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Nature Protocols 1, 2185–2194 (1 December 2006) | doi:10.1038/nprot.2006.398

An isothermal primer extension method for whole genome amplification of fresh and degraded DNA: applications in comparative genomic hybridization, genotyping and mutation screening

Cheryl I P Lee , Siew Hong Leong , Adrian E H Png , Keng Wah Choo , Christopher Syn , Dennis T H Lim , Hai Yang Law & Oi Lian Kon

We describe a protocol that uses a bioinformatically optimized primer in an isothermal whole genome amplification (WGA) reaction. Overnight incubation at 37 |[deg]|C efficiently generates several hundred- to several thousand-fold increases in input DNA. The amplified product retains reasonably faithful quantitative representation of unamplified whole genomic DNA (gDNA). We provide protocols for applying this isothermal primer extension WGA protocol in three different techniques of genomic analysis: comparative genomic hybridization (CGH), genotyping at simple tandem repeat (STR) loci and screening for single base mutations in a common monogenic disorder, β-thalassemia. gDNA extracted from formalin-fixed paraffin-embedded (FFPE) tissues can also be amplified with this protocol.