Phase 12a Study to Find the Best Dose and Test Safety of BNT329 in Adults With Advanced Solid Tumors Expressing CA19-9

What this Trial Is About

Researchers are evaluating the safety and optimal dose of BNT329, an investigational drug, in people with advanced solid tumors that express the tumor marker CA19-9. The study also aims to assess how well BNT329 works by measuring participant responses and how long the tumor remains stable without growth or spread. Additionally, the study will examine how BNT329 moves through and affects the body. The trial includes up to four parts. Parts A and B focus on increasing doses to study safety and tolerability in participants with various advanced cancers expressing CA19-9 who have not responded well to previous treatments. Part C may be added if safety or effectiveness concerns arise, involving pre-dosing with a CA19-9 targeting antibody before BNT329. Part D tests two selected dose levels in participants with pancreatic ductal adenocarcinoma PDAC who have received prior treatment. Treatment is given as intravenous infusions every 2 or 3 weeks depending on the study part. Participants undergo screening, followed by treatment for up to two years, an end-of-treatment visit, two safety follow-ups, and a survival follow-up until death, withdrawal, or study end. Throughout the study, researchers monitor side effects, dose adjustments, tumor response, and survival. Blood samples will be collected to study drug levels and immune responses. Safety and effectiveness will be assessed up to 36 months from first dose.

A Clinical Trial to Test if the Investigational Drug BNT329 is Safe and Potentially Beneficial for People With Advanced Solid Tumors Known to Express the Tumor Marker CA19-9