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Chronic Back Pain Is Associated with Alterations in Dopamine Neurotransmission in the Ventral Striatum

Overview
Journal J Neurosci
Specialty Neurology
Date 2015 Jul 10
PMID 26156996
Citations 85
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Abstract

Significance Statement: The neural systems that underlie chronic pain remain poorly understood. Here, using PET, we provide insight into the molecular mechanisms that regulate sensory and affective dimensions of pain in chronic back pain patients. We found that patients with back pain have alterations in brain dopamine function that are associated with measures of pain sensitivity and affective state, but also with brain endogenous opioid system functional measures. These findings suggest that brain dopamine-opioid interactions are involved in the pathophysiology of chronic pain, which has potential therapeutic implications. Our results may also help to explain individual variation in susceptibility to opioid medication misuse and eventual addiction in the context of chronic pain.

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