Nanoparticle adhesion to the cell membrane and its effect on nanoparticle uptake efficiency

Area of Science:

• Nanotechnology
• Biomaterials Science
• Cell Biology

Background:

• Nanoparticle interactions with biological systems are primarily governed by their adsorbed biomolecular corona, not the bare surface.
• Understanding nanoparticle adhesion and uptake is crucial for nanomedicine and nanotoxicology applications.

Purpose of the Study:

• To investigate how nanoparticle material and size influence adhesion to cell membranes.
• To determine the effect of the biomolecular corona on nanoparticle adhesion and subsequent cellular uptake.

Main Methods:

• Characterization of nanoparticle adhesion to cell membranes using various nanoparticle types and sizes.
• Validation of adhesion studies using quartz crystal microbalance analysis with supported lipid bilayers.
• Analysis of nanoparticle uptake as a two-step process involving adhesion and energy-dependent internalization.

Main Results:

• Protein adsorption onto nanoparticle surfaces significantly reduces adhesion compared to bare nanoparticles.
• Lowered adhesion in the presence of a biomolecular corona leads to decreased nanoparticle cellular uptake efficiency.
• The biomolecular corona can mediate specific nanoparticle-cell interactions, potentially triggering regulated uptake pathways.

Conclusions:

• The biomolecular corona plays a critical role in modulating nanoparticle-cell membrane interactions and uptake.
• Reduced non-specific adhesion due to the corona is a key factor in decreased cellular uptake.
• Future studies should evaluate nanoparticle adhesion properties alongside standard characterizations like size and charge.