“…These studies demonstrated long-term and stable bioactive/efficacious effects on the nigrostriatal dopaminergic system. As such, this delivery system represents a novel version of previous encapsulated cell-based systems to deliver trophic factors to the brain and may be developed into a disease modifying and effective treatment for PD and other diseases ( Saito et al., 2017 , Tornøe et al., 2012 , Falcicchia et al., 2018 , Emerich et al., 2019 , Nanobashvili et al., 2019 , Orive et al., 2019 , Paolone et al., 2019 ).…”