Mehdi Maanaoui is a nephrologist at the University of Lille, specialising in kidney transplantation. His passion for cell transplantation led him first to the Netherlands in the laboratory of Prof Ton Rabelink (Leiden University Medical Center) and then to the islet laboratory of Prof François Pattou (Inserm U1190 – EGID), Lille, France. He is currently undertaking a PhD programme exploring methods to improve clinical islet transplantation, especially for people with type 1 diabetes undergoing kidney transplantation. He has authored more than 20 publications, mainly in transplantation and teaches nephrology and transplantation in the University of Lille.