Nanoparticle-protein complexes mimicking corona formation in ocular environment

Area of Science:

• Biomaterials Science
• Nanomedicine
• Ophthalmology

Background:

• Nanoparticles interact with biological systems by forming a protein corona.
• Controlling nanoparticle-protein interactions is crucial for targeted drug delivery and therapeutic applications.
• The vitreous humor presents a unique biological environment for nanoparticle interactions.

Purpose of the Study:

• To investigate tissue-specific corona formation for controlling protein interactions with nanoparticles in vivo.
• To enhance the therapeutic efficacy of nanoparticles by mimicking in vivo corona formation processes.
• To evaluate the binding affinity and anti-angiogenic properties of engineered nanoparticle-protein complexes.

Main Methods:

• Characterization of protein corona composition on gold and silica nanoparticles in the vitreous.
• Pre-incubation of nanoparticles with selectively enriched vitreous proteins to form nanoparticle-protein complexes.
• In vitro and in vivo assessment of nanoparticle-protein complex binding to vascular endothelial growth factor (VEGF).
• Evaluation of the anti-angiogenic properties of engineered nanoparticles.

Main Results:

• Corona composition was determined by protein properties, independent of nanoparticle material or size.
• Engineered nanoparticle-protein complexes showed enhanced binding to VEGF in the vitreous compared to bare nanoparticles.
• Nanoparticle-protein complexes retained the anti-angiogenic properties of bare nanoparticles.
• Priming nanoparticles with tissue-specific proteins improved in vivo therapeutic effects.

Conclusions:

• Controlled corona formation, mimicking in vivo processes, can enhance nanoparticle therapeutic applications.
• Engineered nanoparticle-protein complexes offer a promising strategy for targeted therapies in specific biological environments.
• This approach holds potential for advancing the use of nanomaterials in local therapeutic interventions.