Evidence map›Paper›PMID 22834682›Full record

ArticleChemical biology & drug design2012

Superior analgesic effect of H-Dmt-D-Arg-Phe-Lys-NH2 ([Dmt1]DALDA), a multifunctional opioid peptide, compared to morphine in a rat model of neuropathic pain.

Megumi Shimoyama, Peter W Schiller, Naohito Shimoyama, Satoshi Toyama, Hazel H Szeto

Open access · bronzeAbstract readComparative StudyLetter
In one paragraph

Article in Chemical biology & drug design, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
0.7field-weighted citation impact, top 31% 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

7 citing papers in PubMed, 10 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. [Dmt(1)]DALDA analogues modified with tyrosine analogues at position 1.Bioorganic & medicinal chemistry letters · 2016
    Article
  5. Article
  6. Article
  7. Review
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

5 authors at 4 institutions in 3 countries.

Megumi Shimoyama
Peter W Schiller
Naohito Shimoyama
Satoshi Toyama
Hazel H Szeto
Chiba University · JPCornell University · USMontreal Clinical Research Institute · CATokyo Medical University · JP

Funding

SYSTEMICALLY-ACTIVE OPIOID PEPTIDE ANALOGSP01DA008924 · NIDA · WEILL MEDICAL COLL OF CORNELL UNIV · PI SZETO, HAZEL H · 1994 to 2007
$6.5M
DEVELOPMENT OF RECEPTOR-SPECIFIC OPIOID PEPTIDE ANALOGSR01DA004443 · NIDA · CLINICAL RESEARCH INSTITUTE OF MONTREAL · PI SCHILLER, PETER W · 1987 to 2016
$2.0M
DEVELOPMENT OF RECEPTOR SPECIFIC OPIOID PEPTIDE ANALOGSR37DA004443 · NIDA · CLINICAL RESEARCH INSTITUTE OF MONTREAL · PI SCHILLER, PETER W · 1997 to 2003
$621k
NIDA NIH HHS DA004443NIDA NIH HHS DA08924NIDA NIH HHS P01 DA008924NIDA NIH HHS R01 DA004443NIDA NIH HHS R37 DA004443
6 · The paper itself

Abstract

H-Dmt-D-Arg-Phe-Lys-NH(2) ([Dmt(1)]DALDA) is a synthetic tetrapeptide with extraordinary selectivity for the mu-opioid receptor and is an extremely potent analgesic. [Dmt(1) ]DALDA is unusual in the way that the greater part of its analgesic potency appears to be produced by its actions in the spinal cord. Furthermore, [Dmt(1) ]DALDA inhibits norepinephrine re-uptake and is a mitochondria-targeted antioxidant. Such characteristics may make [Dmt(1)]DALDA particularly effective against neuropathic pain. The present study was designed to compare the effects of [Dmt(1)]DALDA and morphine on thermal hyperalgesia in an experimental neuropathic pain model. Neuropathic pain was induced in rats by surgical ligation of the L5 spinal nerve, and thermal pain thresholds were assessed by latencies of paw withdrawal to radiant heat. The increase in paw withdrawal latency was greater after the administration of [Dmt(1) ]DALDA than that of morphine in neuropathic rats at doses that were equianalgesic in naïve animals. We conclude that [Dmt(1)]DALDA is more effective than morphine against thermal hyperalgesia in this experimental model of neuropathic pain.

Indexed as

Analgesics, OpioidAnimalsMaleMorphineNeuralgiaOligopeptidesRatsRats, Sprague-DawleyReceptors, Opioid, muAnalgesics, OpioidMorphineOligopeptidesReceptors, Opioid, mutyrosyl-arginyl-phenylalanyl-lysinamide

Identifiers

PMID22834682
PMCPMC3465489
OpenAlexW1503480948

What OpenQuestion holds

Textmetadata
LicenceTDM
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.