NCT01705457

Impact of Vitamin A on RAR Gene Expression in Multiple Sclerosis

Impact of Vitamin A Supplementation on RAR Gene Expression in PBMC Cells in Multiple Sclerotic Patients

• Status: Unknown
• Phase: Phase 4
• Study type: Interventional
• Enrollment: 20 (estimated)
• Sponsor: Tehran University of Medical Sciences · Academic / Other
• Sex: All
• Age: 20 Years – 45 Years
• Healthy volunteers: Not accepted

Summary

The aim of this study is the comparison between the effects of supplementation with 25000 IU preformed vitamin A (retinyl palmitate)on retinoic acid receptor and retinoic x receptor expression.

Detailed description

Multiple Sclerosis (MS) is a chronic inflammatory disease where Th1 like responses from myelin-specific CD4+ T cells, as secretion of pro-inflammatory IFNγ, are believed to play a major role in the pathogenesis. The myelin-specific T cells that mediate tissue destruction in MS are believed to become activated outside the central nervous system (CNS) in lymphoid tissue and when they cross the blood brain barrier they will re-encounter their antigen. Immune deviation is the redirection of the immune response from most often Th1 like responses to Th2 like responses, even though the opposite can also occur. Vitamin A or Vitamin A-like analogs known as retinoids, are potent hormonal modifiers of type 1 or type 2 responses but a definitive description of their mechanism(s) of action is lacking. High level dietary vitamin A enhances Th2 cytokine production and IgA responses, and is likely to decrease Th1 cytokine production. Retinoic acid(RA) inhibits IL12 production in activated macrophages, and RA pretreatment of macrophages reduces IFNγ production and increases IL4 production in antigen primed CD4 T cells. Supplemental treatment with vitamin A or RA decreases IFNγ and increases IL5, IL10, and IL4 production by increase of retinoic acid receptor and retinoic x receptor . Record Verification Date: August 2011

Conditions

• Relapsing Remitting Multiple Sclerosis

Interventions

Type	Name	Description
DRUG	Dietary Supplement: vitamin A	25000 IU/day vitamin A for 6 months 1 Cap/Day 1 cap placebo/day for 6 month
DRUG	placebo

Timeline

• Start date: 2010-02-01
• Primary completion: 2013-02-01
• Completion: 2013-08-01
• First posted: 2012-10-12
• Last updated: 2012-10-12

Locations

1 site across 1 country: Iran