Frontiers Cerebrospinal fluid biochemical studies in patients with Parkinson's disease: toward a potential search for biomarkers for this disease Glutamate cysteine ligase as a diagnostic biomarker and therapeutic target in Parkinson's disease: a multi omics and experimental study European Journal of Medical Research Springer Nature Link Glutathione S transferase: A keystone in Parkinson's disease pathogenesis and therapy ScienceDirect Frontiers Glutathione: Pharmacological aspects and implications for clinical use in non alcoholic fatty liver disease