Whole blood cells were treated with LPS in the presence of of 0, 0.001, 0.01, 0.1 and 1.0 mg/ml Tyloxapol or 3% and 7% NaCl for 24 hrs at 37°C and 5% CO2. 7-Amino-actinomycin D (7-AAD) staining was used for the detection of dead cells. Therefore, samples were stained with 7AAD solution (Calbiochem, San Diego, CA) at 4°C protected from light for 20 minutes and analysed by flow cytometry (FACSVerse, Becton Dickinson, San Jose, CA, USA).
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