Sodium- and chloride-dependent betaine transporter (BGT-1) (BGT-1)

The Sodium- and chloride-dependent betaine transporter (BGT-1), encoded by the SLC6A12 gene, is a member of the solute carrier family 6 (SLC6) that mediates the uptake of betaine and gamma-aminobutyric acid (GABA) across cell membranes (UniProt, P48065). In the kidney, BGT-1 plays a critical role in osmoregulation by accumulating betaine as an organic osmolyte to protect cells from hypertonic stress in the renal medulla (NCBI Gene, 6539). In the central nervous system, it is primarily localized to astrocytes and contributes to the regulation of extracellular GABA levels, particularly in the leptomeninges and perivascular spaces (PubMed, 16144488). Because of its role in GABA transport, BGT-1 has emerged as a potential therapeutic target for epilepsy and other seizure disorders. Pharmacological inhibition of BGT-1 can increase synaptic GABA concentrations, potentially providing anticonvulsant effects (PubMed, 25554145). However, its dual role in osmoregulation and neurotransmission necessitates careful consideration of systemic safety, particularly regarding renal function and osmotic balance.

Other names

SLC6A12Betaine/GABA transporter 1Sodium- and chloride-dependent betaine transporterBGT1

Inhibition of the transport of GABA and betaine into cells, thereby increasing extracellular GABA concentrations in the brain to enhance inhibitory neurotransmission.