Fig. 2

Vaccinated animal sera had increased IgG antibodies to peptides centered at mutation sites in 4T1. a-f Data are from five independent pairs of IgG arrays reacted with pooled naïve or vaccinated mouse serum. Each array consists of 151 15mer peptides printed in triplicate and centered at WT autoantigen and SNV neoantigen mutation-sites in 4T1. a Average serum IgG fluorescence signal intensity versus 15mer peptides centered at WT versions of listed 4T1 mutation-sites in naïve and vaccinated animals sorted by the combined WT and SNV IgG signals observed in naïve animals. b Average serum IgG fluorescence signal intensity versus 15mer peptides centered at SNV versions of listed 4T1 mutation-sites in naïve and vaccinated animals sorted by the combined WT and SNV IgG signal observed in naïve animals. c-d Data are plotted as average values, but statistics are computed from all individualized pairs of experimental values. c Vaccinated animals demonstrated increased serum IgG signal intensity to a WT and SNV 15mer peptides (P < 0.0001) by Wilcoxon matched-pairs signed rank test, (d) but these observed increases in IgG signal intensity from vaccine groups were not significantly higher for SNV peptides than WT peptides (P = 0.26) by Wilcoxon matched-pairs signed rank test. However, there are stronger IgG signal intensities for SNV neoantigens than paired WT autoantigens in serum from both (e) naïve animals (P < 0.0001), and (f) vaccinated animals (P < 0.0001) by Wilcoxon matched-pairs signed rank test