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Next-generation carrier screening. | LitMetric

AI Article Synopsis

Article Abstract

Purpose: Carrier screening for recessive Mendelian disorders traditionally employs focused genotyping to interrogate limited sets of mutations most prevalent in specific ethnic groups. We sought to develop a next-generation DNA sequencing-based workflow to enable analysis of a more comprehensive set of disease-causing mutations.

Methods: We utilized molecular inversion probes to capture the protein-coding regions of 15 genes from genomic DNA isolated from whole blood and sequenced those regions using the Illumina HiSeq 2000 (Illumina, San Diego, CA). To assess the quality of the resulting data, we measured both the fraction of the targeted region yielding high-quality genotype calls, and the sensitivity and specificity of those calls by comparison with conventional Sanger sequencing across hundreds of samples. Finally, to improve the overall accuracy for detecting insertions and deletions, we introduce a novel assembly-based approach that substantially increases sensitivity without reducing specificity.

Results: We generated high-quality sequence for at least 99.8% of targeted base pairs in samples derived from blood and achieved high concordance with Sanger sequencing (sensitivity >99.9%, specificity >99.999%). Our novel algorithm is capable of detecting insertions and deletions inaccessible by current methods.

Conclusion: Our next-generation DNA sequencing-based approach yields the accuracy and completeness necessary for a carrier screening test.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3918543PMC
http://dx.doi.org/10.1038/gim.2013.83DOI Listing

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