Evidence map›Paper›PMID 34104835›Full record

ArticlePain reports

Mast cell stabilizer ketotifen fumarate reverses inflammatory but not neuropathic-induced mechanical pain in mice.

Carolina B Meloto, Pablo Ingelmo, Eduardo Vega Perez, Rebecca Pitt, Víctor Hugo González Cárdenas, Nada Mohamed, Susana G Sotocinal, Valerie Bourassa, Lucas Vasconcelos Lima, Alfredo Ribeiro-da-Silva and 2 more

Open access · goldAbstract read
In one paragraph

Article in Pain reports. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
1.3field-weighted citation impact, top 20% 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

10 citing papers in PubMed, 15 citations in OpenAlex.

  1. Trial
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  3. Article
  4. Rutin: a pain-relieving flavonoid.Inflammopharmacology · 2025
    Review
  5. 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

12 authors at 3 institutions in 3 countries.

Carolina B MelotoFaculty of Dentistry, McGill University, 2001 McGill College Avenue, Montreal, QC, H3A 1G1, Canada.
Pablo IngelmoAlan Edwards Centre for Research on Pain, McGill University, Montreal, QC, Canada.
Eduardo Vega PerezEdwards Family Interdisciplinary Complex Pain Center, Montreal Children's Hospital, Montreal, QC, Canada.
Rebecca PittEdwards Family Interdisciplinary Complex Pain Center, Montreal Children's Hospital, Montreal, QC, Canada.
Víctor Hugo González CárdenasEdwards Family Interdisciplinary Complex Pain Center, Montreal Children's Hospital, Montreal, QC, Canada.
Nada MohamedEdwards Family Interdisciplinary Complex Pain Center, Montreal Children's Hospital, Montreal, QC, Canada.
Susana G SotocinalDepartment of Psychology, McGill University, Montreal, QC, Canada.
Valerie BourassaDepartment of Pharmacology & Therapeutics, Faculty of Medicine and Health Sciences, McGill University, Montreal, QC, Canada.
Lucas Vasconcelos LimaDepartment of Psychology, McGill University, Montreal, QC, Canada.
Alfredo Ribeiro-da-SilvaAlan Edwards Centre for Research on Pain, McGill University, Montreal, QC, Canada.
Jeffrey S MogilAlan Edwards Centre for Research on Pain, McGill University, Montreal, QC, Canada.
Luda DiatchenkoFaculty of Dentistry, McGill University, 2001 McGill College Avenue, Montreal, QC, H3A 1G1, Canada.
McGill University · CAMontreal Children's Hospital · CAUniversité de Montréal · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionMast cell (MC) activation could establish a positive feedback loop that perpetuates inflammation and maintains pain. Stabilizing MCs with ketotifen fumarate (KF) may disrupt this loop and relieve pain.

objectiveWe aimed to test the effect of treatment with KF in pain assays in mice and in a case series of patients with chronic widespread pain.

methodsThe analgesic effect of KF was tested in CD-1 mice injected with formalin, complete Freund's adjuvant, or subjected to spared nerve injury. In addition, wild-type (C57BL/6) and MC-deficient (C57BL/6-

resultsIn the mouse experiments, KF produced dose- and MC-dependent analgesic effects against mechanical allodynia in the acute and chronic inflammatory pain but not neuropathic pain assays. In the patient case series, 4 patients reported that activity limitations, symptoms, emotions, and overall quality of life related to their pain condition were "better" or "a great deal better" since beginning treatment with KF. This was accompanied by improvements in pain comorbid symptoms.

conclusionTreatment with KF is capable of reducing established inflammatory-induced mechanical nociception in an MC-dependent manner in mice, and it may be beneficial for the treatment of chronic pain conditions.

Indexed as

Chronic widespread painInflammatory painKetotifen fumarateMast cellsMechanical allodynia

Identifiers

PMID34104835
PMCPMC8177879
OpenAlexW3172536885

What OpenQuestion holds

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LicenceCC BY
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.