Cited by 8Opioid Use Disorder TreatmentPain Mechanisms and TreatmentsPain Management and Opioid Use

Sensitized brain response to acute pain in patients using prescription opiates for chronic pain: a pilot study

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Dowdle, Logan T., Borckardt, Jeffrey J., Back, Sudie E., Morgan, Katherine, Adams, David, Madan, Alok, Balliet, Wendy, Hanlon, Colleen A.·2019·Drug and Alcohol Dependence

Abstract

Background Chronic opiate use leads to a sensitized behavioral response to acute pain, which in turn, leads to escalating doses of opiates. This study was designed to test the hypothesis that chronic opiate usage is also associated with a sensitized neurobiological response to acute pain in individuals that have used prescription opiates for 6 or more months.Methods Fourteen patients with non-alcoholic chronic pancreatitis that have been taking prescription opiates for 6 or more months and 14 gender matched, non-opiate using controls were enrolled. Functional neuroimaging data was acquired while participants received blocks of thermal stimulation to their wrist (individually-tailored to their pain threshold).Results Self-reported pain was significantly greater in opiate using patients (3.4 ± 3.4) than controls (0.2 ± 0.8: Brief Pain Inventory p < 0.005), however no significant difference between groups was observed in the individually-tailored pain thresholds. Opiate using patients evidenced a significantly greater response to pain than controls in two established nodes of the "Pain Matrix": somatosensory cortex (p FWE≤0.001) and anterior cingulate cortex (p ≤ 0.01). This response was positively correlated with prescribed morphine equivalent dosages (average: 133.5 ± 94.8 mg/day).Conclusion The findings suggest that in chronic pancreatitis patients, a dose of opiates that normalizes their behavioral response to acute pain is associated with an amplified neural response to acute pain. Further longitudinal studies are needed to determine if this neural sensitization hastens a behavioral tolerance to opiates or the development of an opioid use disorder.

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Crossref · 10.1016/j.drugalcdep.2019.02.024

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Authors
Dowdle, L. T., Borckardt, J. J., Back, S. E., Morgan, K., Adams, D., Madan, A., Balliet, W., & Hanlon, C. A.
Affiliations
  • Medical University of South Carolina (US)
  • Houston Methodist (US)
Corresponding author
Hanlon, Colleen A.
Venue
Drug and Alcohol Dependence
Publisher
Elsevier BV
Published
2019-07
Volume
200
Pages
6-13
ISSN
0376-8716 (ISSN-L)
OpenAlex
W2940764370
Cited by
8
References
70
Citations by year
2025: 1 · 2024: 3 · 2022: 1 · 2021: 2 · 2020: 1
FWCI
0.92
Type
journal article
Language
en
Open access
Locations
  • Drug and Alcohol Dependence (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute on Drug Abuse
Topics
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Opioid Use Disorder Treatment
  • Health Sciences › Medicine › Physiology › Pain Mechanisms and Treatments
  • Health Sciences › Medicine › Anesthesiology and Pain Medicine › Pain Management and Opioid Use
Keywords
chronic pain, acute pain, pain matrix, neural sensitization, chronic pancreatitis, somatosensory cortex, anterior cingulate cortex, morphine milligram equivalents, opioid tolerance, opioid use disorder
MeSH terms
Adult, Analgesics, Opioid, Brain, Drug Tolerance, Female, Humans, Male, Middle Aged, Morphine, Opioid-Related Disorders, Pain Measurement, Pancreatitis, Pilot Projects, Substance-Related Disorders, Chronic Pain, Acute Pain

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