Novel somatic and germline mutations in cancer candidate genes in glioblastoma, melanoma, and pancreatic carcinoma.
A recent systematic sequence analysis of well-annotated human protein coding genes or consensus coding sequences led to the identification of 189 genes displaying somatic mutations in breast and colorectal cancers. Based on their mutation prevalence, a subset of these genes was identified as cancer candidate (CAN) genes as they could be potentially involved in cancer. We evaluated the mutational profiles of 19 CAN genes in the highly aggressive tumors: glioblastoma, melanoma, and pancreatic carcinoma. Among other changes, we found novel somatic mutations in EPHA3, MLL3, TECTA, FBXW7, and OBSCN, affecting amino acids not previously found to be mutated in human cancers. Interestingly, we also found a germline nucleotide variant of OBSCN that was previously reported as a somatic mutation. Our results identify specific genetic lesions in glioblastoma, melanoma, and pancreatic cancers and indicate that CAN genes and their mutational profiles are tumor specific. Some of the mutated genes, such as the tyrosine kinase EPHA3, are clearly amenable to pharmacologic intervention and could represent novel therapeutic targets for these incurable cancers. We also speculate that similar to other oncogenes and tumor suppressor genes, mutations affecting OBSCN could be involved in cancer predisposition.
Balakrishnan
Asha
A
Laboratory of Molecular Genetics, The Oncogenomics Center, Institute for Cancer Research and Treatment, University of Torino Medical School, Candiolo (TO) 10060, Italy.
Bleeker
Fonnet E
FE
Lamba
Simona
S
Rodolfo
Monica
M
Daniotti
Maria
M
Scarpa
Aldo
A
van Tilborg
Angela A
AA
Leenstra
Sieger
S
Zanon
Carlo
C
Bardelli
Alberto
A
D000328:Adult; D000368:Aged; D045744:Cell Line, Tumor; D005260:Female; D016147:Genes, Tumor Suppressor; D018095:Germ-Line Mutation; D005909:Glioblastoma / Q000235:genetics* / Q000473:pathology; D006801:Humans; D008297:Male; D008545:Melanoma / Q000235:genetics* / Q000473:pathology; D008875:Middle Aged; D009367:Neoplasm Staging; D009857:Oncogenes; D010190:Pancreatic Neoplasms / Q000235:genetics* / Q000473:pathology; D016133:Polymerase Chain Reaction