2. Signaling Pathways
  3. Immunology/Inflammation
  4. Complement System

Complement System

Complement System

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The complement system, composed of more than 30 serum and cell surface components, is collaborating in recognition and elimination of pathogens as a part of both the innate and acquired immune systems. Once the complement system is activated, a chain of reactions involving proteolysis and assembly occurs, resulting in cleavage of the third complement component (C3). The cascade up to C3 cleavage is called the activation pathway. There are three activation pathways: the classical, lectin, and alternative pathways.

The complement cascade is a dual-edged sword, causing protection against bacterial and viral invasion by promoting phagocytosis and inflammation. Pathologically, complement can cause substantial damage to blood vessels (vasculitis), kidney basement membrane and attached endothelial and epithelial cells (nephritis), joint synovium (arthritis), and erythrocytes (hemolysis) if it is not adequately controlled.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-153785
    NH2-C6-ARC186 sodium
    		Inhibitor
    NH2-C6-ARC186 sodium is a modified ARC186 (HY-153098) with NH2-C6 that can be coupled to other peptides or molecules. ARC186 is a aptamer and a highly potent complement inhibitor that function by blocking the convertase-catalyzed activation of C5.
    NH2-C6-ARC186 sodium
  • HY-145720A
    Cemdisiran sodium
    Cemdisiran sodium is an N-acetylgalactosamine (GalNAc) conjugated siRNA for the research of complement-mediated diseases by suppressing liver production of complement 5 (C5) protein.
    Cemdisiran sodium
  • HY-14648S
    Dexamethasone-d5
    		Inhibitor 99.86%
    Dexamethasone-d5 is the deuterium labeled Dexamethasone. Dexamethasone (Hexadecadrol) is a glucocorticoid receptor agonist. Dexamethasone also significantly decreases CD11b, CD18, and CD62L expression on neutrophils, and CD11b and CD18 expression on monocytes. Dexamethasone is highly effective in the control of COVID-19 infection. Dexamethasone inhibits production of exosomes containing inflammatory microRNA-155 in lipopolysaccharide-induced macrophage inflammatory responses[1][2].
    Dexamethasone-d<sub>5</sub>
  • HY-153098
    ARC186
    		Inhibitor
    ARC186 (sodium) is an unconjugated 40KDa PEG aptamer with a sequence identical to HY-147080 Avacincaptad pegol (ARC1905) sodium. ARC1905 is highly potent complement inhibitors that function by blocking the convertase-catalyzed activation of C5.
    ARC186
  • HY-Y0641
    3-Phenoxybenzaldehyde
    		Inhibitor 99.74%
    3-Phenoxybenzaldehyde has weak complement classical pathway inhibition and hemolytic activity.
    3-Phenoxybenzaldehyde
  • HY-P990025
    Empasiprubart
    Empasiprubar (ARGX-117) is a humanized inhibitory monoclonal antibody targeting complement C2. Empasiprubar binds to the Sushi-2 domain of C2, preventing the formation of C3 pre convertase and inhibiting the activation of classical and lectin pathways upstream of C3 activation. Empasiprubar can prevent complement mediated autoimmune hemolytic anemia and antibody mediated organ transplant rejection. Empasiprubar can prevent neuroglial lymphoconjunctival injury in GM1 antibody mediated mouse models.
    Empasiprubart
  • HY-14648R
    Dexamethasone (Standard)
    		Inhibitor
    Dexamethasone (Standard) is the analytical standard of Dexamethasone. This product is intended for research and analytical applications. Dexamethasone (Hexadecadrol) is a glucocorticoid receptor agonist. Dexamethasone also significantly decreases CD11b, CD18, and CD62L expression on neutrophils, and CD11b and CD18 expression on monocytes. Dexamethasone is highly effective in the control of COVID-19 infection. Dexamethasone inhibits production of exosomes containing inflammatory microRNA-155 in lipopolysaccharide-induced macrophage inflammatory responses.
    Dexamethasone (Standard)
  • HY-14648AR
    Dexamethasone acetate (Standard)
    		Inhibitor 98.93%
    Dexamethasone acetate (Standard) is the analytical standard of Dexamethasone acetate. This product is intended for research and analytical applications. Dexamethasone acetate (Dexamethasone 21-acetate) is a glucocorticoid receptor agonist. Dexamethasone also significantly decreases CD11b, CD18, and CD62L expression on neutrophils, and CD11b and CD18 expression on monocytes. Dexamethasone is highly effective in the control of COVID-19 infection. Dexamethasone inhibits production of exosomes containing inflammatory microRNA-155 in lipopolysaccharide-induced macrophage inflammatory responses.
    Dexamethasone acetate (Standard)
  • HY-P5506
    C5a Receptor agonist, W5Cha
    		Agonist 99.50%
    C5a Receptor agonist, W5Cha (Peptide 1) is a selective complement C5a receptor (C5aR) agonist (EC50=0.2 μM), a hexapeptide derived from the C-terminus of C5a with specific amino acid modifications. C5a Receptor agonist, W5Cha is able to interact with the Arg-206 site of the C5a receptor through its C-terminal arginine, thereby activating the receptor.
    C5a Receptor agonist, W5Cha
  • HY-P99786
    Pozelimab
    		Inhibitor 99.42%
    Pozelimab (REGN3918) is a fully human IgG4 anti-C5 monoclonal antibody. Pozelimab binds to C5 and C5 variants with high affinity and blocks complement-mediated hemolysis. Pozelimab can be used for the research of complement-mediated diseases.
    Pozelimab
  • HY-15701A
    (Z)-Leukadherin-1
    		Agonist ≥98.0%
    (Z)-Leukadherin-1 (ADH-503 free base) is an orally active and allosteric CD11b agonist. (Z)-Leukadherin-1 leads to the repolarization of tumor-associated macrophages, reduction in the number of tumor-infiltrating immunosuppressive myeloid cells, and enhances dendritic cell responses.
    (Z)-Leukadherin-1
  • HY-14648S3
    Dexamethasone-4,6α,21,21-d4
    		Inhibitor ≥99.0%
    Dexamethasone-4,6α,21,21-d4 is the deuterium labeled Dexamethasone-4,6α,21,21. Dexamethasone (Hexadecadrol) is a glucocorticoid receptor agonist. Dexamethasone also significantly decreases CD11b, CD18, and CD62L expression on neutrophils, and CD11b and CD18 expression on monocytes. Dexamethasone is highly effective in the control of COVID-19 infection. Dexamethasone inhibits production of exosomes containing inflammatory microRNA-155 in lipopolysaccharide-induced macrophage inflammatory responses.
    Dexamethasone-4,6α,21,21-d<sub>4</sub>
  • HY-122700
    Factor D inhibitor 6
    		Inhibitor 99.45%
    Factor D inhibitor 6 is a potent, highly selective and orally active factor D (FD) inhibitor with an IC50 of 30 nM and a Kd of 6 nM. Factor D inhibitor 6 is inactive against factor B, lassical and lectin complement-pathway activation, and a broad assay panel of receptors, ion channels, kinases and proteases.
    Factor D inhibitor 6
  • HY-163684
    Zoracopan
    		Inhibitor 99.85%
    Zoracopan is a selective complement factor D (CFD) inhibitor. When administered systemically (orally or intravenously), Zoracopan accumulates and is sustained-released in ocular tissues, primarily in the choroid-retinal pigment epithelium (C-RPE) and/or iridociliary body (I-CB).
    Zoracopan
  • HY-153098A
    ARC186 sodium
    		Inhibitor
    ARC186 (sodium) is an unconjugated 40KDa PEG aptamer with a sequence identical to HY-147080 Avacincaptad pegol (ARC1905) sodium. ARC1905 is highly potent complement inhibitors that function by blocking the convertase-catalyzed activation of C5.
    ARC186 sodium
  • HY-102034
    Complement factor D-IN-1
    		98.85%
    Complement factor D-IN-1 is a potent and selective small-molecule reversible factor d inhibitor, with IC50s of 0.006 and 0.05 μM in FD Thioesterolytic Fluorescent Assay and a MAC Deposition Assay, respectively.
    Complement factor D-IN-1
  • HY-P1036A
    Compstatin TFA
    		Inhibitor 99.02%
    Compstatin TFA, a 13-residue cyclic peptide, is a potent inhibitor of the complement system C3 with species specificity. Compstatin TFA binds to baboon C3 and is resistant to proteolytic cleavage in baboon blood (similar to humans). Compstatin TFA inhibits only the activation of primates’ complement system. Compstatin TFA exhibits IC50 values of 63 μM and 12 μM for classical and alterative complement pathway, respectively.
    Compstatin TFA
  • HY-P1717
    AMY-101
    		Inhibitor
    AMY-101 (Cp40), a peptidic inhibitor of the central complement component C3 (KD = 0.5 nM), inhibits naturally occurring periodontitis in non-human primates (NHPs). AMY-101 (Cp40) exhibits a favorable anti-inflammatory activity in models with COVID-19 severe pneumonia with systemic hyper inflammation.
    AMY-101
  • HY-112151
    EG01377
    		Inhibitor
    EG01377 is a potent, bioavailable and selective inhibitor of neuropilin-1 (NRP1), with a Kd of 1.32 μM, and IC50s of both 609 nM for NRP1-a1 and NRP1-b1. EG01377 has antiangiogenic, antimigratory, and antitumor effects.
    EG01377
  • HY-148457
    Avacincaptad pegol
    		Inhibitor
    Avacincaptad pegol, which is a pegylated aptamer, has garnered significant attention as a C5 complement inhibitor that may reduce inflammation-related retinal pigment epithelium (RPE) damage. Avacincaptad pegol caqn be used for the research of stargardt macular dystrophy (STGD1) and geographic atrophy (GA).
    Avacincaptad pegol
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity