Dynamic Interplay between Deformability and Activity in Cell Entry of Soft Active Nanoparticles.

Area of Science:

• Biophysics
• Cellular Biology
• Nanotechnology

Background:

• Cellular uptake is crucial for biological processes and drug delivery.
• Nanoparticle deformability is a known factor in cellular uptake.
• Nonequilibrium interactions at cell-nanoparticle interfaces are not well understood.

Purpose of the Study:

• To investigate the role of nanoparticle rigidity in nonequilibrium cellular uptake.
• To explore the dynamics of soft elastic active nanoparticles during endocytosis.
• To understand the interplay between nanoparticle deformability, activity, and cellular interactions.

Main Methods:

• Computational simulations of soft elastic active nanoparticles.
• Analysis of endocytosis processes.
• Development of analytical theories for nonequilibrium physics.

Main Results:

• Uptake efficiency exhibits a nonmonotonic dependence on nanoparticle rigidity.
• Active nanoparticles show different behavior compared to passive ones.
• A minimum activity threshold is identified for cellular uptake.
• Rigidity influences nanoparticle orientation during uptake.

Conclusions:

• Nanoparticle deformability significantly regulates nonequilibrium interactions during cellular uptake.
• The findings provide a deeper understanding of the physics governing cell-nanoparticle interfaces.
• This research offers potential for designing soft active systems for biomedical applications.