Thy1.1+ pmel T cells were harvested from the spleens of Pmel transgenic mice and negatively selected for CD8 with a magnetic bead enrichment method (STEMCELL Technologies). Cells were labeled with 5 μM of CSFE (Thermo Fisher) and washed 3 times with PBS and injected i.v. at 1 × 105 cells per mouse.
For adoptive transfer of NK cells and macrophages, endogenous cells were depleted with neutralizing antibodies against NK cells and macrophages in B16F10-bearing Fcgr3-KO or WT mice 1 day before the treatment. Syngeneic WT CD45.1+ or Ifng-KO NK cells and macrophages were harvested and selected using a magnetic bead enrichment method (Miltenyi Biotec) and Ifng-KO cells were labeled with 5 μM CellTrace Violet or CFSE (Thermo Fisher). NK cells and macrophages were then i.v. injected at 1 × 106 cells (Tai et al., 2013 ) and 3–4 × 106 cells (Hagemann et al., 2008 (link)) per mouse, respectively.
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