Evidence map›Paper›PMID 24824436›Full record

ArticleEuropean journal of pain (London, England)2015

Impact of surgical excision of lesions on pain in a rat model of endometriosis.

P Alvarez, L C Giudice, J D Levine

Open access · greenAbstract read
In one paragraph

Article in European journal of pain (London, England), 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
1.2field-weighted citation impact, top 19% 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

5 citing papers in PubMed, 10 citations in OpenAlex.

  1. Article
  2. Review
  3. Research Priorities for Endometriosis.Reproductive sciences (Thousand Oaks, Calif.) · 2017
    Article
  4. Article
  5. Article
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

3 authors at 2 institutions in 1 country.

P AlvarezDepartment of Oral and Maxillofacial Surgery, University of California San Francisco, USA; Division of Neuroscience, University of California San Francisco, USA.
L C Giudice
J D Levine
University of California, San Francisco · USReproductive Science Center · US

Funding

Acute-to-Chronic Transition in Ergonomic Muscle Pain: Nociceptor MechanismsR01AR063312 · NIAMS · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI LEVINE, JON DAVID · 2013 to 2022
$6.5M
Vascular Pain MechanismsR01NS085831 · NINDS · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI LEVINE, JON DAVID · 2014 to 2018
$2.3M
NIAMS NIH HHS R01 AR063312NINDS NIH HHS R01 NS085831
6 · The paper itself

Abstract

backgroundChronic pain is the most common and disabling feature of endometriosis. Surgical excision of endometriosis lesions provides relief but pain relapse is common. Studies in a preclinical model of endometriosis might help to unravel the role of the ectopic lesions as the source of pain. Thus, we evaluated the impact of lesion excision on mechanical hyperalgesia in a preclinical model of endometriosis pain.

methodsEndometriosis was induced by implanting autologous uterine tissue onto the gastrocnemius muscle. Surgical excision or aspiration drainage of the cystic lesion was performed at different times post-implant and mechanical nociceptive thresholds were assessed at the site of the lesion.

resultsLesions at 2, 8 and 16 weeks post-implant produced mechanical hyperalgesia of similar magnitude (n = 6/group). Excision of lesions (n = 6/group) produced a longer inhibition, with a magnitude and time course depending upon the timing of excision. Excision at 2 and 8 weeks produced a rapid onset marked attenuation of hyperalgesia, which returned to pre-excision values by post-surgical week 3. In contrast, excision of the lesion at 16 weeks produced a peak of inhibition of hyperalgesia 2 weeks post-excision, but then the inhibition was sustained. Aspiration of fluid from cysts in the lesions briefly attenuated mechanical hyperalgesia (n = 6/group).

conclusionsIn this preclinical model, we demonstrate that endometriosis pain is alleviated by surgical excision of the ectopic lesion or drainage of its cysts, providing support for the clinical observation that endometriosis pain is dependent upon the ongoing presence of the lesions.

Indexed as

AnimalsChronic PainDisease Models, AnimalEndometriosisFemaleHyperalgesiaPain MeasurementPain ThresholdRatsRats, Sprague-DawleyTreatment Outcome

Identifiers

PMID24824436
PMCPMC4231021
OpenAlexW1828788757

What OpenQuestion holds

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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.