Exploring how gut bacteria affect cognitive issues in Parkinson's disease

Microbiome Composition and Function Contributes to Cognitive Impairment and Neuroinflammation in Parkinson's Disease

Observational California State University, San Bernardino · NCT05419453

This study looks at how the bacteria in the gut might affect thinking problems in people with Parkinson's disease to find new ways to help them.

Quick facts

Study typeObservational
Enrollment100 (estimated)
Ages55 Years to 85 Years
SexAll
SponsorCalifornia State University, San Bernardino Academic / other
Locations1 site (San Bernardino, California)
Trial IDNCT05419453 on ClinicalTrials.gov

What this trial studies

This observational study investigates the relationship between gut microbiome composition and cognitive impairment in individuals with Parkinson's disease. It aims to identify alternative mechanisms contributing to cognitive decline, beyond the traditional understanding of dopaminergic disruptions. By examining the gut-bacterial composition, the study seeks to uncover potential prognostic indicators and novel treatment targets for cognitive impairment in Parkinson's disease. Participants will be evaluated based on their microbiome profiles and cognitive function.

Who should consider this trial

Good fit: Ideal candidates for this study are individuals diagnosed with Parkinson's disease.

Not a fit: Patients with a history of significant neurological events or gastrointestinal diseases may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to improved understanding and treatment options for cognitive impairment in Parkinson's disease.

How similar studies have performed: While the relationship between gut microbiome and neurological conditions is being explored, this specific approach is relatively novel and has not been extensively tested.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Parkinson's Disease

Exclusion Criteria:

* Use of antibiotics or immunosuppressant medications within the last 3 months, history of psychiatric hospitalizations, stroke, epilepsy, head injury resulting in a loss of consciousness for more than 30 minutes, Alzheimer's disease or other significant brain injury or neurologic event, history of inflammatory gastrointestinal diseases such as Crohn's, Celiac's disease or irritable bowel syndrome

Where this trial is running

San Bernardino, California

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Parkinson DiseaseCognition
Last reviewed 2026-06-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.