FGF-13

FGF-13 (FHF3) is an X-linked intracrine factor expressed in brain, heart, skeletal muscle and dorsal root ganglia. It functions inside cells as a modulator of voltage-gated sodium channels, notably Nav1.5 in cardiomyocytes and Nav1.6 in neurons, and has been implicated in neuronal migration during cortical development and in setting cardiac action potential duration. Loss-of-function mutations in FGF13 cause Borjeson-Forssman-Lehmann syndrome, an X-linked intellectual disability disorder, and elevated FGF13 expression has been reported in some cancers. Recombinant FGF-13 protein is used for sodium channel electrophysiology, FHF interaction studies and investigations of X-linked intellectual disability mechanisms.