VGF and hereditary pheochromocytoma-paraganglioma: The vgf (non acronymic) is a neutrophin-induced gene encoding for a primary product, VGF precursor or pro-VGF, composed of 617/615 amino acids (rat/mouse and human respectively) discovered because of a selective up-regulation by NGF in the rat pheochromocytoma cells (Levi et al., 1985).