Differential potassium channel gene regulation in BXD mice reveals novel targets for pharmacogenetic therapies to reduce heavy alcohol drinking

Jennifer A. Rinker, Diana B. Fulmer, Heather Trantham-Davidson, Maren L. Smith, Robert Williams, Marcelo F. Lopez, Patrick K. Randall, L. Judson Chandler, Michael F. Miles, Howard C. Becker, Patrick J. Mulholland

Research output: Contribution to journalArticle

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Abstract

Alcohol (ethanol) dependence is a chronic relapsing brain disorder partially influenced by genetics and characterized by an inability to regulate harmful levels of drinking. Emerging evidence has linked genes that encode K V 7, K IR , and K Ca 2 K + channels with variation in alcohol-related behaviors in rodents and humans. This led us to experimentally test relations between K + channel genes and escalation of drinking in a chronic-intermittent ethanol (CIE) exposure model of dependence in BXD recombinant inbred strains of mice. Transcript levels for K + channel genes in the prefrontal cortex (PFC) and nucleus accumbens (NAc) covary with voluntary ethanol drinking in a non-dependent cohort. Transcripts that encode K V 7 channels covary negatively with drinking in non-dependent BXD strains. Using a pharmacological approach to validate the genetic findings, C57BL/6J mice were allowed intermittent access to ethanol to establish baseline consumption before they were treated with retigabine, an FDA-approved K V 7 channel positive modulator. Systemic administration significantly reduced drinking, and consistent with previous evidence, retigabine was more effective at reducing voluntary consumption in high-drinking than low-drinking subjects. We evaluated the specific K + channel genes that were most sensitive to CIE exposure and identified a gene subset in the NAc and PFC that were dysregulated in the alcohol-dependent BXD cohort. CIE-induced modulation of nine genes in the NAc and six genes in the PFC covaried well with the changes in drinking induced by ethanol dependence. Here we identified novel candidate genes in the NAc and PFC that are regulated by ethanol dependence and correlate with voluntary drinking in non-dependent and dependent BXD mice. The findings that Kcnq expression correlates with drinking and that retigabine reduces consumption suggest that K V 7 channels could be pharmacogenetic targets to treat individuals with alcohol addiction.

Original languageEnglish (US)
Pages (from-to)33-45
Number of pages13
JournalAlcohol
Volume58
DOIs
StatePublished - Feb 1 2017

Fingerprint

Pharmacogenetics
Potassium Channels
Gene expression
Alcohol Drinking
Drinking
Ethanol
Genes
alcohol
Alcohols
regulation
Nucleus Accumbens
Prefrontal Cortex
escalation
Therapeutics
addiction
evidence
brain
candidacy
Alcoholism
Inbred Strains Mice

All Science Journal Classification (ASJC) codes

  • Health(social science)
  • Biochemistry
  • Toxicology
  • Neurology
  • Behavioral Neuroscience

Cite this

Differential potassium channel gene regulation in BXD mice reveals novel targets for pharmacogenetic therapies to reduce heavy alcohol drinking. / Rinker, Jennifer A.; Fulmer, Diana B.; Trantham-Davidson, Heather; Smith, Maren L.; Williams, Robert; Lopez, Marcelo F.; Randall, Patrick K.; Chandler, L. Judson; Miles, Michael F.; Becker, Howard C.; Mulholland, Patrick J.

In: Alcohol, Vol. 58, 01.02.2017, p. 33-45.

Research output: Contribution to journalArticle

Rinker, JA, Fulmer, DB, Trantham-Davidson, H, Smith, ML, Williams, R, Lopez, MF, Randall, PK, Chandler, LJ, Miles, MF, Becker, HC & Mulholland, PJ 2017, 'Differential potassium channel gene regulation in BXD mice reveals novel targets for pharmacogenetic therapies to reduce heavy alcohol drinking', Alcohol, vol. 58, pp. 33-45. https://doi.org/10.1016/j.alcohol.2016.05.007
Rinker, Jennifer A. ; Fulmer, Diana B. ; Trantham-Davidson, Heather ; Smith, Maren L. ; Williams, Robert ; Lopez, Marcelo F. ; Randall, Patrick K. ; Chandler, L. Judson ; Miles, Michael F. ; Becker, Howard C. ; Mulholland, Patrick J. / Differential potassium channel gene regulation in BXD mice reveals novel targets for pharmacogenetic therapies to reduce heavy alcohol drinking. In: Alcohol. 2017 ; Vol. 58. pp. 33-45.
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