As shown in Figures 5b and c, the BAFF-neutralizing antibody, but not control IgG2B, repressed the MΦ-mediated bort resistance of MM cells (ARP-1 and RPMI8226) and partially restored MM cell sensitivity to bort in direct co-culture with MΦs. This evidence concerns the gene TNFSF13B and Miyoshi myopathy.