NFKB1 and neoplasm: The inhibitors, 50 μmol/l PDTC, 100 nmol/l bortezomib, 12.5 mg/l SN50, suppressed the NF-κB expression which was stimulated by the tumor cells themselves; the degrees of inhibtion were 0.11±0.00, 0.35±0.01 and 0.31±0.03 times, respectively (P<0.05).