Evidence map›Paper›PMID 20675160›Full record

ArticleEuropean journal of pain (London, England)2011

Peripheral N-methyl-d-aspartate receptors contribute to mechanical hypersensitivity in a rat model of inflammatory temporomandibular joint pain.

J J Ivanusic, D Beaini, R J Hatch, V Staikopoulos, B J Sessle, E A Jennings

Abstract read
In one paragraph

Article in European journal of pain (London, England), 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
1.5field-weighted citation impact, top 18% 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

16 citing papers in PubMed, 34 citations in OpenAlex.

  1. Mutual effect between neuropeptides and inflammatory cytokines in neurogenic SMSCs of human temporomandibular joint.Journal of Huazhong University of Science and Technology. Medical sciences = Hua zhong ke ji da xue xue bao. Yi xue Ying De wen ban = Huazhong keji daxue xuebao. Yixue Yingdewen ban · 2014
    Trial
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  13. Nitric oxide release from trigeminal satellite glial cells is attenuated by glial modulators and glutamate.International journal of physiology, pathophysiology and pharmacology · 2013
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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

6 authors at 2 institutions in 2 countries.

J J IvanusicDepartment of Anatomy and Cell Biology, University of Melbourne, Melbourne 3010, Australia.
D Beaini
R J Hatch
V Staikopoulos
B J Sessle
E A Jennings
University of Melbourne · AUUniversity of Toronto · CA

Funding

DENTAL &OROFACIAL PAIN: BRAINSTEM &THALAMIC MECHANISMSR01DE004786 · NIDCR · UNIVERSITY OF TORONTO · PI SESSLE, BARRY J. · 1985 to 2011
$2.5M
NIDCR NIH HHS DE04786NIDCR NIH HHS R01 DE004786
6 · The paper itself

Abstract

The aim of this study was to determine whether peripheral N-methyl-d-aspartate (NMDA) receptors are involved in inflammation-induced mechanical hypersensitivity of the temporomandibular joint (TMJ) region. We developed a rat model of mechanical sensitivity to Complete Freund's Adjuvant (CFA; 2μl containing 1μg Mycobacterium tuberculosis)-induced inflammation of the TMJ and examined changes in sensitivity following injection of NMDA receptor antagonists (dl-2-amino-5-phosphonovaleric acid (AP5) or Ifenprodil) with CFA. CFA injected into the TMJ resulted in an increase in mechanical sensitivity relative to pre-injection that peaked at day 1 and lasted for up to 3days (n=8, P<0.05). There was no change in mechanical sensitivity in vehicle-injected rats at any time-point (n=9). At day 1, there was a significant increase in mechanical sensitivity in animals injected with CFA+vehicle (n=7) relative to those injected with vehicle alone (n=7, P<0.05), and co-injection of AP5 (n=6) or Ifenprodil (n=7) with CFA blocked this hypersensitivity. Subcutaneous injection of AP5 (n=7) and Ifenprodil (n=5) instead of into the TMJ had no significant effect on CFA-induced hypersensitivity of the TMJ region. Western blot analysis revealed constitutive expression of the NR1 and NR2B subunits in trigeminal ganglion lysates. Immunohistochemical studies showed that 99% and 28% of trigeminal ganglion neurons that innervated the TMJ contained the NR1 and NR2B subunits respectively. Our findings suggest a role for peripheral NMDA receptors in inflammation-induced pain of the TMJ region. Targeting peripheral NMDA receptors with peripheral application of NMDA receptor antagonists could provide therapeutic benefit and avoid side effects associated with blockade of NMDA receptors in the central nervous system.

Indexed as

Analysis of VarianceAnimalsBlotting, WesternExcitatory Amino Acid AntagonistsHyperalgesiaImmunohistochemistryInflammationMalePain MeasurementPhysical StimulationPiperidinesRatsRats, Sprague-DawleyReceptors, N-Methyl-D-AspartateTemporomandibular JointExcitatory Amino Acid AntagonistsifenprodilPiperidinesReceptors, N-Methyl-D-Aspartate

Identifiers

PMID20675160
PMCPMC2980803
OpenAlexW2103671788

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.