Evidence map›Paper›PMID 31551473›Full record

ArticleScientific reports2019

Characterization of artificially re-pigmented ARPE-19 retinal pigment epithelial cell model.

Laura Hellinen, Marja Hagström, Heidi Knuutila, Marika Ruponen, Arto Urtti, Mika Reinisalo

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
2.0field-weighted citation impact, top 15% 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

24 citing papers in PubMed, 37 citations in OpenAlex.

  1. Article
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  4. Restoring Sight: The Journey of AIPL1 from Discovery to Therapy.International journal of molecular sciences · 2025
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  11. Evaluation of mesenchymal stem cells as anFrontiers in cell and developmental biology · 2024
    Review
  12. Article
  13. Engineered peptide-drug conjugate provides sustained protection of retinal ganglion cells with topical administration in rats.Journal of controlled release : official journal of the Controlled Release Society · 2023
    Article
  14. Article
  15. Article
  16. Review
  17. Article
  18. Article
  19. Role of In Vitro Models for Development of Ophthalmic Delivery Systems.Critical reviews in therapeutic drug carrier systems · 2021
    Review
  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

6 authors at 2 institutions in 2 countries.

Laura HellinenSchool of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, 70210, Kuopio, Finland.ORCID http://orcid.org/0000-0002-6090-1156
Marja HagströmDrug Research Programme, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014, Helsinki, Finland.
Heidi KnuutilaSchool of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, 70210, Kuopio, Finland.
Marika RuponenSchool of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, 70210, Kuopio, Finland.
Arto UrttiSchool of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, 70210, Kuopio, Finland.
Mika ReinisaloSchool of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, 70210, Kuopio, Finland. mika.reinisalo@uef.fi.ORCID http://orcid.org/0000-0002-1224-4331
University of Eastern Finland · FIUniversity of Helsinki · FI

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Melanin pigment has a significant role in ocular pharmacokinetics, because many drugs bind at high extent to melanin in the retinal pigment epithelial cells. Most retinal pigment epithelial cell lines lack pigmentation and, therefore, we re-pigmented human ARPE-19 cells to generate a pigmented cell model. Melanosomes from porcine retinal pigment epithelium were isolated and co-incubated with ARPE-19 cells that spontaneously phagocytosed the melanosomes. Internalized melanosomes were functionally integrated to the cellular system as evidenced by correct translocation of cellular Rab27a protein to the melanosomal membranes. The pigmentation was retained during cell cultivation and the level of pigmentation can be controlled by altering the amount of administered melanosomes. We used these cells to study melanosomal uptake of six drugs. The uptake was negligible with low melanin-binders (methotrexate, diclofenac) whereas most of the high melanin-binders (propranolol, chloroquine) were extensively taken up by the melanosomes. This cell line can be used to model pigmentation of the retinal pigment epithelium, while maintaining the beneficial cell line characteristics, such as fast generation of cultures, low cost, long-term maintenance and good reproducibility. The model enables studies at normal and decreased levels of pigmentation to model different retinal conditions.

Indexed as

AnimalsBiological TransportCell LineChloroquineDiclofenacHumansMelaninsMelanosomesMethotrexatePhagocytosisPigmentationPropranololRetinaRetinal Pigment EpitheliumRetinal PigmentsSwineChloroquineDiclofenacMelaninsMethotrexatePropranololRetinal Pigments

Identifiers

PMID31551473
PMCPMC6760193
OpenAlexW2976847117

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.