title: Designing a high-throughput somatic mutation profiling panel specifically for gynaecological cancers.
abstract: Somatic mutations play a major role in tumour initiation and progression. The mutation status of a tumour may predict prognosis and guide targeted therapies. The majority of techniques to study oncogenic mutations require high quality and quantity DNA or are analytically challenging. Mass-spectrometry based mutation analysis however is a relatively simple and high-throughput method suitable for formalin-fixed, paraffin-embedded (FFPE) tumour material. Targeted gene panels using this technique have been developed for several types of cancer. These current cancer hotspot panels are not focussed on the genes that are most relevant in gynaecological cancers. In this study, we report the design and validation of a novel, mass-spectrometry based panel specifically for gynaecological malignancies and present the frequencies of detected mutations. Using frequency data from the online Catalogue of Somatic Mutations in Cancer, we selected 171 somatic hotspot mutations in the 13 most important genes for gynaecological cancers, being BRAF, CDKN2A, CTNNB1, FBXW7, FGFR2, FGFR3, FOXL2, HRAS, KRAS, NRAS, PIK3CA, PPP2R1A and PTEN. A total of 546 tumours (205 cervical, 227 endometrial, 89 ovarian, and 25 vulvar carcinomas) were used to test and validate our panel, and to study the prevalence and spectrum of somatic mutations in these types of cancer. The results were validated by testing duplicate samples and by allele-specific qPCR. The panel presented here using mass-spectrometry shows to be reproducible and high-throughput, and is usefull in FFPE material of low quality and quantity. It provides new possibilities for studying large numbers of gynaecological tumour samples in daily practice, and could be useful in guided therapy selection.
authors.affiliation: Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands; Department of Gynaecology, Leiden University Medical Center, Leiden, The Netherlands.
authors.forename: Vivian M
authors.initials: VM
authors.lastname: Spaans
authors.affiliation: Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands.
authors.forename: Marjolijn D
authors.initials: MD
authors.lastname: Trietsch
authors.affiliation: Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands.
authors.forename: Stijn
authors.initials: S
authors.lastname: Crobach
authors.affiliation: Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands.
authors.forename: Ellen
authors.initials: E
authors.lastname: Stelloo
authors.affiliation: Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands.
authors.forename: Dennis
authors.initials: D
authors.lastname: Kremer
authors.affiliation: Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands.
authors.forename: Elisabeth M
authors.initials: EM
authors.lastname: Osse
authors.affiliation: Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands.
authors.forename: Natalja T ter
authors.initials: NT
authors.lastname: Haar
authors.affiliation: Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands.
authors.forename: Ronald
authors.initials: R
authors.lastname: van Eijk
authors.affiliation: Sequenom GmbH, Hamburg, Germany.
authors.forename: Susanne
authors.initials: S
authors.lastname: Muller
authors.affiliation: Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands.
authors.forename: Tom
authors.initials: T
authors.lastname: van Wezel
authors.affiliation: Department of Gynaecology, Leiden University Medical Center, Leiden, The Netherlands.
authors.forename: J Baptist
authors.initials: JB
authors.lastname: Trimbos
authors.affiliation: Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands.
authors.forename: Tjalling
authors.initials: T
authors.lastname: Bosse
authors.affiliation: Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands.
authors.forename: Vincent T H B M
authors.initials: VT
authors.lastname: Smit
authors.affiliation: Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands.
authors.forename: Gert Jan
authors.initials: GJ
authors.lastname: Fleuren
mesh_terms: D004252:DNA Mutational Analysis / Q000379:methods*; D005260:Female; D052138:Genes, Neoplasm; D005833:Genital Neoplasms, Female / Q000235:genetics*; D006801:Humans; D060885:Multiplex Polymerase Chain Reaction; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization