Briefly, at a density of 1 ×10 4 cells/well THP-1 human macrophage or PBMCs were plated into 96-well plates. After the applied LPS treatment, MTT dye (5 mg/mL, 20 μL in each well) was added. After incubation for another 2-3h, The optical density (OD) of MTT at 490 nm was recorded.
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