CytomX Therapeutics and Astellas Announce Strategic Collaboration to Develop Probody T-Cell Engaging Bispecific Therapies for Treatment of Cancer

      - Collaboration to Utilize CytomX’s Novel Probody Technology Platform for CD3 Bispecific Targets -
      - CytomX to Receive $80 Million Upfront Payment and
      Ability to Exercise Option for U.S. Co-Commercialization Rights -

SOUTH SAN FRANCISCO, Calif. and TOKYO, March 23, 2020 (GLOBE NEWSWIRE) -- CytomX Therapeutics, Inc. (NASDAQ: CTMX, President, Chief Executive Officer and Chairman: Sean McCarthy, D. Phil. “CytomX”) and Astellas Pharma Inc. (TSE: 4503, President and CEO: Kenji Yasukawa, Ph.D., “Astellas”) today announced they have entered into a strategic collaboration agreement focused on the discovery, research, development and commercialization of novel T-cell engaging bispecific antibodies targeting CD3 and tumor cell surface antigens for the treatment of cancer.  The parties will utilize CytomX’s Probody therapeutic technology platform, as well as its proprietary bispecific formats and CD3 modules.

“This collaboration with Astellas leverages CytomX’s deep expertise in targeting multiple antibody modalities to the tumor microenvironment,” said Sean McCarthy, D. Phil., President, Chief Executive Officer and Chairman of CytomX. “We are excited about the use of our technology to assist Astellas in unlocking the potential of T-cell engaging bispecifics in the treatment of solid tumors, building on the growing proof of concept we have established for our platform.”

“At Astellas, immuno-oncology is a Primary Focus of our research and development strategy, and we are working on the development of next-generation cancer immuno-therapy using new modalities/technologies,” stated Naoki Okamura, Representative Director Corporate Executive Vice President, Chief Strategy Officer and Chief Financial Officer, Astellas.“We look forward to the collaboration with CytomX, which will enable us to leverage both companies capabilities and expand our next-generation immuno-oncology therapeutic pipeline as we continue to dedicate our efforts to deliver innovative treatments for diseases with high unmet medical needs.”

Probody therapeutics are designed to remain inactive until they are activated by proteases in the tumor microenvironment. As a result, Probody therapeutics are designed to bind selectively to tumors and minimize binding to healthy tissue, thereby reducing toxicities and potentially creating safer, more effective therapies. Probody T-cell engaging bispecifics are antibody constructs capable of directing cytotoxic T-cells to tumor microenvironments, leading to cell-mediated anti-cancer activity.