LPS-EB Biotin

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TLR4 Agonist - Biotinylated ultrapure LPS from E. coli 0111:B4
LPS-EB Biotin

LPS-EB Biotin is biotinylated ultrapure lipopolysaccharide (LPS) from the Gram-negative bacteria E. coli 0111:B4.

LPS is recognized by toll-like receptor 4 (TLR4) which interacts with three different extracellular proteins: LPS binding protein (LBP), CD14 and, myeloid differentiation protein 2 (MD-2), to induce a signaling cascade leading to the activation of NF-κB and the production of proinflammatory cytokines [1, 2]. 

Most LPS preparations on the market are contaminated by other bacterial components, such as lipoproteins, thus activating TLR2 signaling as well as TLR4 signaling. The ultrapure preparation that InvivoGen provides only activates the TLR4 pathway.

In this product, biotin has been bound to LPS’s oxidized-carbohydrates using biotin-LC-hydrazide as previously described [3]. The labeled ligand retains the biological activity of LPS. LPS‑EB Biotin can be used for the detection of LPS binding sites by cytometry or fluorescence microscopy.  

Key features of LPS-EB Biotin:

  • Highly specific and potent TLR4 agonist
  • Ultrapure grade of LPS that only activates TLR4
  • Each lot is functionally tested

References:

  1. Kuzmich, N.N. et al., 2017. TLR4 Signaling Pathway Modulators as Potential Therapeutics in Inflammation and Sepsis. Vaccines (Basel) 5unol. 165(2):618-22.
  2. Hirschfeld M. et al., 2000. Cutting edge: repurification of lipopolysaccharide eliminates signaling through both human and murine toll-like receptor 2. J Immunol. 165(2):618-22.
  3. Luk JM. et al., 1995. Biotinylated lipopolysaccharide binds to endotoxin receptor in endothelial and monocytic cells. Anal Biochem 232:217.

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