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    1. Cell Biology
    2. Neuroscience

    The orphan receptor GPR88 blunts the signaling of opioid receptors and multiple striatal GPCRs

    Thibaut Laboute et al.
    GPR88 inhibits G-protein signaling of nearby GPCRs, and dampens b-arrestin recruitment by all GPCRs tested, likely by sequestration in intracellular compartments.
    1. Neuroscience

    Endogenous opioids in the nucleus accumbens promote approach to high-fat food in the absence of caloric need

    Kevin Caref, Saleem M Nicola
    Activation of mu-opioid receptors in the nucleus accumbens by their endogenous ligands promotes consumption of high-fat food in sated but not hungry rats, via enhancement of a neural signal that promotes cued approach behavior.
    1. Neuroscience

    Cellular tolerance at the µ-opioid receptor is phosphorylation dependent

    Seksiri Arttamangkul et al.
    The role of C-terminal phosphorylation is critical for the expression of acute desensitization, trafficking and long-term tolerance to morphine.
    1. Neuroscience

    Different neuronal populations mediate inflammatory pain analgesia by exogenous and endogenous opioids

    Xin-Yan Zhang et al.
    Exogenous opioid analgesia is mediated by MORs expressed in glutamatergic neurons, whereas endogenous opioid analgesia is mediated by MORs expressed in GABAergic neurons.
    1. Neuroscience

    Dopamine and opioid systems interact within the nucleus accumbens to maintain monogamous pair bonds

    Shanna L Resendez et al.
    The neural mechanisms that underlie the maintenance of social bonds between prairie voles suggest that social support networks may be a powerful way of treating addiction.
    1. Neuroscience

    Opioids depress breathing through two small brainstem sites

    Iris Bachmutsky et al.
    Opioids stop breathing during overdose by silencing two small brain sites, with just 140 neurons in the breathing rhythm generator exerting the key effect.
    1. Genetics and Genomics
    2. Neuroscience

    Taar1 gene variants have a causal role in methamphetamine intake and response and interact with Oprm1

    Alexandra M Stafford et al.
    The trace amine-associated receptor 1 gene has a causal role in methamphetamine intake and thermal response, and interacts with the mu-opioid receptor gene in its methamphetamine addiction-related effects.
    1. Neuroscience

    ß-arrestin 2 germline knockout does not attenuate opioid respiratory depression

    Iris Bachmutsky et al.
    The key mechanism for opioid-like biased agonists to provide analgesia but not respiratory depression does not involve ß-arrestin 2.
    1. Neuroscience

    Dopaminergic and opioidergic regulation during anticipation and consumption of social and nonsocial rewards

    Sebastian Korb et al.
    Administration of dopamine and opioid receptor antagonists resulted in reduced reward anticipation (effort and increased negative facial reactions), but only administration of opioid antagonists resulted in reduced liking (facial reactions).
    1. Neuroscience

    Left-right side-specific endocrine signaling complements neural pathways to mediate acute asymmetric effects of brain injury

    Nikolay Lukoyanov et al.
    In addition to the well-established involvement of descending neural tracts, the left-right side-specific endocrine mechanism may contribute to signaling from injured brain to spinal motor circuits.