A novel multi-functional chimeric peptide for enhanced safe gene delivery in immunotherapy

Area of Science:

• Biotechnology
• Molecular Biology
• Nanotechnology

Background:

• Chimeric peptides offer advantages over viral vectors for gene delivery, including safety and targeting.
• Current chimeric peptides require enhanced gene transfer efficiency for broader application.

Purpose of the Study:

• To design and characterize a novel multi-functional chimeric peptide (CTATMPG2H) for enhanced gene delivery.
• To evaluate the gene transfer efficiency and safety of CTATMPG2H in cell lines and dendritic cells.

Main Methods:

• CTATMPG2H was synthesized, purified, and characterized using techniques like gel retardation, CD spectropolarimetry, TEM, DLS, and zeta potential analysis.
• Gene transfer efficiency was assessed in HEK293T cells and mouse bone marrow-derived dendritic cells (BMDCs).
• In silico analysis investigated the interactions within peptide-pDNA complexes.

Main Results:

• CTATMPG2H demonstrated a safe gene transfer profile comparable to MiRGD and Polyethyleneimine (PEI).
• Flow cytometry revealed up to 48% gene transfer rate to dendritic cells with approximately 80% cell viability.
• In silico studies confirmed enhanced stability and binding affinity of CTATMPG2H-pDNA complexes due to synergistic interactions.

Conclusions:

• CTATMPG2H is a promising multi-functional chimeric peptide for safe and efficient gene delivery.
• The peptide's design facilitates targeting of cells via various endocytosis mechanisms.
• This research supports future in vivo studies and clinical applications for advanced gene therapy strategies.