Seattle Genetics acquires Cascadian Therapeutics for $614m

Roivant and iNtRON Bio sign global licensing deal worth $667.5m
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Seattle Genetics has snapped up Cascadian Therapeutics in a $614 million deal that enhances the company’s oncology pipeline.

Cascadian Therapeutics’ most advanced program is tucatinib, an investigational oral, small molecule tyrosine kinase inhibitor (TKI) that is highly selective for HER2, a growth factor receptor that is overexpressed in multiple cancers, including breast, colorectal, ovarian and gastric.

Tucatinib is currently being evaluated in a randomized global pivotal trial called HER2CLIMB for patients with HER2-positive (HER2+) metastatic breast cancer, including patients with or without brain metastases.

It has been evaluated as a single agent and in combination with both chemotherapy and other HER2-directed agents including Herceptin (trastuzumab) and Kadcyla (trastuzumab emtansine).

Results from phase 1b trials showed that the combination of tucatinib, capecitabine and trastuzumab was generally well-tolerated and demonstrated clinical activity in patients with and without brain metastases.

The data support the ongoing pivotal trial and the potential role of tucatinib in earlier lines of metastatic breast cancer.

“This acquisition would enhance our late-stage clinical pipeline with a potentially best-in-class, orally available and highly selective TKI for patients with HER2-positive metastatic breast cancer,” said Clay Siegall, President and CEO of Seattle Genetics.

“Tucatinib would complement our existing pipeline of targeted cancer therapies, provide a third late-stage opportunity for a commercial product in solid tumors and expand our global efforts in breast cancer.

“It also leverages our broad expertise and resources to advance and expand the tucatinib program for patients.

“Beyond breast cancer, we believe there may be opportunities for tucatinib in other tumour types, such as HER2-positive metastatic colorectal cancer. Cascadian’s pipeline also includes a preclinical immuno-oncology agent.”