1189-MAPK and WNT Dynamics in Intestinal Cancer

Paper Talk · Jun 26, 2026 · 22m

This research article from Nature Genetics explores how the interplay between MAPK and WNT signaling pathways drives colorectal cancer development. While KRAS mutations (MAPK pathway) are typically insufficient to start intestinal tumors, the study demonstrates they induce a plastic, regenerative cell state that suppresses traditional Lgr5+ stem cells. Researchers found that tumor initiation specifically requires WNT pathway activation to establish a stem-like state, whereas MAPK hyperactivation powers subsequent tumor growth. By analyzing mouse models and single-cell data, the authors show…