ODN 1826 VacciGrade™

ODN 1826 VacciGrade™ Unit size Cat. code Docs Qty Price
CpG ODN, Class B (murine) - TLR9 agonist
1 mg

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CpG ODN, type B (murine) - TLR9-based adjuvant

CpG ODN 1826 is a synthetic immunostimulatory oligonucleotide (ODN) that contains unmethylated CpG dinucleotides.

ODN 1826 is a class B CpG ODN specific for mouse Toll-like receptor 9 (TLR9). It strongly activates B cells, weakly stimulates IFN-α secretion in pDCs, and generates Th1-dominant immune responses.


ODN 1826 VacciGrade™ is a high-quality pre-clinical grade.
ODN 1826 VacciGrade™​ is for research use only, and not for human or veterinary use.

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ODN1826 sequence: 5’-tccatgacgttcctgacgtt-3’ (20 mer)

Description: TLR9 agonist VacciGrade™

Polarization of adaptive immune response: Th1 response

Solubility: 2 mg/ml in physiological water

Working concentration: 20 - 50 μg/mouse

Quality control:

  • Sterility guaranteed
  • The absence of bacterial contamination (lipoproteins & endotoxins) has been confirmed using HEK-Blue™ TLR2 and HEK-Blue™ TLR4 cells
  • Endotoxin level < 1 EU/mg (measurement by kinetic chromogenic LAL assay)
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ODN 1826 VacciGrade™ is provided lyophilized width:

  • 1 mg (157.1 nmol) of sterile lyophilized ODN 1826 VacciGrade™
  • 10 ml sterile endotoxin-free physiological water (NaCl 0.9%)

ODN 1826 VacciGrade™ is shipped at room temperature

Upon receipt it should be stored at -20°C for up to 1 year.

Upon resuspension, prepare aliquots of ODN 1826 VacciGrade™ and store at -20°C.

Product is stable 6 months at -20°C when properly stored.

Avoid repeated freeze-thaw cycles.

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VacciGrade™ is a high-quality pre-clinical grade. VacciGrade™ products are filter-sterilized (0.2 µm) and filled under strict aseptic conditions in a clean room*. The absence of bacterial contamination is assessed by a sterility test using a pharmacopeia-derived assay. The level of bacterial contaminants (endotoxins and lipoproteins) in each lot is verified using a LAL assay and/or a TLR2 and TLR4 reporter assay.
*Except for LPS VacciGrade™, which is prepared in a laminar flow hood dedicated to LPS.

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Synthetic oligodeoxynucleotides containing unmethylated CpG motifs (CpG ODNs), such as ODN 1826, have been extensively studied as adjuvants [1].

These CpG motifs are present at a 20-fold greater frequency in bacterial DNA compared to mammalian DNA [2].

CpG ODNs are recognized by TLR9, which is expressed exclusively on human B cells and plasmacytoid dendritic cells (pDCs), thereby inducing Th1-dominated immune responses  [3].

Pre-clinical studies, conducted in rodents and non-human primates, and human clinical trials have demonstrated that CpG ODNs can significantly improve vaccine-specific antibody responses  [1].

Three types of stimulatory CpG ODNs have been identified, types A, B and C, which differ in their immune-stimulatory activities  [4-5]. Furthermore, CpG ODNs activate TLR9 in a species-specific manner  [6].

ODN 1826 is a type B CpG ODN specific for mouse TLR9. Type B CpG ODNs contain a full phosphorothioate backbone with one or more CpG dinucleotides and can strongly activate B cells  [4].

ODN 1826 has been tested as an adjuvant in numerous animal models  [7-9].

Research in mice demonstrated that ODN 1826 administration can induce the activation of antigen presenting cells8 and type I IFN anti-viral activity [8-9], indicative of a Th1 immune response.

1. Steinhagen F. et al., 2011. TLR-based immune adjuvants. Vaccine 29(17):3341-55.
2. Hemmi H. et al., 2000. A Toll-like receptor recognizes bacterial DNA. Nature 408:740-5.
3. Coffman RL. et al., 2010. Vaccine adjuvants: Putting innate immunity to work. Immunity 33(4):492-503.
4. Krug A. et al., 2001. Identification of CpG oligonucleotide sequences with high induction of IFN-alpha/beta in plasmacytoid dendritic cells. Eur J Immunol, 31(7): 2154-63.
5. Marshall JD. et al., 2005. Superior activity of the type C class of ISS in vitro and in vivo across multiple species. DNA Cell Biol. 24(2):63-72.
6. Bauer S. et al., 2001. Human TLR9 confers responsiveness to bacterial DNA via species-specific CpG motif recognition. PNAS, 98(16):9237-42.
7. Xiong Z. et al., 2008. Effective CpG immunotherapy of breast carcinoma prevents but fails to eradicate established brain metastasis. Clin Cancer Res 14: 5484-93.
8. Longhi MP. et al., 2009. Dendritic cells require a systemic type I interferon response to mature and induce CD4+Th1 immunity with poly IC as adjuvant. J Exp Med 206: 1589-602.
9. Ank MB. et al., 2008. An important role for type III interferon (IFN-lambda/IL-28) in TLR-induced antiviral activity. J Immunol 180: 2474-85.

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