Noninvasive prenatal detection of chromosomal aneuploidies using different next generation sequencing strategies and algorithms

Prenatal Diagnosis
Markus StummWera Hofmann

Abstract

Here we describe the successful application of massively parallel sequencing for noninvasive prenatal detection of trisomy 21. In addition, for the detection of a broader spectrum of fetal aneuploidies, a target enrichment approach was successfully tested. The circulating cell-free DNA was prepared from 53 maternal blood samples and analysed using Illumina's sequencing systems Genome Analyzer(IIx) and HiSeq2000, respectively. In a first experiment the SureSelect Target Enrichment System was tested. In our initial study analysing 42 samples on the Genome Analyzer(IIx) , all eight samples from women carrying a trisomy 21 fetus were correctly identified. On the basis of our HiSeq2000 sequence data, we discussed new algorithms for detection of fetal trisomy 21. In addition, we successfully used the combination of a target enrichment system followed by sequencing and were able to identify fetal trisomy 13 and fetal trisomy 21. Our results confirm previous reports that massively parallel sequencing of cell-free fetal DNA allows the reliably noninvasive detection of trisomy 21 from maternal blood with the potential to enhance test selectivity and specificity by bioinformatic means. According to our preliminary results, targeted sequen...Continue Reading

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Citations

Dec 18, 2013·Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz·M Stumm, M Entezami
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