NFKBIB and neuroblastoma: Since IκBα, IκBβ, ABIN-1 and ABIN-2 are known negative regulators of NF-κB [28]–[30], and in light of our previous studies demonstrating diminished expression of these negative regulators of NF-κB signaling in MPM and MB cells that were exposed to CFM-4 [14], [15], here we tested whether treatments of NB cells with CFM-4 or CFM-5 also reduced expression of IκBα, IκBβ, ABIN1 and ABIN2 proteins.