2001
DOI: 10.1126/science.1060952
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Regional Mu Opioid Receptor Regulation of Sensory and Affective Dimensions of Pain

Abstract: The endogenous opioid system is involved in stress responses, in the regulation of the experience of pain, and in the action of analgesic opiate drugs. We examined the function of the opioid system and mu-opioid receptors in the brains of healthy human subjects undergoing sustained pain. Sustained pain induced the regional release of endogenous opioids interacting with mu-opioid receptors in a number of cortical and subcortical brain regions. The activation of the mu-opioid receptor system was associated with … Show more

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Cited by 759 publications
(630 citation statements)
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“…In particular, opioid release in cortical regions involved in emotional processing appears to suppress the emotive element of pain (Zubieta et al, 2001) and affective states such as sadness (Zubieta et al, 2003), whereas blocking µ-opioid receptors with naloxone increases activity in these regions (Borras et al, 2004). Thus, activation of the endogenous opioid system during psychological stress could suppress the affective and sensory components of pain independently.…”
Section: Introductionmentioning
confidence: 99%
“…In particular, opioid release in cortical regions involved in emotional processing appears to suppress the emotive element of pain (Zubieta et al, 2001) and affective states such as sadness (Zubieta et al, 2003), whereas blocking µ-opioid receptors with naloxone increases activity in these regions (Borras et al, 2004). Thus, activation of the endogenous opioid system during psychological stress could suppress the affective and sensory components of pain independently.…”
Section: Introductionmentioning
confidence: 99%
“…This physical and emotional stress activates endogenous opioid neurotransmission in regions of the brain that regulate pain, stress and emotion 20,21 . Endogenous opioid release suppresses pain, stress and anxiety-like responses in animal models 22,23 and humans 21 . The behavioural effects of NPY are mediated, at least in part, through interactions with the endogenous opioid system 24,25 .…”
mentioning
confidence: 99%
“…[ 11 C]Carfentanil is a selective mu opioid receptor radiotracer (Titeler et al, 1989) which labels mu opioid receptors in both proopiomelanocortin (POMC)/beta endorphin pathways (hypothalamus, nucleus accumbens, medial thalamus), as well as in enkephalinergic pathways (striatopallidal pathway). It is sensitive to changes in endogenous opioid activity (Bencherif et al, 2002;Zubieta et al, 2001Zubieta et al, , 2002Zubieta et al, , 2003a. Therefore, by using positron emission tomography and the radiotracer [ 11 C]carfentanil, labeling mu opioid receptor, Scott et al (2007) in a pilot study examined changes in mu opioid receptor mediated neurotransmission from smoking low (denicotinized) to average nicotine content cigarettes.…”
Section: Direct Involvement Of the Endogenous Opioid System In The Acmentioning
confidence: 99%
“…These are brain areas implicated in the anticipation of reward (Kilts, 2001). In addition, they distinguish between potentially rewarding and nonrewarding outcomes (Knutson et al, 2003), affective modulation, and antinociceptive effects (Rainville et al, 1997;Zubieta et al, 2001). …”
Section: Direct Involvement Of the Endogenous Opioid System In The Acmentioning
confidence: 99%