isolated from mice, as described previously [30 (link), 31 (link)]. The cells were washed, treated with erythrocyte lysis
buffer, and resuspended in PBS supplemented with 3% fetal bovine serum for flow cytometry analysis. Cells were labeled with the following antibodies purchased from eBioscience (San Diego,
CA, USA): phycoerythrin (PE)-conjugated anti-Ly6G (Cat 12-9668-82), PE-conjugated anti-CD11b (Cat 12-0112-82), FITC-conjugated anti-F4/80 (Cat 11-4801-82), and allophycocyanin-conjugated
anti-CD45 (Cat 17-0451-82). The cells were examined by flow cytometry using a NovoCyte flow cytometer (ACEA Biosciences Inc., San Diego, CA, USA).