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MabVax Therapeutics announces positive interim data from expanded cohort in phase 1 trial evaluating MVT-5873 in combination with first-line chemotherapy in pancreatic cancer

San Diego
Wednesday, February 14, 2018, 17:00 Hrs  [IST]

MabVax Therapeutics Holdings, a clinical-stage biotechnology company focused on the development of antibody-based products to address unmet medical needs in the treatment of cancer, announced positive interim results from the Company's ongoing phase 1 trial evaluating MVT-5873 in combination with standard of care chemotherapy in patients newly diagnosed with pancreatic and other CA19-9 positive malignancies. At the dose tested, all six patients in the cohort had meaningful reductions in tumor volume by RECIST.

In the phase 1 study, MabVax's MVT-5873, a fully human antibody, was given in combination with nab-paclitaxel and gemcitabine to patients newly diagnosed with CA19-9 positive pancreatic cancer. MVT-5873 at a dose of 0.125 mg/kg when added to first-line chemotherapy was generally well tolerated by all subjects. The Company reported that all six patients had measurable tumor reductions, with four patients meeting the criteria for partial response (PR) and two patients meeting the criteria for stable disease (SD). These results help confirm results reported from a group of patients treated earlier. Patient CA19-9 levels, which are a prognostic indicator of the disease state, were markedly reduced in all subjects with this combination therapy. The Company plans to enroll additional patients at this dose to further explore safety and potential response.

"We are highly encouraged by the continued positive response across all of the initial patients at this dose of MVT-5873.  We are enrolling additional patients at this dose level to confirm our early clinical results with a goal to determine if these clinically meaningful initial results can continue to be replicated in a larger patient population.  With additional confirmatory data, we could establish the potential of combining MVT-5873 with first line therapy in very difficult to treat cancer patients," commented David Hansen, MabVax's president and chief executive officer.

This phase 1 clinical trial is an open-label, multi-center nonrandomized study evaluating the safety and recommended phase 2 dose of MVT-5873 in combination with a standard of care chemotherapy in subjects with pancreatic and other CA19-9 positive malignancies. Secondary objectives include evaluating tumor response rate by RECIST 1.1, duration of response, and to determine pharmacokinetics. This study utilizes a conventional 3+3 design to identify the recommended Phase 2 dose. Dr. Eileen O'Reilly, Associate Director of the David M. Rubenstein Center for Pancreatic Cancer Research, attending physician, member at Memorial Sloan Kettering Cancer Center and Professor of Medicine at Weill Cornell Medical College is the lead investigator in the MVT-5873 phase 1 clinical trial.

 

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