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-147080
    Avacincaptad pegol sodium
    		Inhibitor 98.53%
    Avacincaptad pegol (ARC1905) sodium is a 40KDa PEG-conjugated aptamer. Avacincaptad pegol sodium targets complement factor 5 (C5), inhibits the cleavage of C5 into C5a and C5b, limits inflammatory stimulation and complement membrane attack complex (MAC), and is used to study age-related macular degeneration (AMD). Avacincaptad pegol sodium limits irregular cell apoptosis by targeting downstream factors in the complement cascade while preserving the early steps of the complement system. Avacincaptad pegol sodium treats Geographic atrophy (GA) mice.
    Avacincaptad pegol sodium
  • HY-148141
    JPE-1375
    		Antagonist 99.94%
    JPE-1375 is a complement C5a receptor 1 (C5aR1) antagonist. JPE-1375 effectively inhibits polymorphonuclear leukocyte mobilization (EC50=6.9 µM) and reduces TNF levels (EC50=4.5 µM) in mice. JPE-1375 can be used in studies of autoimmune and inflammatory diseases.
    JPE-1375
  • HY-P99386
    Vesencumab
    		Inhibitor ≥99.0%
    Vesencumab (MNRP-1685A) is IG1 antibody against neuropilin-1 (NRP-1). Vesencumab binds to NRP-1 and prevents the subsequent coupling of NRP-1 to VEGFR-2. Vesencumab has anti-angiogenic and anti-neoplastic activities. Vesencumab can be used in the research of metastatic solid tumors, including ovarian cancer.
    Vesencumab
  • HY-P99050
    Sutimlimab
    		Inhibitor 98.81%
    Sutimlimab, a first-in-class complement protein component 1, s subcomponent (C1s) inhibitor, can be used for the research of cold agglutinin disease. C1s is a serine protease which cleaves C4 and C2 to form the C3 convertase.
    Sutimlimab
  • HY-P3252A
    Pegcetacoplan acetate
    		Inhibitor 99.74%
    Pegcetacoplan acetate is a pegylated complement C3 inhibitor peptide. Pegcetacoplan acetate acts by binding with complement component 3 (C3) and its activation fragment C3b. Pegcetacoplan acetate can be used for the research of complement-mediated diseases, including age-related macular degeneration, C3 glomerulopathy, Geographic atrophy (GA) and autoimmune haemolytic anaemia.
    Pegcetacoplan acetate
  • HY-112151A
    EG01377 dihydrochloride
    		Inhibitor 98.98%
    EG01377 dihydrochloride is a potent, bioavailable and selective inhibitor of neuropilin-1 (NRP1), with a Kd of 1.32 μM, and IC50s of 609 nM for both NRP1-a1 and NRP1-b1. EG01377 dihydrochloride has antiangiogenic, antimigratory, and antitumor effects.
    EG01377 dihydrochloride
  • HY-127105A
    Iptacopan hydrochloride
    		Inhibitor 99.88%
    LNP023 hydrochloride is an orally bioavailable, highly potent and highly selective factor B inhibitor. LNP023 shows direct, reversible, and high-affinity binding to human factor B with a KD of 7.9 nM. LNP023 inhibits factor B with an IC50 value of 10 nM.
    Iptacopan hydrochloride
  • HY-116282A
    Dextran sulfate sodium salt (MW 4500-5500)
    		Inhibitor
    Dextran sulfate sodium salt (DSS) (MW 4500-5500) is a polymer of dehydrated glucose with a molecular weight of approximately 4500-5500. Dextran sulfate sodium salt with different molecular weights exhibits different biological activities. Dextran sulfate sodium salt (MW 4500-5500) is an inhibitor of complement and coagulation pathways, and belongs to the glycosaminoglycans (GAG) family. Dextran sulfate sodium salt (MW 4500-5500) acts as an anticoagulant, antiviral, and anti-lipemic agent. Dextran sulfate sodium salt (MW 4500-5500) stops HIV-1 virus adsorption to host cells. Dextran sulfate sodium salt (MW 4500-5500) prevents NK cell-mediated cytotoxicity. Dextran sulfate sodium salt (MW 4500-5500) inhibits instant blood-mediated inflammatory reaction (IBMIR).
    Dextran sulfate sodium salt (MW 4500-5500)
  • HY-14648C
    Dexamethasone (Water Soluble)
    		Inhibitor ≥98.0%
    Dexamethasone (Hexadecadrol) Water Soluble is a water-soluble form of Dexamethasone (HY-14648). Dexamethasone is a glucocorticoid receptor agonist, apoptosis inducer, and a common disease inducer in experimental animals. It can be used to construct models of muscle atrophy, hypertension, and depression. Dexamethasone can inhibit the production of inflammatory miRNA-155 exosomes in macrophages and significantly reduce the expression of inflammatory factors in neutrophils and monocytes. Dexamethasone also has the potential to be used in COVID-19 research.
    Dexamethasone (Water Soluble)
  • HY-P99365
    Ravulizumab
    		Inhibitor
    Ravulizumab (ALXN1210) is a humanized monoclonal antibody that specifically binds with high affinity to the human complement protein C5. Ravulizumab can be used for the research of paroxysmal nocturnal hemoglobinuria, atypical hemolytic uremic syndrome, and myasthenia gravis.
    Ravulizumab
  • HY-N9481
    Lipoteichoic acid
    		Activator
    Lipoteichoic acid is an orally effect anti-inflammatory and antitumor agent. Lipoteichoic acid is a crucial immune molecule in Gram-positive bacteria that activates the complement system by inducing C3 and inhibiting CD55. Lipoteichoic acid regulates macrophage autophagy through the PI3K/Akt/mTOR pathway. Lipoteichoic acid induces lung damage in mice. Lipoteichoic acid inhibits the production of melanin.
    Lipoteichoic acid
  • HY-P3502
    Zilucoplan
    		Inhibitor
    Zilucoplan (RA101495), a 15-amino acid macrocyclic peptide, is a potent complement component 5 (C5) inhibitor. Zilucoplan can be used in research of immune-mediated necrotising myopathy (IMNM).
    Zilucoplan
  • HY-P1345A
    TLQP-21 TFA
    		Agonist 99.90%
    TLQP-21 TFA, a VGF-derived peptide endowed of endocrine and extraendocrine properties, is a potent G-protein-coupled receptor complement-3a receptor1 (C3aR1) agonist (EC50: mouse TLQP-21=10.3 μM; human TLQP-21=68.8μM). TLQP-21 TFA activates C3aR1 to induce an increase of intracellular Ca2+. TLQP-21 TFA is used for the research in regulation of nociception and other relevant physiologic functions.
    TLQP-21 TFA
  • HY-15701B
    ADH-503
    		Agonist 98.04%
    ADH-503 ((Z)-Leukadherin-1 choline) is an orally active and allosteric CD11b agonist. ADH-503 leads to the repolarization of tumor-associated macrophages, reduction in the number of tumor-infiltrating immunosuppressive myeloid cells, and enhances dendritic cell responses.
    ADH-503
  • HY-P3448
    Certepetide
    		Activator 99.40%
    Certepetide (CEND-1) is a bifunctional cyclic peptide (a.k.a. iRGD). Certepetide is a tumor-penetrating enhancer via RGD motif interaction with alphav-integrins and via activating NRP-1, and transforms the solid tumor microenvironment into a temporary agent conduit. Certepetide accumulates in tumors, and is used in the research of pancreatic cancer and other solid tumors.
    Certepetide
  • HY-139588
    Vemircopan
    		Inhibitor 98.61%
    Vemircopan (ALXN2050) is an orally active complement factor D (FD) inhibitor. Vemircopan can be used in the research of diseases such as myasthenia gravis, lupus nephritis, IgA nephropathy, and paroxysmal nocturnal hemoglobinuria.
    Vemircopan
  • HY-P3204
    POT-4
    		Inhibitor 99.64%
    POT-4 (AL-78898A), a Compstatin derivative, is a potent inhibitor of complement factor C3 activation. POT-4 can be used for age-related macular degeneration research
    POT-4
  • HY-50875
    BCX 1470 methanesulfonate
    		Inhibitor 99.87%
    BCX 1470 methanesulfonate inhibits the esterolytic activity of factor D (IC50=96 nM) and C1s (IC50=1.6 nM), 3.4- and 200-fold better, respectively, than that of trypsin.
    BCX 1470 methanesulfonate
  • HY-128342
    Complement C5-IN-1
    		Inhibitor 99.14%
    Complement C5-IN-1 (Compound 7) is a small-molecule inhibitor of complement component 5 protein (C5). Complement C5-IN-1 interacts with C5 to prevent its cleavage by the C5 convertase and blocks zymosan-induced the membrane-attack complex (MAC) deposition in 50% human whole blood with an IC50 of 0.77 µM.
    Complement C5-IN-1
  • HY-16992A
    W-54011
    		Antagonist ≥98.0%
    W-54011 is a potent and orally active non-peptide C5a receptor antagonist. W-54011 inhibits the binding of 125I-labeled C5a to human neutrophils with a Ki value of 2.2 nM. W-54011 also inhibits C5a-induced intracellular Ca2+ mobilization, chemotaxis, and generation of ROS in human neutrophils with IC50s of 3.1 nM, 2.7 nM, and 1.6 nM, respectively.
    W-54011
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity