Sizing up ethanol-induced plasticity

The role of small and large conductance calcium-activated potassium channels

Patrick J. Mulholland, F. Woodward Hopf, Anna Bukiya, Gilles E. Martin, Jianxi Liu, Alejandro Dopico, Antonello Bonci, Steven N. Treistman, L. Judson Chandler

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Small (SK) and large conductance (BK) Ca 2+-activated K + channels contribute to action potential repolarization, shape dendritic Ca 2+spikes and postsynaptic responses, modulate the release of hormones and neurotransmitters, and contribute to hippocampal-dependent synaptic plasticity. Over the last decade, SK and BK channels have emerged as important targets for the development of acute ethanol tolerance and for altering neuronal excitability following chronic ethanol consumption. In this mini-review, we discuss new evidence implicating SK and BK channels in ethanol tolerance and ethanol-associated homeostatic plasticity. Findings from recent reports demonstrate that chronic ethanol produces a reduction in the function of SK channels in VTA dopaminergic and CA1 pyramidal neurons. It is hypothesized that the reduction in SK channel function increases the propensity for burst firing in VTA neurons and increases the likelihood for aberrant hyperexcitability during ethanol withdrawal in hippocampus. There is also increasing evidence supporting the idea that ethanol sensitivity of native BK channel results from differences in BK subunit composition, the proteolipid microenvironment, and molecular determinants of the channel-forming subunit itself. Moreover, these molecular entities play a substantial role in controlling the temporal component of ethanol-associated neuroadaptations in BK channels. Taken together, these studies suggest that SK and BK channels contribute to ethanol tolerance and adaptive plasticity.

Original languageEnglish (US)
Pages (from-to)1125-1135
Number of pages11
JournalAlcoholism: Clinical and Experimental Research
Volume33
Issue number7
DOIs
StatePublished - Jul 1 2009

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Small-Conductance Calcium-Activated Potassium Channels
Large-Conductance Calcium-Activated Potassium Channels
Plasticity
Ethanol
Neurons
Proteolipids
Neuronal Plasticity
Pyramidal Cells
Action Potentials
Neurotransmitter Agents
Hippocampus

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Toxicology
  • Psychiatry and Mental health

Cite this

Sizing up ethanol-induced plasticity : The role of small and large conductance calcium-activated potassium channels. / Mulholland, Patrick J.; Hopf, F. Woodward; Bukiya, Anna; Martin, Gilles E.; Liu, Jianxi; Dopico, Alejandro; Bonci, Antonello; Treistman, Steven N.; Chandler, L. Judson.

In: Alcoholism: Clinical and Experimental Research, Vol. 33, No. 7, 01.07.2009, p. 1125-1135.

Research output: Contribution to journalArticle

Mulholland, Patrick J. ; Hopf, F. Woodward ; Bukiya, Anna ; Martin, Gilles E. ; Liu, Jianxi ; Dopico, Alejandro ; Bonci, Antonello ; Treistman, Steven N. ; Chandler, L. Judson. / Sizing up ethanol-induced plasticity : The role of small and large conductance calcium-activated potassium channels. In: Alcoholism: Clinical and Experimental Research. 2009 ; Vol. 33, No. 7. pp. 1125-1135.
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