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[Osteogenic effect of collagen/bioglass composites carrying noggin siRNA]
Yanling Chen1, Liangjiao Chen2, Zhengmao Li2
1Department of Orthodontics, Stomatological Hospital Affiliated to Fujian Medical University, Fuzhou 350004, China.
Objective:
To investigate osteogenic effect of collagen/bioglass composites loaded with a small interfering RNA (siRNA) targeting noggin.
Methods:
The collagen/bioglass composites loaded with the negative control siRNA or noggin siRNA were prepared by freeze-drying method. CCK8 test was used to evaluate the proliferation of MC3T3 cells exposed to the aqueous extracts of collagen/bioglass composites and the siRNA-loaded collagen/bioglass composites. ALP activity assay, quantitative real-time PCR and Alizarin Red staining were used to assess the effect of the 3 composites on mineralization in MC3T3 cells.
Results:
MC3T3 cells cultured for 3 and 5 days in the presence of the extracts of the 3 composites all showed significantly more active proliferation than the blank control cells (P < 0.05). Compared with the cells seeded on the scaffold without siRNA, MC3T3 cells seeded on collagen/bioglass scaffold loaded with noggin siRNA showed a significantly higher ALP activity at 14 days after seeding (P < 0.05) with significantly increased expression of ALP, Runx2 and BSP mRNAs (P < 0.05). Alizarin Red staining showed that the cells seeded on the noggin siRNA-loading collagen/bioglass scaffold contained significantly more mineralized nodules than the other cells (P < 0.05).
Conclusions:
The collagen/bioglass composites loaded with noggin siRNA have a good biocompatibility, and the collagen/bioglass composites and noggin siRNA show a synergistic effect in promoting osteogenesis.
Insights
Collagen/bioglass composites loaded with noggin siRNA promote bone formation. This combination demonstrates good biocompatibility and a synergistic effect in enhancing osteogenesis.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Molecular Biology
Context:
- Bone regeneration remains a significant clinical challenge.
- Developing effective strategies for bone defect repair is crucial.
- Collagen/bioglass composites offer promising scaffolds for bone tissue engineering.
Purpose:
- To investigate the osteogenic potential of collagen/bioglass composites.
- To evaluate the effect of incorporating noggin siRNA on osteogenesis.
- To assess the biocompatibility and synergistic effects of the composite material.
Summary:
- Collagen/bioglass composites were fabricated with negative control siRNA or noggin siRNA using freeze-drying.
- Cell proliferation, alkaline phosphatase (ALP) activity, gene expression (ALP, Runx2, BSP), and mineralization were assessed in MC3T3 cells.
- Noggin siRNA-loaded composites significantly enhanced MC3T3 cell proliferation, ALP activity, osteogenic gene expression, and mineralization compared to controls.
Impact:
- Collagen/bioglass composites loaded with noggin siRNA exhibit excellent biocompatibility.
- This combination demonstrates a synergistic effect, significantly promoting osteogenesis.
- The findings suggest potential applications in bone tissue engineering and regenerative medicine.
