1,25-dihydroxyvitamin D(3) Ameliorates Th17 Autoimmunity Via Transcriptional Modulation of Interleukin-17A
Overview
Authors
Affiliations
A new class of inflammatory CD4(+) T cells that produce interleukin-17 (IL-17) (termed Th17) has been identified, which plays a critical role in numerous inflammatory conditions and autoimmune diseases. The active form of vitamin D, 1,25-dihydroxyvitamin D(3) [1,25(OH)(2)D(3)], has a direct repressive effect on the expression of IL-17A in both human and mouse T cells. In vivo treatment of mice with ongoing experimental autoimmune encephalomyelitis (EAE; a mouse model of multiple sclerosis) diminishes paralysis and progression of the disease and reduces IL-17A-secreting CD4(+) T cells in the periphery and central nervous system (CNS). The mechanism of 1,25(OH)(2)D(3) repression of IL-17A expression was found to be transcriptional repression, mediated by the vitamin D receptor (VDR). Transcription assays, gel shifting, and chromatin immunoprecipitation (ChIP) assays indicate that the negative effect of 1,25(OH)(2)D(3) on IL-17A involves blocking of nuclear factor for activated T cells (NFAT), recruitment of histone deacetylase (HDAC), sequestration of Runt-related transcription factor 1 (Runx1) by 1,25(OH)(2)D(3)/VDR, and a direct effect of 1,25(OH)(2)D(3) on induction of Foxp3. Our results describe novel mechanisms and new concepts with regard to vitamin D and the immune system and suggest therapeutic targets for the control of autoimmune diseases.
Walawska-Hrycek A, Hrycek E, Galus W, Jedrzejowska-Szypulka H, Krzystanek E Nutrients. 2025; 17(2).
PMID: 39861482 PMC: 11769303. DOI: 10.3390/nu17020352.
Association between 25(OH) vitamin D and multiple sclerosis: cohort, shared genetics, and Causality.
Yu X, Lu H, Li J, Su M, Li X, Jin Y Nutr J. 2024; 23(1):151.
PMID: 39616386 PMC: 11608472. DOI: 10.1186/s12937-024-01059-4.
Enzel D, Kriventsov M, Sataieva T, Malygina V Int J Mol Sci. 2024; 25(16).
PMID: 39201632 PMC: 11355055. DOI: 10.3390/ijms25168946.
Fasihi M, Samimi-Badabi M, Robat-Jazi B, Bitarafan S, Naser Moghadasi A, Mansouri F Antiinflamm Antiallergy Agents Med Chem. 2024; 23(2):138-147.
PMID: 38566376 DOI: 10.2174/0118715230293847240314073359.
Vitamin D in Cutaneous T-Cell Lymphoma.
Odum A, Geisler C Cells. 2024; 13(6.
PMID: 38534347 PMC: 10969440. DOI: 10.3390/cells13060503.