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- W4213375776 endingPage "3777" @default.
- W4213375776 startingPage "3754" @default.
- W4213375776 abstract "Anticonvulsants targeting K+ channels have not been clinically available, although neuronal hyperexcitability in seizures could be suppressed by activation of K+ channels. Voltage-gated A-type K+ channel (A-channel) inhibitors may be prescribed for diseases of neuromuscular junction but could cause seizures. Consistently, genetic loss of function of A-channels may also cause seizures. It is unclear why inhibition of A-channels, compared with other types of K+ channels, is particularly prone to seizure induction. This hinders the development of relevant therapeutic interventions.Mechanisms underlying epileptogenesis with A-channel inhibition and antiepileptic actions of A-channel activation were investigated with electrophysiological, pharmacological, optogenetic, and behavioral approaches.Pre-synaptic KV 1.4 and post-synaptic KV 4.3 A-channels act synergistically to gate glutamatergic transmission and control rhythmogenesis in the amygdala. The interconnected neurons set into the oscillatory mode by A-channel inhibition would reverberate with regular paces and the same top frequency, demonstrating a spatio-temporally well-orchestrated system with built-in oscillatory rhythms normally curbed by A-channels. Accordingly, selective over-excitation of glutamatergic neurons or inhibition of A-channels can induce behavioural seizures, which may be ameliorated by A-channel activators (e.g. NS-5806) or AMPA receptor antagonists (e.g. perampanel).Trans-synaptic voltage-dependent A-channels serve as a biophysical-biochemical transducer responsible for a novel form of synaptic plasticity. Such a network-level switch into and out of the oscillatory mode may underlie a wide scope of telencephalic information processing or, at its extreme, epileptic seizures. A-channels thus constitute a potential target of antiepileptic therapy." @default.
- W4213375776 created "2022-02-24" @default.
- W4213375776 creator A5025269482 @default.
- W4213375776 creator A5064209678 @default.
- W4213375776 creator A5067463471 @default.
- W4213375776 creator A5069704071 @default.
- W4213375776 creator A5071289172 @default.
- W4213375776 creator A5080946525 @default.
- W4213375776 date "2022-03-15" @default.
- W4213375776 modified "2023-10-14" @default.
- W4213375776 title "Pre‐synaptic and post‐synaptic A‐type K <sup>+</sup> channels regulate glutamatergic transmission and switching of the network into epileptiform oscillations" @default.
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