Minireview: fibroblast growth factor 23 in phosphate homeostasis and bone metabolism.

Fibroblast growth factor 23 (FGF23) was identified in 2000. Since then, FGF23 has been found to physiologically regulate phosphate metabolism and aberrant actions of FGF23 results in several disorders of phosphate and bone metabolism. In addition, FGF23 plays an important role in the development of chronic kidney disease-mineral and bone disorder. However, further investigations are necessary, especially with regard to the regulation of FGF23 expression. In this minireview, we focus on the physiological and pathophysiological significance of FGF23 in phosphate and bone metabolism.