Evidence map›Paper›PMID 30995299›Full record

ArticleInvestigative ophthalmology & visual science2019

The Role of Schlemm's Canal Endothelium Cellular Connectivity in Giant Vacuole Formation: A 3D Electron Microscopy Study.

Julia Lai, Yanfeng Su, David L Swain, Davy Huang, Dimitr Getchevski, Haiyan Gong

Abstract read
In one paragraph

Article in Investigative ophthalmology & visual science, 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
–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

20 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Mechanobiology in the eye.npj biological physics and mechanics · 2025
    Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Schlemm's canal: the outflow 'vessel'.Acta ophthalmologica · 2022
    Review
  14. Article
  15. Normal and glaucomatous outflow regulation.Progress in retinal and eye research · 2021
    Review
  16. Article
  17. Article
  18. Progress in the basic and clinical research on the Schlemm's canal.International journal of ophthalmology · 2020
    Review
  19. Increased stiffness and flow resistance of the inner wall of Schlemm's canal in glaucomatous human eyes.Proceedings of the National Academy of Sciences of the United States of America · 2019
    Article
  20. Article
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

6 authors.

Julia LaiDepartment of Ophthalmology, Boston University School of Medicine, Boston, Massachusetts, United States.
Yanfeng SuDepartment of Ophthalmology, Boston University School of Medicine, Boston, Massachusetts, United States.
David L SwainDepartment of Ophthalmology, Boston University School of Medicine, Boston, Massachusetts, United States.
Davy HuangDepartment of Ophthalmology, Boston University School of Medicine, Boston, Massachusetts, United States.
Dimitr GetchevskiDepartment of Ophthalmology, Boston University School of Medicine, Boston, Massachusetts, United States.
Haiyan GongDepartment of Ophthalmology, Boston University School of Medicine, Boston, Massachusetts, United States.

Funding

The Mechanical Basis of Primary Open Angle GlaucomaR01EY019696 · NEI · NORTHWESTERN UNIVERSITY · PI FREDBERG, JEFFREY J, JOHNSON, MARK · 2009 to 2019
$7.6M
Cellular Physiology of the Aqueous Outflow PathwayR01EY022634 · NEI · BOSTON UNIVERSITY MEDICAL CAMPUS · PI GONG, HAIYAN · 2012 to 2020
$3.7M
NEI NIH HHS R01 EY019696NEI NIH HHS R01 EY022634
6 · The paper itself

Abstract

Purpose: We investigated whether cellular connectivity between Schlemm's canal (SC) inner wall (IW) endothelium, and juxtacanalicular connective tissue (JCT), and between IW endothelial cells, plays a role in giant vacuole (GV) and pore formation by comparing perfusion- and immersion-fixed eyes. Methods: Normal human donor eyes (n = 4) were either immersion-fixed (0 mm Hg) or perfusion-fixed (15 mm Hg). Trabecular meshwork near SC was imaged using serial block-face scanning electron microscopy. A total of 12 IW cells from each group were 3D-reconstructed from ∼7040 electron micrographs and compared. In each cell, connections between IW cells and JCT cells/matrix were quantified; IW/IW connectivity was measured by cell border overlap length. GV volume, density, shape, and intracellular and paracellular pores were analyzed. Results: The mean number of IW/JCT cell-cell connections per cell significantly decreased (P < 0.01) while the summed GV volume per cell significantly increased (P < 0.01) in perfusion-fixed eyes compared to immersion-fixed eyes. Intracellular pores were observed in 14.6% of GVs in perfusion-fixed eyes and not observed in immersion-fixed eyes. The mean IW/IW overlap length per cell decreased (P < 0.01), and paracellular pores were found only in regions where IW/IW connectivity was minimal (overlap length = 0 μm) in perfusion-fixed eyes and not observed in immersion-fixed eyes. Conclusions: Our data suggest that changes in IW/JCT connectivity may be an important factor in the formation of larger GVs, and decreased IW/IW connectivity may promote paracellular pore formation. Targeting the IW/JCT and IW/IW connectivity may therefore be a potential strategy to regulate outflow resistance and IOP. .

Indexed as

AdultAgedCell CommunicationConnective TissueEndotheliumHumansImage Processing, Computer-AssistedImaging, Three-DimensionalIntercellular JunctionsLimbus CorneaeMicroscopy, Electron, ScanningTissue DonorsTissue FixationTrabecular MeshworkVacuoles

Identifiers

PMID30995299
PMCPMC6736380

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.