IDa | BRAF | cKIT | NRAS | Other | Therapy | Radiographic response | ctDNA level analyzed? |
---|---|---|---|---|---|---|---|
01 | WT | WT | WT | Chr5: 1,295,228-9 | ipilimumab | Immune-related PR | Y |
GG > AA (TERT)b | |||||||
03 | 1799T > A | WT | NT | NT | BMS-936559 | PD | Y |
05 | WT | WT | WT | NT | ipilimumab | PD | N |
06 | WT | WT | WT | NT | BMS-936559 | PD | N |
07 | WT | WT | WT | NT | ipilimumab | PD | N |
08 | WT | WT | 182A > G | NT | BMS-936559 | PD | Y |
09 | WT | WT | WT | NT | BMS-936559 | PD | N |
10 | WT | WT | 181C > A | NT | ipilimumab | PD | Y |
11 | WT | WT | WT | Chr2: 29,551,215 | ipilimumab | CR | N |
C > T (ALK)b | |||||||
12 | WT | WT | NTc | NT | ipilimumab | PD | N |
Archived formalin-fixed, paraffin-embedded tumor specimens were analyzed for common, recurrent somatic sequence mutations in BRAF, cKIT, NRAS and TERT[19] using standardized pyrosequencing, melting curve analysis, or Sanger sequencing techniques, as previously described (Wood et. al., Science. 2007 Nov 16;318(5853):1108-13. and Parsons et. al., Science. 2008 Sep 26;321(5897):1807-12.). No mutation was detected in 5 of 10 patients. Previously reported mutations associated with melanoma (BRAF, NRAS, TERT) were found in 4 patients. For one subject (#11) whose tumor was found to be wild type for each of the above genes, whole exome sequencing analysis of tumor and normal samples was employed to identify tumor-specific (somatic) sequence and copy number alterations. (WT, wild type; NT, not tested; PR, partial response; PD, progressive disease; CR, complete response; apatient ID numbers are not sequential as 2 patients who died due to disease progression prior to completing their courses of therapy are not included in Table 1; bgenomic position, hg19; cNo PCR amplified product was obtained after repeated attempts).