Cited by 33Retinal Development and DisordersRetinal Diseases and TreatmentsOcular Diseases and Behçet’s Syndrome

RDH5 -Related Fundus Albipunctatus in a Large Japanese Cohort

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Katagiri, Satoshi, Hayashi, Takaaki, Nakamura, Masaki, Mizobuchi, Kei, Gekka, Tamaki, Komori, Shiori, Ueno, Shinji, Terasaki, Hiroko +12 more·2020·Investigative Opthalmology & Visual Science

Abstract

Purpose: To investigate clinical characteristics of RDH5-related fundus albipunctatus (FAP) in a Japanese cohort. Methods: Twenty-five patients from 22 pedigrees with RDH5-related FAP were studied. Ophthalmic medical records were reviewed. For genetic analysis, either Sanger sequencing of the RDH5 gene or whole-exome sequencing was performed. Results: Genetic analysis identified eight different RDH5 variants, including seven known RDH5 variants (p.G35S, p.G107R, p.R167H, p.A240GfsX19, p.R278X, p.R280H, and p.L310delinsEV) and a novel variant: c.259C>T (p.Q87X). The most frequently observed variant was p.L310delinsEV (65.2%, 30/46 alleles). Of 50 eyes examined, 44 eyes (88.0%) showed logMAR best-corrected visual acuity (BCVA) of 0.10 or better. In optical coherence tomography, macular involvement was observed in 12 patients (24 eyes). Ten patients (83.3%) who had good BCVA (0.10 or better) exhibited diffuse disruption of the outer retina with foveal sparing, and two patients (16.7%) exhibited diffuse disruption throughout the macula and decreased BCVA. Among the 24 eyes, ring-or crescent-shaped hyperautofluorescence or irregular autofluorescence around the fovea was observed in 15 eyes (83.3%) of 18 eyes examined by fundus autofluorescence imaging. Full-field electroretinography showed extinguished or severely decreased rod responses in all 23 examined patients, whereas decreased cone responses were seen in 17 patients (73.9%). Conclusions: Multimodal imaging and electroretinography of RDH5-related FAP revealed high frequencies of macular involvement in older patients and decreased cone responses. Our findings suggest that progressive macular/cone dysfunction, as well as delayed rod function, may be key phenotypic features of RDH5-related FAP.

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  • Impaired 11-cis-retinal production leads to decreased A2E and lipofuscin formation, resulting in reduced autofluorescence in FAF images.

    “Impaired 11-cis-retinal production also leads to decreased A2E and lipofuscin formation, which results in reduced autofluorescence in FAF images [87,89,139,140,141].”

    From The Role of Vitamin A in Retinal Diseases (2022) · cites this paper as [140]

    The Discussion (Other Retinal Findings) links reduced FAF autofluorescence to decreased A2E and lipofuscin formation, but presents this as an inference due to impaired all-trans-retinal production or restricted photopigment turnover. The paper also says RDH5 dysfunction reduces 11-cis-retinal production; it does not establish the claim’s direct causal chain as fact. (LLM, conf=0.86)

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  1. [8]Fishman GA, Roberts MF, Derlacki DJ, et al. Novel mutations in the cellular retinaldehyde-binding protein gene (RLBP1) associated with retinitis punctata albescens: evidence of interfamilial genetic heterogeneity and fundus changes in heterozygotes. Arch Ophthalmol. 2004; 122: 70– 75. 14718298

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Authors
Katagiri, S., Hayashi, T., Nakamura, M., Mizobuchi, K., Gekka, T., Komori, S., Ueno, S., Terasaki, H., Sakuramoto, H., Kuniyoshi, K., Kusaka, S., Nagashima, R., Kondo, M., Fujinami, K., Tsunoda, K., Matsuura, T., Kondo, H., Yoshitake, K., Iwata, T., & Nakano, T.
Affiliations
  • Jikei University School of Medicine (JP)
  • Nagoya University (JP)
  • Kindai University Hospital (JP)
  • Mie University (JP)
  • Tokyo Medical Center (JP)
  • University of Occupational and Environmental Health Japan (JP)
Corresponding author
  • Katagiri, Satoshi
  • Hayashi, Takaaki
  • Nakamura, Masaki
  • Mizobuchi, Kei
  • Gekka, Tamaki
  • Komori, Shiori
  • Ueno, Shinji
  • Terasaki, Hiroko
  • Sakuramoto, Hiroyuki
  • Kuniyoshi, Kazuki
  • Kusaka, Shunji
  • Nagashima, Ryunosuke
  • Kondo, Mineo
  • Fujinami, Kaoru
  • Tsunoda, Kazushige
  • Matsuura, Tomokazu
  • Kondo, Hiroyuki
  • Yoshitake, Kazutoshi
  • Iwata, Takeshi
  • Nakano, Tadashi
Venue
Investigative Opthalmology & Visual Science
Published
2020-03-30
Volume
61
Issue
3
Pages
53
ISSN
  • 0146-0404 (ISSN-L)
  • 1552-5783
OpenAlex
W3013164178
Cited by
33
References
60
Citations by year
2026: 5 · 2025: 2 · 2024: 5 · 2023: 6 · 2022: 5 · 2021: 7 · 2020: 3
FWCI
1.70
Type
journal article
Language
en
Open access
Locations
  • Investigative Ophthalmology & Visual Science (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Funders
Japan Society for the Promotion of Science (19K09989, 17K11434, 17H06276)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
  • Health Sciences › Medicine › Ophthalmology › Retinal Diseases and Treatments
  • Health Sciences › Medicine › Ophthalmology › Ocular Diseases and Behçet’s Syndrome
Keywords
retinal degeneration, macular involvement, cone dysfunction, rod function, fundus autofluorescence, electroretinogram, genetic variants, Japanese patients
MeSH terms
Whole Genome Sequencing, Adolescent, Adult, Aged, Alcohol Oxidoreductases, Child, Electroretinography, Female, Humans, Japan, Male, Middle Aged, Pedigree, Retinal Diseases, Retrospective Studies, Visual Acuity, Retinal Rod Photoreceptor Cells, Retinal Cone Photoreceptor Cells, Tomography, Optical Coherence, Asian People, Young Adult, Multimodal Imaging

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