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Updated: Aug 29, 2026

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Published on: January 13, 2014
Picrotoxin increased acetylcholine release from rat cultured embryonic septal neurons
Takeshi Suzuki1, Ryoichi Takagi, Koichiro Kawashima
1Department of Pharmacology, Kyoritsu College of Pharmacy, 1-5-30 Shibakoen, Minato-ku, Tokyo 105-8512, Japan. suzuki-tk@kyoritsu-ph.ac.jp
Abstract:
GABA is a major inhibitory neurotransmitter in the mature mammalian brain. In the early stages of brain development, it has been reported that GABA(A) receptor stimulation and the associated increase in Cl(-) conductance lead to membrane depolarization. In this study, we tested the effects of picrotoxin, a GABA(A) receptor Cl(-) channel blocker, on spontaneously released acetylcholine (ACh) from cultured rat embryonic septal cells. Picrotoxin increased spontaneously released ACh. These results indicate that blockade of GABA-activated Cl(-) channel increases neuronal excitability even in an early stage of the development.
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