Improving L-dopa treatment for Parkinson's disease by altering gut bacteria
Official title: Modifying the microbiome to enhance L-dopa therapy in Parkinson’s disease
Funded at Medical College of Wisconsin · NIH-11074696 · Data updated 2026-11-12
This study is looking at how changing the bacteria in your gut might help make L-dopa work better for people with Parkinson's disease, so you can manage your symptoms more effectively and possibly experience fewer side effects.
Quick facts
| Grant type | R21 grant |
|---|---|
| Study type | NIH-funded research |
| Funding institution | Medical College of Wisconsin NIH-funded |
| Lab location | 1 site (Milwaukee, United States) |
| Project start | April 15, 2024 |
| Project end | March 31, 2026 |
| Funding year | 2025 |
| Award (this year) | $234,000 |
| NIH project number | 5R21NS137244-02 |
| Project ID | NIH-11074696 on NIH RePORTER |
Who could benefit from this research
✓Could help
Ideal candidates for this research are individuals diagnosed with Parkinson's disease who are currently receiving or are eligible for L-dopa therapy.
✕Less likely to help
Patients with Parkinson's disease who are not on L-dopa therapy or those with contraindications to L-dopa may not benefit from this research.
What this research studies
This research investigates how modifying the gut microbiome can enhance the effectiveness of L-dopa therapy in patients with Parkinson's disease. The approach focuses on understanding the role of specific gut bacteria that metabolize L-dopa, potentially leading to better management of motor symptoms. By targeting the bacteria responsible for converting L-dopa into dopamine, which cannot cross the blood-brain barrier, the study aims to improve treatment outcomes and reduce side effects. Patients may be involved in trials that explore dietary or probiotic interventions to optimize their L-dopa therapy.
Why it matters
Potential benefit: If successful, this research could lead to more effective L-dopa treatment, improving motor function and quality of life for Parkinson's disease patients.
How similar studies have gone: Previous research has shown promising results in modifying the gut microbiome to enhance drug efficacy, suggesting potential success for this novel approach.
Where this research is happening
-
Medical College of Wisconsin
Milwaukee, United States Active
Researchers
- Principal investigator: Feix, Jimmy — Medical College of Wisconsin
- Study coordinator: Feix, Jimmy
Related research
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This project enrolls people with Parkinson’s disease and healthy controls to build a big registry and study how gut function, brain signals, sleep, and circadian rhythms relate to PD symptoms.
-
Gut microbiome and Parkinson's disease: how gut bugs relate to symptoms and progression
A multi-year study will look at gut bacteria and related markers in people with Parkinson’s disease to understand how the gut-brain connection may influence symptoms and progression.
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Gut-Brain Axis in Parkinson’s Disease: biomarkers and procedures to track progression
A patient-focused program to study how gut health and the brain interact in Parkinson’s disease using biomarkers and clinical procedures.
-
Understanding posture and movement in Parkinson’s patients to reduce falls
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About this research
- This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
- Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
- For full project details, budget, and progress reports, visit the official NIH RePORTER page.