Evidence map›Paper›PMID 29363579›Full record

ArticleThe Journal of pharmacology and experimental therapeutics2018

Repeated Morphine Produces Sensitization to Reward and Tolerance to Antiallodynia in Male and Female Rats with Chemotherapy-Induced Neuropathy.

L P Legakis, S S Negus

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of pharmacology and experimental therapeutics, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
2.7field-weighted citation impact, top 10% of its field
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

16 citing papers in PubMed, 25 citations in OpenAlex.

  1. Spinal P2XPurinergic signalling · 2026
    Article
  2. Article
  3. The Cannabidiol Analog PECS-101 Prevents Chemotherapy-Induced Neuropathic Pain via PPARγ Receptors.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2022
    Article
  4. Article
  5. Pain Relieving and Neuroprotective Effects of Non-opioid Compound, DDD-028, in the Rat Model of Paclitaxel-Induced Neuropathy.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2021
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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

2 authors at 1 institution in 1 country.

L P LegakisDepartment of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, Virginia legakisl@vcu.edu.
S S NegusDepartment of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, Virginia.
Virginia Commonwealth University · US

Funding

Neurobiology and Treatment of PainR01NS070715 · NINDS · VIRGINIA COMMONWEALTH UNIVERSITY · PI NEGUS, SIDNEY S, SELLEY, DANA E · 2009 to 2018
$3.3M
Interactions between cancer chemotherapy and opioid abuseF30CA213956 · NCI · VIRGINIA COMMONWEALTH UNIVERSITY · PI LEGAKIS, LUKE · 2017 to 2020
$135k
NCI NIH HHS F30 CA213956NINDS NIH HHS R01 NS070715
6 · The paper itself

Abstract

Paclitaxel is a cancer chemotherapy drug with adverse effects that include chemotherapy-induced neuropathic pain (CINP) as well as depression of behavior and mood. In the clinical setting, opioids are often used concurrently with or after chemotherapy to treat pain related to the cancer or CINP, but repeated opioid exposure can also increase the risk of opioid abuse. In this study, male and female Sprague-Dawley rats were used to test the hypothesis that repeated 3.2-mg/kg doses of morphine would induce tolerance to its antinociceptive effects in a mechanical sensitivity assay and increased expression of its abuse-related rewarding effects in an assay of intracranial self-stimulation (ICSS). Three weeks after four injections of vehicle or 2.0 mg/kg of paclitaxel, the initial morphine dose-effect curves were determined in both assays. Subsequently, rats were treated with 3.2 mg/kg per day morphine for 6 days. On the final day of testing, morphine dose-effect curves were redetermined in both assays. On initial exposure, morphine produced dose-dependent antiallodynia in the assay of mechanical sensitivity, but it produced little or no rewarding effects in the assay of ICSS. After 6 days of repeated treatment, morphine antiallodynia decreased, and morphine reward increased. Females exhibited greater morphine reward on initial exposure than males, but repeated morphine eliminated this sex difference. These results suggest that repeated morphine may produce tolerance to therapeutically beneficial analgesic effects of morphine but increased sensitivity to abuse-related rewarding effects of morphine in subjects treated with paclitaxel.

Indexed as

RewardAnimalsAntineoplastic AgentsFemaleHyperalgesiaMaleMorphineNeuralgiaPaclitaxelRatsRats, Sprague-DawleyTime FactorsAntineoplastic AgentsMorphinePaclitaxel

Identifiers

PMID29363579
PMCPMC5830638
OpenAlexW2790264469

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.