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Authors: Borràs, Daniel M and Vossen, Rolf H A M and Liem, Michael and Buermans, Henk P J and Dauwerse, Hans and van Heusden, Dave and Gansevoort, Ron T and den Dunnen, Johan T and Janssen, Bart and Peters, Dorien J M and Losekoot, Monique and Anvar, Seyed Yahya

A genetic diagnosis of autosomal-dominant polycystic kidney disease (ADPKD) is challenging due to allelic heterogeneity, high GC content, and homology of the PKD1 gene with six pseudogenes. Short-read next-generation sequencing approaches, such as whole-genome sequencing and whole-exome sequencing, often fail at reliably characterizing complex regions such as PKD1. However, long-read single-molecule sequencing has been shown to be an alternative strategy that could overcome PKD1 complexities and discriminate between homologous regions of PKD1 and its pseudogenes. In this study, we present the increased power of resolution for complex regions using long-read sequencing to characterize a cohort of 19 patients with ADPKD. Our approach provided high sensitivity in identifying PKD1 pathogenic variants, diagnosing 94.7% of the patients. We show that reliable screening of ADPKD patients in a single test without interference of PKD1 homologous sequences, commonly introduced by residual amplification of PKD1 pseudogenes, by direct long-read sequencing is now possible. This strategy can be implemented in diagnostics and is highly suitable to sequence and resolve complex genomic regions that are of clinical relevance. © 2017 The Authors. Human Mutation published by Wiley Periodicals, Inc.

Journal: Human mutation
DOI: 10.1002/humu.23223
Year: 2017

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