Evidence map›Paper›PMID 33316293›Full record

ArticlePharmacology, biochemistry, and behavior2021

Divergent profiles of fentanyl withdrawal and associated pain in mice and rats.

Olivia Uddin, Carleigh Jenne, Megan E Fox, Keiko Arakawa, Asaf Keller, Nathan Cramer

Abstract read
In one paragraph

Article in Pharmacology, biochemistry, and behavior, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

24 citing papers in PubMed.

  1. A widespread internal brain state for fentanyl withdrawal.bioRxiv : the preprint server for biology · 2026
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  6. Review
  7. Benefits ofInternational journal of molecular sciences · 2025
    Article
  8. Article
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  10. Ceftriaxone and MC-100093 mitigate fentanyl-induced cardiac injury in mice: Preclinical investigation of its underlying molecular mechanisms.Saudi pharmaceutical journal : SPJ : the official publication of the Saudi Pharmaceutical Society · 2024
    Article
  11. Article
  12. Article
  13. Nalbuphine Potentiates Reversal of Fentanyl Overdose by Naloxone.Pharmaceuticals (Basel, Switzerland) · 2024
    Article
  14. Article
  15. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Olivia UddinDepartment of Anatomy and Neurobiology, Program in Neuroscience, University of Maryland School of Medicine, 20 Penn Street, Baltimore, MD 21201, United States of America.
Carleigh JenneDepartment of Anatomy and Neurobiology, Program in Neuroscience, University of Maryland School of Medicine, 20 Penn Street, Baltimore, MD 21201, United States of America.
Megan E FoxDepartment of Anatomy and Neurobiology, Program in Neuroscience, University of Maryland School of Medicine, 20 Penn Street, Baltimore, MD 21201, United States of America.
Keiko ArakawaDepartment of Anatomy and Neurobiology, Program in Neuroscience, University of Maryland School of Medicine, 20 Penn Street, Baltimore, MD 21201, United States of America.
Asaf KellerDepartment of Anatomy and Neurobiology, Program in Neuroscience, University of Maryland School of Medicine, 20 Penn Street, Baltimore, MD 21201, United States of America.
Nathan CramerDepartment of Anatomy and Neurobiology, Program in Neuroscience, University of Maryland School of Medicine, 20 Penn Street, Baltimore, MD 21201, United States of America. Electronic address: ncramer@som.umaryland.edu.

Funding

Parabrachial role in chronic painR01NS099245 · NINDS · UNIVERSITY OF MARYLAND BALTIMORE · PI KELLER, ASAF, MASRI, RADI · 2017 to 2021
$2.2M
Circuit-specific molecular mechanisms in fentanyl use and relapseK99DA050575 · NIDA · UNIVERSITY OF MARYLAND BALTIMORE · PI FOX, MEGAN ELIZABETH · 2020 to 2021
$352k
NIDA NIH HHS K99 DA050575NINDS NIH HHS R01 NS099245
6 · The paper itself

Abstract

Opioid abuse has devastating effects on patients, their families, and society. Withdrawal symptoms are severely unpleasant, prolonged, and frequently hinder recovery or lead to relapse. The sharp increase in abuse and overdoses arising from the illicit use of potent and rapidly-acting synthetic opioids, such as fentanyl, highlights the urgency of understanding the withdrawal mechanisms related to these drugs. Progress is impeded by inconsistent reports on opioid withdrawal in different preclinical models. Here, using rats and mice of both sexes, we quantified withdrawal behaviors during spontaneous and naloxone-precipitated withdrawal, following two weeks of intermittent fentanyl exposure. We found that both mice and rats lost weight during exposure and showed increased signs of distress during spontaneous and naloxone precipitated withdrawal. However, these species differed in their expression of withdrawal associated pain, a key contributor to relapse in humans. Spontaneous or ongoing pain was preferentially expressed in rats in both withdrawal conditions, while no change was observed in mice. In contrast, withdrawal associated thermal hyperalgesia was found only in mice. These data suggest that rats and mice diverge in how they experience withdrawal and which aspects of the human condition they most accurately model. These differences highlight each species' strengths as model systems and can inform experimental design in studies of opioid withdrawal.

Indexed as

Analgesics, OpioidAnimalsBehavior, AnimalFemaleFentanylHumansHyperalgesiaLocomotionMaleMiceMice, Inbred C57BLNaloxoneNarcotic AntagonistsNarcoticsPainRatsAnalgesics, OpioidFentanylNaloxoneNarcotic AntagonistsNarcotics

Identifiers

PMID33316293
PMCPMC8065268

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.