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Effect of Cholecalciferol therapy on serum FGF23 in vitamin D deficient patients: a randomized clinical trial

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Abstract

Introduction

Fibroblast growth factor-23 plays an important role in regulating systemic phosphate homeostasis, and vitamin D metabolism. However, the effect of Cholecalciferol therapy on FGF23 serum level in patients with vitamin D deficiency has not been studied, yet.

Materials and methods

This is a double-blind, randomized clinical trial on 119 vitamin D deficient patients in 2016. Biochemical variables of treatment and placebo groups were analyzed after 12 weeks of 50,000 IU of Cholecalciferol vs. placebo therapy once a week, by SPSS18.

Results

After Cholecalciferol therapy, delta of serum PTH in treatment group was less than the controls (P < 0.001). However, delta values of serum 25(OH)D3, 1,25(OH)2D3 and FGF23 in vitamin D treated group were more than the placebo-treated ones (P < 0.001, P = 0.002, and P = 0.04, respectively). Moreover, FGF23 serum level in treatment group was associated with serum calcium (P = 0.005, r = −0.256), and serum 1,25(OH)2D3 (P < 0.001, r = 0.529).

Conclusions

We propose that in these patients 1,25(OH)2D3 has a positive association with serum FGF23, and hypostasized that serum calcium might be a down regulator of serum FGF23.

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Acknowledgements

This study was supported by the Shiraz University of Medical Sciences with the Grant Number: 94-01-49-10264. The authors wish to thank the Research Consultation Center (RCC) at Shiraz University of Medical Sciences for their invaluable assistance in editing this article.

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Authors and Affiliations

  1. Shiraz Endocrinology and Metabolism Research Center, Shiraz University of Medical Sciences, P.O. Box: 71345-1744, Shiraz, Iran

    T. Kamelian, F. Saki, M. Jeddi, M. H. Dabbaghmanesh & G. H. R. Omrani

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  1. T. Kamelian
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  2. F. Saki
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  3. M. Jeddi
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  4. M. H. Dabbaghmanesh
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  5. G. H. R. Omrani
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Correspondence to F. Saki or G. H. R. Omrani.

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Conflict of interest

Tectom Kamelian, Gholamhossein Ranjbar Omrani, MarjanJeddi and Forough Saki declare that they have no conflict of interest.

Ethical approval

Shiraz University of Medical Sciences ethic committee approved this study with number 94-01-49-10264.

Informed consent

All the patients signed a written informed consent.

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There is no financial support.

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Kamelian, T., Saki, F., Jeddi, M. et al. Effect of Cholecalciferol therapy on serum FGF23 in vitamin D deficient patients: a randomized clinical trial. J Endocrinol Invest 41, 299–306 (2018). https://doi.org/10.1007/s40618-017-0739-2

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  • DOI: https://doi.org/10.1007/s40618-017-0739-2

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