Flow cytometry analysis was performed as mentioned before9 (link). Briefly, For the cell apoptosis assay, A total of 1 × 106 cells were resuspended in a single cell suspension and washed two times with PBS solution. The cell apoptosis analysis was performed with the Annexin V-FITC or Annexin V-APC Apoptosis Detection Kit (BD Biosciences, San Diego, CA, USA) according to the manufacturer’s instructions. The rates of apoptosis were detected by flow cytometry (CyAn, Beckman Coulter).
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