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- W3089451489 abstract "Abstract Whole-cell patch-clamp recordings from identified centrifugal neurons of the optic lobe in a slice preparation allowed the characterization of five voltage-dependent currents; two outward and three inward currents. The outward currents were; the 4-aminopyridine-sensitive transient potassium or A-current (I A ), the TEA-sensitive sustained current or delayed rectifier (I K ). The inward currents were; the tetrodotoxin-sensitive transient current or sodium current (I Na ). The second is the cobalt- and cadmium-sensitive sustained current which is enhanced by barium and blocked by the dihydropyridine antagonist, nifedipine suggesting that it could be the L-type calcium current (I CaL ). Finally, another transient inward current, also carried by calcium, but unlike the L-type, this current is activated at more negative potentials and resembles the low-voltage-activated or T-type calcium current (I CaT ) of other preparations. Application of the neuropeptide FMRFamide caused a significant attenuation to the peak amplitude of both sodium and sustained calcium currents without any apparent effect on the transient calcium current. Furthermore, FMRFamide also caused a reduction of both outward currents in these centrifugal neurons. The fact that FMRFamide reduced the magnitude of four of five characterized currents could suggest that this neuropeptide may act as a strong inhibitory agent on these neurons. Summary FMRFamide modulate the ionic currents in identified centrifugal neurons in the optic lobe of cuttlefish: thus, FMRFamide could play a key role in visual processing of these animals." @default.
- W3089451489 created "2020-10-08" @default.
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- W3089451489 date "2020-10-01" @default.
- W3089451489 modified "2023-10-14" @default.
- W3089451489 title "Effect of FMRFamide on voltage-dependent currents in identified centrifugal neurons of the optic lobe of the cuttlefish,<i>Sepia officinalis</i>" @default.
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- W3089451489 doi "https://doi.org/10.1101/2020.09.29.318691" @default.
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