Influence of geometric nanoparticle rotation on cellular internalization process.

Area of Science:

• Biophysics
• Nanotechnology
• Cell Biology

Background:

• Cellular internalization, including endocytosis, is crucial for biological processes.
• Understanding nanoparticle rotation during cellular uptake is vital but mechanistically unclear.
• Geometric nanoparticles offer unique properties for cellular interactions.

Purpose of the Study:

• To investigate the rotational dynamics of geometric nanoparticles during cellular internalization.
• To elucidate the mechanisms governing nanoparticle rotation and its relationship with membrane interactions.
• To provide insights for designing nanoparticles as drug delivery vectors.

Main Methods:

• Dissipative particle dynamics simulations were employed.
• Analysis of nanoparticle rotational modes during adhesion and membrane wrapping.
• Examination of factors influencing rotation, such as geometric symmetry, orientation, and ligand-receptor affinity.

Main Results:

• Multiple rotational modes of geometric nanoparticles were observed during internalization.
• Breaking geometric symmetry is critical for nanoparticle rotation.
• Nanoparticle orientation and ligand-receptor affinity modulate rotational behavior.
• Rotational modes influence membrane perturbation and nanoparticle-membrane configuration.
• Simulations revealed a link between rotational dynamics and cellular internalization outcomes.

Conclusions:

• Nanoparticle rotation is a complex phenomenon influenced by geometric symmetry, orientation, and membrane interactions.
• The rotational mode of nanoparticles dictates their impact on cell membranes during internalization.
• Findings offer a new strategy for designing effective nanoparticle-based drug delivery systems.