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-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
    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-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-147080
    Avacincaptad pegol sodium
    		Inhibitor 98.53%
    Avacincaptad pegol (ARC1905) is an anti-C5 RNA aptamer that inhibits the cleavage of complement factor 5 (C5) into C5a and C5b. Avacincaptad pegol is being used for the study of age-related macular degeneration (AMD).
    Avacincaptad pegol sodium
  • HY-P99050
    Sutimlimab
    		Inhibitor
    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-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-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
  • 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-P3204
    POT-4
    		Inhibitor 99.60%
    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-128132
    C3a receptor agonist 1
    		Agonist 98.04%
    C3a receptor agonist 1 (compound benzeneacetamide) is a potent C3a receptor agonist. C3a receptor agonist 1 has the potential for the research of acute inflammation.
    C3a receptor agonist 1
  • HY-139588
    Vemircopan
    		Inhibitor 98.56%
    Vemircopan (ALXN2050) is an orally active complement factor D inhibitor.
    Vemircopan
  • HY-128570
    FD-IN-1
    		Inhibitor 99.24%
    FD-IN-1 (Compound 12) is an orally bioavailable and selective factor D (FD) inhibitor with an IC50 of 12 nM. Complement FD, a highly specific S1 serine protease, plays a central role in the alternative complement pathway of the innate immune system. FD-IN-1 also inhibits factor XIa (FXIa) and Tryptase β2 with IC50s of 7.7 and 6.5 µM, respectively.
    FD-IN-1
  • 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-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-145720
    Cemdisiran
    		Inhibitor
    Cemdisiran is an N-acetylgalactosamine (GalNAc) conjugated siRNA for the research of complement-mediated diseases by suppressing liver production of complement 5 (C5) protein.
    Cemdisiran
  • HY-50875
    BCX 1470 methanesulfonate
    		Inhibitor 99.74%
    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-P1663A
    ATWLPPR Peptide TFA
    		Inhibitor 99.56%
    ATWLPPR Peptide TFA, a heptapeptide, acts as a selective neuropilin-1 inhibitor, inhibits VEGF165 binding to NRP-1, used in the research of angiogenesis. ATWLPPR Peptide TFA has potential in reducing the early retinal damage caused by diabetes.
    ATWLPPR Peptide TFA
  • 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-110060
    NDT 9513727
    		Antagonist 99.10%
    NDT 9513727 is a potent, selective, orally active and competitive inverse agonist of the human C5aR (C5a receptor), with an IC50 of 11.6 nM. NDT 9513727 can be used for the research of human inflammatory diseases.
    NDT 9513727
  • HY-P99322
    Tesidolumab
    		Inhibitor
    Tesidolumab (LFG316) is a fully-human IgG1/λ anti-C5 monoclonal antibody of 143 kDa (without glycosylation). Tesidolumab (LFG316) blocks cleavage of C5 and prevents subsequent formation of the membrane attack complex.
    Tesidolumab
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity