Evidence map›Paper›PMID 32145665›Full record

ArticleDrug and alcohol dependence2020

Mitragynine, bioactive alkaloid of kratom, reduces chemotherapy-induced neuropathic pain in rats through α-adrenoceptor mechanism.

Jeffery D Foss, Sunil U Nayak, Christopher S Tallarida, Daniel J Farkas, Sara J Ward, Scott M Rawls

Open access · greenAbstract read
In one paragraph

Article in Drug and alcohol dependence, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 2 pooled it
5.7field-weighted citation impact, top 4% 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

21 citing papers in PubMed, 2 syntheses or guidelines pooled it, 50 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Review
  4. Atypical respiration patterns of kratom alkaloids.The Journal of pharmacology and experimental therapeutics · 2026
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  12. Clinical Implications of Kratom (Current addiction reports · 2023
    Review
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  14. Interactive Effects ofThe Journal of pharmacology and experimental therapeutics · 2022
    Article
  15. [Kratom - a short review for pain medicine].Schmerz (Berlin, Germany) · 2022
    Review
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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 at 2 institutions in 1 country.

Jeffery D FossCenter for Substance Abuse Research, Lewis Katz School of Medicine, Temple University, 3500 North Broad Street, Philadelphia, PA 19140, USA.
Sunil U NayakCenter for Substance Abuse Research, Lewis Katz School of Medicine, Temple University, 3500 North Broad Street, Philadelphia, PA 19140, USA.
Christopher S TallaridaDepartment of Cell Biology & Neuroscience, School of Osteopathic Medicine, Rowan University, 42 East Laurel Road, Stratford, NJ 08084, USA.
Daniel J FarkasCenter for Substance Abuse Research, Lewis Katz School of Medicine, Temple University, 3500 North Broad Street, Philadelphia, PA 19140, USA.
Sara J WardCenter for Substance Abuse Research, Lewis Katz School of Medicine, Temple University, 3500 North Broad Street, Philadelphia, PA 19140, USA; Department of Pharmacology, Lewis Katz School of Medicine, Temple University, 3500 North Broad Street, Philadelphia, PA 19140, USA.
Scott M RawlsCenter for Substance Abuse Research, Lewis Katz School of Medicine, Temple University, 3500 North Broad Street, Philadelphia, PA 19140, USA; Department of Pharmacology, Lewis Katz School of Medicine, Temple University, 3500 North Broad Street, Philadelphia, PA 19140, USA. Electronic address: scott.rawls@temple.edu.
Temple University · USRowan University · US

Funding

Pilot Projects Core (PPC)P30DA013429 · NIDA · TEMPLE UNIV OF THE COMMONWEALTH · PI Munir Gunes Kutlu · 2000 to 2026
$34.6M
TRAINING PROGRAM: DRUGS OF ABUSE RELATED NEUROPEPTIDEST32DA007237 · NIDA · TEMPLE UNIV OF THE COMMONWEALTH · PI ELLEN M UNTERWALD · 1988 to 2026
$10.6M
Therapeutic secrets of kratom alkaloid mitragynine: Testing efficacy in preclinical neuropathic pain and abuse liability models and characterization of underlying opioid and adrenergic mechanismsR21AT010404 · NCCIH · TEMPLE UNIV OF THE COMMONWEALTH · PI RAWLS, SCOTT M. · 2019 to 2020
$436k
NCCIH NIH HHS R21 AT010404NIDA NIH HHS P30 DA013429NIDA NIH HHS T32 DA007237
6 · The paper itself

Abstract

background and purposeKratom is a coffee-like plant containing compounds that cause opioid and stimulant effects. The most prevalent bioactive alkaloid of kratom is mitragynine (MG). Opioid effects of MG are apparent (e.g. antinociception and nanomolar affinity for μ, κ and δ opioid receptors), but effects encompassing interactions with additional systems, such as adrenergic and dopaminergic, remain undefined. Given that enhanced adrenergic transmission is a mechanism common to most first-line neuropathic pain medications, we tested the hypothesis that MG reduces chemotherapy-induced neuropathic pain through a mechanism involving α-adrenoceptor activation.

methodsRats were injected once with oxaliplatin (6 mg/kg IP) to induce allodynia and then treated with MG (0, 1, 5, 10 mg/kg IP) for 5-7 days. To investigate receptor mechanisms, a fixed dose of MG (5 mg/kg IP) was injected with yohimbine (5 mg/kg IP, α KEY

resultsMG (5, 10 mg/kg) dose-dependently reduced mechanical sensitivity in oxaliplatin-injected rats. Anti-allodynic effects of MG were completely inhibited by yohimbine, and significantly reduced by prazosin and naltrexone. MG produced modest hyperlocomotion but only at a dose (30 mg/kg) higher than those required to reduce allodynia. CONCLUSION AND IMPLICATION: The finding that MG reduced neuropathic pain through a mechanism requiring active α-adrenoceptors indicates that the pharmacological profile of MG includes activation of adrenergic, as well as opioid, systems.

Indexed as

MitragynaAdrenergic alpha-2 Receptor AntagonistsAnimalsAntineoplastic AgentsDose-Response Relationship, DrugMaleNaltrexoneNarcotic AntagonistsNeuralgiaOxaliplatinRatsRats, Sprague-DawleyReceptors, Adrenergic, alpha-2Secologanin Tryptamine AlkaloidsYohimbineAdrenergic alpha-2 Receptor AntagonistsAntineoplastic AgentsmitragynineNaltrexoneNarcotic AntagonistsOxaliplatinReceptors, Adrenergic, alpha-2Secologanin Tryptamine AlkaloidsYohimbineAdrenergicAdrenoceptorKratomMitragynineNeuropathic painOpioidOxaliplatin

Identifiers

PMID32145665
PMCPMC7127966
OpenAlexW3008984193

What OpenQuestion holds

Textmetadata
LicenceTDM
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.