Journal article
Comparative Natural History of Visual Function From Patients With Biallelic Variants in BBS1 and BBS10
Investigative ophthalmology & visual science, Vol.62(15), pp.26-26
12/01/2021
DOI: 10.1167/iovs.62.15.26
PMID: 34940782
Abstract
The purpose of this study was to compare the natural history of visual function change in cohorts of patients affected with retinal degeneration due to biallelic variants in Bardet-Biedl syndrome genes: BBS1 and BBS10.
Patients were recruited from nine academic centers from six countries (Belgium, Canada, France, New Zealand, Switzerland, and the United States). Inclusion criteria were: (1) female or male patients with a clinical diagnosis of retinal dystrophy, (2) biallelic disease-causing variants in BBS1 or BBS10, and (3) measures of visual function for at least one visit. Retrospective data collected included genotypes, age, onset of symptoms, and best corrected visual acuity (VA). When possible, data on refractive error, fundus images and autofluorescence (FAF), optical coherence tomography (OCT), Goldmann kinetic perimetry (VF), electroretinography (ERG), and the systemic phenotype were collected.
Sixty-seven individuals had variants in BBS1 (n = 38; 20 female patients and 18 male patients); or BBS10 (n = 29; 14 female patients and 15 male patients). Missense variants were the most common type of variants for patients with BBS1, whereas frameshift variants were most common for BBS10. When ERGs were recordable, rod-cone dystrophy (RCD) was observed in 82% (23/28) of patients with BBS1 and 73% (8/11) of patients with BBS10; cone-rod dystrophy (CORD) was seen in 18% of patients with BBS1 only, and cone dystrophy (COD) was only seen in 3 patients with BBS10 (27%). ERGs were nondetectable earlier in patients with BBS10 than in patients with BBS1. Similarly, VA and VF declined more rapidly in patients with BBS10 compared to patients with BBS1.
Retinal degeneration appears earlier and is more severe in BBS10 cases as compared to those with BBS1 variants. The course of change of visual function appears to relate to genetic subtypes of BBS.
Details
- Title: Subtitle
- Comparative Natural History of Visual Function From Patients With Biallelic Variants in BBS1 and BBS10
- Creators
- Monika K Grudzinska Pechhacker - University of TorontoSamuel G Jacobson - University of PennsylvaniaArlene V Drack - University of IowaMatteo Di Scipio - Hospital for Sick ChildrenIne Strubbe - Ghent University HospitalWanda Pfeifer - University of IowaJacque L Duncan - University of California, San FranciscoHelene Dollfus - UMRS_1112, IGMA ( Institut de génétique Médicale d'Alsace ) Université de Strasbourg, Strasbourg, FranceNathalie Goetz - UMRS_1112, IGMA ( Institut de génétique Médicale d'Alsace ) Université de Strasbourg, Strasbourg, FranceJean Muller - Hôpitaux Universitaires de StrasbourgAndrea L Vincent - Auckland District Health BoardTomas S Aleman - Children's Hospital of PhiladelphiaAnupreet Tumber - Hospital for Sick ChildrenCaroline Van Cauwenbergh - Ghent University HospitalElfride De Baere - Ghent University HospitalEmma Bedoukian - Children's Hospital of PhiladelphiaBart P Leroy - Children's Hospital of PhiladelphiaJason T Maynes - Hospital for Sick ChildrenFrancis L Munier - Fondation Asile des AveuglesErika Tavares - Hospital for Sick ChildrenEman Saleh - Hospital for Sick ChildrenAjoy Vincent - Hospital for Sick ChildrenElise Heon - Hospital for Sick Children
- Resource Type
- Journal article
- Publication Details
- Investigative ophthalmology & visual science, Vol.62(15), pp.26-26
- DOI
- 10.1167/iovs.62.15.26
- PMID
- 34940782
- NLM abbreviation
- Invest Ophthalmol Vis Sci
- ISSN
- 1552-5783
- eISSN
- 1552-5783
- Language
- English
- Date published
- 12/01/2021
- Academic Unit
- Stead Family Department of Pediatrics; Ophthalmology and Visual Sciences
- Record Identifier
- 9984204059902771
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