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Evaluation of Polymeric Gene Delivery Nanoparticles by Nanoparticle Tracking Analysis and High-throughput Flow Cytometry
Published on: March 1, 2013
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CAG peptide functionalized graphene quantum dots-cationic polymer composite gene carriers.
Xinghong Duo1,2, Qirong Xu1,2, Chen Li1,2
1School of Chemistry and Chemical Engineering, Qinghai University for Nationalities, Xining, Qinghai, 810007, P. R. China. wlkdxh@tju.edu.cn.
Journal of Materials Chemistry. B
|July 11, 2024
Summary
This study developed a novel gene vector using graphene quantum dots and cationic polymers, which efficiently delivers therapeutic genes to endothelial cells. The new vector demonstrates low toxicity and significantly enhances cell proliferation, migration, and angiogenesis for regenerative medicine.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Gene Therapy
Background:
- Endothelial cells play a crucial role in vascular health and regeneration.
- Developing efficient and low-toxicity gene delivery systems is essential for regenerative medicine.
- Targeted delivery of therapeutic genes can enhance endothelial cell function.
Purpose of the Study:
- To design and prepare a targeted graphene quantum dot-cationic polymer composite gene vector.
- To evaluate the efficiency and safety of the gene vector for delivering pZNF580 to human umbilical vein endothelial cells (HUVECs).
- To investigate the vector's potential in promoting endothelial cell proliferation, migration, and angiogenesis.
Main Methods:
- Preparation of a graphene quantum dot-cationic polymer composite gene vector functionalized with CAG peptide.
- Cell viability assays (CCK-8) to assess cytotoxicity.
- Flow cytometry and Western blot to confirm gene transfection efficiency and protein expression.
- In vitro assays including EdU, wound healing, Transwell, and angiogenesis assays to evaluate cell proliferation, migration, and tube formation.
Main Results:
- The composite gene vector showed high cell viability (>80%) at tested concentrations, indicating low toxicity compared to the control (Lip2000).
- Efficient delivery of pZNF580 gene and high ZNF580 protein expression in HUVECs were confirmed.
- Significant promotion of HUVEC proliferation (EdU assay), migration (wound healing and Transwell assays), and in vitro angiogenesis was observed with the composite gene vector.
Conclusions:
- The developed graphene quantum dot-based gene vector is efficient and low-toxic for targeted gene delivery to endothelial cells.
- This novel vector system significantly enhances endothelial cell proliferation, migration, and angiogenesis.
- The findings offer a promising strategy for vascular regeneration therapy and regenerative medicine applications.
