Jul 15;211(2):175-179. doi: 10.4049/jimmunol.2300207.