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To elucidate the role of Na(+)/Ca(2+) exchanger (NCX) in neurite outgrowth, we investigated the effects of NCX inhibitors on neurite outgrowth in PC12 cells. KB-R7943 and 3',4'-dichlorobenzamil, NCX inhibitors, inhibited the neurite outgrowth caused by nerve growth factor (NGF). NCX inhibitors inhibited the neurite outgrowth caused by dibutylyl cAMP, which rapidly reorganizes the cytoskeleton. KB-R7943 inhibited the neurite outgrowth caused by Y-27632, an inhibitor of Rho kinase (ROCK) that regulates actin. However, NCX inhibitors did not inhibit NGF-induced phosphorylation of extracellular signal-regulated kinase. These results suggest that NCX inhibitor affects downstream of the Rho-ROCK signal transduction pathways in neurite outgrowth.

Citation

Toru Oda, Toshiaki Kume, Yasuhiko Izumi, Kumatoshi Ishihara, Hachiro Sugmimoto, Akinori Akaike. Na+/Ca2+ exchanger inhibitors inhibit neurite outgrowth in PC12 cells. Journal of pharmacological sciences. 2011;116(1):128-31

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PMID: 21521931

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