Immune cells in the eardrum: where they come from and how they help it develop and heal
The origins and roles of macrophages in postnatal tympanic membrane development, homeostasis, and repair
This project looks at how immune cells called macrophages help the eardrum form, stay healthy, and repair after injury to guide better ways to treat eardrum holes and related hearing problems.
Quick facts
| Grant type | R01 grant |
|---|---|
| Study type | NIH-funded research |
| Funding institution | Oregon Health & Science University NIH-funded |
| Lab location | 1 site (Portland, United States) |
| Project ID | NIH-11266209 on NIH RePORTER |
What this research studies
From a patient perspective, the team will track macrophages in the eardrum as it matures after birth and after it is injured, using laboratory imaging, gene expression (RNA sequencing), and animal models to follow cells, blood vessels, and nerves. They compare newborn and adult eardrums to see how resident macrophages change over time and how blood vessel and nerve development relate to those changes. After creating controlled perforations, they watch how monocyte-derived macrophages arrive at the wound, how new blood vessels form, and how nerve fibers are involved in healing. The researchers aim to connect these basic findings to possible ways to boost repair and reduce infections after eardrum injury.
Who could benefit from this research
Good fit: Adults with eardrum perforations, recurrent tympanic membrane problems, or conductive hearing issues could be candidates for related future trials or sample-donation efforts.
Not a fit: People with inner-ear sensorineural hearing loss or conditions unrelated to the eardrum are unlikely to benefit directly from this project.
Why it matters
Potential benefit: If successful, this work could point to new treatments that speed eardrum healing, lower infection risk, and help prevent hearing loss from perforations.
How similar studies have performed: Macrophages are known to help repair other tissues, but applying these ideas specifically to the eardrum is largely new and has not yet been tested in clinical trials.
Where this research is happening
Portland, United States
- Oregon Health & Science University — Portland, United States (Active)
Researchers
- Principal investigator: Shi, Xiaorui — Oregon Health & Science University
- Study coordinator: Shi, Xiaorui
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.