Evidence map›Paper›PMID 21220561›Full record

ArticleInvestigative ophthalmology & visual science2011

Elastic modulus determination of normal and glaucomatous human trabecular meshwork.

Julie A Last, Tingrui Pan, Yuzhe Ding, Christopher M Reilly, Kate Keller, Ted S Acott, Michael P Fautsch, Christopher J Murphy, Paul Russell

Abstract readComparative Study
In one paragraph

Article in Investigative ophthalmology & visual science, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 254 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
254citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

254 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  17. Targeting the Glutaminolysis Pathway in Glaucoma-Associated Fibrosis.International journal of molecular sciences · 2025
    Review
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194 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors.

Julie A LastDepartment of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin, USA.
Tingrui Pan
Yuzhe Ding
Christopher M Reilly
Kate Keller
Ted S Acott
Michael P Fautsch
Christopher J Murphy
Paul Russell

Funding

Proteomics CoreP30EY010572 · NEI · OREGON HEALTH & SCIENCE UNIVERSITY · PI KIRSTEN Jeanne LAMPI · 1995 to 2026
$19.4M
BIOLOGY OF TRABECULAR RESPONSE TO LASER TRABECULOPLASTYR01EY008247 · NEI · OREGON HEALTH & SCIENCE UNIVERSITY · PI ACOTT, TED S · 1989 to 2017
$7.7M
CELLULAR BIOLOGY OF THE TRABECULAR MESHWORKR01EY007065 · NEI · MAYO CLINIC ROCHESTER · PI FAUTSCH, MICHAEL P. · 1987 to 2010
$5.8M
VERTEBRATE EYE: STUDIES OF AQUEOUS OUTFLOWR01EY003279 · NEI · OREGON HEALTH & SCIENCE UNIVERSITY · PI ACOTT, TED S · 1985 to 2012
$5.5M
Modulation of Signal Transduction by Nano-TopographyR01EY016134 · NEI · UNIVERSITY OF WISCONSIN-MADISON · PI MURPHY, CHRISTOPHER JOHN, THOMASY, SARA MICHELLE · 2006 to 2023
$5.1M
Intraocular pressure regulation via ATP-sensitive potassium channelsR01EY021727 · NEI · MAYO CLINIC ROCHESTER · PI FAUTSCH, MICHAEL P. · 2011 to 2021
$4.1M
Biophysical Cues and Corneal Wound HealingR01EY019970 · NEI · UNIVERSITY OF CALIFORNIA AT DAVIS · PI MURPHY, CHRISTOPHER JOHN · 2011 to 2020
$3.5M
Molecular Analysis of the Human Aqueous Outflow PathwayR01EY015736 · NEI · MAYO CLINIC ROCHESTER · PI FAUTSCH, MICHAEL P. · 2006 to 2010
$1.6M
Role of Biophysical Cues in the Pathogenesis of GlaucomaR01EY019475 · NEI · UNIVERSITY OF CALIFORNIA AT DAVIS · PI RUSSELL, PAUL · 2010 to 2013
$1.5M
REGULATING AAV-MEDIATED RETINAL TRANSGENE EXPRESSIONF32EY007065 · NEI · UNIVERSITY OF PENNSYLVANIA · PI DEJNEKA, NADINE S · 2000 to 2001
$80k
NCI NIH HHS 1R01CA133567-01NEI NIH HHS 5R01EY016134NEI NIH HHS EY003279NEI NIH HHS EY008247NEI NIH HHS EY010572NEI NIH HHS EY07065NEI NIH HHS EY15736NEI NIH HHS F32 EY007065NEI NIH HHS P30 EY010572NEI NIH HHS R01 EY003279NEI NIH HHS R01 EY007065NEI NIH HHS R01 EY008247NEI NIH HHS R01 EY015736NEI NIH HHS R01 EY016134NEI NIH HHS R01 EY019475NEI NIH HHS R01EY019475NEI NIH HHS R01 EY019970NEI NIH HHS R01 EY021727
6 · The paper itself

Abstract

purposeElevated intraocular pressure (IOP) is a risk factor for glaucoma. The principal outflow pathway for aqueous humor in the human eye is through the trabecular meshwork (HTM) and Schlemm's canal (SC). The junction between the HTM and SC is thought to have a significant role in the regulation of IOP. A possible mechanism for the increased resistance to flow in glaucomatous eyes is an increase in stiffness (increased elastic modulus) of the HTM. In this study, the stiffness of the HTM in normal and glaucomatous tissue was compared, and a mathematical model was developed to predict the impact of changes in stiffness of the juxtacanalicular layer of HTM on flow dynamics through this region.

methodsAtomic force microscopy (AFM) was used to measure the elastic modulus of normal and glaucomatous HTM. According to these results, a model was developed that simulated the juxtacanalicular layer of the HTM as a flexible membrane with embedded pores.

resultsThe mean elastic modulus increased substantially in the glaucomatous HTM (mean = 80.8 kPa) compared with that in the normal HTM (mean = 4.0 kPa). Regional variation was identified across the glaucomatous HTM, possibly corresponding to the disease state. Mathematical modeling suggested an increased flow resistance with increasing HTM modulus.

conclusionsThe data indicate that the stiffness of glaucomatous HTM is significantly increased compared with that of normal HTM. Modeling exercises support substantial impairment in outflow facility with increased HTM stiffness. Alterations in the biophysical attributes of the HTM may participate directly in the onset and progression of glaucoma.

Indexed as

AdultAgedAged, 80 and overElasticityElastic ModulusGlaucoma, Open-AngleHumansMicroscopy, Atomic ForceMiddle AgedModels, TheoreticalTrabecular Meshwork

Identifiers

PMID21220561
PMCPMC3080174

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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.