Evidence map›Paper›PMID 20843331›Full record

Trial reportMolecular pain2010

Nitric oxide is negatively correlated to pain during acute inflammation.

May Hamza, Xiao-Min Wang, Tongtong Wu, Jaime S Brahim, Janet S Rowan, Raymond A Dionne

Open access · goldAbstract readClinical Trial
In one paragraph

Trial report in Molecular pain, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
0.9field-weighted citation impact, top 26% 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

11 citing papers in PubMed, 32 citations in OpenAlex.

  1. Trial
  2. Article
  3. Article
  4. Article
  5. Article
  6. Review
  7. Review
  8. Article
  9. Article
  10. Review
  11. Effects of inducible nitric oxide synthase blockade within the periaqueductal gray on cardiovascular responses during mechanical, heat, and cold nociception.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2012
    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

6 authors at 4 institutions in 2 countries.

May HamzaNINR/NIH, Bethesda, MD 20892, USA.
Xiao-Min Wang
Tongtong Wu
Jaime S Brahim
Janet S Rowan
Raymond A Dionne
National Institutes of Health · USCardinal Glennon Children’s Medical Center · USUniversity of Maryland, Baltimore · USUniversity of Maryland, College Park · US

Funding

Molecular-Genetic Mechs Underlying Effects of Anti-inflammatory/Analgesic DrugsZIANR000014 · NINR · NATIONAL INSTITUTE OF NURSING RESEARCH · PI CASHION, ANN · 2009 to 2013
$7.5M
Intramural NIH HHS
6 · The paper itself

Abstract

backgroundThe role that nitric oxide (NO) plays in modulating pain in the periphery is unclear. We show here, the results of two independent clinical studies (microdialysis and gene expression studies) and a pilot dose finding study (glyceryl trinitrate study), to study the role of NO in the early phase of acute inflammatory pain following oral surgery. The effect of ketorolac on NO production and nitric oxide synthase (NOS) gene expression was also studied.

resultsMicrodialysis samples showed significantly higher levels of NO at the first 100 min compared to the last 80 minutes in the placebo treated group. In the ketorolac group, on the other hand, NO levels gradually decreased over the first 60 min but were similar to placebo over the later 100-180 min, with no significant change in NO level over time. The levels of NO were negatively correlated to pain intensity scores. Local infusion of the NO donor glyceryl trinitrate at the site of surgery, showed a small analgesic effect that did not reach statistical significance in the sample size used. While the gene expression of iNOS and eNOS were not up-regulated, 3 hours after surgery, nNOS was downregulated in both treatment groups and eNOS gene expression was significantly lower in the ketorolac group compared to the placebo group. Further, there was a positive correlation between the change in gene expression of nNOS and eNOS in the placebo group but not in the ketorolac group.

conclusionWe suggest that at this early stage of inflammatory pain in man, NO is analgesic in the periphery. Further, ketorolac down-regulates eNOS gene expression.

Indexed as

Acute DiseaseAdolescentAdultFemaleGene Expression Regulation, EnzymologicHumansInflammationIsoenzymesKetorolacLinear ModelsMaleMicrodialysisModels, BiologicalNitric OxideNitric Oxide DonorsNitric Oxide SynthaseIsoenzymesKetorolacNitric OxideNitric Oxide DonorsNitric Oxide SynthaseNitroglycerin

Identifiers

PMID20843331
PMCPMC2949722
OpenAlexW2144958944

What OpenQuestion holds

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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.