{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\n KCNT2 encodes the “Slick” subunit of a sodium‐activated potassium (K⁺) channel that plays a key role in regulating cellular excitability. Slick channels are activated by increases in intracellular Na⁺ and Cl^– and contribute to slow afterhyperpolarizations, modulating action potential threshold and stabilizing resting membrane potentials in neurons (see"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "and."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "2"}]}, {"type": "t", "text": " Structural studies have demonstrated that specific Na⁺ coordination motifs and hydrophobic interactions—particularly involving regions in the S5 segment and near the pore helix—critically determine channel gating and open probability"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "3"}]}, {"type": "t", "text": "and."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "4"}]}, {"type": "t", "text": " In addition, Slick channels show pronounced sensitivity to changes in cell volume; when assembled into heteromeric complexes with the Slack (KCNT1) subunit, the overall volume responsiveness is graded by the number of Slick subunits present."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "5"}]}, {"type": "t", "text": " Clinically, gain‐of‐function mutations in KCNT2 have been linked to early-onset epileptic encephalopathies and developmental disorders with dysmorphic features—even in the absence of seizures—as these mutations tend to destabilize the closed conformation and promote a constitutively active channel state."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "6", "end_ref": "8"}]}, {"type": "t", "text": " Moreover, gene-based association analyses have implicated KCNT2 in substance use traits"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "9"}]}, {"type": "t", "text": ", and experimental evidence indicates that Slick channels are essential for anesthetic preconditioning–induced cardioprotection by mediating volatile anesthetic–stimulated K⁺ flux."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "10"}]}, {"type": "t", "text": " Collectively, these findings highlight KCNT2’s diverse roles in modulating excitability and cellular responses to metabolic and biophysical cues.\n "}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Sandra Rizzi, Hans-Günther Knaus, Christoph Schwarzer "}, {"type": "b", "children": [{"type": "t", "text": "Differential distribution of the sodium-activated potassium channels slick and slack in mouse brain."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Comp Neurol (2016)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1002/cne.23934"}], "href": "https://doi.org/10.1002/cne.23934"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "26587966"}], "href": "https://pubmed.ncbi.nlm.nih.gov/26587966"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Pedro L Martinez-Espinosa, Jianping Wu, Chengtao Yang, et al. 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