Nucleic Acid Adjuvants

HSV-60mer sodium is a 60 bp double-stranded DNA oligonucleotide derived from the HSV-1 genome, and also an IFNβ inducer. HSV-60mer sodium colocalizes with endogenous cytoplasmic IFI16 in immune cells. HSV-60mer sodium activates the transcription factors IRF3 and NF-κB, induces the production of proinflammatory cytokines, and inhibits HSV-1 replication in immune cells. HSV-60mer sodium can be used in studies related to herpes simplex virus type 1 infection.

Vidutolimod (CMP-001) is a virus-like particle containing a TLR9 activator. Vidutolimod induces human peripheral blood mononuclear cells to secrete IFNα, and upregulates the gene expression of CXCL10, PDL1, IDO and CD80. Vidutolimod activates TLR9, which in turn triggers plasmacytoid dendritic cell activation, production of IFNγ and TNFα, induction of CXCL10, and recruitment of antitumor T cells. Vidutolimod causes influenza-like symptoms, hypotension and tumor regression, and its activity depends on the presence of anti-Qβ antibodies. Vidutolimod modulates monocyte function, promotes CD4 T cell proliferation, and activates multiple immune cell types in an environment with anti-Qβ antibodies. Vidutolimod prolongs the survival of tumor-bearing mice. Vidutolimod is used in research related to advanced melanoma, head and neck squamous cell carcinoma, and advanced non-small cell lung cancer.

ODN 2336 is a A-Class CpG ODN (oligodeoxynucleotides), is a potent TLR9 agonist. ODN 2336 induces the production of IFN-α. ODN 2336 up-regulates the expression of IP-10 mRNA and IL-18 mRNA. ODN 2336 can be used as adjuvant of vaccines.

2'2'-cGAMP, a synthetic CDN, binds STING in the immune response, inducing IFN-β. 2'2'-cGAMP binds weaker binding to STING than 2'3'-cGAMP (HY-100564) but stronger than other CDNs.

cAIMP (Cyclic Adenosine-Inosine Monophosphate) is an effective synthetic cyclic dinucleotide. cAIMP activates IRF and NF-κB in the THP1 human monocyte reporter cell line (THP1-Dual). cAIMP induces the secretion of IFNs and pro-inflammatory cytokines in vitro in human blood, with an EC₅₀ of 6.4 μmol/L.

Cyclic-di-GMP sodium is a STING agonist and a bacterial second messenger that coordinates different aspects of bacterial growth and behavior, including motility, virulence, biofilm formation, and cell cycle progression. Cyclic-di-GMP sodium has anti-cancer cell proliferation activity and also induces elevated CD4 receptor expression and cell cycle arrest. Cyclic-di-GMP sodium can be used in cancer research.