Evidence map›Paper›PMID 28698241›Full record

ArticleThe British journal of ophthalmology2018

Longitudinal characterisation of function and structure of Bietti crystalline dystrophy: report on a novel homozygous mutation in

Catherine M Lockhart, Travis B Smith, Paul Yang, Malini Naidu, Allan E Rettie, Abhinav Nath, Richard Weleber, Edward J Kelly

Abstract readCase Reports
In one paragraph

Article in The British journal of ophthalmology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 1 pooled it
0.4field-weighted citation impact, top 37% 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

16 citing papers in PubMed, 1 synthesis or guideline pooled it, 26 citations in OpenAlex.

  1. Pooled it
  2. Bietti crystalline dystrophy in Türkiye: A genetic crossroads between Asia and Europe.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2026
    Article
  3. Article
  4. Observational
  5. Article
  6. Article
  7. Article
  8. Article
  9. Review
  10. Review
  11. A novel mutation ofInternational journal of ophthalmology · 2022
    Article
  12. [Generation and characterization ofBeijing da xue xue bao. Yi xue ban = Journal of Peking University. Health sciences · 2021
    Article
  13. Article
  14. Article
  15. Journal of current ophthalmology · 2019
    Article
  16. Current perspectives in Bietti crystalline dystrophy.Clinical ophthalmology (Auckland, N.Z.) · 2019
    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

8 authors at 2 institutions in 1 country.

Catherine M LockhartDepartment of Pharmaceutics, University of Washington, Seattle, Washington, USA.
Travis B SmithCasey Eye Institute, Oregon Health Sciences University, Portland, Oregon, USA.
Paul YangCasey Eye Institute, Oregon Health Sciences University, Portland, Oregon, USA.
Malini NaiduDepartment of Pharmaceutics, University of Washington, Seattle, Washington, USA.
Allan E RettieDepartment of Medicinal Chemistry, University of Washington, Seattle, Washington, USA.
Abhinav NathDepartment of Medicinal Chemistry, University of Washington, Seattle, Washington, USA.
Richard WeleberCasey Eye Institute, Oregon Health Sciences University, Portland, Oregon, USA.
Edward J KellyDepartment of Pharmaceutics, University of Washington, Seattle, Washington, USA.
University of Washington · USOregon Health & Science University · US

Funding

Transform Dissemination and Implementation Science in CTSA ProgramsUL1TR002319 · NCATS · UNIVERSITY OF WASHINGTON · PI John K. Amory · 2017 to 2026
$100.0M
Institute of Translational Health SciencesUL1TR000423 · NCATS · UNIVERSITY OF WASHINGTON · PI DISIS, MARY L. · 2012 to 2016
$49.4M
Proteomics CoreP30EY010572 · NEI · OREGON HEALTH & SCIENCE UNIVERSITY · PI John Peter Campbell · 1995 to 2026
$19.4M
Diversity Action Plan: UW GenOM ProjectR25HG007153 · NHGRI · UNIVERSITY OF WASHINGTON · PI EICHLER, EVAN · 2013 to 2020
$2.3M
Neuroprotective Mechanisms of Inosine Monophosphate Dehydrogenase Inhibitors in Retinitis PigmentosaK08EY026650 · NEI · OREGON HEALTH & SCIENCE UNIVERSITY · PI YANG, PAUL · 2016 to 2020
$1.1M
NCATS NIH HHS UL1 TR000423NCATS NIH HHS UL1 TR002319NEI NIH HHS K08 EY026650NEI NIH HHS P30 EY010572NHGRI NIH HHS R25 HG007153
6 · The paper itself

Abstract

backgroundBietti crystalline dystrophy (BCD) is a rare inherited disorder characterised by fine crystalline deposits in the corneal limbus and retinal posterior pole. In 2004, mutations in the

methodsAt regular intervals, the patient underwent repeat ophthalmic evaluations. DNA was extracted from buccal swabs, amplified by standard PCR and analysed for homology to the CYP4V2 sequence. Homology modelling was conducted using Iterative Threading ASSEmbly Refinement and molecular dynamics simulations using GROningen MAchine for Chemical Simulations.

resultsThe proband, a 47-year-old woman of German ancestry was diagnosed with crystalline retinopathy at age 25. Over the next 20 years, visual acuity and function gradually declined with progression of retinal pigment epithelium and choroidal atrophy. When first tested at 39 years of age, the multifocal electroretinogram (ERG) was markedly abnormal, more so for the right eye, whereas the full-field ERG was more symmetrical and lagged other measures of visual function. Gene sequencing showed a single C>T point mutation in exon 9 encoding a R400C amino acid change. Computational modelling suggests the mutation impairs function due to loss of a hydrogen bonding interaction with the propionate side chains of the haeme prosthetic group.

conclusionThis is the first report of a homozygous R400C mutation in CYP4V2 with protein modelling showing high likelihood of enzyme dysfunction. The comprehensive long-term clinical follow-up provides insight into disease progression and highlights possible anti-inflammatory modulation of disease severity.

Indexed as

ForecastingMutationCorneal Dystrophies, HereditaryCytochrome P450 Family 4DNADNA Mutational AnalysisElectroretinographyFemaleFluorescein AngiographyFollow-Up StudiesFundus OculiGenes, RecessiveHomozygoteHumansMiddle AgedPedigreeCYP4V2 protein, humanCytochrome P450 Family 4DNABietti crystalline dystrophyCYP4V2macular edemaprotein modeling

Identifiers

PMID28698241
PMCPMC6208130
OpenAlexW2736182778

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.