Evidence map›Paper›PMID 22673847›Full record

ArticleCornea2012

Neurotrophins and nerve regeneration-associated genes are expressed in the cornea after lamellar flap surgery.

Shweta Chaudhary, Abed Namavari, Lisette Yco, Jin-Hong Chang, Snehal Sonawane, Vishakha Khanolkar, Joy Sarkar, Sandeep Jain

Open access · greenAbstract read
In one paragraph

Article in Cornea, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed
2.2field-weighted citation impact, top 13% 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

33 citing papers in PubMed, 55 citations in OpenAlex.

  1. Fenofibrate in ophthalmology: therapeutic efficacy and mechanisms.Journal of pharmacy & pharmaceutical sciences : a publication of the Canadian Society for Pharmaceutical Sciences, Societe canadienne des sciences pharmaceutiques · 2026
    Review
  2. Review
  3. Review
  4. A, B, C's of Trk Receptors and Their Ligands in Ocular Repair.International journal of molecular sciences · 2022
    Review
  5. Article
  6. Article
  7. Review
  8. Article
  9. Article
  10. PEDF Gene Deletion Disrupts Corneal Innervation and Ocular Surface Function.Investigative ophthalmology & visual science · 2021
    Article
  11. Article
  12. Review
  13. Article
  14. Article
  15. Review
  16. Corneal Innervation and Sensation: The Eye and Beyond.The Yale journal of biology and medicine · 2018
    Review
  17. Article
  18. Article
  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

8 authors at 1 institution in 1 country.

Shweta ChaudharyCorneal Neurobiology Laboratory, Department of Ophthalmology and Visual Sciences, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA.
Abed Namavari
Lisette Yco
Jin-Hong Chang
Snehal Sonawane
Vishakha Khanolkar
Joy Sarkar
Sandeep Jain
University of Illinois Chicago · US

Funding

Translational Core for Therapeutic and Diagnostic DevelopmentP30EY001792 · NEI · UNIVERSITY OF ILLINOIS AT CHICAGO · PI MCANANY, JAMES JASON · 1985 to 2025
$14.8M
Keratocyte role in guidance of corneal nervesK08EY018874 · NEI · UNIVERSITY OF ILLINOIS AT CHICAGO · PI JAIN, SANDEEP · 2009 to 2013
$1.4M
NEI NIH HHS EY001792NEI NIH HHS EY018874NEI NIH HHS K08 EY018874NEI NIH HHS P30 EY001792
6 · The paper itself

Abstract

purposeTo determine the in vivo expression of neurotrophins (NTs) and nerve regeneration-associated genes (RAGs) after surgically creating a hinged lamellar corneal flap in thy1-YFP mice.

methodsLamellar corneal flaps with multiple hinges were created in thy1-YFP mice. Mice were killed at weeks 2, 4, and 8. Quantitative polymerase chain reaction was performed to determine the expression of NTs and RAGs in the corneas after lamellar transection. Nerve growth factor (Ngf), brain-derived neurotrophic factor (Bdnf), glial cell-derived neurotrophic factor (Gdnf), neurotrophin 3, neurotrophin 5, small proline-rich repeat protein 1A (Sprr1a), growth-associated protein 43 (Gap43), and beta III tubulin (Tubb3) gene expressions were analyzed. Whole-mount confocal immunofluorescence and Western analyses were performed for localization and abundance of robustly expressed genes.

resultsSprouts of fine YFP-positive fronds emanating from transected (injured) nerve bundles were seen in the flap area at 2 weeks onward. Bdnf and Sprr1a were robustly and significantly expressed at 2 weeks postoperatively (>2-fold increase in expression; P<0.05). Bdnf localized to thy1-YFP+ cells in operated corneas. Sprr1a localized to corneal epithelial cell membranes. At 8 weeks, none of the NTs and RAGs had increased expression. Bdnf (ρ=0.73, P=0.001) and Sprr1a (ρ=0.76, P=0.001) showed a significant positive correlation with beta III tubulin.

conclusionsThe neurotrophin Bdnf and RAG Sprr1a are robustly and significantly expressed during corneal nerve regeneration in vivo.

Indexed as

Surgical FlapsAnimalsBlotting, WesternCorneaGene Expression RegulationMiceMicroscopy, ConfocalNerve Growth FactorsNerve RegenerationPolymerase Chain ReactionTrigeminal GanglionNerve Growth Factors

Identifiers

PMID22673847
PMCPMC3612527
OpenAlexW1965249774

What OpenQuestion holds

Textmetadata
LicenceTDM
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.