PGD and aneuploidy screening for 24 chromosomes by genome-wide SNP analysis: seeing the wood and the trees.
Bisignano et al. (2011) argue that, for preimplantation genetic diagnosis (PGD) of aneuploidy for all 24 chromosomes, microarray-based comparative genomic hybridization (array CGH) is superior to the use of single-nucleotide polymorphism (SNP) genotyping arrays. Published studies indicate that both technologies accurately detect aneuploidy of whole chromosomes or chromosome segments. However, given the extra theoretical resolution and parent-of-origin information provided by SNP-based approaches, these may be particularly suited to certain applications such as PGD of single-gene defects or translocation chromosome imbalance combined with comprehensive detection of aneuploidy. A consensus on how to validate aneuploidy testing and all other clinically relevant information resulting from genome-wide analysis is needed urgently.
London Bridge Fertility, Gynaecology and Genetics Centre, 1 St. Thomas Street, London SE1 9RY, UK. ahandyside@thebridgecentre.co.uk
Alan H
AH
Handyside
D000782:Aneuploidy; D005260:Female; D006801:Humans; D008297:Male; D011247:Pregnancy; D019836:Preimplantation Diagnosis / Q000379:methods*