MEKINIST is a kinase inhibitor indicated as a single agent for the treatment of BRAF-inhibitor treatment-naive patients with unresectable or metastatic melanoma with BRAF V600E or V600K mutations as detected by an FDA approved test.

...Histologically confirmed, Stage III unresectable (Stage IIIc) or metastatic (Stage IV) cutaneous melanoma which is also determined to be BRAF V600E/K mutation-positive by the central laboratory. ...

Key eligibility criteria included metastatic cutaneous BRAF-mutant melanoma (amended later to allow BRAF V600E, V600K, or V600D mutations only)...cohort A (n = 40), there were no confirmed objective responses and 11 patients (28%) with stable disease (SD); the median progression-free survival (PFS) was 1.8 months. In cohort B (n = 57), there was one (2%) complete response, 13 (23%) partial responses (PRs), and 29 patients (51%) with SD (confirmed RR, 25%); the median PFS was 4.0 months....Trametinib was well tolerated.