Inhibition of voltage-gated K(+) channels and Ca(2+) channels by diphenidol.
Journal Title: Pharmacological Reports - Year 2012, Vol 64, Issue 3
Abstract
Background: Although diphenidol has long been deployed as an anti-emetic and anti-vertigo drug, its mechanism of action remains unclear. In particular, little is known as to how diphenidol affects neuronal ion channels. Recently, we showed that diphenidol blocked neuronal voltage-gated Na(+) channels, causing spinal blockade of motor function, proprioception and nociception in rats. In this work, we investigated whether diphenidol could also affect voltage-gated K(+) and Ca(2+) channels. Methods: Electrophysiological experiments were performed to study ion channel activities in two neuronal cell lines, namely, neuroblastoma N2A cells and differentiated NG108-15 cells. Results: Diphenidol inhibited voltage-gated K(+) channels and Ca(2+) channels, but did not affect store-operated Ca(2+) channels. Conclusion: Diphenidol is a non-specific inhibitor of voltage-gated ion channels in neuronal cells.
Authors and Affiliations
Yuk-Man Leung, Kar-Lok Wong, Ka-Shun Cheng, Chang-Shin Kuo, Tzu-Hui Su, Yu-Wen Chen, Tzu-Hurng Cheng
Keywords
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