Targeted next generation sequencing identifies clinically actionable mutations in patients with melanoma

    loading  Checking for direct PDF access through Ovid



Somatic sequencing of cancers has produced new insight into tumorigenesis, tumor heterogeneity, and disease progression, but the vast majority of genetic events identified are of indeterminate clinical significance. Here, we describe a NextGen sequencing approach to fully analyzing 248 genes, including all those of known clinical significance in melanoma. This strategy features solution capture of DNA followed by multiplexed, high-throughput sequencing and was evaluated in 31 melanoma cell lines and 18 tumor tissues from patients with metastatic melanoma. Mutations in melanoma cell lines correlated with their sensitivity to corresponding small molecule inhibitors, confirming, for example, lapatinib sensitivity inERBB4mutant lines and identifying a novel activating mutation ofBRAF. The latter event would not have been identified by clinical sequencing and was associated with responsiveness to aBRAFkinase inhibitor. This approach identified focal copy number changes ofPTENnot found by standard methods, such as comparative genomic hybridization (CGH). Actionable mutations were found in 89% of the tumor tissues analyzed, 56% of which would not be identified by standard-of-care approaches. This work shows that targeted sequencing is an attractive approach for clinical use in melanoma.

Related Topics

    loading  Loading Related Articles