Synapse-specific opioid modulation of thalamo-cortico-striatal circuits

William T. Birdsong, Bart C. Jongbloets, Kim A. Engeln, Dong Wang, Grégory Scherrer, Tianyi Mao

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

The medial thalamus (MThal), anterior cingulate cortex (ACC) and striatum play important roles in affective-motivational pain processing and reward learning. Opioids affect both pain and reward through uncharacterized modulation of this circuitry. This study examined opioid actions on glutamate transmission between these brain regions in mouse. Mu-opioid receptor (MOR) agonists potently inhibited MThal inputs without affecting ACC inputs to individual striatal medium spiny neurons (MSNs). MOR activation also inhibited MThal inputs to the pyramidal neurons in the ACC. In contrast, delta-opioid receptor (DOR) agonists disinhibited ACC pyramidal neuron responses to MThal inputs by suppressing local feed-forward GABA signaling from parvalbumin-positive interneurons. As a result, DOR activation in the ACC facilitated poly-synaptic (thalamo-cortico-striatal) excitation of MSNs by MThal inputs. These results suggest that opioid effects on pain and reward may be shaped by the relative selectivity of opioid drugs to the specific circuit components.

Original languageEnglish (US)
Article numbere45146
JournaleLife
Volume8
DOIs
StatePublished - May 2019

ASJC Scopus subject areas

  • Neuroscience(all)
  • Immunology and Microbiology(all)
  • Biochemistry, Genetics and Molecular Biology(all)

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    Birdsong, W. T., Jongbloets, B. C., Engeln, K. A., Wang, D., Scherrer, G., & Mao, T. (2019). Synapse-specific opioid modulation of thalamo-cortico-striatal circuits. eLife, 8, [e45146]. https://doi.org/10.7554/eLife.45146