Parkinson's Disease: A Complex Interplay of Mitochondrial DNA Alterations and Oxidative Stress Bioconjugates of curcumin display improved protection against glutathione depletion mediated oxidative stress in a dopaminergic neuronal cell line: Implications for Parkinson's disease ScienceDirect Dr. Joseph C. Maroon is a neurosurgeon and a professor at the University of Pittsburgh Medical Center. His research on Alzheimers and Parkinsons disease focuses on the role of oxidative stress and Central nervous system uptake of intranasal glutathione in Parkinson's disease npj Parkinson's Disease Targeting the Cysteine Redox Proteome in Parkinson's Disease: The Role of Glutathione Precursors and Beyond Randomized, double'blind, pilot evaluation of intravenous glutathione in Parkinson's disease