Figure 5

Adoptive transfer of immune plasma. The adoptive transfer of 200 μl of immune plasma simultaneously administered i.p. together with 3 × 10³ B16 F0 cells had only a marginal if any effect on tumor growth in comparison to the transfer of naïve plasma: Median survival of mice (n = 7) was 25 versus 22 days (log-rank test, p = 0.044). The inlet figure demonstrates that 90% of B16 F0 cells were stained positive by the mouse immune plasma. The experiment was once repeated with similar results.