A Phase 1-2 Study of Petosemtamab Alone or With Standard Chemotherapy in People With Advanced Colorectal Cancer

In the U.S.

Full Title

Phase 1/2 dose escalation and cohort expansion study evaluating MCLA-158 (petosemtamab) as single agent or in combination in advanced solid tumors

Purpose

Researchers are assessing petosemtamab given alone or with standard chemotherapy in people with advanced colorectal cancer. The people in this study have colorectal cancer that is inoperable (cannot be removed with surgery) or has metastasized (spread).

Petosemtamab is a bispecific antibody. It works against cancer by binding to two proteins. One protein is on cancer cells. The other protein is on intestinal stem cells, which help renew the lining of the intestines. Intestinal cancer stem cells may help cancer cells survive therapy. Petosemtamab is also designed to help your immune system kill cancer cells.

If you join this study, you will get petosemtamab alone or with standard chemotherapy. The standard chemotherapy will be either FOLFOX (5-fluorouracil [5-FU], leucovorin, and oxaliplatin) or FOLFIRI (5-FU, leucovorin, and irinotecan). All of the medications in this study are given intravenously (by vein).