Evidence map›Paper›PMID 25528956›Full record

ArticleAmerican journal of ophthalmology2015

Ciliary neurotrophic factor for macular telangiectasia type 2: results from a phase 1 safety trial.

Emily Y Chew, Traci E Clemons, Tunde Peto, Ferenc B Sallo, Avner Ingerman, Weng Tao, Lawrence Singerman, Steven D Schwartz, Neal S Peachey, Alan C Bird and 1 more

Open access · greenAbstract readClinical Trial, Phase IMulticenter Study
In one paragraph

Article in American journal of ophthalmology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers.

0numbers the graph read from it
0cells of the map it votes in
44citing papers in PubMed
5.8field-weighted citation impact, top 3% 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

44 citing papers in PubMed, 84 citations in OpenAlex.

  1. Trial
  2. Trial
  3. Trial
  4. Macular telangiectasia type 2: An update.The Journal of international medical research · 2026
    Review
  5. Article
  6. Review
  7. Article
  8. Revakinagene Taroretcel: First Approval.Molecular diagnosis & therapy · 2025
    Review
  9. Article
  10. Article
  11. Relative Ellipsoid Zone Reflectivity in Macular Telangiectasia Type 2.Investigative ophthalmology & visual science · 2023
    Article
  12. Review
  13. Article
  14. Article
  15. Article
  16. Review
  17. Macular Telangiectasia Type 2: A Comprehensive Review.Clinical ophthalmology (Auckland, N.Z.) · 2022
    Review
  18. Chimeric Helper-Dependent Adenoviruses Transduce Retinal Ganglion Cells and Müller Cells in Human Retinal Explants.Journal of ocular pharmacology and therapeutics : the official journal of the Association for Ocular Pharmacology and Therapeutics · 2021
    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

11 authors at 8 institutions in 2 countries.

Emily Y ChewNational Eye Institute, National Institutes of Health, Bethesda, Maryland. Electronic address: echew@nei.nih.gov.
Traci E ClemonsThe EMMES Corporation, Rockville, Maryland.
Tunde PetoNational Institute of Health Research Biomedical Research Centre at Moorfields Eye Hospital National Health Service Foundation Trust and UCL Institute of Ophthalmology, London, United Kingdom.
Ferenc B SalloDepartment of Research and Development, Moorfields Eye Hospital, London, United Kingdom; University College London, Institute of Ophthalmology, London, United Kingdom.
Avner IngermanATIS Consultants, Scarsdale, New York.
Weng TaoNeurotech Pharmaceuticals, Cumberland, Rhode Island.
Lawrence SingermanRetina Associates of Cleveland, Cleveland, Ohio.
Steven D SchwartzUniversity of California Los Angeles, Los Angeles, California.
Neal S PeacheyCleveland Clinic, Department of Ophthalmology, Cleveland Ohio; Louis Stokes Cleveland VA Medical Center, Cleveland, Ohio.
Alan C BirdDepartment of Inherited Eye Disease, Moorfields Eye Hospital, London, United Kingdom.
MacTel-CNTF Research Group
University College London · GBCleveland Clinic · USEmmes (United States) · USMoorfields Eye Hospital · GBNational Institutes of Health · USNeurotech (United States) · USRetina Associates · USUniversity of California, Los Angeles · US

Funding

The Age-Related Eye Disease Study 2 (AREDS2)ZIAEY000485 · NEI · NATIONAL EYE INSTITUTE · PI CHEW, EMILY Y · 2009 to 2015
$990k
Intramural NIH HHS Z99 EY999999
6 · The paper itself

Abstract

purposeTo evaluate the safety and tolerability of intraocular delivery of ciliary neurotrophic factor (CNTF) using an encapsulated cell implant for the treatment of macular telangiectasia type 2.

designAn open-label safety trial conducted in 2 centers enrolling 7 participants with macular telangiectasia type 2.

methodsThe participant's more severely affected eye (worse baseline visual acuity) received the high-dose implant of CNTF. Patients were followed for a period of 36 months. The primary safety outcome was a change in the parameters of the electroretinogram (ERG). Secondary efficacy outcomes were changes in visual acuity, en face measurements of the optical coherence tomography of the disruption in the ellipsoid zone, and microperimetry when compared with baseline.

resultsThe ERG findings demonstrated a reduction in the amplitude of the scotopic b-wave in 4 participants 3 months after implantation (month 3). All parameters returned to baseline values by month 12 and remained so at month 36 with no clinical impact on dark adaptation. There was no change in visual acuity compared with baseline. The area of the defect as measured functionally by microperimetry and structurally by the en face OCT imaging of the ellipsoid zone loss appeared unchanged from baseline.

conclusionsThe intraocular delivery of CNTF in the encapsulated cell implant appeared to be safe and well tolerated in eyes with macular telangiectasia type 2. Further evaluation in a randomized controlled clinical trial is warranted to test for efficacy.

Indexed as

AgedAutoantibodiesCiliary Neurotrophic FactorDrug Delivery SystemsElectroretinographyEnzyme-Linked Immunosorbent AssayFemaleFluorescein AngiographyHumansIntravitreal InjectionsMaleMiddle AgedRetinaRetinal TelangiectasisTomography, Optical CoherenceVisual AcuityAutoantibodiesCiliary Neurotrophic Factor

Identifiers

PMID25528956
PMCPMC4361328
OpenAlexW2086763399

What OpenQuestion holds

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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.