Evidence map›Paper›PMID 33671213›Full record

ArticleInternational journal of molecular sciences2021

Effect of Ultra-Micronized-Palmitoylethanolamide and Acetyl-l-Carnitine on Experimental Model of Inflammatory Pain.

Alessio Ardizzone, Roberta Fusco, Giovanna Casili, Marika Lanza, Daniela Impellizzeri, Emanuela Esposito, Salvatore Cuzzocrea

Abstract read
In one paragraph

Article in International journal of molecular sciences, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
–field-weighted citation impact
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

20 citing papers in PubMed.

  1. Pharmaceuticals (Basel, Switzerland) · 2025
    Article
  2. Article
  3. Article
  4. Review
  5. International journal of molecular sciences · 2024
    Article
  6. Article
  7. Article
  8. UltramicronizedCurrent neuropharmacology · 2024
    Article
  9. Article
  10. Review
  11. Article
  12. Review
  13. Review
  14. Article
  15. Journal of clinical medicine · 2022
    Article
  16. Article
  17. Article
  18. Review
  19. Article
  20. 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

7 authors.

Alessio ArdizzoneDepartment of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, 98166 Messina (ME), Italy.
Roberta FuscoDepartment of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, 98166 Messina (ME), Italy.ORCID 0000-0003-0223-1403
Giovanna CasiliDepartment of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, 98166 Messina (ME), Italy.
Marika LanzaDepartment of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, 98166 Messina (ME), Italy.
Daniela ImpellizzeriDepartment of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, 98166 Messina (ME), Italy.ORCID 0000-0001-9492-3161
Emanuela EspositoDepartment of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, 98166 Messina (ME), Italy.ORCID 0000-0002-2663-6387
Salvatore CuzzocreaDepartment of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, 98166 Messina (ME), Italy.ORCID 0000-0001-6131-3690

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Palmitoylethanolamide (PEA), a fatty acid amide, has been widely investigated for its analgesic and anti-inflammatory properties. The ultra-micronized formulation of PEA (um-PEA), that has an enhanced rate of dissolution, is extensively used. Acetyl-l-carnitine (LAC), employed for the treatment of neuropathic pain in humans, is able to cause analgesia by up-regulating type-2 metabotropic glutamate (mGlu2) receptors. In the present study, we tested different associations of um-PEA, LAC and non-micronized PEA (non-m-PEA) in a rat model of carrageenan (CAR)-induced paw edema. Intraplantar injection of CAR into the hind paw of animals caused edema, thermal hyperalgesia, accumulation of infiltrating inflammatory cells and augmented myeloperoxidase (MPO) activity. All these parameters were decreased in a significantly manner by oral administration of a compound constituted by a mixture of um-PEA and LAC in relation 1:1 (5 mg/kg), but not with the association of single compounds administered one after the other. These findings showed the superior anti-inflammatory and anti-nociceptive action displayed by oral administration of um-PEA and LAC versus LAC plus, separate but consecutive, um-PEA in the rat paw CAR model of inflammatory pain.

Indexed as

AcetylcarnitineAmidesAnimalsCarrageenanCell CountCyclooxygenase 2Disease Models, AnimalEdemaEthanolaminesHyperalgesiaInflammationIntercellular Adhesion Molecule-1Interleukin-1betaMaleMast CellsNitric Oxide Synthase Type IIAcetylcarnitineAmidesCarrageenanCyclooxygenase 2EthanolaminesIntercellular Adhesion Molecule-1Interleukin-1betaNitric Oxide Synthase Type IIpalmidrolPalmitic AcidsPeroxidaseTumor Necrosis Factor-alphaacetyl-l-carnitine (LAC)carrageenan (CAR)edemainflammatory painpalmitoylethanolamide (PEA)

Identifiers

PMID33671213
PMCPMC7922157

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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.