Vitamin D-3 Induces IDO+ Tolerogenic DCs and Enhances Treg, Reducing the Severity of EAE

Author(s):Show less -

Farias, Alessandro S. ^{[1, 2]} ; Spagnol, Gabriela S. ^{[1, 2]} ; Bordeaux-Rego, Pedro ^{[1, 2]} ; Oliveira, Camila O. F. ^{[1, 2]} ; Fontana, Ana Gabriela M. ^{[1, 2]} ; de Paula, Rosemeire F. O. ^[1] ; Santos, Mariana P. A. ^{[1, 2]} ; Pradella, Fernando ^{[1, 2]} ; Moraes, Adriel S. ^{[1, 2]} ; Oliveira, Elaine C. ^[1] ; Longhini, Ana Leda F. ^[1] ; Rezende, Alexandre C. S. ^[1] ; Vaisberg, Mauro W. ^[3] ; Santos, Leonilda M. B. ^[1]

Affiliation

^[1] Univ Campinas UNICAMP, Dept Genet Evolut & Bioagents, Neuroimmunol Unit, Campinas, SP - Brazil

^[2] Univ Campinas UNICAMP, Dept Genet Evolut & Bioagents, Neuroimmunomodulat Grp, Campinas, SP - Brazil

^[3] Fed Univ Sao Paulo UNIFESP, Sao Paulo - Brazil

• Document type: Journal article
• Source: CNS Neuroscience & Therapeutics; v. 19, n. 4, p. 269-277, APR 2013.
• Web of Science Citations: 72

Abstract

Background A growing body of evidence supports the hypothesis that vitamin D is an important environmental factor in the etiology of T-cell-mediated autoimmune diseases such as multiple sclerosis (MS). Aim The purpose of this study was exploring the mechanisms underlying the beneficial effect of vitamin D3 in encephalomyelitis (EAE). Methods We treated monophasic experimental autoimmune EAE, induced in Lewis rat, with vitamin D3 and adoptively transfer tolerogenic bone marrow-derived DCs generated in the presence of vitamin D3. Results This study provides evidence that the in vivo administration of vitamin D3, as well as the adoptive transfer of vitamin D3-induced IDO+ immature/tolerogenic dendritic cells, leads to a significant increase in the percentage of CD4+CD25+Foxp3+ regulatory T cells in the lymph nodes in a rat model of MS, experimental autoimmune EAE. Concomitant with the increase in this cell population, there is a significant decrease in the number of autoreactive T cells in the central nervous system. Bone marrow-derived DCs cultivated in the presence of vitamin D3 present a tolerogenic profile with high IL-10, TNF, and IDO expression and decreased MHC-II and CD80 expression. The adoptive transfer of IDO + DCs induces a significant increase in the percentage of CD4+CD25+Foxp3+ T cells in the lymph nodes, comparable with vitamin D3 treatment. Conclusion These mechanisms contribute actively to the generation of a microenvironment in the lymph nodes that suppresses the activation of encephalitogenic T cells, resulting in the downregulation of the inflammatory response in the central nervous system. (AU)

• FAPESP's process: 11/18728-5 - Study of migratory, effector and regulatory pattern of autoreactive t lymphocytes, previously transduced with GFP in experimental demyelinating diseases
• Grantee: Alessandro dos Santos Farias
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 11/15175-5 - Analysis of the effect of G-CSF in the neuritogenic cells migration and effector pattern during the clinical course of experimental autoimmune neuritis induced in Lewis rats
• Grantee: Fernando Pradella
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 12/01408-0 - Study of migratory, effector and regulatory pattern of autoreactive T lymphocytes, previously transduced with GFP in experimental demyelinating diseases
• Grantee: Alessandro dos Santos Farias
• Support Opportunities: Scholarships in Brazil - Young Researchers
• FAPESP's process: 11/15639-1 - Effect of type I interferon in the induction of tolerogenic function of plasmacytoid dendritic cells in experimental autoimmune encephalomyelitis
• Grantee: Mariana Peres Almeida Santos
• Support Opportunities: Scholarships in Brazil - Master