Evidence map›Paper›PMID 23723320›Full record

ArticleAnnals of the rheumatic diseases2014

Osteoprotegerin reduces the development of pain behaviour and joint pathology in a model of osteoarthritis.

Devi Rani Sagar, Sadaf Ashraf, Luting Xu, James J Burston, Matthew R Menhinick, Caroline L Poulter, Andrew J Bennett, David A Walsh, Victoria Chapman

Open access · hybridAbstract read
In one paragraph

Article in Annals of the rheumatic diseases, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 50 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
50citing papers in PubMed, 1 pooled it
4.6field-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

50 citing papers in PubMed, 1 synthesis or guideline pooled it, 91 citations in OpenAlex.

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  18. Molecular Classification of Knee Osteoarthritis.Frontiers in cell and developmental biology · 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

9 authors at 4 institutions in 1 country.

Devi Rani SagarArthritis Research UK Pain Centre, University of Nottingham, Nottingham, UK.
Sadaf AshrafSchool of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast, Belfast, UK.
Luting XuArthritis Research UK Pain Centre, University of Nottingham, Nottingham, UK.
James J BurstonArthritis Research UK Pain Centre, University of Nottingham, Nottingham, UK.
Matthew R MenhinickFaculty of Medicine, University of Nottingham, Nottingham, UK.
Caroline L PoulterFaculty of Medicine, University of Nottingham, Nottingham, UK.
Andrew J BennettSchool of Biomedical Sciences, University of Nottingham, Nottingham, UK.
David A WalshArthritis Research UK Pain Centre, University of Nottingham, Nottingham, UK.
Victoria ChapmanArthritis Research UK Pain Centre, University of Nottingham, Nottingham, UK.
University of Nottingham · GBVersus Arthritis · GBQueen's Medical Centre · GBQueen's University Belfast · GB

Funding

Arthritis Research UKMedical Research Council MR/K00414X/1
6 · The paper itself

Abstract

backgroundIncreased subchondral bone turnover may contribute to pain in osteoarthritis (OA).

objectivesTo investigate the analgesic potential of a modified version of osteoprotegerin (osteoprotegerin-Fc (OPG-Fc)) in the monosodium iodoacetate (MIA) model of OA pain.

methodsMale Sprague Dawley rats (140-260 g) were treated with either OPG-Fc (3 mg/kg, subcutaneously) or vehicle (phosphate-buffered saline) between days 1 and 27 (pre-emptive treatment) or days 21 and 27 (therapeutic treatment) after an intra-articular injection of MIA (1 mg/50 µl) or saline. A separate cohort of rats received the bisphosphonate zoledronate (100 µg/kg, subcutaneously) between days 1 and 25 post-MIA injection. Incapacitance testing and von Frey (1-15 g) hind paw withdrawal thresholds were used to assess pain behaviour. At the end of the study, rats were killed and the knee joints and spinal cord removed for analysis. Immunohistochemical studies using Iba-1 and GFAP quantified levels of activation of spinal microglia and astrocytes, respectively. Joint sections were stained with haematoxylin and eosin or Safranin-O fast green and scored for matrix proteoglycan and overall joint morphology. The numbers of tartrate-resistant acid phosphatase-positive osteoclasts were quantified. N=10 rats/group.

resultsPre-emptive treatment with OPG-Fc significantly attenuated the development of MIA-induced changes in weightbearing, but not allodynia. OPG-Fc decreased osteoclast number, inhibited the formation of osteophytes and improved structural pathology within the joint similarly to the decrease seen after pretreatment with the bisphosphonate, zoledronate. Therapeutic treatment with OPG-Fc decreased pain behaviour, but did not improve pathology in rats with established joint damage.

conclusionsOur data suggest that early targeting of osteoclasts may reduce pain associated with OA.

Indexed as

AnimalsArthralgiaBehavior, AnimalBone Density Conservation AgentsBone RemodelingDiphosphonatesDisease Models, AnimalDrug DesignEnzyme InhibitorsImidazolesIodoacetic AcidJointsMaleNociceptorsOsteoarthritisOsteoclastsBone Density Conservation AgentsDiphosphonatesEnzyme InhibitorsImidazolesIodoacetic AcidOsteoprotegerinTnfrsf11b protein, ratZoledronic AcidKnee OsteoarthritisOsteoarthritisSynovitis

Identifiers

PMID23723320
PMCPMC4112443
OpenAlexW2157062522

What Socratic holds

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LicenceCC BY-NC
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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 Socratic graph.