Cell pyroptosis was measured with FAM-FLICA Caspase-1 Assay Kits (ICT, USA). According to the manufacturer's instructions, cells were incubated with 40 μl phosphate buffered saline (PH = 7.4) containing 10 μl FLICA at 37°C protected from light for 30 min and 5 μL propidium iodide. Cell pyroptosis was analyzed on a FACScalibur flow cytometer (BD Biosciences, San Jose, USA). The double-positive cells were considered to be pyroptotic cells.
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