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2014 ; 22
(11
): 1305-13
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Next-generation sequencing for the diagnosis of hereditary breast and ovarian
cancer using genomic capture targeting multiple candidate genes
#MMPMID24549055
Castéra L
; Krieger S
; Rousselin A
; Legros A
; Baumann JJ
; Bruet O
; Brault B
; Fouillet R
; Goardon N
; Letac O
; Baert-Desurmont S
; Tinat J
; Bera O
; Dugast C
; Berthet P
; Polycarpe F
; Layet V
; Hardouin A
; Frébourg T
; Vaur D
Eur J Hum Genet
2014[Nov]; 22
(11
): 1305-13
PMID24549055
show ga
To optimize the molecular diagnosis of hereditary breast and ovarian cancer
(HBOC), we developed a next-generation sequencing (NGS)-based screening based on
the capture of a panel of genes involved, or suspected to be involved in HBOC, on
pooling of indexed DNA and on paired-end sequencing in an Illumina GAIIx
platform, followed by confirmation by Sanger sequencing or MLPA/QMPSF. The
bioinformatic pipeline included CASAVA, NextGENe, CNVseq and Alamut-HT. We
validated this procedure by the analysis of 59 patients' DNAs harbouring SNVs,
indels or large genomic rearrangements of BRCA1 or BRCA2. We also conducted a
blind study in 168 patients comparing NGS versus Sanger sequencing or MLPA
analyses of BRCA1 and BRCA2. All mutations detected by conventional procedures
were detected by NGS. We then screened, using three different versions of the
capture set, a large series of 708 consecutive patients. We detected in these
patients 69 germline deleterious alterations within BRCA1 and BRCA2, and 4 TP53
mutations in 468 patients also tested for this gene. We also found 36 variations
inducing either a premature codon stop or a splicing defect among other genes:
5/708 in CHEK2, 3/708 in RAD51C, 1/708 in RAD50, 7/708 in PALB2, 3/708 in MRE11A,
5/708 in ATM, 3/708 in NBS1, 1/708 in CDH1, 3/468 in MSH2, 2/468 in PMS2, 1/708
in BARD1, 1/468 in PMS1 and 1/468 in MLH3. These results demonstrate the
efficiency of NGS in performing molecular diagnosis of HBOC. Detection of
mutations within other genes than BRCA1 and BRCA2 highlights the genetic
heterogeneity of HBOC.