Fig. 3From: Clearance of senescent cells with ABT-263 improves biological functions of synovial mesenchymal stem cells from osteoarthritis patientsApoptosis assay. a Flow cytometry analysis of annexin V/propidium iodide (PI). Dot plots show the percentages of viable (Q4), early apoptotic (Q1), and late apoptotic (Q2) cells. b The ratio of early, late, and total apoptotic cells in the control and ABT-263 groups. c Co-staining of senescence-associated beta-galactosidase (blue) and cleaved caspase-3 (brown) after the treatment with ABT-263Back to article page