Fusion Pharmaceuticals Announces Clinical Collaboration with Merck to Evaluate Fusion’s Targeted Alpha Therapy (TAT) in Combination with Merck’s KEYTRUDA® (pembrolizumab) in Patients With Solid Tumors Expressing IGF-1R

Excerpt from the Press Release:

HAMILTON, ON and BOSTON, May 6, 2021 /PRNewswire/ — Fusion Pharmaceuticals Inc. (Nasdaq: FUSN), a clinical-stage oncology company focused on developing next-generation radiopharmaceuticals as precision medicines, today announced that it has entered into a clinical trial collaboration with a subsidiary of Merck (known as MSD outside the U.S. and Canada) to evaluate Fusion’s lead candidate, [²²⁵Ac]-FPI-1434 (FPI-1434), in combination with Merck’s anti-PD-1 (programmed death receptor-1) therapy, KEYTRUDA® (pembrolizumab), in patients with solid tumors expressing insulin-like growth factor 1 receptor (IGF-1R).

“With our strong preclinical data demonstrating promising activity with FPI-1434 and immuno-oncology agents, we believe we have an opportunity to improve efficacy in tumor indications where KEYTRUDA is approved, and to potentially expand into new tumor indications,” said Chief Executive Officer John Valliant, Ph.D. “This collaboration with Merck builds off our research on the mechanism of action of alpha radiation and aligns with our goal to expand the utility of radiopharmaceutical therapies, including advancing into earlier lines of cancer therapy.”

The planned Phase 1/2 combination trial will evaluate safety, tolerability and pharmacokinetics of FPI-1434 in combination with pembrolizumab and is expected to initiate approximately six to nine months after achieving the recommended Phase 2 dose in the ongoing Phase 1 study of FPI-1434 monotherapy. Under the terms of the agreement, Fusion will sponsor the study and Merck will supply KEYTRUDA.

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