Freshly isolated PBMC were stained for flow cytometry as described22 (link) using antibodies to the following human surface antigens. Cells were then fixed and permeabilized with a Cytofix-Cytoperm fixation/permeabilization kit (BD) and stained with anti-survivin (91630, R&D Systems, Minneapolis, MN, USA) and isotype control (mouse IgG1κ, R&D Systems). The cells were collected in FACSCantoII flow cytometer (BD), and the data were analyzed with FlowJo software (BD, v.10.7) and fluorescence minus one controls.
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