CCT241161 is an orally active pan-RAF inhibitor, with IC50 values of 3, 6, 10, 15, and 30 nM for LCK, CRAF, SRC, V600E-BRAF, and BRAF, respectively. It displays significant activity against BRAF and NRAS mutant melanomas, as well as demonstrating anticancer cell proliferative effects [1].

CCT241161 demonstrated broad-spectrum efficacy across various concentrations and exposure times in inhibiting key cellular targets and pathways involved in melanoma and other cancers. At nanomolar to micromolar concentrations (ranging from 0.1 μM to 100 μM), and incubation times from 4 hours to 20 days, CCT241161 effectively inhibited MEK and ERK in WM266.4 cells, BRAF V600E in Ba/F3 cells, and maintained its inhibitory activity against A375 cells without inducing drug resistance over a 20-day period. Additionally, CCT241161 suppressed BRAF-inhibitor-resistant melanoma cells, demonstrated anti-proliferative activity in D04 cells, and inhibited MEK in NRAS mutant cells. Cell viability and proliferation assays, along with Western Blot analysis, confirmed the compound's effectiveness in not only inhibiting key signaling molecules like MEK, ERK, and SRC in various cell lines, including those resistant to BRAF inhibitors but also in suppressing cell growth in NRAS mutant and BRAF mutant cell lines, showcasing its potential as a versatile anticancer agent.

CCT241161, administered at dosages of 10 and 20 mg/kg via oral gavage once daily for a period of seven days, effectively inhibits tumor growth in xenograft models of BRAF mutant A375, PLX4720-resistant A375, and NRAS mutant DO4 tumors in female nude mice aged 5 to 6 weeks without causing a reduction in body weight [1].