Novel gene transfer vectors based on artificial recombinant multi-functional oligopeptides.

Area of Science:

• Biotechnology
• Gene Therapy
• Nanomedicine

Background:

• Viral vectors are efficient gene delivery tools but raise safety concerns.
• Developing safe and effective non-viral gene delivery systems is crucial for gene therapy.

Purpose of the Study:

• To design and synthesize novel peptide-based gene carriers (ARMs) mimicking viral vector functions.
• To evaluate the in vitro transfection efficiency, cell adhesion, cellular uptake, and cytotoxicity of these ARMs.

Main Methods:

• Synthesis of three artificial recombinant multi-block oligopeptides (ARMs): (C(18))(2)KH(4)R(8)GDS (ARM1), AcKH(4)R(8)GDS (ARM2), and (C(18))(2)KH(4)R(8) (ARM3).
• In vitro transfection efficiency assessment in 293T, HepG2, and HeLa cell lines.
• Confocal laser scanning microscopy to observe cellular and nuclear uptake of peptide/pDNA complexes.
• Cytotoxicity assays to determine the safety profile of the ARMs.

Main Results:

• ARM1 and ARM3, featuring double hydrophobic aliphatic tails, exhibited significantly enhanced transfection efficiency.
• The RGDS sequence conjugation did not notably alter cell adhesion across the tested cell lines.
• Confocal microscopy confirmed successful entry of peptide/pDNA complexes into cells and nuclei.
• All synthesized ARMs demonstrated low cytotoxicity.

Conclusions:

• Artificial recombinant multi-block oligopeptides (ARMs) represent a promising class of non-viral vectors for gene delivery.
• The presence of hydrophobic tails enhances transfection efficiency, suggesting a potential for optimized vector design.
• ARMs show potential for safe and effective gene therapy applications, offering an alternative to viral vectors.