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- W2094897601 abstract "Neurotensin (3–13 μM) depolarized the membrane and increased the firing discharge of dopaminergic cells in slices of the rat mesencephalon. Under voltage-clamp, at holding potentials from −50 to −60 mV (near the resting membrane potential), neurotensin produced a sustained inward shift in the holding current. This inward current was reduced with the hyperpolarization of the membrane to −125 mV. It was resistant to tetrodotoxin, but it was diminished following the perfusion with low sodium (choline chloride substitution) solution. It persisted in low calcium (1–5 mM). Changes in the intracellular concentration of chloride did not affect neurotensin-induced current. The neurotensin-induced inward current did not reverse at hyperpolarized potentials in 10.5 mM extracellular K+. It was also seen in the presence of the potassium channel blockers tetraethylammonium (10–20 mM), barium (1 mM), apamine (1 μM) and 4-aminopyridine (1–5 mM). Also the extracellular application of cesium (1–5 mM) had no effect on the cellular responsiveness to neurotensin. The action of neurotensin appears to be mediated, at least partially, by a TTX-insensitive but voltage-dependent inward current carried by sodium. The non-dopaminergic cells of the substantia nigra and ventral tegmental area were not affected by neurotensin." @default.
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- W2094897601 date "1993-04-01" @default.
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- W2094897601 title "Neurotensin induces an inward current in rat mesencephalic dopaminergic neurons" @default.
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- W2094897601 doi "https://doi.org/10.1016/0304-3940(93)90320-k" @default.
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