6533b83afe1ef96bd12a711a
RESEARCH PRODUCT
Retrotransposon insertions can initiate colorectal cancer and are associated with poor survival
Riku KatainenLauri A. AaltonenAri RistimäkiUlrika A. HänninenEsa PitkänenAurora TairaLinda M. ForsströmTomas TanskanenSelja KoskensaloNiko VälimäkiLaura Renkonen-sinisaloJohanna KondelinEevi KaasinenOuti KilpivaaraTeijo KuopioAnna LepistöJukka-pekka MecklinJan BöhmTatiana CajusoMervi AavikkoPäivi SuloKimmo PalinToni T. Seppäläsubject
0301 basic medicineMaleGenome instabilityMICROSATELLITE INSTABILITYHYPOMETHYLATIONCarcinogenesisColorectal cancergenetic processestransposonitGeneral Physics and AstronomyRetrotransposon02 engineering and technologyKaplan-Meier EstimateGenome0302 clinical medicineCancer genomicslcsh:ScienceGenetics0303 health sciencesGastrointestinal tractMultidisciplinaryQISLAND METHYLATOR PHENOTYPEGastroenterologyfood and beveragesgenomiikkaMiddle Aged021001 nanoscience & nanotechnology3. Good healthGene Expression Regulation NeoplasticCpG sitesyöpägeenit030220 oncology & carcinogenesisDNA methylationAllelic ImbalanceWHOLE-GENOMEFemaleSVA ELEMENTS0210 nano-technologyColorectal NeoplasmsScience3122 Cancersinformation scienceGenomicssuolistosyövätBiologyGeneral Biochemistry Genetics and Molecular BiologyArticleGenomic Instability03 medical and health sciencesCell Line TumormedicineHumansAged030304 developmental biologySOMATIC L1 RETROTRANSPOSITIONCpG Island Methylator PhenotypeGene Expression ProfilingfungiMicrosatellite instabilityGeneral ChemistryDNA Methylationmedicine.diseaseGENEMutagenesis Insertional030104 developmental biologyLong Interspersed Nucleotide ElementsCPGhealth occupationsCancer researchlcsh:QCpG Islands3111 BiomedicineCaco-2 Cellsdescription
Genomic instability pathways in colorectal cancer (CRC) have been extensively studied, but the role of retrotransposition in colorectal carcinogenesis remains poorly understood. Although retrotransposons are usually repressed, they become active in several human cancers, in particular those of the gastrointestinal tract. Here we characterize retrotransposon insertions in 202 colorectal tumor whole genomes and investigate their associations with molecular and clinical characteristics. We find highly variable retrotransposon activity among tumors and identify recurrent insertions in 15 known cancer genes. In approximately 1% of the cases we identify insertions in APC, likely to be tumor-initiating events. Insertions are positively associated with the CpG island methylator phenotype and the genomic fraction of allelic imbalance. Clinically, high number of insertions is independently associated with poor disease-specific survival.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-09-01 |