Immunomagnetic microfluidic integrated system for potency-based multiple separation of heterogeneous stem cells with...

Area of Science:

• Biotechnology
• Stem Cell Biology
• Microfluidics

Background:

• Pluripotent stem cells (PSCs) are crucial for regenerative medicine and drug screening.
• Efficient separation of PSCs based on potency is needed for reusage and collection of multipotent adult stem cells (MASCs).
• Existing methods like FACS and MACS have limitations in throughput, purity, or cell viability.

Purpose of the Study:

• To develop an immunomagnetic microfluidic integrated system (IM-MIS) for selective stem cell separation based on potency.
• To evaluate the performance of IM-MIS compared to existing cell separation techniques.
• To assess the impact of IM-MIS on stem cell viability and characteristics.

Main Methods:

• Developed an IM-MIS utilizing magnetic nanoparticles of two sizes and two antibodies recognizing potency-related surface markers.
• Separated stem cells based on magnetophoretic mobility within a microfluidics chip.
• Compared IM-MIS performance with Fluorescence-Activated Cell Sorting (FACS) and Magnetic-Activated Cell Sorting (MACS).

Main Results:

• IM-MIS achieved high throughput (49.5%) and purity (92.1%) in <15 minutes for 1 × 10^7 cells.
• Cell viability remained high at 89.1% post-isolation.
• IM-MIS preserved key stem cell characteristics, including differentiation potency, phenotype, genotype, and karyotype.

Conclusions:

• IM-MIS offers a superior and efficient method for stem cell separation based on potency.
• The developed system is suitable for various stem cell applications, including regenerative therapy and drug screening.
• IM-MIS presents a novel platform for developing advanced multi-separation systems for diverse stem cell needs.