Evidence map›Paper›PMID 33822768›Full record

ArticleJCI insight2021

Mitochondria-dependent phase separation of disease-relevant proteins drives pathological features of age-related macular degeneration.

Nilsa La Cunza, Li Xuan Tan, Thushara Thamban, Colin J Germer, Gurugirijha Rathnasamy, Kimberly A Toops, Aparna Lakkaraju

Open access · goldAbstract read
In one paragraph

Article in JCI insight, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 41 papers.

0numbers the graph read from it
0cells of the map it votes in
41citing papers in PubMed
6.7field-weighted citation impact, top 2% 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

41 citing papers in PubMed, 52 citations in OpenAlex.

  1. Article
  2. Article
  3. Review
  4. Review
  5. Article
  6. Review
  7. Article
  8. Review
  9. Article
  10. Article
  11. Review
  12. Article
  13. Review
  14. Phase separation in mitochondrial fate and mitochondrial diseases.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Review
  15. Review
  16. Review
  17. Suppressing APOE4-induced neural pathologies by targeting the VHL-HIF axis.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  18. Review
  19. Article
  20. 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 2 institutions in 1 country.

Nilsa La CunzaDepartment of Ophthalmology, School of Medicine, and.
Li Xuan TanDepartment of Ophthalmology, School of Medicine, and.
Thushara ThambanDepartment of Ophthalmology, School of Medicine, and.
Colin J GermerDepartment of Ophthalmology, School of Medicine, and.
Gurugirijha RathnasamyDepartment of Ophthalmology, School of Medicine, and.
Kimberly A ToopsDepartment of Ophthalmology and Visual Sciences, University of Wisconsin-Madison, Madison, Wisconsin, USA.
Aparna LakkarajuDepartment of Ophthalmology, School of Medicine, and.
University of California, San Francisco · USUniversity of Wisconsin–Madison · US

Funding

Rapid-Prototyping and Design CoreP30EY002162 · NEI · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI ULLIAN, ERIK M · 1985 to 2024
$16.8M
UW Vision Research Core - Administrative CoreP30EY016665 · NEI · UNIVERSITY OF WISCONSIN-MADISON · PI AKIHIRO IKEDA · 2005 to 2026
$12.6M
Mechanisms of RPE dysfunction in macular degenerations: role of intracellular complement activationR01EY030668 · NEI · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI LAKKARAJU, APARNA · 2020 to 2024
$3.5M
Mechanisms of cellular clearance in the retinal pigment epitheliumR01EY023299 · NEI · UNIVERSITY OF WISCONSIN-MADISON · PI LAKKARAJU, APARNA · 2015 to 2019
$2.3M
NEI NIH HHS P30 EY002162NEI NIH HHS P30 EY016665NEI NIH HHS R01 EY023299NEI NIH HHS R01 EY030668
6 · The paper itself

Abstract

Age-related macular degeneration (AMD) damages the retinal pigment epithelium (RPE), the tissue that safeguards photoreceptor health, leading to irreversible vision loss. Polymorphisms in cholesterol and complement genes are implicated in AMD, yet mechanisms linking risk variants to RPE injury remain unclear. We sought to determine how allelic variants in the apolipoprotein E cholesterol transporter modulate RPE homeostasis and function. Using live-cell imaging, we show that inefficient cholesterol transport by the AMD risk-associated ApoE2 increases RPE ceramide, leading to autophagic defects and complement-mediated mitochondrial damage. Mitochondrial injury drives redox state-sensitive cysteine-mediated phase separation of ApoE2, forming biomolecular condensates that could nucleate drusen. The protective ApoE4 isoform lacks these cysteines and is resistant to phase separation and condensate formation. In Abca-/- Stargardt macular degeneration mice, mitochondrial dysfunction induces liquid-liquid phase separation of p62/SQSTM1, a multifunctional protein that regulates autophagy. Drugs that decrease RPE cholesterol or ceramide prevent mitochondrial injury and phase separation in vitro and in vivo. In AMD donor RPE, mitochondrial fragmentation correlates with ApoE and p62 condensates. Our studies demonstrate that major AMD genetic and biological risk pathways converge upon RPE mitochondria, and identify mitochondrial stress-mediated protein phase separation as an important pathogenic mechanism and promising therapeutic target in AMD.

Indexed as

AnimalsApolipoprotein E2Apolipoprotein E4AutophagyBiomolecular CondensatesCeramidesCholesterolComplement System ProteinsIntravital MicroscopyMacular DegenerationMiceMice, KnockoutMitochondriaOxidative StressRetinal Pigment EpitheliumSequestosome-1 ProteinApolipoprotein E2Apolipoprotein E4CeramidesCholesterolComplement System ProteinsSequestosome-1 ProteinSqstm1 protein, mouseCholesterolComplementOphthalmologyRetinopathy

Identifiers

PMID33822768
PMCPMC8262309
OpenAlexW3142189813

What Socratic 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 Socratic graph.