Macrophage signals driving scar that blocks bone healing under strain
Official title: Unraveling Macrophage Dysfunction in Fibrotic Healing Under Mechanical Strain
Funded at State University of New York at Buffalo · NIH-11450176 · Data updated 2026-11-12
Aims to understand how immune cells contribute to scar formation after a bone fracture and whether blocking a key signal can restore bone healing under mechanical instability.
Quick facts
| Grant type | R01 grant |
|---|---|
| Study type | NIH-funded research |
| Funding institution | State University of New York at Buffalo NIH-funded |
| Lab location | 1 site (Amherst, United States) |
| Project start | August 18, 2026 |
| Project end | July 31, 2031 |
| Funding year | 2026 |
| Award (this year) | $576,328 |
| NIH project number | 1R01AR086269-01A1 |
| Project ID | NIH-11450176 on NIH RePORTER |
Who could benefit from this research
✓Could help
Ideal candidates are individuals with long-bone fractures at risk for impaired healing or nonunion, though this grant is preclinical and uses animal models to inform future human studies.
✕Less likely to help
Patients with fractures that heal normally may not benefit directly from this basic science work.
What this research studies
This project studies why bone fractures sometimes heal with excessive scar tissue when there is movement at the fracture site. It focuses on macrophages, a type of immune cell, and a molecule they release that activates a healing pathway leading to fibrosis and blocked bone formation. Using mouse models that mimic unstable fractures, the researchers will measure how strain affects macrophage behavior and fibrosis, and test whether inhibiting this signaling can improve bone regeneration. If successful, the work could point to new strategies to prevent nonunion and reduce pain and disability for patients with badly healing fractures.
Why it matters
Potential benefit: If the approach works, patients with difficult-to-heal fractures could experience faster, more reliable bone regeneration and less chronic pain.
How similar studies have gone: Previous research in other tissues shows macrophages influence fibrosis; this study tests a targeted mechanism in bone under mechanical strain, which is relatively novel.
Where this research is happening
-
State University of New York at Buffalo
Amherst, United States Active
Researchers
- Principal investigator: Tiruvannamalai Annamalai, Ramkumar — State University of New York at Buffalo
- Study coordinator: Tiruvannamalai Annamalai, Ramkumar
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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.