Restoring the brain's cleanup cells to help in Lewy body disease
Official title: Repopulation of the Microglia/Macrophage Niche in Experimental Lewy Body Disease
Funded at Duquesne University · NIH-11194408 · Data updated 2026-11-12
This project looks at whether removing and then regrowing the brain's immune cells can help clear harmful protein clumps that damage people with Lewy body disease.
Quick facts
| Grant type | R21 grant |
|---|---|
| Study type | NIH-funded research |
| Funding institution | Duquesne University NIH-funded |
| Lab location | 1 site (Pittsburgh, United States) |
| Project start | September 17, 2024 |
| Project end | August 31, 2026 |
| Funding year | 2025 |
| Award (this year) | $188,252 |
| NIH project number | 5R21NS141002-02 |
| Project ID | NIH-11194408 on NIH RePORTER |
Who could benefit from this research
✓Could help
People diagnosed with Lewy body dementia or Parkinson-related Lewy body disease, especially in earlier stages with smell loss or mood/cognitive changes, would be the likely candidates for future clinical testing of this approach.
✕Less likely to help
Patients without Lewy body pathology or those with very advanced disease stages are less likely to benefit from this microglia-targeting approach.
What this research studies
Researchers use a mouse model that copies early Lewy body changes by introducing α-synuclein clumps into smell-related brain areas, producing problems with smell, mood, and memory. They temporarily remove microglia/macrophages with an oral drug and then allow the brain to repopulate those cells to see if fresh cells better clear toxic protein aggregates. The team measures changes in brain pathology and behavior to link microglial repopulation with improvements in disease signs. Findings are intended to guide whether targeting microglia could become a strategy for treating Lewy body disorders.
Why it matters
Potential benefit: If successful, this work could point to new treatments that restore microglial function to help remove α-synuclein clumps and slow or improve symptoms in Lewy body disorders.
How similar studies have gone: Prior animal studies have shown that clearing and repopulating microglia can change disease markers, but this strategy is still novel and has not been proven in people.
Where this research is happening
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Duquesne University
Pittsburgh, United States Active
Researchers
- Principal investigator: Leak, Rehana K — Duquesne University
- Study coordinator: Leak, Rehana K
Related research
Other NIH-funded projects on the same topics.
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Gut-immune changes in Lewy Body Diseases and early signs
A study at Stanford will explore how the gut and its immune system may be linked to Lewy Body diseases like Parkinson’s and related conditions, with findings that could point to new ways to understand and someday treat these illnesses.
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Gut-immune system links in Lewy Body Disease
Researchers are studying how the gut and immune system may influence Lewy body diseases like Parkinson’s and dementia with Lewy bodies, aiming to uncover new clues that could lead to better diagnosis and treatment in the future.
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Amygdala’s role in Lewy body disease and Alzheimer’s disease
A clinician-science training grant to help Dr. D. Luke Fischer study how the amygdala may drive the spread of disease in people with Lewy body disease and Alzheimer’s disease.
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Gut immune changes in Lewy body disorders
This project looks at whether changes in gut immune signals and gut bacteria are linked to Parkinson's disease, dementia with Lewy bodies, and people with early signs like REM sleep behavior disorder.
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Automated Neurodegeneration Index for Lewy Body Disease in At-Risk Groups
A new machine‑learning tool analyzes routine brain scans to identify early neurodegeneration in people at risk for Parkinson’s disease or dementia with Lewy bodies.
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Identifying molecules that interact with alpha-synuclein in Alzheimer's disease–related dementias
A study at Mayo Clinic Jacksonville will map which proteins interact with alpha-synuclein in brain tissue and human-derived cells to understand its role in dementia like Lewy body disease and Alzheimer’s-related dementias.
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.