1. Gr-1+ MDSC in tumor-bearing mice produce IL-6.
Gr-1+ MDSC in tumor-bearing mice produce IL-6. A, quantitation of IL-6 in tumor-bearing IL-6+/+ or IL-6−/− mice treated with anti-Gr-1 antibody or anti-Ly6G antibody. Antibody treatment was carried out 20 days after tumor inoculation, and serum was harvested 5 days after antibody treatment. Each point represents an individual animal. *, P < 0.05; ***, P < B, mice were inoculated with MCA205-OVA, and tumor progression was monitored. C, splenocytes of tumor-free or tumor-bearing mice were cultured with Brefeldin A for 12 hours. IL-6 production in Gr-1+CD11b+ cells was measured by intracellular staining. The frequencies of Gr-1+CD11b+ cells in spleen (top) and IL-6+ cells in Gr-1+CD11b+ gated populations are shown (bottom). The percentage values in brackets represent the frequencies of IL-6+ cells in Ly6G+ or Ly6G− cells.
Hirotake Tsukamoto et al. Cancer Immunol Res 2013;1:64-76
©2013 by American Association for Cancer Research