Parallelized Manipulation of Adherent Living Cells by Magnetic Nanoparticles-Mediated Forces

Area of Science:

• Biotechnology
• Regenerative Medicine
• Cellular Biology

Background:

• Remote control of cellular processes like migration and neuronal outgrowth is crucial for regenerative medicine.
• Magnetic nanoparticles offer a promising approach for non-invasive, long-range actuation of biological systems.
• Controlling cellular behavior at a subcellular level requires precise force application or localized biochemical induction.

Purpose of the Study:

• To demonstrate the remote actuation of cell migration and neurite outgrowth using magnetic forces.
• To investigate the application of forces from micro-magnetic pillars for directing cellular processes.
• To explore the potential of magnetic nanoparticle-mediated cellular control in therapeutic contexts.

Main Methods:

• Utilized passive uptake of magnetic nanoparticles by cells.
• Employed a switchable parallelized array of micro-magnetic pillars to generate controlled magnetic fields.
• Conducted live cell imaging to observe and quantify cell migration and neurite outgrowth responses.

Main Results:

• Demonstrated biased migration of adherent cells towards magnetic pillars.
• Showed reversible trapping of cells onto magnetic pillars.
• Induced directed neurite outgrowth in differentiated neuronal cells without compromising viability.
• Established that applied forces must be precisely adapted to the specific cellular process.

Conclusions:

• Magnetic micro-actuation provides a viable method for controlling cell migration and neurite outgrowth.
• Magnetically mediated forces on cellular endo-compartments likely drive plasma membrane manipulation.
• This technique holds significant potential for future applications in regenerative medicine and cellular engineering.