Cell Apoptosis Induced by PDTC or BAY 11-7085 and Sensitivity to TNFα. (a) Apoptosis induced by PDTC or BAY 11-7085 and sensitivity to TNFα. The data are from one representative experiment out of three independent experiments. (b) Cells treated with PDTC or BAY 11-7085 were more sensitive to TNFα-mediated killing; the asterisk (*) denotes p < 0.01. (c) Down-regulation of VEGF and MMP9 expression in PDTC-treated Tb cells.