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-NP0194
    C1q Protein (human)
    C1q Protein (human) is a subunit of the complement system. C1q Protein (human) can bind to various ligands from self, non-self, and altered self, and participate in maintaining the balance of the immune system, promoting tissue repair, and defending against pathogens.
    C1q Protein (human)
  • 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-15701A
    (Z)-Leukadherin-1
    		Agonist ≥98.0%
    (Z)-Leukadherin-1 (ADH-503 free base) is an orally active and allosteric CD11b agonist. (Z)-Leukadherin-1 leads to the repolarization of tumor-associated macrophages, reduction in the number of tumor-infiltrating immunosuppressive myeloid cells, and enhances dendritic cell responses.
    (Z)-Leukadherin-1
  • HY-14648S
    Dexamethasone-d5
    		Inhibitor 99.86%
    Dexamethasone-d5 is the deuterium labeled Dexamethasone. 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[1][2].
    Dexamethasone-d<sub>5</sub>
  • HY-14648S3
    Dexamethasone-4,6α,21,21-d4
    		Inhibitor ≥99.0%
    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.
    Dexamethasone-4,6α,21,21-d<sub>4</sub>
  • HY-Y0641
    3-Phenoxybenzaldehyde
    		Inhibitor 99.21%
    3-Phenoxybenzaldehyde has weak complement classical pathway inhibition and hemolytic activity.
    3-Phenoxybenzaldehyde
  • 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.
    Factor D inhibitor 6
  • 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-153098A
    ARC186 sodium
    		Inhibitor
    ARC186 (sodium) is an unconjugated 40KDa PEG aptamer with a sequence identical to HY-147080 Avacincaptad pegol (ARC1905) sodium. ARC1905 is highly potent complement inhibitors that function by blocking the convertase-catalyzed activation of C5.
    ARC186 sodium
  • HY-P99786
    Pozelimab
    		Inhibitor 99.45%
    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.
    Pozelimab
  • HY-102034
    Complement factor D-IN-1
    		98.85%
    Complement factor D-IN-1 is a potent and selective small-molecule reversible factor d inhibitor, with IC50s of 0.006 and 0.05 μM in FD Thioesterolytic Fluorescent Assay and a MAC Deposition Assay, respectively.
    Complement factor D-IN-1
  • 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-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-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-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-163684
    Zoracopan
    		Inhibitor 99.85%
    Zoracopan is a selective complement factor D (CFD) inhibitor. When administered systemically (orally or intravenously), Zoracopan accumulates and is sustained-released in ocular tissues, primarily in the choroid-retinal pigment epithelium (C-RPE) and/or iridociliary body (I-CB).
    Zoracopan
  • 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
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity