Multivalent Protein-Loaded pH-Stable Polymersomes: First Step toward Protein Targeted Therapeutics

Area of Science:

• Biomaterials Science
• Nanotechnology
• Drug Delivery

Background:

• Development of synthetic platforms for artificial organelles and multivalent protein therapeutics is crucial.
• Stimuli-responsive carriers are needed for sequential protein loading and post-functionalization.
• Polymersomes offer excellent characteristics for specific protein transport and integration within vesicles.

Purpose of the Study:

• To fabricate multivalent, pH-responsive, and pH-stable polymersomes for protein therapeutics.
• To combine therapeutic action with targeted delivery using model proteins like human serum albumin and avidin.
• To demonstrate the targeting capabilities of functionalized polymersomes for cell surface receptors.

Main Methods:

• Fabrication of multivalent protein-loaded, pH-responsive polymersomes.
• Characterization using dynamic light scattering, cryo-TEM, and fluorescence spectroscopy.
• Validation of molecular parameters via asymmetrical flow-field flow fractionation with light scattering.

Main Results:

• Successful creation of protein-loaded, pH-responsive, and pH-stable polymersomes.
• Demonstrated molecular recognition and targeting of biotinylated cell surface receptors using avidin-functionalized polymersomes.
• Validated the structural and functional properties of the multivalent biohybrids.

Conclusions:

• Protein-loaded polymersomes offer a versatile platform for sophisticated biomolecular nanoobjects.
• These nanocarriers present new opportunities in the field of protein therapeutics, including extracellular matrix applications.
• The developed system enables combined therapeutic action and targeted delivery for enhanced treatment strategies.