Evidence map›Paper›PMID 33713254›Full record

ArticleInternational ophthalmology2021

Compatibility of intravitreally applied epidermal growth factor and amphiregulin.

Mukharram M Bikbov, Timur A Khalimov, Marc Cerrada-Gimenez, Symantas Ragauskas, Giedrius Kalesnykas, Jost B Jonas

Open access · hybridAbstract read
In one paragraph

Article in International ophthalmology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
0.7field-weighted citation impact, top 33% 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

4 citing papers in PubMed, 7 citations in OpenAlex.

  1. Article
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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 3 institutions in 3 countries.

Mukharram M BikbovUfa Eye Research Institute, Ufa, Bashkortostan, Russia.
Timur A KhalimovUfa Eye Research Institute, Ufa, Bashkortostan, Russia.
Marc Cerrada-GimenezExperimentica Ltd, Kuopio, Finland.
Symantas RagauskasExperimentica Ltd, Kuopio, Finland.
Giedrius KalesnykasExperimentica Ltd, Kuopio, Finland.
Jost B JonasDepartment of Ophthalmology, Medical Faculty Mannheim, Heidelberg University, Universitäts-Augenklinik, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany. Jost.Jonas@medma.uni-heidelberg.de.ORCID http://orcid.org/0000-0003-2972-5227
Eastern Finland Laboratory Center · FIUfa Eye Research Institute · RUHeidelberg University · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionTo examine the compatibility of intravitreally injected epidermal growth factor (EGF) and amphiregulin as EGF family member.

methodsFour rabbits (age: 4 months; body weight: 2.5 kg) received three intravitreal injections of EGF (100 ng) uniocularly in monthly intervals and underwent ocular photography, tonometry, biometry, and optical coherence tomography. After sacrificing the rabbits, the globes were histomorphometrically examined. In a second study part, eyes of 22 guinea pigs (age: 2-3 weeks) received two intravitreal administrations of amphiregulin (10 ng) or phosphate buffered solution (PBS) in 10-day interval, or were left untouched. Ten days after the second injection, the guinea pigs were sacrificed, the enucleated eyes underwent histological and immune-histological examinations.

resultsThe rabbit eyes with EGF injections versus the contralateral untouched eyes did not show significant differences in intraocular pressure (7.5 ± 2.4 mmHg vs. 6.8 ± 2.2 mmHg; P = 0.66), retinal thickness (158 ± 5 µm vs. 158 ± 3 µm; P = 1.0), cell counts in the retinal ganglion cell layer (3.3 ± 1.7 cells/150 µm vs. 3.0 ± 1.4 cells/150 µm; P = 0.83), inner nuclear layer (46.4 ± 23.2 cells/150 µm vs. 39.6 ± 6.4 cells/150 µm; P = 0.61), and outer nuclear layer (215 ± 108 cells/150 µm vs. 202 ± 47 cells/150 µm; P = 0.83), or any apoptotic retinal cells. The guinea pig eyes injected with amphiregulin versus eyes with PBS injections did not differ (P = 0.72) in the degree of microglial activation, and both groups did not differ from untouched eyes in number of apoptotic retinal cells and retinal gliosis.

conclusionsIntravitreal applications of EGF (100 ng) in rabbits nor intravitreal applications of amphiregulin (10 ng) in guinea pigs led to intraocular specific inflammation or any observed intraocular destructive effect. The findings support the notion of a compatibility of intraocular applied EGF and amphiregulin.

Indexed as

Epidermal Growth FactorRetinaAmphiregulinAnimalsGuinea PigsIntraocular PressureIntravitreal InjectionsRabbitsAmphiregulinEpidermal Growth FactorAmphiregulinEpidermal growth factorEpidermal growth factor receptorRetinaRetinal pigment epitheliumToxicity

Identifiers

PMID33713254
PMCPMC8172503
OpenAlexW3135173118

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.