How retinal pigment cells remove photoreceptor outer segment tips
Outer Segment tip ingestion by the RPE
This project looks at how the eye's retinal pigment cells take in bits of photoreceptor cells to help keep light-sensing cells healthy.
Quick facts
| Grant type | R01 grant |
|---|---|
| Study type | NIH-funded research |
| Funding institution | University of California Los Angeles NIH-funded |
| Lab location | 1 site (Los Angeles, United States) |
| Project ID | NIH-11252345 on NIH RePORTER |
What this research studies
Researchers will use high-speed live-cell and 3D imaging of primary retinal pigment epithelium (RPE) cells and animal models to watch how RPE cells form actin structures to grab and sever photoreceptor outer segment tips. They will combine cell-culture experiments and in vivo analyses to identify the molecular machinery that drives actin polymerization during tip ingestion. The team will also measure the daily timing of tip ingestion using methods that separate ingestion from later degradation steps. These experiments aim to determine whether RPE uses a trogocytosis-like mechanism to ingest tips and how that timing is regulated.
Who could benefit from this research
Good fit: People with photoreceptor-related retinal diseases such as retinitis pigmentosa or age-related macular degeneration are most relevant to this work.
Not a fit: Those with vision problems not caused by photoreceptor–RPE interactions, like glaucoma or refractive errors, are unlikely to see direct benefit.
Why it matters
Potential benefit: If confirmed, the findings could point to new targets or timing-based strategies to protect photoreceptors and slow some retinal degenerations.
How similar studies have performed: Prior work has shown RPE phagocytosis of photoreceptor material and actin involvement, but using fast 3D imaging to show trogocytosis and define precise daily timing is relatively new.
Where this research is happening
Los Angeles, United States
- University of California Los Angeles — Los Angeles, United States (Active)
Researchers
- Principal investigator: Williams, David S — University of California Los Angeles
- Study coordinator: Williams, David S
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 below.