CD8+ T cells from spleens and LNs of OTI × B6.SJL-Ptprca mice were positively selected using anti-CD8+ MACS Beads (Miltenyi Biotec) and labeled with CFSE as described (32 (link)). Purity was >87% as assessed by positive staining with anti-CD8α, -Vα2, and -Vβ5 antibodies. About 2 × 106 cells were injected i.v. into C57BL/6J or CD11c-DTR BM chimeric hosts bearing established B16.OVA tumors. OTI proliferation was assessed in tumor-draining LNs 6 days later.
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