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High serum phosphorus and FGF 23 levels are associated with progression of coronary calcifications

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Abstract

Background

Coronary calcifications (CC) portend increased mortality in adults receiving hemodialysis (HD), however the risk factors associated with CC progression are not well known in pediatric patients. Our previous cross-sectional studies demonstrated high CC prevalence (31 %) in pediatric patients, which were significantly associated with high serum phosphorus (P), fibroblast growth factor 23 (FGF) levels, dialysis vintage, and low cholesterol. The current study was undertaken to determine and elucidate CC progression in pediatric HD patients.

Methods

A 1-year prospective longitudinal study of 16 pediatric patients (ten male; mean age, 16.9 ± 3 years; range, 10.1–20.4 years) receiving chronic HD was conducted.

Results

CC were observed in five of 16 (31.3 %) patients on baseline computed tomogram (CT) scan; 14/16 patients underwent 1-year CT. All patients with initial CC who completed CT at 1 year (3/5) progressed; one patient had new CC and none of the patients had resolved CC. Mean Agatston score increased from 23.4 ± 18.06 HU (baseline) to 169 ± 298.9 HU. Patients with CC progression had higher mean serum P (8.6 ± 1.8 mg/dl vs. 6.3 ± 1.1 mg/dl, p = 0.015) and FGF 23 levels (3,994 ± 860.5 pg/ml vs. 2,327 ± 1,206.4 pg/ml, p = 0.028). Serum P and FGF 23 levels were positively correlated with final Agatston scores (R = 0.65, p = 0.01 for serum P and R = 0.54, p = 0.045 for FGF 23) and change in Agatston scores (R = 0.65, p = 0.01 for serum P and R = 0.52, p = 0.048 for FGF 23).

Conclusions

Our study shows that CC is progressive in pediatric patients receiving HD and that increased serum P and FGF 23 levels are associated with this progression.

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Authors and Affiliations

  1. Texas Children’s Hospital—Pediatric Nephrology, Baylor College of Medicine, 6621 Fannin Street, MC 3–2482, Houston, TX, 77030, USA

    Poyyapakkam R. Srivaths

  2. Section of Pediatric Nephrology, Cincinnati Children’s Hospital, Cincinnati, OH, USA

    Stuart L. Goldstein

  3. Texas Children’s Hospital—Radiology, Baylor College of Medicine, Houston, TX, USA

    Rajesh Krishnamurthy

  4. Renal Devices Branch, Food and Drug Administration, Silver Spring, MD, USA

    Douglas M. Silverstein

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  1. Poyyapakkam R. Srivaths
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  2. Stuart L. Goldstein
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  3. Rajesh Krishnamurthy
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  4. Douglas M. Silverstein
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Correspondence to Poyyapakkam R. Srivaths.

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Srivaths, P.R., Goldstein, S.L., Krishnamurthy, R. et al. High serum phosphorus and FGF 23 levels are associated with progression of coronary calcifications. Pediatr Nephrol 29, 103–109 (2014). https://doi.org/10.1007/s00467-013-2575-8

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