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-P1036A
    Compstatin TFA
    		Inhibitor 99.02%
    Compstatin TFA, a 13-residue cyclic peptide, is a potent inhibitor of the complement system C3 with species specificity. Compstatin TFA binds to baboon C3 and is resistant to proteolytic cleavage in baboon blood (similar to humans). Compstatin TFA inhibits only the activation of primates’ complement system. Compstatin TFA exhibits IC50 values of 63 μM and 12 μM for classical and alterative complement pathway, respectively.
    Compstatin TFA
  • HY-P1717
    AMY-101
    		Inhibitor
    AMY-101 (Cp40), a peptidic inhibitor of the central complement component C3 (KD = 0.5 nM), inhibits naturally occurring periodontitis in non-human primates (NHPs). AMY-101 (Cp40) exhibits a favorable anti-inflammatory activity in models with COVID-19 severe pneumonia with systemic hyper inflammation.
    AMY-101
  • HY-112151
    EG01377
    		Inhibitor
    EG01377 is a potent, bioavailable and selective inhibitor of neuropilin-1 (NRP1), with a Kd of 1.32 μM, and IC50s of both 609 nM for NRP1-a1 and NRP1-b1. EG01377 has antiangiogenic, antimigratory, and antitumor effects.
    EG01377
  • HY-148457
    Avacincaptad pegol
    		Inhibitor
    Avacincaptad pegol, which is a pegylated aptamer, has garnered significant attention as a C5 complement inhibitor that may reduce inflammation-related retinal pigment epithelium (RPE) damage. Avacincaptad pegol caqn be used for the research of stargardt macular dystrophy (STGD1) and geographic atrophy (GA).
    Avacincaptad pegol
  • HY-P1398
    Compstatin control peptide
    		Control 99.97%
    Compstatin control peptide is a negative control of Compstatin (HY-P1036). Compstatin is a potent complement system C3 inhibitor.
    Compstatin control peptide
  • HY-112199
    CP-447697
    		Antagonist 99.70%
    CP-447697 is a lipophilic C5a receptor antagonist with an IC50 value of 31 nM. CP-447697 can be used for the research of inflammation.
    CP-447697
  • HY-136556
    Factor B-IN-1
    		Inhibitor
    Factor B-IN-1 is a Factor B inhibitor extracted from patent WO2013164802A1, Example 24.
    Factor B-IN-1
  • HY-P1505
    C3a (70-77)
    C3a (70-77) is an octapeptide corresponding to the COOH terminus of C3a, exhibits the specificity and 1 to 2% biologic activities of C3a.
    C3a (70-77)
  • HY-B0579S2
    Cyclosporin A acetate-d4
    		Inhibitor 99.90%
    Cyclosporin A acetate-d4 (Cyclosporine A acetate-d4; Ciclosporin A acetate-d4) is a deuterium labeled Cyclosporin A (HY-B0579). 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 acetate-d<sub>4</sub>
  • HY-14648S5
    Dexamethasone-d3-1
    		Inhibitor 98.02%
    Dexamethasone-d3-1 (Hexadecadrol-d3-1; Prednisolone F-d3-1) is a deuterium labeled Dexamethasone (HY-14648). 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-d<sub>3</sub>-1
  • 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.
    Complement C1s-IN-1
  • HY-N7401
    Entadamide-A-β-D-glucopyranoside
    		98.15%
    Entadamide-A-β-D-glucopyranoside is one of the major components in the seeds of Entada phaseoloides. Entadamide-A-β-D-glucopyranoside has anti-complement activitie.
    Entadamide-A-β-D-glucopyranoside
  • HY-110136
    PMX 205
    		Antagonist 99.54%
    PMX 205 is a potent complement C5a receptor (C5aR; CD88) antagonist.
    PMX 205
  • HY-W371165
    C1s-IN-1 trihydrochloride
    		Inhibitor
    C1s-IN-1 trihydrochloride (Compound A1) is the selective inhibitor for C1s protease with the Ki of 5.8 μM. C1s-IN-1 trihydrochloride inhibits cleavage of C2 by C1s with an IC50 of 85 μM, inhibits the activation of classic pathway with an IC50 of 22 μM. C1s-IN-1 trihydrochloride is the competitive inhibitor for thrombin with the Ki of 51.2 μM.
    C1s-IN-1 trihydrochloride
  • HY-129072
    Isocyclosporin A
    		98.5%
    Isocyclosporin A is a degradation product of the immunosuppressant Cyclosporin A.
    Isocyclosporin A
  • HY-50874
    BCX 1470
    		Inhibitor
    BCX 1470 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
  • HY-P10639
    C5aR2 agonist P32
    		Agonist 99.82%
    C5aR2 agonist P32 (Ac-RHYPYWR-OH) is a C5aR2-selective agonist. C5aR2 agonist P32 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
  • 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.
    Complement factor D-IN-2
  • HY-P99886
    Pexelizumab
    		Inhibitor
    Pexelizumab (h5G1. 1-SC) is a humanized scFv monoclonal antibody directed against the C5 complement component. Pexelizumab inhibits apoptosis and leukocyte infiltration. Pexelizumab can be used for the research of cerebral IR injury and myocardial infarction.
    Pexelizumab
  • 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.
    IONIS-FB-LRx
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity