Study of HL-085 in Patients With Advanced Solid Tumor Tumors

The investigational product (IP) HL-085 is an adenosine triphosphate-noncompetitive mitogen activated protein kinase (MEK) inhibitor with a strong selective anti-tumor activity, with a much lower dose than selumetinib. It has been shown strong anti-tumor activities in preclinical studies to treat solid tumors, e.g., melanoma, non-small cell lung cancer, colon cancer and other malignancies with RAF and RAS mutations. Kechow has completed phase I dose escalation study to test HL-085 in patients with advanced NRAS mutated melanoma in China. The tested doses were 0.5 mg, 1mg, 2mg, 3mg, 4mg, 6mg, 9mg, 12mg, 15mg and 18mg BID oral administration and there was no dose-limiting toxicity (DLT) identified. All patients tolerated the study drug reasonably well. This study is a Phase I, open-label, dose escalation study to evaluate tolerability, safety, pharmacokinetic (PK) and preliminary antitumor activities of HL-085 in US patients with advanced solid tumors. The objective of the dose escalation is to evaluate safety and tolerability of selected TID and BID dose regimens in US patient population with advanced solid tumor and establish the Recommended Phase 2 Dose (RP2D). The starting dose for this trial is 12 mg daily oral administration. Three selected daily doses - 12 mg (4mg TID, 6mg BID), 18 mg (6mg TID, 9 mg BID), and 24 mg (8 mg TID, 12 mg BID) will be tested in this study to assess safety and tolerability of HL-085 at the 3 selected dose levels in US patient population with advanced solid tumors.