Candidate Gene Discovery in Hereditary Colorectal Cancer and Polyposis Syndromes-Considerations for Future Studies.
Iris B A W Te PaskeMarjolijn J L LigtenbergNicoline HoogerbruggeRicharda M de VoerPublished in: International journal of molecular sciences (2020)
To discover novel high-penetrant risk loci for hereditary colorectal cancer (hCRC) and polyposis syndromes many whole-exome and whole-genome sequencing (WES/WGS) studies have been performed. Remarkably, these studies resulted in only a few novel high-penetrant risk genes. Given this observation, the possibility and strategy to identify high-penetrant risk genes for hCRC and polyposis needs reconsideration. Therefore, we reviewed the study design of WES/WGS-based hCRC and polyposis gene discovery studies (n = 37) and provide recommendations to optimize discovery and validation strategies. The group of genetically unresolved patients is phenotypically heterogeneous, and likely composed of distinct molecular subtypes. This knowledge advocates for the screening of a homogeneous, stringently preselected discovery cohort and obtaining multi-level evidence for variant pathogenicity. This evidence can be collected by characterizing the molecular landscape of tumors from individuals with the same affected gene or by functional validation in cell-based models. Together, the combined approach of a phenotype-driven, tumor-based candidate gene search might elucidate the potential contribution of novel genetic predispositions in genetically unresolved hCRC and polyposis.
Keyphrases
- genome wide
- copy number
- genome wide identification
- small molecule
- chronic rhinosinusitis
- dna methylation
- case control
- high throughput
- end stage renal disease
- genome wide analysis
- single cell
- healthcare
- transcription factor
- chronic kidney disease
- newly diagnosed
- peritoneal dialysis
- prognostic factors
- gene expression
- mesenchymal stem cells
- cystic fibrosis
- risk assessment
- biofilm formation
- human health