Multifunctional Collagen-Like Protein as a Gene Therapy Vehicle for Biomedical Applications.

Area of Science:

• Biotechnology
• Molecular Biology
• Biomaterials Science

Background:

• Protein-based delivery systems offer advantages over viral vectors in gene therapy.
• Collagen, an extracellular matrix component, has potential for gene delivery but faces uptake limitations.
• Mussel adhesive proteins (MAPs) possess histone-like properties enabling genetic material delivery.

Purpose of the Study:

• To engineer and evaluate a novel fusion protein combining collagen-like protein (CLP) and mussel adhesive protein (MAP) for enhanced gene delivery.
• To investigate the DNA-binding ability, stability, and in vitro transfection efficiency of the CLP-MAP fusion protein.

Main Methods:

• Engineered a collagen-like protein (CLP) with G-X-Y repeats mimicking type I collagen.
• Fused CLP with mussel adhesive protein (MAP) to create the CLP-MAP recombinant protein.
• Expressed and purified the fusion protein in E. coli.
• Assessed DNA binding affinity, complex stability (serum, DNase), and in vitro transfection efficiency in NIH-3T3 cells.

Main Results:

• The recombinant CLP-MAP fusion protein was successfully expressed and purified.
• CLP-MAP demonstrated strong DNA-binding capabilities comparable to MAP.
• The protein-DNA complexes showed stability in serum and against DNase degradation.
• In vitro studies confirmed CLP-MAP's efficacy in delivering plasmid DNA into NIH-3T3 cells.

Conclusions:

• The CLP-MAP fusion protein is a stable and effective DNA-binding agent.
• CLP-MAP exhibits biocompatibility and potential as a novel, non-viral gene delivery system.
• This engineered protein holds promise for advancing gene therapy applications.