Trametinib,871700-17-3,IC-0225095

Trametinib (GSK1120212, JTP-74057) is a second-generation small molecule inhibitor of MEK kinase. It functions as allosteric, ATP noncompetitive inhibitor with nanomolar activity against both MEK 1 and MEK 2 kinases with IC50 is 0.7-14.9 nM for MEK1/MEK2[3,7].

Trametinib (GSK1120212), identified as a potent p15INKb inducer, modulates p27KIP1, cyclin D1, cyclin A and c-Myc protein levels and induces G1 arrest in HT-29 cells[2]. Trametinib (GSK1120212) blocked tumor necrosis factor-α and interleukin-6 production from PBMCs. AIA and CIA development were suppressed almost completely by 0.1 mg/kg of JTP-74057 or 10 mg/kg of leflunomide. In the CIA, Trametinib (GSK1120212), but not leflunomide, suppressed collagen-reactive T-cell proliferation ex vivo[1]. Among the different cell lines evaluated in the study, those with either BRAFV600E mutation or activating mutations in KRAS or NRAS were the most sensitive.Trametinib (GSK1120212) inhibited the MEK1/2-dependent activating dual phosphorylation of ERK1/2 on both T202 and Y204[4].

In xenograft models of HT-29 and COLO205 colorectal tumor cell lines, trametinib demonstrated robust anticancer activity when administered daily for 14 days, Tumor growth was significantly suppressed in mice treated with 100 mg/kg Trametinib (GSK1120212) during the course of the treatment, by single oral dosing of 100 mg/kg Trametinib (GSK1120212), the phosphorylation of ERK1/2 in the established tumor tissues was completely inhibited, and both p15INK4b and p27KIP1 mRNA levels were upregulated in parallel[2,5]. In patients treated with Trametinib (GSK1120212)for malignant melanoma most common adverse events observed were rash, diarrhea, peripheral edema, fatigue, and dermatitis acneiform[6].