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-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-128132
    C3a receptor agonist 1
    		Agonist 98.16%
    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-16992A
    W-54011
    		Antagonist 99.57%
    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%
    Compound C5-IN-1 (Compound 7) is a selective allosteric inhibitor of complement component protein C5. Compound C5-IN-1 prevents C5 from being cleaved by C5 convertase, inhibits the cleavage of C5 into C5a and C5b, and thus blocks the formation of membrane attack complex (MAC). Compound C5-IN-1 has an IC50 of 0.77 μM and 5 nM in 50% human whole blood and 2% human serum to block MAC deposition induced by zymosan, respectively. Compound C5-IN-1 can be used to study diseases related to complement overactivation, such as paroxysmal nocturnal hemoglobinuria (PNH) and atypical hemolytic uremic syndrome (aHUS).
    Complement C5-IN-1
  • HY-N7400
    Phaseoloidin
    		99.85%
    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. Phaseoloidin has anti-complement activitie.
    Phaseoloidin
  • 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-133034
    NRP1 antagonist 1
    		Antagonist 99.71%
    NRP1 antagonist 1 (compound 12a) is a potent NRP1 antagonist with an IC50 of 19.1 μM. NRP1 antagonist 1 has the potential for cancer research.
    NRP1 antagonist 1
  • HY-P99450
    Avdoralimab
    		Inhibitor 99.25%
    Avdoralimab (IPH 5401) is a fully human IgGκ monoclonal antibody that targets the complement C5a receptor 1 (C5aR1) that prevents its binding to C5a. Avdoralimab can be used for complement-driven inflammatory diseases and solid tumours research.
    Avdoralimab
  • 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-145237
    BM213
    		Agonist 99.81%
    BM213, a potent and selective agonist for C5aR1, shows antitumor activity in a mouse model of mammary carcinoma.
    BM213
  • HY-P1663A
    ATWLPPR Peptide TFA
    		Inhibitor 99.81%
    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-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
  • HY-NP137
    NP-PE (Phycoerythrin)
    NP-PE (Phycoerythrin) is an immune complex. The formation and transport of NP-PE (Phycoerythrin) depends on the complement system, specifically through the complement receptors CR1 and CR2. These receptors are expressed on the surface of B cells and help B cells capture and transport immune complexes. NP-PE (Phycoerythrin) can be used to study the mechanisms by which B cells capture and transport immune complexes in lymph nodes.
    NP-PE (Phycoerythrin)
  • HY-B0579S
    Cyclosporin A-d4
    		99.59%
    Cyclosporin A-d4 is the deuterium labeled Cyclosporin A. Cyclosporin A (Cyclosporine A) is an immunosuppressant which binds to the cyclophilin and inhibits phosphatase activity of calcineurin with an IC50 of 5 nM. Cyclosporin A also inhibits CD11a/CD18 ad
    Cyclosporin A-d<sub>4</sub>
  • HY-110060
    NDT 9513727
    		Antagonist 99.35%
    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-148370A
    IONIS-FB-LRx sodium
    		Inhibitor
    IONIS-FB-LRx sodium is a specific antisense oligonucleotide (ASO) targeting complement factor B (CFB). IONIS-FB-LRx sodium effectively reduces circulating levels of CFB, and can be used for geographic atrophy (GA) research.
    IONIS-FB-LRx sodium
  • HY-P99520
    Vilobelimab
    		Inhibitor 99.95%
    Vilobelimab (CaCP-29, IFX-1) is a monoclonal anti-C5a antibody to the allergen C5a, a pro-inflammatory complement division product that plays a central role in mediating organ dysfunction. Vilobelimab acts as a C5a inhibitor, inhibiting neutrophil activation, chemotaxis, and reducing inflammatory signalling, and may be used in studies related to sepsis, COVID-19, etc.
    Vilobelimab
  • 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-P99638
    Gefurulimab
    		Inhibitor
    Gefurulimab (ALXN-1720) is a high-affinity antibody inhibitor targeting complement protein C5, which can specifically bind to C5 and inhibit its cleavage into C5a and C5b. Gefurulimab can block the activation of the terminal complement pathway and reduce inflammatory damage. Gefurulimab can effectively reduce the formation of membrane attack complex (MAC) and has good pharmacokinetic properties. Gefurulimab can be used to study kidney and autoimmune diseases related to abnormal activation of the complement system, such as IgA nephropathy, lupus nephritis, and myasthenia gravis.
    Gefurulimab
  • HY-117992
    BR103
    		99.75%
    BR103 is a C3aR-specific small molecule ligand. BR103 can be used to measure ligand affinity for a G protein-coupled receptor for saturation and competitive binding.
    BR103
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