Engineered Nanostructured Facial Lipopeptide as Highly Efficient Molecular Transporter

Area of Science:

• Biotechnology
• Drug Delivery
• Molecular Engineering

Background:

• Intracellular delivery of hydrophilic biomacromolecules is challenging.
• Arginine-rich peptides are used as cell-penetrating transporters but face proteolytic instability.
• Existing noncovalent peptide-cargo complexes have limited stability.

Purpose of the Study:

• To engineer a protease-resistant molecular transporter for improved intracellular drug delivery.
• To overcome the limitations of oligoarginine-based transporters.
• To enhance the stability and cellular internalization of therapeutic biomacromolecules.

Main Methods:

• Designed a facial lipopeptide transporter incorporating an arginine-sarcosine-arginine moiety.
• Incorporated N-methylated sarcosine as a spacer to minimize repulsion and aggregation.
• Added stearyl moieties to facilitate cellular internalization.

Main Results:

• The designed lipopeptide demonstrated enhanced cellular internalization with fewer arginine residues compared to oligo-nona-arginine.
• Achieved improved proteolytic stability, leading to increased cargo internalization.
• The lipopeptide transporter showed superior performance over existing arginine-rich peptides.

Conclusions:

• Engineered multifunctional, nanostructured lipopeptide transporter is proteolytically stable.
• This novel transporter design significantly advances drug delivery technologies.
• The lipopeptide offers a promising platform for intracellular delivery of therapeutic biomacromolecules.