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- W2023871339 abstract "1. The effect of the antidepressant drug, fluoxetine on neuronal delayed rectifier (KV) potassium (K) currents was investigated using perforated-patch whole-cell electrophysiological recording methods. 2. Fluoxetine was an effective inhibitor of KV currents in cerebellar granule neurons (CGNs) and also inhibited recombinant KV1.1 channels expressed in Chinese hamster ovary (CHO) cells. 3. Fluoxetine had an IC50 of 11 microM in CGNs but was slightly less potent on KV1.1 channels (IC50=55 microM). Interestingly, fluoxetine was a much more potent inhibitor of KV1.1 expressed in mammalian cells than has been found previously for the same homomeric channel expressed in Xenopus oocytes. 4. At concentrations that produced around 50% block, the shape of the KV currents in the presence of fluoxetine was simply scaled down when compared to control currents. 5. The effect of fluoxetine on KV currents in CGNs was neither voltage-dependent nor dependent on the channels being in their open state. Both of these observations suggest that fluoxetine does not act as a simple open channel blocking agent. 6. It is concluded that block of KV currents in mammalian neurons can occur at therapeutic levels of fluoxetine. This could lead to an increase in neuronal excitability and this effect may contribute to the therapeutic antidepressant action of fluoxetine." @default.
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- W2023871339 date "1999-12-01" @default.
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- W2023871339 title "Inhibition of neuronal K<sub>V</sub> potassium currents by the antidepressant drug, fluoxetine" @default.
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- W2023871339 doi "https://doi.org/10.1038/sj.bjp.0702955" @default.
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