Apoptosis was induced by PTX (0.25 and 2 μM) with or without EMSO (130 and 150 μM) co-treatment for 48 h each. Apoptosis detection was carried out with Annexin V-FITC and Propidium Iodide (PI) double staining assay kit (KeyGen Biotech, China), following the manufacturer’s instruction. Apoptotic cells were uncovered using flow cytometry (BD Bioscience, USA). Data acquisition and analysis were done with CellQuest V3.3 (BD Bioscience, USA).
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