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Updated: May 31, 2026

Direct Mouse Trauma/Burn Model of Heterotopic Ossification
Published on: August 6, 2015
Sensory nerve induced inflammation contributes to heterotopic ossification
Elizabeth Salisbury1, Eric Rodenberg, Corinne Sonnet
1Center for Cell and Gene Therapy, Baylor College of Medicine, Houston, Texas 77030, USA.
Bone morphogenetic proteins (BMPs) trigger neuroinflammation and heterotopic ossification (HO) following injury. Blocking neuroinflammation significantly reduces HO, indicating a role for nerves and stem cells in bone formation.
Area of Science:
- Regenerative Medicine
- Neuroscience
- Orthopedics
Background:
- Heterotopic ossification (HO), or soft tissue bone formation, is a common complication of traumatic injury.
- Bone morphogenetic proteins (BMPs) released upon injury are implicated in HO development.
- Recent military data indicate HO affects up to 60% of blast-related traumatic injuries.
Purpose of the Study:
- To investigate the role of peripheral nerves in BMP-induced heterotopic ossification.
- To explore the link between neuroinflammation and HO.
- To identify potential therapeutic targets for reducing HO.
Main Methods:
- In vivo studies using wild-type and TRPV1(-/-) mice.
- BMP2 administration to induce HO.
- Measurement of neuroinflammatory molecules substance P (SP) and calcitonin gene related peptide (CGRP).
- Analysis of mast cell degranulation and stem cell marker expression.
Main Results:
- BMP2 induced rapid and sustained expression of SP and CGRP.
- TRPV1(-/-) mice showed suppressed SP/CGRP levels and significantly reduced HO.
- Mast cell degranulation was observed and inhibition reduced HO.
- Nerves expressed stem cell and osteoblast markers after BMP2 induction.
Conclusions:
- BMP2 directly activates sensory neurons, inducing neurogenic inflammation that drives HO.
- Neuroinflammation leads to nerve remodeling and release of stem cells contributing to bone formation.
- Inhibiting neuroinflammation presents a promising therapeutic strategy for reducing HO.
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