Macrophages were isolated from peritoneal exudate using an EasySep™Biotin Positive Selection Kit and Anti-Mouse F4/80 Antibody (both from StemCell Technologies, Vancouver, BC, Canada). The macrophages were cultured in RPMI 1640 (Sigma-Aldrich, St. Louis, MO, USA) and supplemented with 10% (v/v) heat-inactivated, endotoxin-free fetal bovine serum (FBS) (Hyclone, GB), 20 mM HEPES (Sigma-Aldrich, St. Louis, MO, USA), 50 mM mercaptoethanol (Sigma-Aldrich, St. Louis, MO, USA), 2 mM L-glutamine (Sigma-Aldrich, St. Louis, MO, USA), and 50 μg/mL gentamycin.
THP-1Blue cells obtained from InvivoGen (San Diego, CA, USA) [45 (link)] and human monocyte–macrophage MonoMac-6 cells (Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Braunschweig, Germany) [46 (link)] were cultured at 37 °C in a humidified atmosphere containing 5% CO2, as reported previously.