Cited by 47Retinal Development and DisordersRetinal Diseases and TreatmentsGenomics and Rare Diseases

Inherited Retinal Diseases Due to RPE65 Variants: From Genetic Diagnostic Management to Therapy

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Aoun, Manar, Passerini, Ilaria, Chiurazzi, Pietro, Karali, Marianthi, De Rienzo, Irene, Sartor, Giovanna, Murro, Vittoria, Filimonova, Natalia +2 more·2021·International Journal of Molecular Sciences

Abstract

Inherited retinal diseases (IRDs) are a heterogeneous group of conditions that include retinitis pigmentosa (RP) and Leber congenital amaurosis (LCA) and early-onset severe retinal dystrophy (EO[S]RD), which differ in severity and age of onset. IRDs are caused by mutations in >250 genes. Variants in the RPE65 gene account for 0.6–6% of RP and 3–16% of LCA/EORD cases. Voretigene neparvovec is a gene therapy approved for the treatment of patients with an autosomal recessive retinal dystrophy due to confirmed biallelic RPE65 variants (RPE65-IRDs). Therefore, the accurate molecular diagnosis of RPE65-IRDs is crucial to identify ‘actionable’ genotypes—i.e., genotypes that may benefit from the treatment—and is an integral part of patient management. To date, hundreds of RPE65 variants have been identified, some of which are classified as pathogenic or likely pathogenic, while the significance of others is yet to be established. In this review, we provide an overview of the genetic diagnostic workup needed to select patients that could be eligible for voretigene neparvovec treatment. Careful clinical characterization of patients by multidisciplinary teams of experts, combined with the availability of next-generation sequencing approaches, can accelerate patients’ access to available therapeutic options.

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  • LCA and EOSRD are characterized by severe visual loss from birth or early infancy, wandering nystagmus, amaurotic pupils, and markedly reduced or non-recordable full-field electroretinograms.

    “LCA and EOSRD are characterized by severe visual loss from birth or early infancy, wandering nystagmus, amaurotic pupils, and markedly reduced or non-recordable full-field electroretinograms [112,113].”

    From The Role of Vitamin A in Retinal Diseases (2022) · cites this paper as [112]

  • Pathogenic variants in RPE65 account for approximately 3% to 16% of LCA and EOSRD patients.

    “Pathogenic variants in RPE65 gene account for approximately 3% to 16% of LCA and EOSRD patients [112].”

    From The Role of Vitamin A in Retinal Diseases (2022) · cites this paper as [112]

  • Most individuals with RPE65-related LCA/EOSRD are legally blind by the age of 40.

    “Most individuals are legally blind by the age of 40 [112].”

    From The Role of Vitamin A in Retinal Diseases (2022) · cites this paper as [112]

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Research works printed but not linked: 2

  1. [54]National Center for Biotechnology Information (NCBI) ClinVar Available online: https://www.ncbi.nlm.nih.gov/clinvar/?term=rpe65%5Bgene%5D (accessed on 5 January 2021)
  2. [60]Mahajan V. Bennett J. Maguire A.M. Haller J.A. Leroy B.P. Sohn E.H. Drack A.V. Yu Z.-F. Tillman A. Ciulla T.A. RPE65 Mutation subtype effects on baseline visual function and treatment response in phase 3 voretigene neparvovec trial Proceedings of the American Academy of Ophthalmology Meeting Chicago, IL, USA 27–30 October 2018

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Authors
Aoun, M., Passerini, I., Chiurazzi, P., Karali, M., De Rienzo, I., Sartor, G., Murro, V., Filimonova, N., Seri, M., & Banfi, S.
Affiliations
  • Novartis (Italy) (IT)
  • Azienda Ospedaliero-Universitaria Careggi (IT)
  • Università Cattolica del Sacro Cuore (IT)
  • University of Campania "Luigi Vanvitelli" (IT)
  • Department of Ophthalmology, AOU-Careggi, 50234 Florence, Italy
  • IRCCS Azienda Ospedliero-Universitaria di Bologna Policlinico di Sant'Orsola (IT)
  • Novartis (Switzerland) (CH)
Corresponding author
  • Seri, Marco
  • Banfi, Sandro
Venue
International Journal of Molecular Sciences
Publisher
MDPI AG
Published
2021-07-05
Volume
22
Issue
13
Pages
7207
ISSN
1422-0067 (ISSN-L)
OpenAlex
W3177509185
Cited by
47
References
79
Citations by year
2026: 11 · 2025: 7 · 2024: 3 · 2023: 13 · 2022: 10 · 2021: 3
FWCI
0.76
Type
journal article
Language
en
Open access
Locations
  • International Journal of Molecular Sciences (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Florence Research (University of Florence) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • Archivio Istituzionale della Ricerca - Università degli Studi della Campania "Luigi Vanvitelli" (submittedVersion)
  • PubliCatt (Università Cattolica del Sacro Cuore) (submittedVersion, other-oa)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
  • Health Sciences › Medicine › Ophthalmology › Retinal Diseases and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomics and Rare Diseases
Keywords
inherited retinal disease, retinitis pigmentosa, Leber congenital amaurosis, voretigene neparvovec, gene therapy, genetic diagnosis, pathogenic variant classification, patient selection, next-generation sequencing
MeSH terms
Retinoid Isomerohydrolase, Genetic Counseling, Genetic Testing, Genotype, Humans, Mutation, Retinal Diseases, Genetic Variation, Genetic Therapy, Eye Diseases, Hereditary, cis-trans-Isomerases

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