by IOS Press Immunohistochemistry for alpha-synuclein showing positive staining (brown) of an intraneural Lewy-body in the Substantia nigra in Parkinson’s disease. Credit: Wikipedia After several decades of pre-clinical development, cell- and gene-based therapies for Parkinson’s disease (PD) are now actively being explored. In this special supplement to the Journal of Parkinson’s Disease, “Repairing the Parkinsonian Brain,” experts...