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Vitamin B6 supplementation improves pro-inflammatory responses in patients with rheumatoid arthritis

European Journal of Clinical Nutrition volume 64, pages 1007–1013 (2010)Cite this article

Subjects

Abstract

Background/Objectives:

The purpose of this study was to investigate whether vitamin B6 supplementation had a beneficial effect on inflammatory and immune responses in patients with rheumatoid arthritis (RA).

Subjects/Methods:

This was a single-blind co-intervention study performed at the Division of Allergy, Immunology and Rheumatology of Chung Shan Medical University Hospital, Taiwan. Patients were diagnosed with RA according to the 1991 American College of Rheumatology criteria for RA. Patients were randomly allocated into two groups: control (5 mg/day folic acid only; n=15) or vitamin B6 (5 mg/day folic acid plus 100 mg/day vitamin B6; n=20) for 12 weeks. Plasma pyridoxal 5′-phosphate (PLP), serum folate, inflammatory parameters (that is, high-sensitivity C-reactive protein (hs-CRP), erythrocyte sedimentation rate (ESR), interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α)) and immune parameters (that is, white blood cell, total lymphocyte, T-cell (CD3), B-cell (CD19), T-helper cell (CD4), T-suppressor (CD8)) were measured on day 1 (week 0) and after 12 weeks (week 12) of the intervention.

Results:

In the group receiving vitamin B6, plasma IL-6 and TNF-α levels significantly decreased at week 12. There were no significant changes with respect to immune responses in both groups except for the percentage of total lymphocytes in the vitamin B6 group when compared with week 0 and week 12. Plasma IL-6 level remained significantly inversely related to plasma PLP after adjusting for confounders (β=−0.01, P=0.01).

Conclusions:

A large dose of vitamin B6 supplementation (100 mg/day) suppressed pro-inflammatory cytokines (that is, IL-6 and TNF-α) in patients with RA.

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Acknowledgements

This study was supported by the National Science Council, Taiwan, ROC (NSC-94-2320-B-040-031).

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Authors and Affiliations

  1. School of Nutrition, Chung Shan Medical University, Taichung, Taiwan

    S-C Huang & Y-C Huang

  2. Division of Allergy, Department of Medicine, Immunology and Rheumatology, Chung Shan Medical University Hospital, Chung Shan Medical University, Taichung, Taiwan

    J C-C Wei

  3. Division of Cardiology, Department of Internal of Medicine, Chung Shan Medical University Hospital, Taichung, Taiwan

    D J Wu

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  1. S-C Huang
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  2. J C-C Wei
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  3. D J Wu
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  4. Y-C Huang
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Correspondence to Y-C Huang.

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Guarantor: Y-C Huang. Contributors: S-CH was responsible for data coding, hematological measurements, sample analyses and statistical analyses. JC-CW was responsible for the screening and intervention of subjects and interpretation of the results. DJW was responsible for the screening and flow-mediated vasodilation 2D imaging measurement of the brachial artery. Y-CH was responsible for the development of intellectual content and study design, interpretation of the results and drafting of the paper.

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Huang, SC., Wei, JC., Wu, D. et al. Vitamin B6 supplementation improves pro-inflammatory responses in patients with rheumatoid arthritis. Eur J Clin Nutr 64, 1007–1013 (2010). https://doi.org/10.1038/ejcn.2010.107

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