Figure 3. C12 effect on activated CD8 T cells is NOD1- and RIP2- dependent, and is associated with activation of the NF-κB, JNK and p38 signaling pathways.

(A–B) Flow cytometry assessment of the proliferation of CFSE stained WT, NOD1^−/−, RIP2^−/−, MyD88^−/− and TRIF^−/− CD8 T cells activated for 72 h with anti-CD3, in the absence or presence of C12 or Pam. (A) The percentage of proliferating cells is indicated within the histograms. (B) The column graph represents the mean fold increase of anti-CD3 stimulated CD8 T cell proliferation in the different conditions, in comparison to the control condition anti-CD3 alone, ± SD from 3 independent experiments. (C) Determination by western blotting of IκBα, β-actin, Phospho-ERK (P-ERK), total ERK, Phospho-JNK (P-JNK), total JNK, Phospho-p38 (P-p38) and total p38 protein levels in F5 CD8 lymphoblasts cultured for 30 minutes in medium alone or with 1 nM of their specific antigenic peptide, NP68, in the absence or presence of C12, anti-CD28 or Pam. Results are representative of 3 independent experiments.