title: Magnetophoretic cell sorting is a function of antibody binding capacity.
abstract: Antibody binding capacity (ABC) is a term representing a cell's ability to bind antibodies, correlating with the number of specific cellular antigens expressed on that cell. ABC allows magnetically conjugated antibodies to bind to the targeted cells, imparting a magnetophoretic mobility on each targeted cell. This enables sorting based on differences in the cell magnetophoretic mobility and, potentially, a magnetic separation based on the differences in the cell ABC values. A cell's ABC value is a particularly important factor in continuous magnetic cell separation. This work investigates the relationship between ABC and magnetic cell separation efficiency by injection of a suspension of immunomagnetically labeled quantum simply cellular calibration microbeads of known ABC values into fluid flowing through a quadrupole magnetic sorter. The elution profiles of the outlet streams were evaluated using UV detectors. Optimal separation flow rate was shown to correlate with the ABC of these microbeads. Comparing experimental and theoretical results, the theory correctly predicted maximum separation flow rates but overestimated the separation fractional recoveries.
authors.affiliation: Department of Chemical Engineering, The Ohio State University, 140 West 19th Avenue, Columbus, Ohio 43210.
authors.forename: Kara E
authors.initials: KE
authors.lastname: McCloskey
authors.forename: Lee R
authors.initials: LR
authors.lastname: Moore
authors.forename: Mauricio
authors.initials: M
authors.lastname: Hoyos
authors.forename: Alex
authors.initials: A
authors.lastname: Rodriguez
authors.forename: Jeffrey J
authors.initials: JJ
authors.lastname: Chalmers
authors.forename: Maciej
authors.initials: M
authors.lastname: Zborowski
mesh_terms: D000915:Antibody Affinity; D003198:Computer Simulation; D004586:Electrophoresis / Q000295:instrumentation* / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005434:Flow Cytometry / Q000295:instrumentation / Q000379:methods; D006412:Hematopoietic Stem Cells / Q000145:classification* / Q000166:cytology; D006801:Humans; D018189:Immunomagnetic Separation / Q000295:instrumentation* / Q000379:methods*; D008280:Magnetics / Q000295:instrumentation*; D008954:Models, Biological