2. Immunology/Inflammation
  3. Complement System

Complement System

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.

Complement System Related Products (87):

Cat. No. Product Name Effect Purity
  • HY-P1717B
    AMY-101 acetate Inhibitor 99.93%
    AMY-101 acetate (Cp40 acetate), a peptidic inhibitor of the central complement component C3 (KD = 0.5 nM), inhibits naturally occurring periodontitis in non-human primates (NHPs). AMY-101 acetate (Cp40 acetate) exhibits a favorable anti-inflammatory activity in models with COVID-19 severe pneumonia with systemic hyper inflammation[1][2].
  • HY-14648
    Dexamethasone Inhibitor 99.86%
    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.
  • HY-117930
    Danicopan Inhibitor
    Danicopan (ACH-4471), a selective and orally active small-molecule factor D inhibitor, shows high binding affinity to human Factor D with Kd value of 0.54 nM. Danicopan (ACH-4471) inhibits alternative pathway of complement (APC) activity, has potential to block the alternative pathway of complement in paroxysmal nocturnal hemoglobinuria (PNH) and atypical hemolytic uremic syndrome (aHUS)[1].
  • HY-127105
    Iptacopan Inhibitor 99.96%
    Iptacopan (LNP023) is a first-in-class, orally bioavailable, highly potent and highly selective factor B inhibitor with an IC50 value of 10 nM. Iptacopan shows direct, reversible, and high-affinity binding to human factor B with a KD of 7.9 nM. Iptacopan targets the underlying cause of complement 3 glomerulopathy (C3G)[1][2].
  • HY-B0579
    Cyclosporin A Inhibitor
    Cyclosporin A (Cyclosporine A) is an immunosuppressant which binds to the cyclophilin and inhibits phosphatase activity of calcineurin with an IC50 of 5 nM[3]. Cyclosporin A also inhibits CD11a/CD18 adhesion[8].
  • HY-149278
    Complement C1s-IN-1 Inhibitor
    Complement C1s-IN-1 is a potent, selective, orally active and cross the blood-brain barrier C1s inhibitor with an IC50 value of 36 nM[1].
  • HY-P99767
    Olendalizumab Inhibitor
    Olendalizumab (ALXN1007) is a mouse-derived and humanized IgG2-G4-κ antibody, targeting to Complement protein C5a (Ki=60 pM). Olendalizumab targets the complement inflammatory pathway. Moreover, Olendalizumab can be used for research of complement mediated disorder caused by corona virus[1][2].
  • HY-P99786
    Pozelimab Inhibitor
    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[1].
  • HY-147077
    Cemdisiran, terminal sugar modification- Inhibitor
    Cemdisiran, terminal sugar modification- is an investigational N-acetylgalactosamine-conjugated RNAi agent. Cemdisiran, a siRNA-targeting C5 mRNA, suppresses liver production of complement component C5[1].
  • HY-15701B
    ADH-503 Agonist
    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[1].
  • HY-148370
    IONIS-FB-LRx Inhibitor
    IONIS-FB-LRx is a specific antisense oligonucleotide (ASO) targeting complement factor B (CFB). IONIS-FB-LRx effectively reduces circulating levels of CFB. IONIS-FB-LRx can be used for geographic atrophy (GA) research[1][2].
  • 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[1][2]
  • HY-153098
    ARC186 Inhibitor
    ARC186, a aptamer, is highly potent complement inhibitors that function by blocking the convertase-catalyzed activation of C5.
  • HY-138281
    Complement factor D-IN-2 Inhibitor 99.33%
    Complement factor D-IN-2 is an inhibitor of complement factor D extracted from patent WO2015130838A1, compound 190. Complement factor D-IN-2 targets factor D and inhibits the complement cascade at an early and essential point in the alternative complement pathway. Complement factor D-IN-2 can be used for the research of autoimmune diseases[1].
  • HY-14648S3
    Dexamethasone-4,6α,21,21-d4 Inhibitor
    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.
  • HY-N7400
    Phaseoloidin 99.96%
    Phaseoloidin is a homogentisic acid glucoside from Nicotiana attenuata trichomes and contributes to the plant's resistance against lepidopteran herbivores. Phaseoloidin reduces larval growth of the specialist larvae Manduca sexta and the generalist larvae Spodoptera littoralis[1]. Phaseoloidin has anti-complement activitie[2].
  • HY-P9914
    Eculizumab Inhibitor
    Eculizumab (Anti-Human C5, Humanized Antibody) is a long-acting humanized monoclonal antibody targeted against complement C5. Eculizumab inhibits the cleavage of C5 into C5a and C5b and hence inhibits deployment of the terminal complement system including the formation of membrane attack complex (MAC). Eculizumab has the potential for haemolysis research[1].
  • 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[1].
  • 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[1].
  • HY-P1505A
    C3a (70-77) (TFA)
    C3a (70-77) TFA (Complement 3a (70-77) TFA) is an octapeptide corresponding to the COOH terminus of C3a, exhibits the specificity and 1 to 2% biologic activities of C3a[1][2].