While the importance of fibroblast growth factor (FGF)-23 is established in phosphate-wasting disorders, little is known about the mechanisms regulating its circulating level. To investigate the role of parathyroid hormone (PTH) and calcium in FGF-23 metabolism, we examined plasma FGF-23 levels in patients with primary hyperparathyroidism (PHPT).
Department of Metabolism, Endocrinology and Molecular Medicine, Osaka City University Graduate School of Medicine 1-4-3, Asahi-machi, Abeno-ku, Osaka 545-8585, Japan.