Digital Magnetic Sorting for Fractionating Cell Populations with Variable Antigen Expression in Cell Therapy Process...

Area of Science:

• Biotechnology and Biomedical Engineering
• Immunology and Cell Biology
• Therapeutic Cell Manufacturing

Background:

• Cellular therapies show promise for treating complex diseases with lasting effects.
• Current cell purification methods, like magnetic-based sorting and fluorescence-activated cell sorting (FACS), struggle to differentiate cell populations based on surface antigen density, which is critical for optimal therapeutic phenotypes.
• Scalability and resolution are limitations in existing cell sorting technologies for advanced cell therapy manufacturing.

Purpose of the Study:

• To demonstrate the proof of concept for Digital Magnetic Sorting (DMS) as a scalable, magnetic-based cell fractionation technique.
• To enable cell sorting based on antigen density, addressing limitations of current purification methods.
• To advance cell therapy manufacturing by providing a tool for producing more potent and sustainable cellular therapies.

Main Methods:

• Developed and utilized Digital Magnetic Sorting (DMS), a novel magnetic-based cell fractionation technology.
• Applied DMS to human leukocytes, targeting the CD4 surface marker to differentiate cell populations based on antigen density.
• Validated DMS performance using flow cytometry and single-cell RNA sequencing (scRNA-seq) for cell population quantification and characterization.
• Assessed DMS throughput compared to fluorescence-activated cell sorting (FACS).

Main Results:

• DMS successfully fractionated human leukocytes into distinct CD4^Hi T cells and CD4^Low monocytes and neutrophils, as confirmed by flow cytometry and scRNA-seq.
• DMS demonstrated significantly higher throughput, processing 3-10 times faster than FACS.
• The study established DMS as a viable method for antigen density-based cell sorting.

Conclusions:

• Digital Magnetic Sorting (DMS) provides a scalable and high-throughput solution for cell purification based on antigen density.
• DMS technology can be integrated into cell therapy manufacturing processes to enhance the potency and sustainability of therapeutic products.
• This advancement in cell sorting technology has the potential to significantly impact the development and production of next-generation cellular therapies.