FGF-23 Fibroblast Growth Factor 23
FGF-23 is produced in osteoblast precursor cells and is a potent regulator of phosphate and vitamin D metabolism.
Phosphate plays an essential role in the stability of skeletal bones and energy metabolism as well as in DNA synthesis and intracellular signal cascades.
FGF-23 inhibits in combination with cofactor Klotho phosphate reabsorption in renal proximal tubular cells via FGF-23 receptors (increased phosphate loss, reduced serum phosphate) and decreases calcitriol synthesis by suppressing alpha-1-hydroxylase. |