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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Block of rat brain recombinant SK channels by tricyclic antidepressants and related compounds.

SK channels are small conductance, Ca(2+)-activated K(+) channels that underlie neuronal slow afterhyperpolarization and mediate spike frequency adaptation. Using the patch clamp technique, we tested the effects of eight clinically relevant psychoactive compounds structurally related to the tricyclic antidepressants, on SK2 subtype channels cloned from rat brain and functionally expressed in the human embryonic kidney cell line, HEK293. Amitriptyline, carbamazepine, chlorpromazine, cyproheptadine, imipramine, tacrine and trifluperazine blocked SK2 channel currents with micromolar affinity. The block was reversible and concentration-dependent. The potency differed according to chemical structure. In contrast, the cognitive enhancer linopirdine was ineffective at blocking these channels. Our results point to a distinct pharmacological profile for SK channels.[1]

References

  1. Block of rat brain recombinant SK channels by tricyclic antidepressants and related compounds. Dreixler, J.C., Bian, J., Cao, Y., Roberts, M.T., Roizen, J.D., Houamed, K.M. Eur. J. Pharmacol. (2000) [Pubmed]
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