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-W049802
    N-((Allyloxy)carbonyl)-N-methyl-L-alanine
    		Inhibitor
    N-((Allyloxy)carbonyl)-N-methyl-L-alanine is a Alanine derivative. N-((Allyloxy)carbonyl)-N-methyl-L-alanine can be used for the synthesis of inhibitors of complement factor D. Complement factor D inhibitors can be used in the research of immune system related disease.
    N-((Allyloxy)carbonyl)-N-methyl-L-alanine
  • 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.
    Olendalizumab
  • HY-147605
    Factor B-IN-3
    		Inhibitor
    Factor B-IN-3 (Example 3 target compound) is a potent complement factor B inhibitor. Factor B-IN-3 can be used for the research of diseases related to inflammation and immunity.
    Factor B-IN-3
  • HY-16384
    L-156602
    		Antagonist
    L-156602 is a C5a receptor antagonist. L-156602 inhibits inflammation, and the migration of monocytes and neutrophils to the infiltrating site in mouse inflammatory models. L-156602 suppresses the efferent phase of delayed-type hypersensitivity (DTH).
    L-156602
  • HY-147604
    Factor B-IN-2
    		Inhibitor
    Factor B-IN-2 (Example 1 target compound) is a potent complement factor B inhibitor, with an IC50 of 1.5 μM. Factor B-IN-2 can be used for the research of diseases related to inflammation and immunity.
    Factor B-IN-2
  • HY-163062
    Tubulin/NRP1-IN-1
    		Inhibitor
    Tubulin/NRP1-IN-1 (compound TN-2) is a dual inhibitor of Tubulin and NRP1 with IC50s of 0.71 and 0.85 μM, respectively. Tubulin/NRP1-IN-1 significantly inhibits the viability of prostate tumor cell lines and induces apoptosis.
    Tubulin/NRP1-IN-1
  • HY-163379
    C5aR1 antagonist 2
    		Antagonist
    C5aR1 antagonist 2 (Compound 6a) is an orally active C5a receptor 1 (C5aR1) antagonist that shows efficacy in inhibiting the C5a-induced neutrophil count increase. C5aR1 antagonist 2 is potent in the DISCO and migration assays, with IC50 values of 21 and 3 nM, respectively. C5aR1 antagonist 2 can be used for the research of acute and chronic inflammatory diseases.
    C5aR1 antagonist 2
  • HY-N7166
    3-O-(2'E,4'Z-Decadienoyl)ingenol
    		Inhibitor
    3-O-(2'E,4'Z-Decadienoyl)ingenol is a natural diterpene that exhibits significant anticomplement activity with an IC50 of 89.5 μM.
    3-O-(2'E,4'Z-Decadienoyl)ingenol
  • HY-17627R
    Avacopan (Standard)
    		Inhibitor
    Avacopan (Standard) is the analytical standard of Avacopan. This product is intended for research and analytical applications. Avacopan (CCX168) is a potent, selective and orally available complement 5a receptor (C5aR) inhibitor with an IC50 of 0.1 nM.
    Avacopan (Standard)
  • HY-P10639A
    C5aR2 agonist P32 acetate
    		Agonist
    C5aR2 agonist P32 (Ac-RHYPYWR-OH) acetate is a C5aR2-selective agonist. C5aR2 agonist P32 acetate has been shown to elicit multiple immunomodulatory activities, both by down-regulating the C5aR1-mediated cell signalling, and acting in a C5aR1-independent fashion, in vitro and in vivo.
    C5aR2 agonist P32 acetate
  • HY-P3502B
    Zilucoplan (PEG2)
    		Inhibitor
    Zilucoplan (PEG2) is a Zilucoplan (HY-P3502) derivative, where the linker section replaces PEG24 by PEG2. Zilucoplan is a potent complement component 5 (C5) inhibitor.
    Zilucoplan (PEG2)
  • HY-W130878
    4-Octylphenol
    		Activator
    4-Octylphenol is a hormone disruptor that has gender-specific effects on male reproductive cells, significantly reducing the mitotic index and the number of spermatogonia. 4-Octylphenol can cause inflammatory damage to fish gills by activating the complement system through the C3a/C3aR axis and the C5a/C5aR1 axis, this leads to complement activation and causes immune suppression due to the imbalance between Th1/Th2 cells and regulatory T cells (Treg)/Th17 cells, as well as inflammatory damage via the Toll-like receptor 7 (Toll-like Receptor (TLR))/IκBα/NF-κB pathway.
    4-Octylphenol
  • HY-147607
    Factor B-IN-5
    		Inhibitor
    Factor B-IN-5 (Example 5 target compound) is a potent complement factor B inhibitor, with an IC50 of 1.2 μM. Factor B-IN-5 can be used for the research of diseases related to inflammation and immunity.
    Factor B-IN-5
  • HY-B0579R
    Cyclosporin A (Standard)
    		Inhibitor
    Cyclosporin A (Standard) is the analytical standard of Cyclosporin A. This product is intended for research and analytical applications. Cyclosporin A (Cyclosporine A) is an immunosuppressant which binds to the cyclophilin and inhibits phosphatase activity of protein phosphatase 2B (PP2B/calcineurin) with an IC50 of 5 nM. Cyclosporin A also inhibits CD11a/CD18 adhesion.
    Cyclosporin A (Standard)
  • HY-160901
    CP-289,503
    		Inhibitor
    CP-289,503 is an inhibitor of the complement C5a receptor with an IC50 of 1 μM. C5a acts as an activator of leukocytes and phagocytes during complement system activation. The C5a receptor can bind to C5a, which can stimulate the upregulation of cell surface integrins and degranulation of inflammatory cells, leading to endothelial cell damage. C5a receptor inhibitors can block C5a signaling and inhibit a variety of inflammatory diseases.
    CP-289,503
  • HY-NP0194A
    C1q Protein (Mouse)
    C1q Protein (Mouse) is the subunit of the complement system. C1q Protein (Mouse) recognizes a variety of ligands, and is involved in maintaining immune system balance, promoting tissue repair, and defending against pathogens.
    C1q Protein (Mouse)
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity