Evidence map›Paper›PMID 34163358›Full record

ArticleFrontiers in pharmacology2021

Effects of Topical Gabapentin on Ocular Pain and Tear Secretion.

Maurizio Cammalleri, Rosario Amato, Melania Olivieri, Salvatore Pezzino, Paola Bagnoli, Massimo Dal Monte, Dario Rusciano

Open access · goldAbstract read
In one paragraph

Article in Frontiers in pharmacology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
3.5field-weighted citation impact, top 7% 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

12 citing papers in PubMed, 20 citations in OpenAlex.

  1. Review
  2. Article
  3. Review
  4. Review
  5. Review
  6. Aquaporins in the Cornea.International journal of molecular sciences · 2024
    Review
  7. Review
  8. Article
  9. Ion channels in dry eye disease.Indian journal of ophthalmology · 2023
    Review
  10. Aquaporin-5 Dynamic Regulation.International journal of molecular sciences · 2023
    Review
  11. Review
  12. 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

7 authors at 1 institution in 1 country.

Maurizio CammalleriDepartment of Biology, University of Pisa, Pisa, Italy.
Rosario AmatoDepartment of Biology, University of Pisa, Pisa, Italy.
Melania OlivieriSooft Italia SpA, Research Center, Catania, Italy.
Salvatore PezzinoSooft Italia SpA, Research Center, Catania, Italy.
Paola BagnoliDepartment of Biology, University of Pisa, Pisa, Italy.
Massimo Dal MonteDepartment of Biology, University of Pisa, Pisa, Italy.
Dario RuscianoSooft Italia SpA, Research Center, Catania, Italy.
University of Pisa · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Neuropathic ocular pain is a frequent occurrence in medium to severe dry eye disease (DED). Only palliative treatments, such as lubricants and anti-inflammatory drugs, are available to alleviate patients' discomfort. Anesthetic drugs are not indicated, because they may interfere with the neural feedback between the cornea and the lacrimal gland, impairing tear production and lacrimation. Gabapentin (GBT) is a structural analog of gamma-amino butyric acid that has been used by systemic administration to provide pain relief in glaucomatous patients. We have already shown in a rabbit model system that its topic administration as eye drops has anti-inflammatory properties. We now present data on rabbits' eyes showing that indeed GBT given topically as eye drops has analgesic but not anesthetic effects. Therefore, opposite to an anesthetic drug such as oxybuprocaine, GBT does not decrease lacrimation, but-unexpectedly-even stimulates it, apparently through the upregulation of acetylcholine and norepinephrine, and by induction of aquaporin 5 (AQP5) expression in the lacrimal gland. Moreover, data obtained

Indexed as

aquaporin 5autonomous nervous systemcorneal epithelial cellscorneal sensitivitydry eye syndromelacrimal glandneuropathic ocular painPKA/CREB pathway

Identifiers

PMID34163358
PMCPMC8216672
OpenAlexW3170307362

What OpenQuestion holds

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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.