To generate THP-1 derived macrophages (TDM), THP-1 cells (in 0.4 μm transwell insert for 6-well plate) were treated with 10 ng/ml phorbol 12-myristate 13-acetate (PMA) for 24 hours. Then, the cells were cultured with 25 ng/ml IL-4 or LPS for another 48 hours to generate THP-1-derived macrophages. Meanwhile, THP-1 cells were treated with 10 ng/ml phorbol 12-myristate 13-acetate (PMA) for 24 hours before further treatment (B. thetaiotaomicron, heat killed B. thetaiotaomicron, B. thetaiotaomicron culture medium or acetic acid).
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