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Pediatric Nephrology

, Volume 27, Issue 11, pp 2039–2048 | Cite as

Phosphate homeostasis and its role in bone health

  • Maria Goretti M. G. Penido
  • Uri S. AlonEmail author
Educational Review

Abstract

Phosphate is one of the most abundant minerals in the body, and its serum levels are regulated by a complex set of processes occurring in the intestine, skeleton, and kidneys. The currently known main regulators of phosphate homeostasis include parathyroid hormone (PTH), calcitriol, and a number of peptides collectively known as the “phosphatonins” of which fibroblast growth factor-23 (FGF-23) has been best defined. Maintenance of extracellular and intracellular phosphate levels within a narrow range is important for many biological processes, including energy metabolism, cell signaling, regulation of protein synthesis, skeletal development, and bone integrity. The presence of adequate amounts of phosphate is critical for the process of apoptosis of mature chondrocytes in the growth plate. Without the presence of this mineral in high enough quantities, chondrocytes will not go into apoptosis, and the normal physiological chain of events that includes invasion of blood vessels and the generation of new bone will be blocked, resulting in rickets and delayed growth. In the rest of the skeleton, hypophosphatemia will result in osteomalacia due to an insufficient formation of hydroxyapatite. This review will address phosphate metabolism and its role in bone health.

Keywords

Phosphate Vitamin D FGF-23 Parathyroid hormone Growth plate Chondrocytes 

Notes

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Copyright information

© IPNA 2012

Authors and Affiliations

  1. 1.Pediatric Nephrology Unit, Clinics Hospital, School of MedicineFederal University of Minas GeraisBelo HorizonteBrazil
  2. 2.Bone and Mineral Disorders Clinic, Section of Pediatric Nephrology, Children’s Mercy Hospital and ClinicsUniversity of Missouri at Kansas CityKansas CityUSA

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