On day 12, the mice were administered FITC-labeled liposomes or blank liposomes via i.t. injection and sacrificed on day 14. Single-cell suspensions of lung tissue samples were obtained as reported previously (18 (link)). The resuspended cells were stained with stain buffer containing PE-conjugated anti-mouse F4/80 antibodies at 4°C for 30 min. Finally, the samples were washed twice with PBS prior to flow cytometry analysis. Data were acquired on a MACSQuant X (Miltenyi, Bergisch-Gladbach, Germany) and analyzed using FlowJo V10 software.
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