Phosphate binders, vitamin D and calcimimetics in the management of chronic kidney disease-mineral bone disorders (CKD-MBD) in children

Pediatr Nephrol. 2013 Apr;28(4):617-25. doi: 10.1007/s00467-012-2381-8. Epub 2013 Feb 5.

Abstract

In order to minimize complications on the skeleton and to prevent extraskeletal calcifications, the specific aims of the management of chronic kidney disease mineral and bone disorder (CKD-MBD) are to maintain blood levels of serum calcium and phosphorus as close to the normal range as possible, thereby maintaining serum parathyroid hormone (PTH) at levels appropriate for CKD stage, preventing hyperplasia of the parathyroid glands, avoiding the development of extra-skeletal calcifications, and preventing or reversing the accumulation of toxic substances such as aluminum and β2-microglobulin. In order to limit cardiovascular calcification, daily intake of elemental calcium, including from dietary sources and from phosphate binders, should not exceed twice the daily recommended intake for age and should not exceed 2.5 g/day. Calcium-free phosphate binders, such as sevelamer hydrochloride and sevelamer carbonate, are safe and effective alternatives to calcium-based binders, and their use widens the margin of safety for active vitamin D sterol therapy. Vitamin D deficiency is highly prevalent across the spectrum of CKD, and replacement therapy is recommended in vitamin D-deficient and insufficient individuals. Therapy with active vitamin D sterols is recommended after correction of the vitamin D deficiency state and should be titrated based on target PTH levels across the spectrum of CKD. Although the use of calcimimetic drugs has been proven to effectively control the biochemical features of secondary hyperparathyroidism, there is very limited experience with the use of such agents in pediatric patients and especially during the first years of life. Studies are needed to further define the role of such agents in the treatment of pediatric CKD-MBD.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Biomarkers / blood
  • Bone Diseases, Metabolic / blood
  • Bone Diseases, Metabolic / drug therapy*
  • Bone Diseases, Metabolic / etiology
  • Calcimimetic Agents / adverse effects
  • Calcimimetic Agents / therapeutic use*
  • Calcium / blood*
  • Chelating Agents / adverse effects
  • Chelating Agents / therapeutic use*
  • Child
  • Humans
  • Phosphates / blood*
  • Renal Insufficiency, Chronic / blood
  • Renal Insufficiency, Chronic / complications
  • Renal Insufficiency, Chronic / therapy*
  • Treatment Outcome
  • Vitamin D / adverse effects
  • Vitamin D / blood
  • Vitamin D / therapeutic use*
  • Vitamin D Deficiency / blood
  • Vitamin D Deficiency / drug therapy
  • Vitamins / adverse effects
  • Vitamins / therapeutic use*

Substances

  • Biomarkers
  • Calcimimetic Agents
  • Chelating Agents
  • Phosphates
  • Vitamins
  • Vitamin D
  • Calcium