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Enrichment of Glutathione Using Gamma-glutamylcysteine Supplementation in Parkinson's Disease Patients.

Brain Glutathione (GSH) Enrichment Through Gamma-glutamylcysteine (GGC) Supplementation in Early Parkinson's Disease Patients for Reduction of Extrapyramidal Motor Disturbances and Halting Cognition Decline: A Pilot Trial

Status
Recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07064005
Acronym
PDGSH
Enrollment
12
Registered
2025-07-14
Start date
2026-03-23
Completion date
2027-11-27
Last updated
2026-05-04

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Parkinsons Disease (PD)

Keywords

Blood, Brain, MR Spectroscopy, GGC, Glutathione, Parkinsons disease, Oxidative stress, Brain Iron

Brief summary

This study is designed l to evaluate the effects of GGC oral supplementation in early Parkinson's disease (PD) patients. The main objectives of the study are to evaluate: 1. To study the enrichment of master antioxidant, glutathione (GSH) levels in brain and blood of these PD patients compared to baseline due to GGC supplementation. 2. To study the changes in motor function, cognitive skills in PD patients due to GGC oral supplementation 3. To study impact of GGC on gut health on the PD patients.

Detailed description

This study will measure brain glutathione using non- invasive, state-of-the-art MEGA-PRESS pulse sequence in pre and post GGC supplementation after 12 months. The GSH level will also be measured in the blood in pre and post GGC supplementation. Brain and blood iron level will be measured in pre and post GGC supplementation. The neuropsychological examination and motor function will be performed in pre and post GGC supplementation. This study will provide the relation of brain GSH enrichment with motor performance. Our study will also provide any possible correlation with reduction of dysbiosis of the gut microbiome with GSH enrichment.

Interventions

400 mg (two times) per day

Sponsors

Pravat Mandal
Lead SponsorOTHER
Waste Connections Inc
CollaboratorUNKNOWN

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
PREVENTION
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
50 Years to 80 Years
Healthy volunteers
No

Inclusion criteria

* Confirmed Parkinson's Disease diagnosis. * Montreal Cognitive Assessment (MoCA) greater than or equal to 26. * Age (50 to 80 years of age). * Ability to read and write in English.

Exclusion criteria

* Presence of pacemakers, aneurysm clips, artificial heart valves, ear implants, metal fragments in the eyes, skin, or body. * Subjects with claustrophobia. * Patients with a clinical diagnosis of Parkinson's disease dementia or dementia with Lewy bodies. * Subjects with a history of cancer. * Subjects with active psychosis or delirium. * Subjects with chronic kidney (creatinine \> 1.5mg/dL) or liver disease (AST ≥ 1.5 ULN; ALT ≥ 1.5 ULN) within 30 days prior to enrolment. * Subjects on antioxidant therapy (ashwagandha, gingko biloba or N-acetylcysteine) or illicit drug abuse/dependence (cocaine, heroin, marijuana, or fentanyl). * Subjects with previous traumatic head injury.

Design outcomes

Primary

MeasureTime frameDescription
Changes in brain glutathione levels (mM) in people with Parkinson's Disease using Magnetic Resonance Spectroscopy compared to post-supplementation with GGC.12 monthsMEGA-PRESS is a non-invasive imaging technique, to detect various neurochemical (e.g., Glutathione) using 1H MR spectroscopy.
Changes in brain iron levels (ppb) in people with Parkinson's Disease using Magnetic Resonance Imaging between pre and post GGC supplementation.12 months
Changes in baseline blood iron levels(ng/μl) in people with Parkinson's Disease12 months
Changes in baseline blood glutathione levels (µmol/l) in people with Parkinson's Disease compared to post-supplementation with GGC12 months

Secondary

MeasureTime frameDescription
Monitor the change in the motor function using Movement Disorders Society-Unified Parkinson's Disease Rating Scale (MDS-UPDRS) pre and post GGC supplementation.12 monthsScoring Method: Each section of the UPDRS is scored on a scale from 0 to 4.The total UPDRS score is calculated by summing the scores from each section, ranging from 0 (no disability) to 176 (severe disability). Interpretation: Higher scores indicates greater severity of symptoms.
Cognitive functions modulation- pre and post GGC supplementation using Repeatable Battery for the Assessment of Neuropsychological Status (RBANS).12 monthsInterpretation: Higher scores indicate greater cognitive function.
Changes from baseline in the psychological distress using Brief Symptom Inventory (BSI-18) (self-report) in people with Parkinson's Disease.12 monthsScoring Method: Each item is scored on a 0-4 scale, with the total score indicating the severity of distress. Interpretation: Higher total scores indicate greater severity of psychological distress.
Changes from baseline in the cognitive functions like memory, attention and decision-making using PROMIS Cognitive Function - Abilities-Short Form 8a (self-report) in people with Parkinson's Disease.12 monthsScoring Method: Raw Score: 8-40 Interpretation: Lower scores on this measure indicate greater subjective cognitive difficulty.
Changes from baseline cognitive functions like attention, processing speed, and mental flexibility using Trail Making Test (TMT) A&B in people with Parkinson's Disease.12 monthsScoring Method: The average scores are as follows: • Trail A - 29 seconds • Trail B - 75 seconds Interpretation: Higher scores indicate greater impairment

Countries

United States

Contacts

CONTACTPravat K MANDAL, PHD
mandalpk@pitt.edu4126999561
CONTACTNazia Pillar, M.S
naa430@pitt.edu878-670-3123
PRINCIPAL_INVESTIGATORPravat K Mandal, PHD

University of Pittsburgh

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 5, 2026