Arvinas Inc., and Pfizer Inc., announce a global collaboration to develop and commercialize PROTAC Protein degrader ARV 471.

ARV 471 is currently in a Phase II dose expansion clinical trial for the treatment of patients with estrogen receptor (ER) positive / human epidermal growth factor receptor 2 (HER2) negative (ER+/HER2-) locally advanced or metastatic breast cancer.

Under the terms of the agreement, Pfizer will pay Arvinas $650 million upfront. Separately, Pfizer will make a $350 million equity investment in Arvinas. The companies will equally share worldwide development costs, commercialization expenses, and profits.

“This collaboration has the potential to be transformational, as it combines our leadership in targeted protein degradation with Pfizer’s global capabilities and deep expertise in breast cancer. This should significantly enhance and accelerate the development and potential commercialization of ARV 471 while also advancing Arvinas’ strategy of building a global, integrated biopharmaceutical company,” said John Houston, Ph.D., Chief Executive Officer at Arvinas. “We share Pfizer’s deep commitment to people with breast cancer and are thrilled to partner with them to develop this potentially best-in-class therapy. Despite advancements in oncology in recent years, considerable unmet need persists in the treatment of HR+ breast cancer. Together with Pfizer, we will deploy our PROTAC technology in an effort to help people with this devastating disease.”