Stem cell capsules restore motor function in Parkinson’s rats

A study by TreeFrog Therapeutics demonstrated that neural microtissues derived from induced pluripotent stem cells (iPSCs) can replace lost dopaminergic neurons in Parkinson's disease and restore motor function in rats. Using their C-Stem platform, the team developed 3D cell capsules that promote cell survival after transplantation. These alginate-based capsules mimic the natural environment of the body, allowing iPSCs to grow into dopaminergic neurons. When transplanted into Parkinson's rat models, the neurons survived, integrated into the brain, and restored motor function within 16 weeks, even when using cryopreserved cells. This scalable bioproduction method could lead to more effective cell therapies for Parkinson's.