Evidence map›Paper›PMID 32242066›Full record

ArticleScientific reports2020

Shear Stress in Schlemm's Canal as a Sensor of Intraocular Pressure.

Fiona McDonnell, Kristin M Perkumas, Nicole E Ashpole, Joan Kalnitsky, Joseph M Sherwood, Darryl R Overby, W Daniel Stamer

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
4.3field-weighted citation impact, top 5% 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

26 citing papers in PubMed, 34 citations in OpenAlex.

  1. Article
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  5. Article
  6. Mechanobiology in the eye.npj biological physics and mechanics · 2025
    Review
  7. Article
  8. The Factors Affecting the Stability of IOP Homeostasis.Investigative ophthalmology & visual science · 2024
    Article
  9. Review
  10. Article
  11. 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

7 authors at 2 institutions in 2 countries.

Fiona McDonnellDuke Eye Center, Durham, North Carolina, USA.
Kristin M PerkumasDuke Eye Center, Durham, North Carolina, USA.
Nicole E AshpoleDuke Eye Center, Durham, North Carolina, USA.
Joan KalnitskyDuke Eye Center, Durham, North Carolina, USA.
Joseph M SherwoodBioengineering, Imperial College London, London, UK.
Darryl R OverbyBioengineering, Imperial College London, London, UK.ORCID http://orcid.org/0000-0001-9894-7515
W Daniel StamerDuke Eye Center, Durham, North Carolina, USA. dan.stamer@duke.edu.
Imperial College London · GBDuke University · US

Funding

VISION RESEARCHP30EY005722 · NEI · DUKE UNIVERSITY · PI Vadim Y Arshavsky · 1985 to 2026
$19.3M
eNOS-Dependent Mechanoregulation of Intraocular PressureR01EY022359 · NEI · DUKE UNIVERSITY · PI STAMER, W DANIEL · 2012 to 2025
$5.6M
NEI NIH HHS P30 EY005722NEI NIH HHS R01 EY022359
6 · The paper itself

Abstract

Elevated intraocular pressure (IOP) narrows Schlemm's canal (SC), theoretically increasing luminal shear stress. Using engineered adenoviruses containing a functional fragment of the shear-responsive endothelial nitric oxide synthase (eNOS) promoter, we tested effects of shear stress and elevated flow rate on reporter expression in vitro and ex vivo. Cultured human umbilical vein endothelial cells (HUVECs) and SC cells were transduced with adenovirus containing eNOS promoter driving secreted alkaline phosphatase (SEAP) or green fluorescent protein (GFP) and subjected to shear stress. In parallel, human anterior segments were perfused under controlled flow. After delivering adenoviruses to the SC lumen by retroperfusion, the flow rate in one anterior segment of pair was increased to double pressure. In response to high shear stress, HUVECs and SC cells expressed more SEAP and GFP than control. Similarly, human anterior segments perfused at higher flow rates released significantly more nitrites and SEAP into perfusion effluent, and SC cells expressed increased GFP near collector channel ostia compared to control. These data establish that engineered adenoviruses have the capacity to quantify and localize shear stress experienced by endothelial cells. This is the first in situ demonstration of shear-mediated SC mechanobiology as a key IOP-sensing mechanism necessary for IOP homeostasis.

Indexed as

Intraocular PressureMechanotransduction, CellularAdenoviridaeAgedAlkaline PhosphataseAqueous HumorFemaleGreen Fluorescent ProteinsHumansHuman Umbilical Vein Endothelial CellsMaleNitric Oxide Synthase Type IIINitritesPromoter Regions, GeneticStress, MechanicalTrabecular MeshworkAlkaline PhosphataseGreen Fluorescent ProteinsNitric Oxide Synthase Type IIINitrites

Identifiers

PMID32242066
PMCPMC7118084
OpenAlexW3014285079

What OpenQuestion holds

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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.