Deciphering the Function of Canonical Wnt Signals in Development and Disease: Conditional Loss- and Gain-of-Function Mutations of β-Catenin in Mice

The study reviewed the role of canonical Wnt signaling, particularly through β-catenin, in development and disease using conditional loss- and gain-of-function mutations in mice. These mutations allowed researchers to bypass early embryonic lethality and redundancy issues, revealing that Wnt signaling is crucial for progenitor cell expansion, lineage decisions, and the maintenance of stem cells. The findings also linked Wnt signaling to cancer stem cells, providing new models for studying human diseases associated with its deregulation.