Intracellular peptide delivery using amphiphilic lipid-based formulations

Area of Science:

• Biochemistry
• Molecular Biology
• Pharmaceutical Sciences

Background:

• Peptides are versatile biochemical and pharmaceutical tools with diverse applications, including acting as ligands, transcription factors, and immunosuppressants.
• Most therapeutic peptide targets are intracellular, necessitating efficient crossing of the plasma membrane to reach the cytoplasm.
• The physicochemical properties of peptides often hinder their direct cellular uptake, requiring specialized delivery systems.

Purpose of the Study:

• To introduce novel biological tools designed to improve the intracellular delivery of peptides.
• To develop delivery vehicles capable of overcoming the barrier of the plasma membrane for peptide therapeutics.
• To demonstrate the efficacy of these new delivery systems for various peptide cargos.

Main Methods:

• Design and synthesis of two complementary types of amphiphilic molecules based on electrostatic interactions.
• Utilizing these amphiphilic molecules as delivery vehicles for peptide cargo.
• Employing fluorescently labeled peptides to track and confirm successful intracellular delivery.

Main Results:

• Successful delivery of a diverse range of fluorescently labeled peptides into the cytosol using the designed vehicles.
• Demonstration of effective intracellular peptide transport facilitated by the amphiphilic delivery systems.
• Validation of the electrostatic interaction principle for targeted peptide delivery.

Conclusions:

• The developed amphiphilic molecules represent effective tools for enhancing intracellular peptide delivery.
• This approach broadens the potential applications of peptides in medicine and research by enabling cytoplasmic access.
• Combining peptides with these novel delivery vehicles offers a promising strategy for future therapeutic interventions.