In this stimulating episode, we welcome Dr. Klein, an esteemed cellular biologist, who delves into the intriguing world of mammalian intestinal stem cells (ISCs). The maintenance of tissue integrity largely depends on how stem cells react to changes in niche signals, and ISCs are no exception as they rely on Wnt ligands for self-renewal and proliferation. This delicate balancing act plays a crucial role in tissue regeneration after injury and in inflammatory bowel diseases, but if left unchecked, it could lead to colorectal cancer.

Dr. Klein discusses his intriguing findings about Discs large 1 (Dlg1), a protein previously thought to be integral to cell polarity but now found to be dispensable for that function and cellular turnover during intestinal homeostasis. However, Dlg1's role becomes critical when Wnt signaling intensifies. Employi ...