ArQule Presents Results From Phase 1b Expansion Study of ARQ 092 at the 2015 European Cancer Conference

ArQule, Inc. ARQL today announced preliminary results for the ongoing phase 1b expansion study in oncology for ARQ 092, an orally available selective pan-AKT inhibitor. The results were presented at the 2015 ESMO European Cancer Congress on September 27th, 2015. Thus far 25 patients have been treated in the study, and four partial responses (PRs) have been observed. These include two patients with the AKT1 E17K mutation and one patient with the PIK3CA H1047R mutation. Mutation status for a fourth patient could not be determined. Of the four PRs, two were observed in follicular lymphoma, one in breast cancer and one in endometrial cancer. The poster presentation can be accessed in the "Investor and Media" section of our website, www.arqule.com, under "Recent Data Presentations." The phase 1b study follows completion of the phase 1a dose escalation portion of the trial that enrolled 82 patients and tested various dosages and dose regimens. In the phase 1a trial after one PR was observed in a patient with chronic lymphocytic lymphoma, the study was expanded to phase 1b with a focus on lymphoma, endometrial cancer and tumors harboring AKT (AKT1 E17K) or PI3K (PIK3CA H1047R) mutations. "The preliminary results of the phase 1b expansion cohort are very encouraging," said Dr. Brian Schwartz, Head of Research and Development and Chief Medical Officer at ArQule. "The observation of four PRs in the 25 patients we have enrolled thus far validate our strategy to focus the trial on specific cancers with the AKT and PI3K mutations. We will continue to explore ARQ 092 in both cancer and rare diseases harboring these mutations." ArQule continues to enroll patients in the phase 1b study while assessing next steps for ARQ 092 in oncology. In parallel, ArQule collaborators at the National Institute of Health (NIH) received approval of the Investigational New Drug (IND) application to begin a phase 1 trial with ARQ 092 in Proteus syndrome, a rare disease that is caused by a mutation of the AKT1 gene.