Evidence map›Paper›PMID 32379221›Full record

ArticlePain2020

Imbalance of proresolving lipid mediators in persistent allodynia dissociated from signs of clinical arthritis.

Benjamin L Allen, Karli Montague-Cardoso, Raffaele Simeoli, Romain A Colas, Silvia Oggero, Bruno Vilar, Peter A McNaughton, Jesmond Dalli, Mauro Perretti, Emanuele Sher and 1 more

Erratum issuedOpen access · hybridAbstract read
In one paragraph

Article in Pain, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 29 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 2 pooled it
4.8field-weighted citation impact, top 5% 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

29 citing papers in PubMed, 2 syntheses or guidelines pooled it, 49 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. TRPM2 is a direct pain transducer.Proceedings of the National Academy of Sciences of the United States of America · 2026
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  9. Activation of proresolving macrophages in dorsal root ganglia attenuates persistent arthritis pain.Proceedings of the National Academy of Sciences of the United States of America · 2025
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  19. Inflammation and Infection in Pain and the Role of GPR37.International journal of molecular sciences · 2022
    Review
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

11 authors at 4 institutions in 2 countries.

Benjamin L AllenWolfson Centre for Age Related Diseases, King's College London, London, United Kingdom.
Karli Montague-CardosoWolfson Centre for Age Related Diseases, King's College London, London, United Kingdom.
Raffaele SimeoliWolfson Centre for Age Related Diseases, King's College London, London, United Kingdom.
Romain A ColasBarts and The London School of Medicine, The William Harvey Research Institute, Queen Mary University of London, London, United Kingdom.
Silvia OggeroBarts and The London School of Medicine, The William Harvey Research Institute, Queen Mary University of London, London, United Kingdom.
Bruno VilarWolfson Centre for Age Related Diseases, King's College London, London, United Kingdom.
Peter A McNaughtonWolfson Centre for Age Related Diseases, King's College London, London, United Kingdom.
Jesmond DalliBarts and The London School of Medicine, The William Harvey Research Institute, Queen Mary University of London, London, United Kingdom.
Mauro PerrettiBarts and The London School of Medicine, The William Harvey Research Institute, Queen Mary University of London, London, United Kingdom.
Emanuele SherNeuroscience Discovery, Lilly Research Centre, Eli Lilly and Company Ltd, Surrey, United Kingdom.
Marzia MalcangioWolfson Centre for Age Related Diseases, King's College London, London, United Kingdom.
King's College London · GBQueen Mary University of London · GBWilliam Harvey Research Institute · GBEli Lilly (United Kingdom) · GB

Funding

Medical Research Council MR/J013129/1Medical Research Council MR/J013129/2Versus Arthritis 21961
6 · The paper itself

Abstract

abstractRheumatoid arthritis-associated pain is poorly managed, often persisting when joint inflammation is pharmacologically controlled. Comparably, in the mouse K/BxN serum-transfer model of inflammatory arthritis, hind paw nociceptive hypersensitivity occurs with ankle joint swelling (5 days after immunisation) persisting after swelling has resolved (25 days after immunisation). In this study, lipid mediator (LM) profiling of lumbar dorsal root ganglia (DRG), the site of sensory neuron cell bodies innervating the ankle joints, 5 days and 25 days after serum transfer demonstrated a shift in specialised proresolving LM profiles. Persistent nociception without joint swelling was associated with low concentrations of the specialised proresolving LM Maresin 1 (MaR1) and high macrophage numbers in DRG. MaR1 application to cultured DRG neurons inhibited both capsaicin-induced increase of intracellular calcium ions and release of calcitonin gene-related peptide in a dose-dependent manner. Furthermore, in peritoneal macrophages challenged with lipopolysaccharide, MaR1 reduced proinflammatory cytokine expression. Systemic MaR1 administration caused sustained reversal of nociceptive hypersensitivity and reduced inflammatory macrophage numbers in DRG. Unlike gabapentin, which was used as positive control, systemic MaR1 did not display acute antihyperalgesic action. Therefore, these data suggest that MaR1 effects observed after K/BxN serum transfer relate to modulation of macrophage recruitment, more likely than to direct actions on sensory neurons. Our study highlights that, in DRG, aberrant proresolution mechanisms play a key role in arthritis joint pain dissociated from joint swelling, opening novel approaches for rheumatoid arthritis pain treatment.

Indexed as

Ganglia, SpinalHyperalgesiaAnimalsCalcitonin Gene-Related PeptideMacrophagesMicePainCalcitonin Gene-Related Peptide

Identifiers

PMID32379221
PMCPMC7431142
OpenAlexW3021490403

What OpenQuestion holds

Textmetadata
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.