{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nSolute carrier family 6 member 12 (SLC6A12), which encodes the betaine/GABA transporter 1 (BGT1), plays a central role in maintaining neurotransmitter balance and cellular osmolarity. It functions as a sodium‐ and chloride‐dependent transporter that mediates the uptake of γ‑aminobutyric acid (GABA) and betaine. This activity terminates GABAergic signaling in the central nervous system and contributes to osmolyte balance in diverse tissues such as astrocytes, platelets, and the renal medulla, illustrating its broad physiological importance."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "3"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nThe transporter’s activity is finely regulated by intracellular signaling pathways that control its trafficking and kinetics. Specifically, phosphorylation events mediated by protein kinases—including PKC and JAK2—have been shown to modulate SLC6A12’s insertion into the plasma membrane and its transport capacity. This dynamic regulation is essential for adjusting transporter activity in response to osmotic stress and other cellular signals."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "4", "end_ref": "6"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nGenetic and functional studies further implicate SLC6A12 in human disease. Variations in the SLC6A12 gene have been associated with altered GABAergic transmission and clinical conditions such as aspirin-intolerant asthma, schizophrenia with prominent negative symptoms, and temporal lobe epilepsy. Moreover, emerging findings suggest that dysregulation of SLC6A12 may contribute to neurotransmitter transport disorders implicated in Parkinson’s disease. These associations underscore the clinical significance of SLC6A12 in both neural and peripheral pathophysiology."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "7", "end_ref": "10"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "M-E Ruiz-Tachiquín, E Sánchez-Lemus, L-E Soria-Jasso, et al. 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