Scientists in Sweden are developing new ways to grow brain cells in the laboratory that could one day be used to treat patients with Parkinson’s disease, an international conference of biologists organised by the European Science Foundation (ESF) was told last week. Professor Ernest Arenas of the Karolinska Institute in Stockholm presented his research to the EuroSTELLS “Stem Cell Niches” conference in Barcelona on January 11. Stem cell therapy hold the promise of treating disease by growing new tissues and organs from stem cells – ‘blank’ cells that have the potential to develop into fully mature or ‘differentiated’ cells. The EuroSTELLS is an ESF EURCORES programme, managed by the European Medical Research Councils (EMRC), that aims to develop a stem cell ‘toolbox’ by generating fundamental knowledge on stem cell biology.