2017
DOI: 10.1016/j.neuron.2016.12.005
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Pathway- and Cell-Specific Kappa-Opioid Receptor Modulation of Excitation-Inhibition Balance Differentially Gates D1 and D2 Accumbens Neuron Activity

Abstract: Endogenous dynorphin signaling via the kappa-opioid receptor (KOR) in the nucleus accumbens (NAcc) powerfully mediates negative affective states and stress reactivity. Excitatory inputs from the hippocampus and amygdala play a fundamental role in shaping the activity of both NAcc D1 and D2 MSNs, which encode positive and negative motivational valences, respectively. However, a circuit-based mechanism by which KOR modulation of excitation-inhibition balance modifies D1 and D2 MSN activity is lacking. Here, we p… Show more

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Cited by 137 publications
(172 citation statements)
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“…Expression levels of opioid peptide genes prodynorphin ( Pdyn ) and preproenkephalin ( Penk ) are considered to reflect activity level of D1‐ and D2‐MSNs, respectively . We studied if Hdc KO mice have abnormal striatal mRNA levels of Pdyn and Penk following open field test.…”
Section: Resultsmentioning
confidence: 99%
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“…Expression levels of opioid peptide genes prodynorphin ( Pdyn ) and preproenkephalin ( Penk ) are considered to reflect activity level of D1‐ and D2‐MSNs, respectively . We studied if Hdc KO mice have abnormal striatal mRNA levels of Pdyn and Penk following open field test.…”
Section: Resultsmentioning
confidence: 99%
“…Regulation of dynorphin and enkephalin gene expression by dopamine was shown in animals with lesioned nigrostriatal pathway and in pharmacological experiments with dopamine receptors antagonist/agonists . Dynorphin binds preferentially to kappa‐opioid receptors, which in turn regulates dopamine release, gates excitatory/inhibitory inputs to MSN and MSN activity itself …”
Section: Discussionmentioning
confidence: 99%
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