Freddy Radtke

Freddy Radtke is a Full Professor at the School of Life Sciences at École polytechnique fédérale de Lausanne (EPFL), where he leads the Radtke Lab (UPRAD) within the Swiss Institute for Experimental Cancer Research (ISREC). He holds multiple affiliations across EPFL, including in the SSV-ENS and EDMS-ENS programs, reflecting his broad engagement in teaching and doctoral education in life sciences.

His research is centered on the molecular mechanisms of stem cell maintenance and differentiation, particularly through the Notch signaling pathway. His work spans several self-renewing systems: the hematopoietic system, skin, and gut. Key findings include the identification of Delta-like 4 as the essential Notch1 ligand for T cell commitment, the tumor suppressor role of Notch1 in skin, and its critical function as a gatekeeper of intestinal progenitor cells by repressing CDK inhibitors. These discoveries have significant implications for understanding cancer development and regenerative processes.

The recent publications highlight a consistent focus on Notch signaling across diverse biological contexts—hematopoiesis, skin development, intestinal regeneration, and stem cell systems biology. The keywords and subfields reflect deep mechanistic investigations into cell fate decisions, signal transduction, and tissue homeostasis, with strong translational relevance to cancer and inflammatory diseases.

Freddy Radtke has mentored numerous Ph.D. students and is actively involved in teaching courses such as Stem Cells and Organoids and Scientific Project Design in Translational Oncology. His lab conducts research supported by external funding, and he collaborates across disciplines to integrate systems biology with stem cell research. The lab includes scientists, doctoral assistants, technicians, and administrative staff, indicating a vibrant and multidisciplinary research team.