Prefrontal Regulation of Punished Ethanol Self-administration

Lindsay R. Halladay, Adrina Kocharian, Patrick T. Piantadosi, Michael E. Authement, Abby G. Lieberman, Nathen A. Spitz, Kendall Coden, Lucas R. Glover, Vincent D. Costa, Veronica A. Alvarez, Andrew Holmes

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Background: A clinical hallmark of alcohol use disorder is persistent drinking despite potential adverse consequences. The ventromedial prefrontal cortex (vmPFC) and dorsomedial prefrontal cortex (dmPFC) are positioned to exert top-down control over subcortical regions, such as the nucleus accumbens shell (NAcS) and basolateral amygdala, which encode positive and negative valence of ethanol (EtOH)-related stimuli. Prior rodent studies have implicated these regions in regulation of punished EtOH self-administration (EtOH-SA). Methods: We conducted in vivo electrophysiological recordings in mouse vmPFC and dmPFC to obtain neuronal correlates of footshock-punished EtOH-SA. Ex vivo recordings were performed in NAcS D1 receptor–expressing medium spiny neurons receiving vmPFC input to examine punishment-related plasticity in this pathway. Optogenetic photosilencing was employed to assess the functional contribution of the vmPFC, dmPFC, vmPFC projections to NAcS, or vmPFC projections to basolateral amygdala, to punished EtOH-SA. Results: Punishment reduced EtOH lever pressing and elicited aborted presses (lever approach followed by rapid retraction). Neurons in the vmPFC and dmPFC exhibited phasic firing to EtOH lever presses and aborts, but only in the vmPFC was there a population-level shift in coding from lever presses to aborts with punishment. Closed-loop vmPFC, but not dmPFC, photosilencing on a postpunishment probe test negated the reduction in EtOH lever presses but not in aborts. Punishment was associated with altered plasticity at vmPFC inputs to D1 receptor–expressing medium spiny neurons in the NAcS. Photosilencing vmPFC projections to the NAcS, but not to the basolateral amygdala, partially reversed suppression of EtOH lever presses on probe testing. Conclusions: These findings demonstrate a key role for the vmPFC in regulating EtOH-SA after punishment, with implications for understanding the neural basis of compulsive drinking in alcohol use disorder.

Original languageEnglish (US)
Pages (from-to)967-978
Number of pages12
JournalBiological Psychiatry
Volume87
Issue number11
DOIs
StatePublished - Jun 1 2020

Keywords

  • Alcohol
  • Amygdala
  • Compulsive
  • Corticostriatal
  • Infralimbic
  • Mouse
  • Nucleus accumbens

ASJC Scopus subject areas

  • Biological Psychiatry

Fingerprint

Dive into the research topics of 'Prefrontal Regulation of Punished Ethanol Self-administration'. Together they form a unique fingerprint.

Cite this