Modifying plasmid-loaded HSA-nanoparticles with cell penetrating peptides - Cellular uptake and enhanced gene...

Area of Science:

• Biotechnology
• Nanomedicine
• Gene Therapy

Background:

• Viral gene therapy vectors face clinical limitations due to side effects like oncogene activation and immune responses.
• Non-viral gene delivery methods have historically shown lower transfection efficiencies, hindering their development.
• Human serum albumin nanoparticles offer a biocompatible, biodegradable, and non-toxic platform for gene delivery.

Purpose of the Study:

• To develop and evaluate novel non-viral gene delivery nanoparticles.
• To enhance gene transfection efficiency using surface-modified nanoparticles.
• To investigate the cellular uptake mechanisms of peptide-modified nanoparticles.

Main Methods:

• Plasmid DNA was loaded into human serum albumin nanoparticles.
• Nanoparticle surfaces were modified with cell-penetrating peptides (Tat, R9, EB1).
• HEK 293T cells were used to assess transfection efficiency and cellular uptake pathways via inhibitor studies.

Main Results:

• Surface modification with cell-penetrating peptides significantly increased nanoparticle transfection efficiency.
• The developed nanoparticles demonstrated higher transfection rates compared to free DNA and polyplexes.
• Inhibitor studies provided insights into the cellular uptake mechanisms mediated by the peptides.

Conclusions:

• Human serum albumin nanoparticles functionalized with cell-penetrating peptides represent a promising non-viral gene delivery system.
• This approach offers a potentially safer and more effective alternative to viral vectors for gene therapy.
• Further research into peptide-mediated uptake mechanisms can optimize non-viral gene delivery strategies.