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Target 5000: Target Capture Sequencing for Inherited Retinal Degenerations.

Target 5000: Target Capture Sequencing for Inherited Retinal Degenerations.
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Dockery A, Stephenson K, Keegan D, Wynne N, Silvestri G, Humphries P, Kenna PF, Carrigan M, Farrar GJ,


Dockery A, Stephenson K, Keegan D, Wynne N, Silvestri G, Humphries P, Kenna PF, Carrigan M, Farrar GJ, (click to view)

Dockery A, Stephenson K, Keegan D, Wynne N, Silvestri G, Humphries P, Kenna PF, Carrigan M, Farrar GJ,

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Genes 2017 11 038(11) pii E304
Abstract

There are an estimated 5000 people in Ireland who currently have an inherited retinal degeneration (IRD). It is the goal of this study, through genetic diagnosis, to better enable these 5000 individuals to obtain a clearer understanding of their condition and improved access to potentially applicable therapies. Here we show the current findings of a target capture next-generation sequencing study of over 750 patients from over 520 pedigrees currently situated in Ireland. We also demonstrate how processes can be implemented to retrospectively analyse patient datasets for the detection of structural variants in previously obtained sequencing reads. Pathogenic or likely pathogenic mutations were detected in 68% of pedigrees tested. We report nearly 30 novel mutations including three large structural variants. The population statistics related to our findings are presented by condition and credited to their respective candidate gene mutations. Rediagnosis rates of clinical phenotypes after genotyping are discussed. Possible causes of failure to detect a candidate mutation are evaluated. Future elements of this project, with a specific emphasis on structural variants and non-coding pathogenic variants, are expected to increase detection rates further and thereby produce an even more comprehensive representation of the genetic landscape of IRDs in Ireland.

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