Process optimization and biocompatibility of cell carriers suitable for automated magnetic manipulation

Area of Science:

• Biotechnology
• Cell Biology
• Biomedical Sciences

Background:

• Automated cell reprogramming is crucial for advancing cell biology, biotechnology, and biomedical sciences.
• Microfluidic platforms offer unattended manipulation of adherent cells, making them ideal for cell manipulation.
• Magnetic cell carriers are being developed as vehicles for in vitro cell manipulation.

Purpose of the Study:

• To develop a magnetically driven cell carrier for in vitro cell manipulation.
• To assess the biocompatibility and impact of the magnetic carrier on Caco-2 cells.
• To optimize the carrier design for enhanced cell proliferation and differentiation.

Main Methods:

• Fabrication of magnetically driven cell carriers with nickel core and gold encapsulation.
• Evaluation of carrier quality using field emission scanning electron microscopy.
• Quantification of cell adherence, proliferation, and differentiation using Caco-2 cell line.
• Monitoring of cell morphology via immunofluorescent staining.
• Stepwise development and biocompatibility testing of carrier generations.

Main Results:

• Early carrier generations released cytotoxic nickel; complete encapsulation in gold achieved biocompatibility.
• The final carrier generation supported Caco-2 cell proliferation comparable to glass/polystyrene for up to 10 days.
• Functional cell differentiation was enhanced by over 30% compared to control surfaces.
• The developed carrier is flat, ferromagnetic, and fully biocompatible for microfluidic applications.

Conclusions:

• A novel, biocompatible magnetic cell carrier was successfully developed for microfluidic cell manipulation.
• The gold-encapsulated carrier design mitigates nickel cytotoxicity and supports robust cell growth and differentiation.
• This study provides valuable insights into the development and biocompatibility assessment of magnetic cell carriers.