Evidence map›Paper›PMID 22440812›Full record

ArticleExperimental eye research2012

Intraocular distribution of melanin in human, monkey, rabbit, minipig and dog eyes.

Chandrasekar Durairaj, James E Chastain, Uday B Kompella

Open access · greenAbstract readComparative Study
In one paragraph

Article in Experimental eye research, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 52 papers.

0numbers the graph read from it
0cells of the map it votes in
52citing papers in PubMed
1.6field-weighted citation impact, top 18% 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

52 citing papers in PubMed, 79 citations in OpenAlex.

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  6. Look past the cooperative eye hypothesis: reconsidering the evolution of human eye appearance.Biological reviews of the Cambridge Philosophical Society · 2025
    Review
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  19. Quantitative systems pharmacology of the eye: Tools and data for ocular QSP.CPT: pharmacometrics & systems pharmacology · 2023
    Review
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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

3 authors at 2 institutions in 1 country.

Chandrasekar DurairajDepartment of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA.
James E Chastain
Uday B Kompella
University of Colorado Anschutz Medical Campus · USAlcon (United States) · US

Funding

Transcleral Therapeutics in Diabetic RetinopathyR01EY018940 · NEI · UNIVERSITY OF COLORADO DENVER · PI KOMPELLA, UDAY B · 2010 to 2014
$2.4M
Influence of eye pigmentation and diabetes on retinal drug deliveryR01EY017533 · NEI · UNIVERSITY OF COLORADO DENVER · PI KOMPELLA, UDAY B · 2009 to 2010
$806k
NEI NIH HHS R01 EY017533NEI NIH HHS R01EY017533NEI NIH HHS R01 EY018940NEI NIH HHS R01EY018940
6 · The paper itself

Abstract

The purpose of this study was to quantify the melanin pigment content in sclera, choroid-RPE, and retina, three tissues encountered during transscleral drug delivery to the vitreous, in human, rabbit, monkey, minipig, and dog models. Strain differences were assessed in NZW × NZR F1 and Dutch belted rabbits and Yucatan and Gottingen minipigs. The choroid-RPE and retina tissues were divided into central (posterior pole area) and peripheral (away from posterior pole) regions while the sclera was analyzed without such division. Melanin content in the tissues was analyzed using a colorimetric assay. In all species the rank order for pigment content was: choroid-RPE >retina ≥ sclera, except in humans, where scleral melanin levels were higher than retina and central choroid. The melanin content in a given tissue differed between species. Further, while the peripheral tissue pigment levels tended to be generally higher compared to the central regions, these differences were significant in human in the case of choroid-RPE and in human, monkey, and dogs in the case of retina. Strain difference was observed only in the central choroid-RPE region of rabbits (NZW × NZR F1 >Dutch Belted). Species, strain, and regional differences exist in the melanin pigment content in the tissues of the posterior segment of the eye, with Gottingen minipig being closest to humans among the animals assessed. These differences in melanin content might contribute to differences in drug binding, delivery, and toxicity.

Indexed as

AnimalsChoroidColorimetryDogsEye ProteinsHumansMacaca fascicularisMelaninsRabbitsRetinaRetinal Pigment EpitheliumScleraSwineSwine, MiniatureEye ProteinsMelanins

Identifiers

PMID22440812
PMCPMC3358346
OpenAlexW1971274032

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.