Cholecalciferol supplementation increases FGF23 in peritoneal dialysis patients with hypovitaminosis D: a randomized clinical trial View Full Text


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Article Info

DATE

2019-03-19

AUTHORS

Juan C. Ramirez-Sandoval, Mauricio Arvizu-Hernandez, Cristino Cruz, Barbara Vazquez-Cantu, Luis J. Rojas-Concha, Luis Tamez, Fagundo Reynerio, F. Enrique Gomez, Ricardo Correa-Rotter

ABSTRACT

BackgroundVitamin D deficiency is common in peritoneal dialysis (PD) patients, so its supplementation has been advocated as potentially beneficial.MethodsDouble-blind, placebo-controlled, randomized clinical trial. Subjects on PD treated with high calcium peritoneal dialysate (Ca 3.5 mEq/l) and serum levels of 25-hydroxi vitamin D (25D) < 20 ng/ml were randomized to receive cholecalciferol (4800 IU/daily) or placebo for 16 weeks. The outcome measures were the effects on the osteogenic biomarkers osteoprotegerin (primary endpoint), intact fibroblast growth factor-23 (iFGF23), osteocalcin, osteopontin, iPTH, 1,25-dyhydroxivitamin D (1,25D), and interleukin-6.ResultsFifty-eight subjects were randomly assigned. Baseline characteristics were similar in both groups. Cholecalciferol supplemented subjects had a significant increase in serum 25D (from 11.4 ± 5.0 to 28.3 ± 10.3 ng/ml), 1,25D and iFGF23 compared with placebo group. iFGF23 levels increased an average of 10,875 pg/ml per month (95% CI 11,778–88,414) in the cholecalciferol group and was unchanged in the placebo group (2829 pg/ml, 95% CI − 2181 to 14,972). Extremely high iFGF23 levels (> 30,000 pg/ml) were observed in 74% of subjects receiving cholecalciferol although iFGF23 returned to baseline values after 32 weeks of withdrawal. The observed changes in iFGF23 correlated with 1,25D levels and were not modified by other variables. No difference was observed between groups in osteoprotegerin or other osteogenic biomarkers levels.ConclusionsCholecalciferol supplementation increases serum 25D levels in subjects on PD exposed to high calcium dialysate, yet it induces an exponential increase of iFGF23 in most patients, which disappear after withdrawal of supplementation and may be a major concern for this maneuver. More... »

PAGES

645-659

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    https://www.ncbi.nlm.nih.gov/pubmed/30888584


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        "description": "BackgroundVitamin D deficiency is common in peritoneal dialysis (PD) patients, so its supplementation has been advocated as potentially beneficial.MethodsDouble-blind, placebo-controlled, randomized clinical trial. Subjects on PD treated with high calcium peritoneal dialysate (Ca 3.5\u00a0mEq/l) and serum levels of 25-hydroxi vitamin D (25D)\u2009<\u200920\u00a0ng/ml were randomized to receive cholecalciferol (4800\u00a0IU/daily) or placebo for 16 weeks. The outcome measures were the effects on the osteogenic biomarkers osteoprotegerin (primary endpoint), intact fibroblast growth factor-23 (iFGF23), osteocalcin, osteopontin, iPTH, 1,25-dyhydroxivitamin D (1,25D), and interleukin-6.ResultsFifty-eight subjects were randomly assigned. Baseline characteristics were similar in both groups. Cholecalciferol supplemented subjects had a significant increase in serum 25D (from 11.4\u2009\u00b1\u20095.0 to 28.3\u2009\u00b1\u200910.3\u00a0ng/ml), 1,25D and iFGF23 compared with placebo group. iFGF23 levels increased an average of 10,875\u00a0pg/ml per month (95% CI 11,778\u201388,414) in the cholecalciferol group and was unchanged in the placebo group (2829\u00a0pg/ml, 95% CI \u2212 2181 to 14,972). Extremely high iFGF23 levels (>\u200930,000\u00a0pg/ml) were observed in 74% of subjects receiving cholecalciferol although iFGF23 returned to baseline values after 32 weeks of withdrawal. The observed changes in iFGF23 correlated with 1,25D levels and were not modified by other variables. No difference was observed between groups in osteoprotegerin or other osteogenic biomarkers levels.ConclusionsCholecalciferol supplementation increases serum 25D levels in subjects on PD exposed to high calcium dialysate, yet it induces an exponential increase of iFGF23 in most patients, which disappear after withdrawal of supplementation and may be a major concern for this maneuver.", 
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