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2015 ; 1
(3
): 210-223
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Optimizing cancer genome sequencing and analysis
#MMPMID26645048
Griffith M
; Miller CA
; Griffith OL
; Krysiak K
; Skidmore ZL
; Ramu A
; Walker JR
; Dang HX
; Trani L
; Larson DE
; Demeter RT
; Wendl MC
; McMichael JF
; Austin RE
; Magrini V
; McGrath SD
; Ly A
; Kulkarni S
; Cordes MG
; Fronick CC
; Fulton RS
; Maher CA
; Ding L
; Klco JM
; Mardis ER
; Ley TJ
; Wilson RK
Cell Syst
2015[Sep]; 1
(3
): 210-223
PMID26645048
show ga
Tumors are typically sequenced to depths of 75-100× (exome) or 30-50× (whole
genome). We demonstrate that current sequencing paradigms are inadequate for
tumors that are impure, aneuploid or clonally heterogeneous. To reassess optimal
sequencing strategies, we performed ultra-deep (up to ~312×) whole genome
sequencing (WGS) and exome capture (up to ~433×) of a primary acute myeloid
leukemia, its subsequent relapse, and a matched normal skin sample. We tested
multiple alignment and variant calling algorithms and validated ~200,000 putative
SNVs by sequencing them to depths of ~1,000×. Additional targeted sequencing
provided over 10,000× coverage and ddPCR assays provided up to ~250,000× sampling
of selected sites. We evaluated the effects of different library generation
approaches, depth of sequencing, and analysis strategies on the ability to
effectively characterize a complex tumor. This dataset, representing the most
comprehensively sequenced tumor described to date, will serve as an invaluable
community resource (dbGaP accession id phs000159).