Figure 6. The proliferation inhibition by L-MSC was mediated by TGFβ1. PBMC were cultured stimulated with mAb anti-CD3/CD28 in the absence or presence of L-MSC. Neutralization mAb anti-TGFβRII was added to the cultures of PBMC stimulated with CD3/CD28. Each bar represents the mean±SEM from three independent experiments (* p<0.05).