in basal DMEM, pH 6.8 or 7.4, for 24 h. Cells were then treated with Fc blocking
antibody (purified anti-mouse CD16/32, BD) for 15 mins and stained with
anti-F4/80-BV421 (clone BM8, Biolegend), anti-CD206-APC (clone C068C2,
Biolegend), anti-CD301(Mgl1)-PE (clone LOM-14, Biolegend), anti-MHC II-PE-Cy7
(clone M5/114.15.2, Biolegend) and anti-CD86-PE-Cy5 (clone GL1, eBioscience)
antibodies for 30 min on ice in dark. To analyze mitochondria, live cells were
stained with MitoTracker™ Green FM,
MitoTracker™ Red CMXRos and MitoSOX™ Red
Mitochondrial Superoxide Indicator (Invitrogen) to determine mitochondrial mass,
inner membrane potential and reactive oxygen species (ROS) respectively. After
wash, cell fluorescence was measured using flow cytometry (BD FACSCelesta) and
the data were analyzed using Flow Jo software (TreeStar, Inc).