Aim To investigate the anti-inflammatory mechanism of procyanidin dimer B2(PCB2) by observing the effect of procyanidin dimer B2 on NF-κB nuclear transfer and inflammatory cytokines in the RSC-364 cell.Methods NF-κB/p65 position in the synovial cell was observed by immunofluorescence.The effect of PCB2 on expression of COX-2 mRNA was assayed by RT-PCR.Western blot assay was used to test COX-2 protein levels.Elisa testing was used to detect the concentrations of IL-1β VEGF in the cell supernatant.Results 50 ...