Recurrent COPA Gene Mutations Identified as Unexpected Driver of Intestinal Tumors

A research team led by Keio University School of Medicine has identified recurrent mutations in the COPA gene as an alternative driver of small intestine tumorigenesis, a gene previously not linked to cancer. Published in *Nature Genetics*, this study addresses a long-standing question regarding tumor formation and progression in small intestinal cancers, where common APC gene mutations are less prevalent in malignant forms. The findings suggest a previously unrecognized mechanism by which these mutations in a cellular cargo transport gene may contribute to tumor growth.