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Pierre Nassoy is the laureate of the CNRS 2022 Innovation Medal. CNRS research professor, he applies the physical chemistry approaches to living things. At the Photonics, Numerical, and Nanosciences Laboratory (LP2N)1 in Talence (southwestern France), he focuses on future therapies based on stem cells – to treat tumours and Parkinson’s disease in particular – and files an increasing number of patents. Thanks to a CNRS pre-maturation programme, the company TreeFrog Therapeutics is one of the most noted and prize-winning French start-ups of recent times, both nationally and internationally. The company uses its disruptive technology to reliably produce a large quantity of very high-quality stem cells, and just opened a first subsidiary in the United States.