OBJECTIVEThe present study was to evaluate the effects of nuclear factor of kappa B decoy oligodeoxynucleotides on murine multiple myeloma models.

METHODSThe severe combined immunodeficient mice were injected subcutaneously with RPMI-8226 myeloma cells. When tumors became measurable, the mice were divided into 2 treatment groups who respectively received 5 µg/g or 10 µg/g liposome-NF-κB decoy ODN compounds, and one control group was selected; the control group received 10 µg/g liposome-NF-κB mutant decoy ODN compounds, twice per week for 4 weeks. The mice were killed when they died or the tumor diameter became >2 cm.

RESULTSThe liposome-NF-κB decoy ODN could efficiently suppress NF-κB DNA binding activity and inhibited the expression of IL-6. As compared with the control group, the two liposome-NF-κB decoy ODN-treated groups showed more remarkably survival time and smaller tumor volume.

CONCLUSIONIn vivo transfection of NF-κB decoy ODN may provide a new therapeutic strategy for multiple myeloma.