Structural alterations from multiple displacement amplification of a human genome revealed by mate-pair sequencing

配对测序揭示人类基因组多重置换扩增引起的结构改变

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作者:Xiang Jiao, Magnus Rosenlund, Sean D Hooper, Christian Tellgren-Roth, Liqun He, Yutao Fu, Jonathan Mangion, Tobias Sjöblom

Abstract

Comprehensive identification of the acquired mutations that cause common cancers will require genomic analyses of large sets of tumor samples. Typically, the tissue material available from tumor specimens is limited, which creates a demand for accurate template amplification. We therefore evaluated whether phi29-mediated whole genome amplification introduces false positive structural mutations by massive mate-pair sequencing of a normal human genome before and after such amplification. Multiple displacement amplification led to a decrease in clone coverage and an increase by two orders of magnitude in the prevalence of inversions, but did not increase the prevalence of translocations. While multiple strand displacement amplification may find uses in translocation analyses, it is likely that alternative amplification strategies need to be developed to meet the demands of cancer genomics.

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