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Title: | Improved diagnosis of rare disease patients through systematic detection of runs of homozygosity |
Author: | Matalonga Borrel, Lesley Laurie, Steven Papakonstantinou, Anastasios Piscia, Davide Mereu, Elisabetta Bullich, Gemma Thompson, Rachel Horvath, Rita Pérez Jurado, Luis Riess, Olaf Gut, Ivo van Ommen, Gert Jan Lochmüller, Hanns Beltrán, Sergi RD-Connect Genome-Phenome Analysis Platform and UR Cormand Rifà, Bru Balcells Comas, Susana Grinberg Vaisman, Daniel Raúl Urreizti, Roser Garrabou Tornos, Glòria |
Keywords: | Malalties hereditàries Endogàmia i exogàmia Consanguinitat Genetic diseases Endogamy and exogamy Consanguinity |
Issue Date: | 1-Sep-2020 |
Publisher: | American Society for Investigative Pathology and the Association for Molecular Pathology |
Abstract: | Autozygosity is associated with an increased risk of genetic rare disease, thus being a relevant factor for clinical genetic studies. More than 2400 exome sequencing data sets were analyzed and screened for autozygosity on the basis of detection of >1 Mbp runs of homozygosity (ROHs). A model was built to predict if an individual is likely to be a consanguineous offspring (accuracy, 98%), and probability of consanguinity ranges were established according to the total ROH size. Application of the model resulted in the reclassification of the consanguinity status of 12% of the patients. The analysis of a subset of 79 consanguineous cases with the Rare Disease (RD)-Connect Genome-Phenome Analysis Platform, combining variant filtering and homozygosity mapping, enabled a 50% reduction in the number of candidate variants and the identification of homozygous pathogenic variants in 41 patients, with an overall diagnostic yield of 52%. The newly defined consanguinity ranges provide, for the first time, specific ROH thresholds to estimate inbreeding within a pedigree on disparate exome sequencing data, enabling confirmation or (re)classification of consanguineous status, hence increasing the efficiency of molecular diagnosis and reporting on secondary consanguinity findings, as recommended by American College of Medical Genetics and Genomics guidelines |
Note: | Reproducció del document publicat a: https://doi.org/10.1016/j.jmoldx.2020.06.008 |
It is part of: | Journal of Molecular Diagnostics, 2020, vol. 22, num. 9, p. 1205-1215 |
URI: | http://hdl.handle.net/2445/174442 |
Related resource: | https://doi.org/10.1016/j.jmoldx.2020.06.008 |
ISSN: | 1525-1578 |
Appears in Collections: | Articles publicats en revistes (Genètica, Microbiologia i Estadística) |
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