ODN D-SL03 sodium is a C class CpG oligonucleotides, and can induce stimulate PBMCs to produce high level of IFN-α. ODN D-SL03 sodium can activate human B cells, NK cells and mononuclear cells and up-regulate expression of CD80, CD86 and HLA-DR on the surface of subsets in human PBMCs. ODN D-SL03 sodium also can inhibit the growth of the tumor. ODN D-SL03 sequence: 5′-tcgcgaacgttcgccgcgttcgaacgcgg-3′^[1].