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Combining electrical stimulation and tissue engineering to treat large bone defects in a rat model
Liudmila Leppik1, Han Zhihua1, Sahba Mobini1,2
1Frankfurt Initiative for Regenerative Medicine, Experimental Orthopedics and Trauma Surgery, J.W. Goethe University, Frankfurt am Main, Germany.
Scientific Reports
|April 22, 2018
Summary
Electrical stimulation (ES) enhances bone tissue engineering (BTE) by boosting osteogenic differentiation in Mesenchymal Stem Cells (MSCs) in vitro. This translates to improved bone healing, increased strength, and better vascularization in vivo for BTE treatments.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Orthopedic Surgery
Background:
- Bone tissue engineering (BTE) offers an alternative for large bone defects.
- BTE combines cells, scaffolds, and growth factors to mimic autografts.
- Electrical stimulation (ES) is a known therapeutic for fractures and influences bone cell behavior.
Purpose of the Study:
- To investigate the efficacy of electrical stimulation (ES) in enhancing bone tissue engineering (BTE).
- To evaluate the impact of ES on Mesenchymal Stem Cell (MSC) osteogenic differentiation in vitro.
- To assess the in vivo effects of ES on the healing of large bone defects treated with BTE.
Main Methods:
- In vitro experiments exposing MSCs + scaffold to ES for 3 weeks.
- In vivo experiments applying ES to BTE-treated rat femur defects for 8 weeks.
- Assessment of osteogenic differentiation, bone formation, strength, vessel density, and gene expression.
Main Results:
- ES significantly increased osteogenic differentiation of MSCs in vitro.
- In vivo, ES improved bone healing, bone formation, and mechanical strength.
- ES also enhanced vessel density and osteogenic gene expression in vivo.
Conclusions:
- Electrical stimulation significantly promotes osteogenic differentiation in vitro.
- The observed in vitro effects of ES translate to enhanced bone healing in vivo.
- ES shows potential to optimize BTE treatments for improved therapeutic outcomes.
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