Designation strengthens BIZENGRI® development program in rare cholangiocarcinoma

LEXINGTON, Mass. —February 5, 2026—Partner Therapeutics, Inc. (PTx), a privately held, fully integrated biotechnology company, today announced that the U.S. Food and Drug Administration (FDA) has granted Orphan Drug Designation (ODD) to zenocutuzumab‑zbco for the treatment of adults with advanced unresectable or metastatic cholangiocarcinoma. Zenocutuzumab-zbco is being developed in a subset of patients with cholangiocarcinoma harboring a neuregulin 1 (NRG1) gene fusion.

Cholangiocarcinoma (CCA) is a rare, aggressive malignancy of the bile ducts, typically ...