A nano-micro alternating multilayer scaffold loading with rBMSCs and BMP-2 for bone tissue engineering.
Shan Ding1, Long Li2, Xian Liu3
1Key Laboratory of Advanced Technologies of Material, Minister of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, PR China; School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, PR China.
Colloids and Surfaces. B, Biointerfaces
|June 30, 2015
Summary
This study introduces a novel multilayer scaffold for bone tissue engineering, combining nanofibers and microbeads loaded with stem cells and growth factors. The scaffold effectively promotes bone formation both in vitro and in vivo.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Bone tissue engineering aims to repair or regenerate bone defects.
- Current scaffolds often lack the complex hierarchical structure found in native bone.
- Developing advanced scaffolds that mimic native bone architecture is crucial for effective bone regeneration.
Purpose of the Study:
- To develop a nano-micro alternating multilayer scaffold for bone tissue engineering.
- To incorporate rat bone marrow mesenchymal stem cells (rBMSCs) and bone morphogenetic protein-2 (BMP-2) into the scaffold.
- To evaluate the osteogenic potential and ectopic bone formation capabilities of the developed scaffold.
Main Methods:
- Fabrication of a nano-micro alternating multilayer scaffold using electrospinning and microfluidic techniques.
- Simultaneous loading of rBMSCs and BMP-2 into monodispersed calcium alginate microbeads.
- In vitro evaluation of osteogenic differentiation using alkaline phosphatase (ALP) activity and Alizarin Red S staining.
- In vivo assessment of ectopic bone formation through histological and immunohistochemical analyses.
Main Results:
- The developed scaffold successfully integrated electrospun nanofibers with microbeads containing rBMSCs and BMP-2.
- In vitro studies showed significant osteogenic differentiation of rBMSCs within the scaffold.
- In vivo assessments confirmed the scaffold's capability for ectopic bone formation.
Conclusions:
- The nano-micro alternating multilayer scaffold is a promising platform for bone tissue engineering.
- Simultaneous delivery of cells and growth factors within the scaffold enhances osteogenesis.
- The scaffold's ability to induce ectopic bone formation suggests broad applicability in regenerative medicine.
