In vitro induction of B7-H6 transcripts.B7-H6 mRNA is upregulated in PBMCs during activation by (A) TLR ligands, (B) TNFα, or (C) IL-1β. Control cells were treated with medium only. Data show fold induction of B7-H6 mRNA in treated cells as compared with untreated control cells at the indicated time points. Data correspond to a pool of 3 independent experiments.