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- W2022129114 abstract "1. The effects of adrenergic and serotonergic drugs on luminescence induced by electrical stimulation, adrenaline and noradrenaline were investigated from isolated strips of skin photophores of Porichthys notatus. 2. The luminescent response to repeated exposure to adrenaline or noradrenaline displayed concentration-dependent changes in amplitude, higher doses resulting in a drop and lower doses in an increase of amplitude of responses elicited after the initial response. 3. Phenylephrine induced luminescence at a low concentration (100 nM), whereas isoproterenol was ineffective. The alpha (phentolamine, yohimbine) and beta antagonists (metoprolol, propranolol) all suppressed to a large extent luminescent responses to electrical and catecholamine stimulation. 4. Serotonin (5-HT, 1–10 μM) suppressed non-facilitated luminescent responses to electrical stimulation, but failed to influence the facilitated responses. 5-HT also reduced the luminescent responses to consecutive adrenaline challenges in a concentration-dependent manner. 5. Methysergide (10 μM) antagonized the inhibitory action of 5-HT on, and potentiated responses to, electrical stimulation. It was ineffective on adrenaline-induced responses. 6. The results suggest that alpha adrenoceptors are the principal receptor type mediating luminescence excitation in Porichthys photophores. An inhibitory presynaptic role is postulated for 5-HT, although a postsynaptic mechanism may also be present." @default.
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- W2022129114 date "1983-01-01" @default.
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- W2022129114 title "A pharmacological study of adrenergic and serotonergic mechanisms in the photophores of the midshipman fish, Porichthys notatus" @default.
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- W2022129114 doi "https://doi.org/10.1016/0742-8413(83)90112-3" @default.
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