Calixarene Modification Strategy for Efficient Intracellular Protein Delivery.

Area of Science:

• Biotechnology
• Materials Science
• Drug Delivery

Background:

• Intracellular protein delivery is crucial for protein-based therapies but is hindered by protein hydrophilicity and large size.
• Developing effective methods for cell membrane penetration is essential for protein drug development.

Purpose of the Study:

• To develop a novel calixarene modification strategy for efficient intracellular protein delivery.
• To demonstrate the versatility of this strategy across various proteins and its therapeutic potential.

Main Methods:

• Proteins were modified with sulfonate azocalix[4]arene (SAC4A) to create a nano-multivalent effect.
• The modified proteins were delivered into cells via clathrin-mediated endocytosis.
• In vivo antitumor efficacy was evaluated in a mouse model.

Main Results:

• The SAC4A modification strategy successfully delivered seven different proteins into cells.
• Enhanced cytotoxicity was observed for Cyt C and RNase A after SAC4A modification.
• SAC4A-modified Cyt C showed significant antitumor efficacy in mice with minimal side effects.

Conclusions:

• Calixarene modification provides a versatile platform technology for intracellular protein delivery.
• This strategy can enhance the therapeutic potential of protein drugs targeting intracellular pathways.
• The approach holds promise for developing advanced protein-based therapies.