Antigen expression was performed as previously described [14 (link)] and assessed with FACSCanto II instrument (Becton Dickinson, Franklin Lakes, NJ, USA) and by FACSDiva software 6.0 (Becton Dickinson). Briefly, at passage 1, 0.5–1 × 105 of MSCs for each antigen were washed with PBS, centrifuged, and incubated in flow cytometry buffer, adding fluorescein isothiocyanate (FITC)-conjugated antibody against CD-31, 45, 34, 44, 73, 90, and 105. FITC-conjugated nonspecific immunoglobulin G (IgG) was used as control (Bio-Legend, San Diego, CA, USA).
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