Mature cells of the body can be reprogrammed towards a pluripotent state by forced expression of the transcription factors Oct-4, Klf-4, Sox2, and C-Myc (OKSM) at very low efficiency. To study the reprogramming process in detail the rare intermediates of the reaction need to be separated from the bulk population. Using a genetically engineered reprogrammable mouse strain we describe how to isolate intermediates from reprogramming cultures of mouse embryonic fibroblasts via antibody labeling of cell surface markers and fluorescence-activated cell sorting (FACS).
Keywords: Cell surface marker; Fluorescence-activated cell sorting; Induced pluripotent stem cells; Reprogrammable mouse model; Reprogramming intermediates.