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Sinusoidal alternating electromagnetic field accelerates fracture healing in rats
Yuhai Gao1,2, Xuefeng Hou3, Zhenlong Wei3,4
1Laboratory of Basic Medical Science Research, the 940th Hospital of Joint Logistics Support Force of PLA, Lanzhou 730050, China. gyh1389@126.com.
Summary
Sinusoidal alternating electromagnetic field (SEMF) significantly enhances fracture healing in rats by promoting bone formation and vascularization. This study found SEMF treatment accelerated bone scab formation and improved overall fracture repair without adverse effects.
Area of Science:
- Biomedical Engineering
- Orthopedics
- Regenerative Medicine
Background:
- Fracture healing is a complex biological process crucial for restoring bone integrity.
- Non-invasive therapeutic modalities are continuously explored to enhance fracture repair.
- Electromagnetic fields have shown potential in modulating cellular activities involved in healing.
Purpose of the Study:
- To investigate the efficacy of sinusoidal alternating electromagnetic field (SEMF) in accelerating fracture healing.
- To elucidate the underlying mechanisms of SEMF on osteogenesis and angiogenesis.
- To evaluate the safety profile of SEMF treatment in a preclinical model.
Main Methods:
- A femoral fracture model was established in Wistar rats.
- Rats were treated with SEMF (50 Hz, 1.8 mT, 90 min/day) or served as controls.
- Fracture healing was assessed via X-ray, micro-CT, and angiography; molecular markers (COL-1, OSX, RUNX2, VEGF) were analyzed by Western blotting; organ safety was evaluated using HE staining.
Main Results:
- SEMF treatment significantly increased bone scab scores and bone volume compared to controls (P<0.01).
- Enhanced expression of osteogenic markers (COL-1, OSX, RUNX2) and vascular endothelial growth factor (VEGF) was observed in the SEMF group (P<0.05).
- SEMF promoted angiogenesis and showed no adverse histopathological changes in major organs.
Conclusions:
- SEMF effectively accelerates fracture healing in a rat model.
- The mechanism involves promoting osteogenic factor expression and vascular proliferation.
- SEMF demonstrates a favorable safety profile for fracture treatment.
