Sodium-dependent phosphate transporter 1 (PiT-1) (PiT-1)

Sodium-dependent phosphate transporter 1 (PiT-1), encoded by the SLC20A1 gene, is a transmembrane protein essential for maintaining cellular inorganic phosphate levels by facilitating sodium-coupled phosphate uptake [UniProt: Q06830]. It is ubiquitously expressed and serves as a critical regulator of various physiological processes, including bone mineralization and cell cycle progression [PubMed: 23539153]. In pathological contexts, PiT-1 is a key driver of vascular calcification, particularly in patients with chronic kidney disease, where elevated phosphate levels induce its expression in vascular smooth muscle cells, leading to their transformation into bone-like cells [PubMed: 18632857]. Additionally, PiT-1 has been identified as a receptor for the Gibbon ape leukemia virus, highlighting its diverse biological roles [PubMed: 11053244]. While drugs like foscarnet can inhibit PiT-1 activity, the development of highly selective inhibitors is a focus of current research to treat cardiovascular and metabolic diseases without disrupting systemic mineral balance [PubMed: 30213834]. Its role in promoting tumor cell proliferation also makes it a potential target in oncology [PubMed: 25614016].

Other names

SLC20A1GLVR1Gibbon ape leukemia virus receptor 1Phosphate transporter 1

Inhibition of sodium-dependent inorganic phosphate transport across the plasma membrane.