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The Effect of Vitamin D Supplementation on Fibroblast Growth Factor-23 in Patients With Chronic Kidney Disease: A Systematic Review and Meta-Analysis Publisher Pubmed



Karimi E1 ; Bitarafan S2 ; Mousavi SM1 ; Zargarzadeh N3 ; Mokhtari P4 ; Hawkins J5 ; Meysamie A6 ; Koohdani F7, 8
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Authors Affiliations
  1. 1. Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Students' Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Iranian Center of Neurological Research, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Department of Nutrition and Integrative Physiology, College of Health, University of Utah, Salt Lake City, UT, United States
  5. 5. Integrative Health, Franklin School of Integrative Health Sciences, Franklin, TN, United States
  6. 6. Department of Community Medicine, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
  7. 7. Diabetes Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
  8. 8. Department of Cellular and Molecular Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran

Source: Phytotherapy Research Published:2021


Abstract

This is a meta-analysis of randomized controlled trials (RCTs) investigating the effects of oral vitamin D supplementation on serum fibroblast growth factor-23 (FGF23) concentrations in patients with chronic kidney disease (CKD). Manuscripts were extracted from PubMed/MEDLINE, Scopus, and ISI Web of Science through February 2020. Subgroup analyses, sensitivity analysis, and meta-regression assessments were performed. A total of eight clinical trials with nine treatment arms were included in the final analysis. The pooled results showed no significant changes in circulating FGF23 following vitamin D supplementation compared to the control group (Standardized mean difference (SMD): 0.24; 95% confidence intervals (CIs): −0.03 to 0.50, p > 0.05). Subgroup analyses found that studies which had participants with a body mass index (BMI) higher than 25 kg/m2, with an intervention duration shorter than 15 weeks, using phosphate binder medications, and trials that were on both patients with CKD undergoing hemodialysis and patients without hemodialysis treatment produced significant increases in FGF23 when concentration compared with the control group. This meta-analysis provides evidence that vitamin D supplementation does not have a significant effect on plasma FGF23 levels. However, further high-quality trials are required to identify the influence of oral vitamin D supplementation on FGF23 levels in patients with CKD. © 2021 John Wiley & Sons Ltd.
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