Mouse TLR7 ELISA Kit (Colorimetric)

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ELISA: Mouse TLR7 ELISA Kit (Colorimetric) [NBP2-76573] - Standard Curve Reference

Product Details

Summary
Reactivity MuSpecies Glossary
Applications ELISA
Suitable Sample Type
Serum, plasma and other biological fluids
Standard Curve Range
0.31 - 20 ng/mL
Sensitivity
0.19 ng/mL

Order Details

Mouse TLR7 ELISA Kit (Colorimetric) Summary

Specificity
This kit recognizes Mouse TLR7 in samples. No significant cross-reactivity or interference between Mouse TLR7 and analogues was observed.
Standard Curve Range
0.31 - 20 ng/mL
Sensitivity
0.19 ng/mL
Assay Type
Sandwich-ELISA
Inter-Assay
CV% < 4.4%
Intra-Assay
CV% < 5.08%
Spike Recovery
84-106%
Sample Volume
100 uL
Kit Type
ELISA Kit (Colorimetric)
Gene
TLR7

Applications/Dilutions

Dilutions
  • ELISA

Packaging, Storage & Formulations

Storage
Storage of components varies. See protocol for specific instructions.

Kit Components

Components
  1. Biotinylated Detection Ab Diluent
  2. Certificate of Analysis
  3. Concentrated Biotinylated Detection Ab (100×)
  4. Concentrated HRP Conjugate (100×)
  5. Concentrated Wash Buffer (25×)
  6. HRP Conjugate Diluent
  7. Micro ELISA Plate(Dismountable)
  8. Plate Sealer
  9. Product Description
  10. Reference Standard & Sample Diluent
  11. Reference Standard
  12. Stop Solution
  13. Substrate Reagent

Alternate Names for Mouse TLR7 ELISA Kit (Colorimetric)

  • TLR7
  • toll-like receptor 7

Background

Toll-like receptor 7 (TLR7) is a type I transmembrane protein expressed on the surface of endosomes and has a role in pathogen-associated molecular patterns (PAMPs) recognition and host defense (1-3). TLR7 is primarily expressed in the brain, placenta, spleen, stomach, and lungs (4). TLR7 recognizes microbial single stranded RNA (ssRNA), specifically guanosine and its derivatives (1-3). Human TLR7 cDNA encodes a 1049 amino acid (aa) protein with a theoretical molecular weight (MW) of 120.9 kDa (4). The TLR7 protein consists of a signal sequence, an 813 aa extracellular domain containing leucine-rich repeats (LRRs) which form a horseshoe-like shape, a 21 aa transmembrane domain, and a 189 aa cytoplasmic domain with cytosolic Toll-interleukin-1 receptor homology (TIR) domains (1,2,4). TLR7 and its fellow subfamily members, TLR8 and TLR9, possess a characteristic Z-loop between two LRRs with proteolytic Z-loop processing required for TLR activation (2). Z-loop cleavage in TLR7 allows for guanosine and uridine-rich ssRNA binding to the 1st and 2nd ligand binding site, respectively (2). The TIR domain associates with the adaptor protein myeloid differentiation primary response protein (MyD88) to initiate downstream signaling (1-3,5,6). Following activation by PAMPs, TLR7 dimerizes and bound MyD88 interacts with interleukin-1 receptor-associated kinase-4 (IRAK-4) (1,5). Together the complex recruits IRAK-1 and IRAK-2, which become phosphorylated, and interact with tumor necrosis factor receptor-associated factor 6 (TRAF6) (1,5). TRAF6 induces the activation of mitogen-activated protein kinase (MAPK), nuclear factor-kappaB (NF-kappaB), and interferon-regulatory factor 7 (IRF7), leading to interferon production and pro-inflammatory cytokine secretion associated with immune response (1,5).

While TLRs play an important role in innate immune response, dysfunction in the TLR-MyD88 signaling cascade has also been reported in various autoimmune disorders (5,6). Elevated expression of TLR7 is associated with increased risk of system lupus erythematosus (SLE), an autoimmune disease involving B cell hyperactivity (6,7). Studies involving mouse models has also found that increased TLR7 expression predisposes mice to a lupus-like disease (7). Therapeutics targeting TLR7 have been developed to either enhance or inhibit its activity depending on the circumstance. For example, TLR7 agonists such as imiquimod, resiquimod, and 852A are used to increase TLR7 activity for treatment of cancers and to fight viral infections (7,8). On the other hand, TLR7 antagonists inhibit its activation and have been developed to combat chronic immune stimulation as seen in inflammatory and autoimmune diseases (8).

References

1. Petes C, Odoardi N, Gee K. The Toll for Trafficking: Toll-Like Receptor 7 Delivery to the Endosome. Front Immunol. 2017;8:1075. https://doi.org/10.3389/fimmu.2017.01075

2. Maeda K, Akira S. TLR7 Structure: Cut in Z-Loop. Immunity. 2016;45(4):705-707. https://doi.org/10.1016/j.immuni.2016.10.003

3. Krieg AM, Vollmer J. Toll-like receptors 7, 8, and 9: linking innate immunity to autoimmunity. Immunol Rev. 2007;220:251-269. https://doi.org/10.1111/j.1600-065X.2007.00572.x

4. Uniprot (Q9NYK1)

5. Zheng C, Chen J, Chu F, Zhu J, Jin T. Inflammatory Role of TLR-MyD88 Signaling in Multiple Sclerosis. Front Mol Neurosci. 2020;12:314. https://doi.org/10.3389/fnmol.2019.00314

6. Chi H, Li C, Zhao FS, et al. Anti-tumor Activity of Toll-Like Receptor 7 Agonists. Front Pharmacol. 2017;8:304. https://doi.org/10.3389/fphar.2017.00304

7. Fillatreau S, Manfroi B, Dorner T. Toll-like receptor signalling in B cells during systemic lupus erythematosus. Nat Rev Rheumatol. 2021;17(2):98-108. https://doi.org/10.1038/s41584-020-00544-4

8. Patinote C, Karroum NB, Moarbess G, et al. Agonist and antagonist ligands of toll-like receptors 7 and 8: Ingenious tools for therapeutic purposes. Eur J Med Chem. 2020;193:112238. https://doi.org/10.1016/j.ejmech.2020.112238

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. ELISA Kits are guaranteed for 6 months from date of receipt.

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Bioinformatics

Gene Symbol TLR7