Purification of transiently transfected cells by magnetic affinity cell sorting
- PMID: 2840002
- DOI: 10.1016/0003-2697(88)90640-9
Purification of transiently transfected cells by magnetic affinity cell sorting
Abstract
A method was developed to purify transiently transfected HeLa cells or African green monkey kidney CV-1 cells by magnetic affinity cell sorting. Monolayer cultures were transfected with mammalian expression vectors coding for either of two novel cell surface antigens, the Tac subunit of the human IL-2 receptor or vesicular stomatitis virus G protein. During the transient expression phase, cell populations were placed in suspension and mixed with monoclonal-antibody-coated magnetic particles in the presence of a sorting solution designed to minimize nonspecific cell/cell and cell/particle interactions. Transfected cells expressing the vector-encoded cell surface antigen were then isolated by application of a magnetic field. Reconstruction experiments indicated that IL-2 receptor-positive cells were bound about 100-fold more efficiently than receptor-negative cells. In transient transfection experiments, populations of greater than 90% antigen-positive cells were reproducibly obtained.
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