Journal
CELL REPORTS
Volume 11, Issue 2, Pages 175-182Publisher
CELL PRESS
DOI: 10.1016/j.celrep.2015.03.026
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Funding
- Canadian Institutes of Health Research (CIHR)
- Alberta Heritage Foundation for Medical Research (AHFMR)
- T. Chen Fong award
- Killam Foundation
- CIHR-CGS PhD studentship
- Alberta Innovates-Health Solutions
- Alberta Innovates [201500187] Funding Source: researchfish
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Control over the frequency and pattern of neuronal spike discharge depends on Ca2+-gated K+ channels that reduce cell excitability by hyperpolarizing the membrane potential. The Ca2+-dependent slow afterhyperpolarization (sAHP) is one of the most prominent inhibitory responses in the brain, with sAHP amplitude linked to a host of circuit and behavioral functions, yet the channel that underlies the sAHP has defied identification for decades. Here, we show that intermediate-conductance Ca2+-dependent K+ (IKCa) channels underlie the sAHP generated by trains of synaptic input or postsynaptic stimuli in CA1 hippocampal pyramidal cells. These findings are significant in providing a molecular identity for the sAHP of central neurons that will identify pharmacological tools capable of potentially modifying the several behavioral or disease states associated with the sAHP.
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