The Emerging Role of Nutritional Vitamin D in Secondary Hyperparathyroidism in CKD

In chronic kidney disease (CKD), hyperphosphatemia induces fibroblast growth factor-23 (FGF-23) expression that disturbs renal 1,25-dihydroxy vitamin D (1,25D) synthesis; thereby increasing parathyroid hormone (PTH) production. FGF-23 acts on the parathyroid gland (PTG) to increase 1α-hydroxylase ac...

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Veröffentlicht in:Nutrients 2018-12, Vol.10 (12), p.1890
Hauptverfasser: Lu, Chien-Lin, Yeih, Dong-Feng, Hou, Yi-Chou, Jow, Guey-Mei, Li, Zong-Yu, Liu, Wen-Chih, Zheng, Cai-Mei, Lin, Yuh-Feng, Shyu, Jia-Fwu, Chen, Remy, Huang, Chung-Yu, Lu, Kuo-Cheng
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container_issue 12
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container_title Nutrients
container_volume 10
creator Lu, Chien-Lin
Yeih, Dong-Feng
Hou, Yi-Chou
Jow, Guey-Mei
Li, Zong-Yu
Liu, Wen-Chih
Zheng, Cai-Mei
Lin, Yuh-Feng
Shyu, Jia-Fwu
Chen, Remy
Huang, Chung-Yu
Lu, Kuo-Cheng
description In chronic kidney disease (CKD), hyperphosphatemia induces fibroblast growth factor-23 (FGF-23) expression that disturbs renal 1,25-dihydroxy vitamin D (1,25D) synthesis; thereby increasing parathyroid hormone (PTH) production. FGF-23 acts on the parathyroid gland (PTG) to increase 1α-hydroxylase activity and results in increase intra-gland 1,25D production that attenuates PTH secretion efficiently if sufficient 25D are available. Interesting, calcimimetics can further increase PTG 1α-hydroxylase activity that emphasizes the demand for nutritional vitamin D (NVD) under high PTH status. In addition, the changes in hydroxylase enzyme activity highlight the greater parathyroid 25-hydroxyvitmain D (25D) requirement in secondary hyperparathyroidism (SHPT); the higher proportion of oxyphil cells as hyperplastic parathyroid progression; lower cytosolic vitamin D binding protein (DBP) content in the oxyphil cell; and calcitriol promote vitamin D degradation are all possible reasons supports nutritional vitamin D (NVD; e.g., Cholecalciferol) supplement is crucial in SHPT. Clinically, NVD can effectively restore serum 25D concentration and prevent the further increase in PTH level. Therefore, NVD might have the benefit of alleviating the development of SHPT in early CKD and further lowering PTH in moderate to severe SHPT in dialysis patients.
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thereby increasing parathyroid hormone (PTH) production. FGF-23 acts on the parathyroid gland (PTG) to increase 1α-hydroxylase activity and results in increase intra-gland 1,25D production that attenuates PTH secretion efficiently if sufficient 25D are available. Interesting, calcimimetics can further increase PTG 1α-hydroxylase activity that emphasizes the demand for nutritional vitamin D (NVD) under high PTH status. In addition, the changes in hydroxylase enzyme activity highlight the greater parathyroid 25-hydroxyvitmain D (25D) requirement in secondary hyperparathyroidism (SHPT); the higher proportion of oxyphil cells as hyperplastic parathyroid progression; lower cytosolic vitamin D binding protein (DBP) content in the oxyphil cell; and calcitriol promote vitamin D degradation are all possible reasons supports nutritional vitamin D (NVD; e.g., Cholecalciferol) supplement is crucial in SHPT. Clinically, NVD can effectively restore serum 25D concentration and prevent the further increase in PTH level. 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subjects blood serum
Calciferol
Calcification
Calcitriol
cholecalciferol
Dialysis
Enzymatic activity
Enzyme activity
Enzymes
Fibroblast growth factor 23
fibroblasts
Gene expression
Growth factors
Hemodialysis
Homeostasis
Hydroxylase
Hyperparathyroidism
Hyperphosphatemia
Hyperplasia
Hypocalcemia
Kidney diseases
Metabolism
Mortality
Parathyroid
Parathyroid gland
Parathyroid hormone
Pathophysiology
patients
Population
Review
secretion
Vitamin D
vitamin D-binding protein
Vitamin deficiency
title The Emerging Role of Nutritional Vitamin D in Secondary Hyperparathyroidism in CKD
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