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Detecting PKD1 variants in Polycystic Kidney Disease patients by single-molecule long-read sequencing

ABSTRACT: A genetic diagnosis of autosomal dominant polycystic kidney disease (ADPKD) is challenging. However, long-read single-molecule sequencing has been shown to be a reliable alternative strategy that could overcome PKD1 complexities. Using long-read sequencing to characterize a cohort of 19 patients with ADPKD, we developed an approach that provided high sensitivity in identifying PKD1 pathogenic variants, with a diagnostic yield of 94.7%. Reliable screening of ADPKD patients in a single test without interference of PKD1 homologous sequences is now possible.

PROVIDER: EGAS00001002106 | EGA |

REPOSITORIES: EGA

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Polycystic Kidney Disease Progression Expression Analysis

Project description:Polycystic Kidney Disease (PKD) is a genetic disease of the kidney characterized by the gradual replacement of normal kidney parenchyma by fluid-filled cysts and fibrotic tissue. Autosomal Dominant Polycystic Kidney Disease (ADPKD) is caused by mutations in the PKD1 or PKD2 gene. Here we present an RNASeq experiment designed to investigate the effect of a kidney specific and Tamoxifen inducible knockout of the Pkd1 gene in mice. The Pkd1cko mice were harvested at different time points 2-weeks, 3-weeks, 5-weeks, 10.5-weeks, 11-weeks and 15-weeks after gene inactivation.

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2012-11-29 | E-GEOD-32586 | biostudies-arrayexpress

Detecting PKD1 variants in polycystic kidney disease patients by single-molecule long-read sequencing.

Project description: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.

| S-EPMC5488171 | biostudies-literature

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