Germline variants in the SEMA4A gene predispose to familial colorectal cancer type X

Familial colorectal cancer type X (FCCTX) is characterized by clinical features of hereditary non-polyposis colorectal cancer with a yet undefined genetic background. Here, using an integrative genomics strategy, we identify the SEMA4A p.Val78Met germline mutation in an Austrian kindred with FCCTX. Compared with wild-type protein, SEMA4AV78M demonstrates significantly increased MAPK/Erk and PI3K/Akt signaling as well as cell cycle progression of SEMA4A deficient HCT-116 colorectal cancer cells. In a cohort of 53 patients with FCCTX we depict two further SEMA4A mutations, p.Gly484Ala and p.Ser326Phe, and the single nucleotide polymorphism (SNP) p.Pro682Ser. This SNP is highly associated with the FCCTX phenotype exhibiting increased risk for colorectal cancer (OR 6.79, 95% CI 2.63 to 17.52). Our study shows previously unidentified germline variants in SEMA4A predisposing to FCCTX which has implications for surveillance strategies of patients and their families.

Type: Other
Archiver: European Genome-Phenome Archive (EGA)

2 Datasets 1 Publication

Click on a Dataset ID in the table below to learn more, and to find out who to contact about access to these data

Dataset ID	Description	Technology	Samples
EGAD00001001009	Exome sequencing of peripheral blood from 4 individuals of a family with familial colorectal cancer type X	Illumina HiSeq 2000	4
EGAD00001001010	Sequencing of colorectal tumors and normal tissue using Ion AmpliSeq Cancer Hotspot Panel V2	Ion Torrent Proton	8

Publications	Citations
Germline variants in the SEMA4A gene predispose to familial colorectal cancer type X. Schulz E, Klampfl P, Holzapfel S, Janecke AR, Ulz P, Renner W, Kashofer K, Nojima S, Leitner A, Zebisch A, Wölfler A, Hofer S, Gerger A, Lax S, Beham-Schmid C, Steinke V, Heitzer E, Geigl JB, Windpassinger C, Hoefler G, Speicher MR, Boland CR, Kumanogoh A, Sill H. Nat Commun 5: 2014 5191	38