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Directing Neutrophil Fate via Sensory-Immune Interactions Accelerates Diabetic Bone Healing
Xuanyu Qi1,2,3, Yijia Huang2,3, Yuran Li2,3
1Shanghai Stomatological Hospital, Fudan University, Shanghai 201102, China.
Research (Washington, D.C.)
|June 26, 2026
Summary
Diabetic bone defects involve inflammation and sensory nerve loss. A novel scaffold restores nerve growth and controls inflammation, enhancing bone healing by improving immune cell function and macrophage efferocytosis.
Area of Science:
- Biomedical Engineering
- Immunology
- Regenerative Medicine
Background:
- Diabetic bone defects are challenging to treat due to dysregulated inflammation.
- The role of sensory dysfunction in diabetes-related inflammation and bone healing is not well understood.
Purpose of the Study:
- To investigate the link between sensory innervation and immune cell dynamics in diabetic bone defects.
- To develop a biomaterial scaffold that modulates neuro-immune interactions for enhanced bone regeneration.
Main Methods:
- Characterization of immune cell function and innervation in diabetic bone defects.
- Fabrication of a dual-release scaffold releasing interleukin-8 (IL-8) and nerve growth factor (NGF).
- Evaluation of the scaffold's efficacy in promoting mandibular bone regeneration in diabetic rats.
Main Results:
- Diminished sensory innervation correlates with impaired neutrophil chemotaxis and macrophage efferocytosis in diabetic bone defects.
- The novel scaffold successfully delivered IL-8 and NGF, promoting timely neutrophil recruitment and stem cell homing.
- Sensory innervation enhanced neutrophil N2 polarization, and macrophages formed synapse-like structures with neurites, restoring efferocytosis via Galectin-3.
- Spatiotemporal regulation of the neuro-immune circuit significantly improved mandibular bone regeneration in diabetic rats.
Conclusions:
- Sensory dysfunction exacerbates inflammation and impairs bone healing in diabetes.
- A targeted neuro-immune therapeutic strategy using a biomaterial scaffold can effectively promote bone regeneration in diabetic conditions.
- Modulating the neuro-immune axis offers a promising therapeutic avenue for managing diabetic bone defects.
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