Seattle Genetics and Astellas affiliate to co-develop second ADC

10 June 2011

US biotech group Seattle Genetics (Nasdaq: SGEN) says it has exercised an option to co-develop a second antibody-drug conjugate (ADC) under the company’s existing ADC collaboration with Agensys, which was acquired for $537 million in 2007 by Japanese drug major Astellas Pharma (Tokyo: 4503).

The ADC, known as ASG-22ME (formerly AGS-22M6E), targets the Nectin-4 antigen, which is expressed on multiple solid tumors. During the first quarter of 2011, Agensys submitted an Investigational New Drug application to the US Food and Drug Administration for a Phase I trial of ASG-22ME. Seattle Genetics and Agensys are also co-developing another ADC known as ASG-5ME, which is currently in Phase I clinical trials for pancreatic and prostate cancer.

Part of deal that could earn Seattle nearly $3 billion

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