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AVEO Oncology Announces Presentation Of AV-203 Phase 1 Results At 2014 American Society Of Clinical Oncology Annual Meeting

AVEO Oncology (NASDAQ:AVEO) today announced the presentation of results from a first-in-human Phase 1 study of AV-203, AVEO’s ErbB3 (HER3) inhibitory antibody candidate. Among the results, the study established a recommended Phase 2 dose of AV-203, demonstrated good tolerability and promising early signs of activity, and reached the maximum planned dose of AV-203 monotherapy. The results were presented in a poster, entitled “First-in-human Phase 1 dose-escalation study of AV-203, a monoclonal antibody against ErbB3 in patients with metastatic or advanced solid tumors” (Abstract #11113, Poster #395, S Hall A2), at the Tumor Biology General Poster Session of the American Society of Clinical Oncology 2014 Annual Meeting, taking place May 30 - June 3, 2014, in Chicago.

“ErbB3 is a promising target for the treatment of a wide range of cancers, as it is both an important tumor survival pathway and may serve as a resistance mechanism for widely-used therapies targeting EGFR and HER2, among others,” stated Dr. John Sarantopoulos of the Institute for Drug Development, Cancer Therapy and Research Center at the University of Texas Health Science Center at San Antonio. “The results we see in this first-in-human study of AV-203 demonstrate good tolerability and an early signal of activity consistent with preclinical data showing the potential for neuregulin-1, the only known ligand for ErbB3, to serve as a biomarker predictive of AV-203 anti-tumor activity. These data provide a rationale for further investigation of AV-203 as novel anticancer therapy.”

A total of 22 patients were evaluated in the Phase 1, open-label, dose-escalation study. Objectives included safety, tolerability, dose limiting toxicities (DLT), maximum tolerated dose and/or recommended phase 2 dose in patients with advanced solid tumors. Evaluation of NRG-1 as a predictive biomarker was an exploratory objective. Patients received 2, 5, 9, 14, or 20 mg/kg of AV-203 intravenously once every 2 weeks (2 times per 28 day cycle). AV-203 was found to be generally safe and well-tolerated, with diarrhea and decreased appetite as the most common treatment-emergent and treatment-related adverse events (all grade). Across all doses of AV-203, there was a single DLT that occurred in an elderly patient at the lowest dose cohort (inability to tolerate study drug). The recommended Phase 2 dose was established at 20mg/kg intravenously every 2 weeks. No anti-drug antibodies were detected, and pharmacokinetic results indicated a dose-proportional increase in levels of AV-203.

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