Evidence map›Paper›PMID 28973369›Full record

ArticleInvestigative ophthalmology & visual science2017

Alterations in Corneal Sensory Nerves During Homeostasis, Aging, and After Injury in Mice Lacking the Heparan Sulfate Proteoglycan Syndecan-1.

Sonali Pal-Ghosh, Gauri Tadvalkar, Mary Ann Stepp

Open access · goldAbstract read
In one paragraph

Article in Investigative ophthalmology & visual science, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
4.5field-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

21 citing papers in PubMed, 32 citations in OpenAlex.

  1. Article
  2. The Impact of Aging and Sex on Corneal Nerve Density and Function.Investigative ophthalmology & visual science · 2026
    Article
  3. Article
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  6. Review
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  14. Article
  15. Corneal pain and experimental model development.Progress in retinal and eye research · 2019
    Review
  16. Reduced Corneal Innervation in the CD25 Null Model of Sjögren Syndrome.International journal of molecular sciences · 2018
    Article
  17. Article
  18. Article
  19. Glycosylation pathways at the ocular surface.Biochemical Society transactions · 2018
    Review
  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

3 authors at 1 institution in 1 country.

Sonali Pal-GhoshDepartment of Anatomy and Regenerative Biology, The George Washington University Medical School, Washington, D.C., United States.
Gauri TadvalkarDepartment of Anatomy and Regenerative Biology, The George Washington University Medical School, Washington, D.C., United States.
Mary Ann SteppDepartment of Anatomy and Regenerative Biology, The George Washington University Medical School, Washington, D.C., United States.
George Washington University · US

Funding

Molecular mechanisms of corneal recurrent erosion formationR01EY008512 · NEI · SCHEPENS EYE RESEARCH INSTITUTE · PI STEPP, MARY ANN · 1990 to 2024
$11.7M
NEI NIH HHS R01 EY008512
6 · The paper itself

Abstract

Purpose: To determine the impact of the loss of syndecan 1 (SDC1) on intraepithelial corneal nerves (ICNs) during homeostasis, aging, and in response to 1.5-mm trephine and debridement injury. Methods: Whole-mount corneas are used to quantify ICN density and thickness over time after birth and in response to injury in SDC1-null and wild-type (WT) mice. High-resolution three-dimensional imaging is used to visualize intraepithelial nerve terminals (INTs), axon fragments, and lysosomes in corneal epithelial cells using antibodies against growth associated protein 43 (GAP43), βIII tubulin, and LAMP1. Quantitative PCR was performed to quantify expression of SDC1, SDC2, SDC3, and SDC4 in corneal epithelial mRNA. Phagocytosis was assessed by quantifying internalization of fluorescently labeled 1-μm latex beads. Results: Intraepithelial corneal nerves innervate the corneas of SDC1-null mice more slowly. At 8 weeks, ICN density is less but thickness is greater. Apically projecting intraepithelial nerve terminals and lysosome-associated membrane glycoprotein 1 (LAMP1) are also reduced in unwounded SDC1-null corneas. Quantitative PCR and immunofluorescence studies show that SDC3 expression and localization are increased in SDC1-null ICNs. Wild-type and SDC1-null corneas lose ICN density and thickness as they age. Recovery of axon density and thickness after trephine but not debridement wounds is slower in SDC1-null corneas compared with WT. Experiments assessing phagocytosis show reduced bead internalization by SDC1-null epithelial cells. Conclusions: Syndecan-1 deficiency alters ICN morphology and homeostasis during aging, reduces epithelial phagocytosis, and impairs reinnervation after trephine but not debridement injury. These data provide insight into the mechanisms used by sensory nerves to reinnervate after injury.

Indexed as

AgingAnimalsAxonsCorneaCorneal InjuriesDisease Models, AnimalEpithelium, CornealHomeostasisMiceMice, Inbred BALB CNerve FibersSyndecan-1SyndecansSyndecan-1Syndecans

Identifiers

PMID28973369
PMCPMC5627677
OpenAlexW2761995031

What OpenQuestion 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 OpenQuestion graph.