A single-cell suspension of co-culture cells and grafted corneas was prepared as previously described7 (link),8 (link),48 (link). To avoid non-specific staining, the cells were blocked with an anti-FcR-blocking antibody (eBioscience, San Diego, CA, USA). The isolated cells were stained with the following antibodies: FITC-anti-CD4 (RM4-5), and anti-IFN-γ (XMG1.2) antibodies (BioLegend, San Diego, CA, USA). The stained cells were examined using flow cytometry and the data were analyzed using FlowJo software X 10.5.3 (FlowJo LLC, Ashland, OR, USA).
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