Evidence map›Paper›PMID 30611904›Full record

ArticleOsteoarthritis and cartilage2019

Characterisation of peripheral and central components of the rat monoiodoacetate model of Osteoarthritis.

S M Lockwood, D M Lopes, S B McMahon, A H Dickenson

Open access · hybridAbstract read
In one paragraph

Article in Osteoarthritis and cartilage, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 1 pooled it
3.0field-weighted citation impact, top 8% 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

18 citing papers in PubMed, 1 synthesis or guideline pooled it, 34 citations in OpenAlex.

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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

4 authors at 3 institutions in 1 country.

S M LockwoodDepartment of Neuroscience, Physiology and Pharmacology, University College London, London, United Kingdom. Electronic address: stevie.lockwood.14@ucl.ac.uk.
D M LopesWolfson CARD, Hodgkin Building, Kings College London, London, United Kingdom.
S B McMahonWolfson CARD, Hodgkin Building, Kings College London, London, United Kingdom.
A H DickensonDepartment of Neuroscience, Physiology and Pharmacology, University College London, London, United Kingdom.
King's College London · GBThe London College · GBUniversity College London · GB

Funding

Wellcome Trust 102645
6 · The paper itself

Abstract

objectivePain is the main reason patients report Osteoarthritis (OA), yet current analgesics remain relatively ineffective. This study investigated both peripheral and central mechanisms that lead to the development of OA associated chronic pain.

designThe monoiodoacetate (MIA) model of OA was investigated at early (2-6 days post injection) and late (>14 days post injection) time points. Pain-like behaviour and knee histology were assessed to understand the extent of pain due to cartilage degradation. Electrophysiological single-unit recordings were taken from spinal wide dynamic range (WDR) neurons to investigate Diffuse Noxious Inhibitory Controls (DNIC) as a marker of potential changes in descending controls. Immunohistochemistry was performed on dorsal root ganglion (DRG) neurons to assess any MIA induced neuronal damage. Furthermore, qPCR was used to measure levels of glia cells and cytokines in the dorsal horn.

resultsBoth MIA groups develop pain-like behaviour but only late phase (LP) animals display extensive cartilage degradation. Early phase animals have a normally functioning DNIC system but there is a loss of DNIC in LP animals. We found no evidence for neuronal damage caused by MIA in either group, yet an increase in IL-1β mRNA in the dorsal horn of LP animals.

conclusionThe loss of DNIC in LP MIA animals suggests an imbalance in inhibitory and facilitatory descending controls, and a rise in the mRNA expression of IL-1β mRNA suggest the development of central sensitisation. Therefore, the pain associated with OA in LP animals may not be attributed to purely peripheral mechanisms.

Indexed as

AnimalsArthralgiaCartilage, ArticularDisease Models, AnimalGanglia, SpinalImmunohistochemistryInterleukin-1betaIodoacetic AcidKnee JointMaleOsteoarthritis, KneeRatsRats, Sprague-DawleyIL1B protein, ratInterleukin-1betaIodoacetic AcidDescending controlsDiffuse noxious inhibitory controlsMIA model

Identifiers

PMID30611904
PMCPMC6444078
OpenAlexW2906762005

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LicenceCC BY
Read underepoch 390

Registered trials

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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.