Evidence map›Paper›PMID 31287995›Full record

ArticleThe American journal of pathology2019

Liver-Specific, but Not Retina-Specific, Hepcidin Knockout Causes Retinal Iron Accumulation and Degeneration.

Bailey H Baumann, Wanting Shu, Ying Song, Jacob Sterling, Zbynek Kozmik, Samira Lakhal-Littleton, Joshua L Dunaief

Open access · bronzeAbstract read
In one paragraph

Article in The American journal of pathology, 2019. 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
2.3field-weighted citation impact, top 11% 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

20 citing papers in PubMed, 29 citations in OpenAlex.

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  3. microLife · 2026
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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

7 authors at 5 institutions in 4 countries.

Bailey H BaumannF.M. Kirby Center for Molecular Ophthalmology, Scheie Eye Institute, Perelman School of Medicine at the University of Pennsylvania, 305 Stellar-Chance Laboratory, Philadelphia, Pennsylvania.
Wanting ShuF.M. Kirby Center for Molecular Ophthalmology, Scheie Eye Institute, Perelman School of Medicine at the University of Pennsylvania, 305 Stellar-Chance Laboratory, Philadelphia, Pennsylvania; Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Ocular Fundus Diseases, Shanghai Engineering Center for Visual Science and Photomedicine, Shanghai, China.
Ying SongF.M. Kirby Center for Molecular Ophthalmology, Scheie Eye Institute, Perelman School of Medicine at the University of Pennsylvania, 305 Stellar-Chance Laboratory, Philadelphia, Pennsylvania.
Jacob SterlingF.M. Kirby Center for Molecular Ophthalmology, Scheie Eye Institute, Perelman School of Medicine at the University of Pennsylvania, 305 Stellar-Chance Laboratory, Philadelphia, Pennsylvania.
Zbynek KozmikInstitute of Molecular Genetics, Academy of Sciences of the Czech Republic, Academy of Sciences of the Czech Republic (ASCR), Prague, Czech Republic.
Samira Lakhal-LittletonDepartment of Physiology, Anatomy and Genetics, University of Oxford, Oxford, United Kingdom.
Joshua L DunaiefF.M. Kirby Center for Molecular Ophthalmology, Scheie Eye Institute, Perelman School of Medicine at the University of Pennsylvania, 305 Stellar-Chance Laboratory, Philadelphia, Pennsylvania. Electronic address: jdunaief@pennmedicine.upenn.edu.
University of Pennsylvania · USCzech Academy of Sciences · CZPenn Presbyterian Medical Center · USShanghai Jiao Tong University · CNUniversity of Oxford · GB

Funding

MEDICAL SCIENTIST TRAINING PROGRAMT32GM007170 · NIGMS · UNIVERSITY OF PENNSYLVANIA · PI BRASS, LAWRENCE F · 1985 to 2022
$54.0M
Retinal Iron Transport in Health and DiseaseR01EY015240 · NEI · UNIVERSITY OF PENNSYLVANIA · PI JOSHUA L DUNAIEF · 2004 to 2026
$10.4M
RESEARCH ON NORMAL AND ABNORMAL MECHANISMS OF VISIONST32EY007035 · NEI · UNIVERSITY OF PENNSYLVANIA · PI Diego Contreras, Jessica I.W. Morgan · 1985 to 2026
$4.9M
VMD-PhD Training in Infectious Disease-Related ResearchT32AI070077 · NIAID · UNIVERSITY OF PENNSYLVANIA · PI Michael Lee Atchison · 2008 to 2026
$3.5M
The IL-6 Induced Retinal Iron Sequestration ResponseR01EY028916 · NEI · UNIVERSITY OF PENNSYLVANIA · PI DUNAIEF, JOSHUA L · 2019 to 2023
$2.4M
British Heart Foundation FS/12/63/29895NEI NIH HHS R01 EY015240NEI NIH HHS R01 EY028916NEI NIH HHS T32 EY007035NIAID NIH HHS T32 AI070077NIGMS NIH HHS T32 GM007170
6 · The paper itself

Abstract

The liver secretes hepcidin (Hepc) into the bloodstream to reduce blood iron levels. Hepc accomplishes this by triggering degradation of the only known cellular iron exporter ferroportin in the gut, macrophages, and liver. We previously demonstrated that systemic Hepc knockout (HepcKO) mice, which have high serum iron, develop retinal iron overload and degeneration. However, it was unclear whether this is caused by high blood iron levels or, alternatively, retinal iron influx that would normally be regulated by retina-produced Hepc. To address this question, retinas of liver-specific and retina-specific HepcKO mice were studied. Liver-specific HepcKO mice had elevated blood and retinal pigment epithelium (RPE) iron levels and increased free (labile) iron levels in the retina, despite an intact blood-retinal barrier. This led to RPE hypertrophy associated with lipofuscin-laden lysosome accumulation. Photoreceptors also degenerated focally. In contrast, there was no change in retinal or RPE iron levels or degeneration in the retina-specific HepcKO mice. These data indicate that high blood iron levels can lead to retinal iron accumulation and degeneration. High blood iron levels can occur in patients with hereditary hemochromatosis or result from use of iron supplements or multiple blood transfusions. Our results suggest that high blood iron levels may cause or exacerbate retinal disease.

Indexed as

AnimalsBlood-Retinal BarrierFemaleHepcidinsIronIron OverloadLiverMaleMiceMice, Inbred C57BLMice, KnockoutRetinaRetinal DegenerationHamp protein, mouseHepcidinsIron

Identifiers

PMID31287995
PMCPMC6723216
OpenAlexW2955322511

What OpenQuestion holds

Textmetadata
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.