Fibroblast growth factor-23 (FGF-23) is a bone-derived hormone which is secreted by osteocytes and osteoblasts. It is part of the atypical FGF subfamily. The gene encoding it is localized on human chromosome 12p13. Anti-FGF23 Antibody detects endogenous levels of total FGF23 protein.
The FGF family plays a central role during prenatal development and postnatal growth and regeneration of a variety of tissues, by promoting cellular proliferation and differentiation. Fibroblast growth factor-23, -21 and -19 (FGF-23, FGF-21 and FGF-19) act as circulating hormones and require the participation of a Klotho protein as a co-receptor for their signaling. The signaling receptor for FGF-23, a Klotho-FGFR1 (IIIc) complex, is an essential regulator of the renal sodium phosphate co-transporter and key vitamin D-metabolizing enzymes cytochrome P450 family 27 subfamily B member 1 (CYP27B1) and cytochrome P450 family 24 subfamily A member 1 (CYP24A1). FGF-23 acts in the kidney to regulate phosphate homeostasis and vitamin D metabolism.
Fibroblast Growth Factor-23 Human Recombinant produced in E.Coli is a single, non-glycosylated polypeptide chain containing a total of 228 amino acids and having a molecular mass of 22.5kDa.
The FGF-23 is and purified by chromatographic techniques.
FGF-23 is a member of the fibroblast growth factor (FGF) family. FGF family members possess broad mitogenic and cell survival activities and are involved in a variety of biological processes including embryonic development, cell growth, morphogenesis, tissue repair, tumor growth and invasion. FGF-23 inhibits renal tubular phosphate transport. The FGF-23 gene was identified by its mutations associated with autosomal dominant hypophosphatemic rickets (ADHR), an inherited phosphate wasting disorder. Abnormally high level expression of FGF-23 was found in oncogenic hypophosphatemic osteomalacia (OHO), a phenotypically similar disease caused by abnormal phosphate metabolism. FGF-23 mutations have also been shown to cause familial tumoral calcinosis with hyperphosphatemia.
