Nanoparticle administration method in cell culture alters particle-cell interaction

Area of Science:

• Biomedical Nanotechnology
• Soft Matter Physics
• Cellular Biology

Background:

• Biomedical nanoparticle research demands interdisciplinary knowledge.
• Experimental details, like particle administration, can be overlooked.
• Understanding in vitro techniques is crucial for reproducible results.

Purpose of the Study:

• To investigate how nanoparticle administration methods in 2D cell culture influence experimental outcomes.
• To determine the effect of particle delivery techniques on nanoparticle-cell interactions.
• To elucidate the role of the protein corona in mediating these interactions.

Main Methods:

• Gold nanoparticles coated with poly(vinylpyrrolidone) were used.
• Nanoparticles were administered to J774A.1 macrophage cultures via bolus, aspirated bolus, or pre-mixed methods.
• Particle-cell interactions were quantified using inductively coupled plasma-optical emission spectroscopy.
• In vitro sedimentation, diffusion, and dosimetry modeling was employed.

Main Results:

• Concentrated bolus administration led to greater particle-cell interaction compared to pre-mixing.
• Spectroscopy indicated that protein corona formation is influenced by administration method.
• Modeling clarified particle deposition phenomena at the cellular interface.

Conclusions:

• The method of nanoparticle administration in vitro significantly affects particle-cell interactions, including adsorption and uptake.
• Initial exposure conditions dictate protein corona formation, which subsequently mediates cellular interactions.
• Careful consideration of nanoparticle delivery is essential for accurate in vitro studies.