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  • Title: Efflux of 45Ca from bovine adrenal medulla cells in culture caused by nicotinic receptor stimulation.
    Author: Wada A, Izumi F, Yashima N, Kobayashi H, Toyohira Y, Yanagihara N.
    Journal: Neurosci Lett; 1984 Jun 01; 47(1):69-74. PubMed ID: 6462531.
    Abstract:
    Efflux of 45Ca was investigated in cultured bovine adrenal medulla cells with its relation to Ca influx. Carbachol caused a rapid and transient efflux of 45Ca from 45C preloaded cells which proceeded with a similar time course to 45Ca influx. Nicotine also caused efflux of 45Ca that is completely antagonized by hexamethonium, while muscarine and pilocarpine did not cause 45Ca efflux. Nicotine-induced efflux of 45Ca was abolished by the Ca-antagonist, diltiazem, and was not observed in Ca-free medium. These observations show that in bovine adrenal medulla, not only the influx of Ca but also the efflux of Ca are caused by nicotinic receptor stimulation and that the efflux of Ca is dependent on the Ca in the medium.
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