ArticleActa pharmacologica Sinica2025
Huperzine A attenuates epileptic seizures via enhancing dCA1-projecting septal cholinergic transmission.
Article in Acta pharmacologica Sinica, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Cholinergic transmission, independent of classical glutamatergic and GABAergic signaling, critically plays a crucial role in epilepsy. Huperzine A (Hup A), an acetylcholinesterase (AChE) inhibitor, exerts potent anticonvulsant activity, but its mechanism of action within cholinergic circuits remains unclear. Here, we show that Hup A mitigates epileptic seizures by enhancing hippocampal dorsal CA1 (dCA1)-projecting cholinergic transmission. We found that systemic injection of Hup A not only reduces seizures in acute models, including the maximal-electroshock seizure (MES), pentylenetetrazol (PTZ), and kainic acid (KA) models but also alleviates the seizure severity in chronic epilepsy models induced by kindling and KA, indicating a broad-spectrum anti-seizure efficacy. Interestingly, using immunohistochemistry, viral tracing, and in vivo fiber photometry, we found that Hup A selectively inhibits AChE in the dCA1 rather than in other hippocampal subregions or cortex, enhancing dCA1-projecting septal cholinergic transmission. Significantly, selective ablation of septal ChAT
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