The immune cell transcriptome is modulated by vitamin D3 supplementation in people with a first demyelinating event participating in a randomized placebo-controlled trial
- PMID: 38479439
- DOI: 10.1016/j.clim.2024.110183
The immune cell transcriptome is modulated by vitamin D3 supplementation in people with a first demyelinating event participating in a randomized placebo-controlled trial
Abstract
Vitamin D deficiency is a risk factor for developing multiple sclerosis. The PrevANZ trial was conducted to determine if vitamin D3 supplementation can prevent recurrent disease activity in people with a first demyelinating event. As a sub-study of this trial, we investigated the effect of supplementation on peripheral immune cell gene expression. Participants were randomized to 1000, 5000 or 10,000 international units daily of vitamin D3 or placebo. Peripheral blood was collected at baseline and 12 weeks and sent for ribonucleic acid sequencing. Datasets from 55 participants were included. Gene expression was modulated by high dose supplementation. Antigen presentation and viral response pathways were upregulated. Oxidative phosphorylation and immune signaling pathways, including tumor necrosis factor-alpha and interleukin-17 signaling, were downregulated. Overall, vitamin D3 supplementation for 12 weeks modulated the peripheral immune cell transcriptome with induction of anti-inflammatory gene expression profiles. Our results support a dose-dependent effect of vitamin D3 supplementation on immune gene expression.
Keywords: Clinically isolated syndrome; First demyelinating event; Gene expression; Multiple sclerosis; Vitamin D.
Copyright © 2024 The Author(s). Published by Elsevier Inc. All rights reserved.
Conflict of interest statement
Declaration of competing interest WZY received research support from MS Australia, the Australian Government Research Training Program and the Monash University Postgraduate Publications Award during the conduct of the study. BT received funding for travel and speaker honoraria from Bayer Schering Pharma, CSL Australia, Biogen and Novartis, and has served on advisory boards for Biogen, Novartis, Roche and CSL Australia. AVdW has served on advisory boards and receives unrestricted research grants from Novartis, Biogen, Merck and Roche; she has received speaker's honoraria and travel support from Novartis, Roche, Biogen and Merck; she receives grant support from the National Health and Medical Research Council of Australia and MS Australia. VJ received conference travel support from Merck and Roche and speaker's honoraria from Biogen and Roche outside of the submitted work; she receives research support from the Australian National Health and Medical Research Grant and MS Australia. HB has received institutional (Monash University) funding from Biogen, F. Hoffmann-La Roche Ltd., Merck, Alexion, CSL, and Novartis; has carried out contracted research for Novartis, Merck, F. Hoffmann-La Roche Ltd. and Biogen; has taken part in speakers' bureaus for Biogen, Genzyme, UCB, Novartis, F. Hoffmann-La Roche Ltd. and Merck; has received personal compensation from Oxford Health Policy Forum for the Brain Health Steering Committee. Other authors report no relevant competing interests.
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