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-P99767
    Olendalizumab
    		Inhibitor 98.32%
    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-129072
    Isocyclosporin A
    		98.5%
    Isocyclosporin A is a degradation product of the immunosuppressant Cyclosporin A.
    Isocyclosporin A
  • 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-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-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-P990998
    Greziprubart
    		Inhibitor
    HY-P990998 is an C5a-targeting IgG1κ type human antibody, the recommed isotype control is Human IgG1 kappa, Isotype Control (HY-P99001).
    Greziprubart
  • 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
  • HY-P10274
    CM05
    		Inhibitor
    CM05 is a bromo-fatty acid. CM05 can be used to modify ornithodoros moubata complement inhibitor (OmCI) and extend the half-life of OmCI.
    CM05
  • HY-P10994
    Eps8 peptide 327
    		Inhibitor
    Eps8 peptide 327 is an HLA-A*2402-restricted peptide antigen derived from Eps8 protein. Eps8 peptide 327 has potent antitumor activity with significant cytotoxicity. Eps8 peptide 327 effectively inhibits cancer cells proliferation, induces apoptosis and disrupts EGFR signal pathway by inhibiting downstream signals (such as IL-2, TNF-α and IFN-γ) expression and the Eps8/EGFR interaction. Eps8 peptide 327 significantly inhibits tumor growth in HT-29 xenograft mcie models.
    Eps8 peptide 327
  • HY-P10788
    CK3 peptide
    		Inhibitor
    CK3 peptide is an NRP-1 targeting peptide with the amino acid sequence CLKADKAKC. The CK3 peptide specifically binds to NRP-1 to target breast cancer cells. Single-photon emission computed tomography (SPECT) and near-infrared fluorescence (NIRF) imaging show significant accumulation of CK3 peptide in xenograft tumors in nude mice. CK3 peptide can be used for molecular imaging studies of breast cancer.
    CK3 peptide
  • HY-N10400
    Campneoside II
    		Inhibitor
    Campneoside II is a compound isolated from Paulownia tomentosa var. tomentosa wood. Campneoside II exhibits excellent anti-complement activity.
    Campneoside II
  • HY-147606
    Factor B-IN-4
    		Inhibitor
    Factor B-IN-4 (Example 13 target compound) is a potent complement factor B inhibitor, with an IC50 of 1 μM. Factor B-IN-4 can be used for the research of diseases related to inflammation and immunity.
    Factor B-IN-4
  • HY-163378
    C5aR1 antagonist 1
    		Antagonist
    C5aR1 antagonist 1 (Compound 7e) is an orally active C5a receptor 1 (C5aR1) antagonist. C5aR1 antagonist 1 is active in DISCO and migration assays, with IC50 values of 38 nM and 17 nM, respectively. C5aR1 antagonist 1 can be used for the research of acute and chronic inflammatory diseases.
    C5aR1 antagonist 1
  • HY-P1640
    (Trp63,Trp64)​-​C3a(63-77)
    		Agonist
    (Trp63,Trp64)​-​C3a(63-77) is a C3a synthetic analogue peptide, which exhibits Ca2+ stimulating efficacy in human neutrophils and hC3aR or mC3aR expressing RBL-2H3 cells with EC50 of 9.5, 2.0 and 0.8 nM, respectively.
    (Trp63,Trp64)​-​C3a(63-77)
  • HY-NP0194B
    C1q Protein (Rabbit)
    C1q Protein (Rabbit) is the subunit of the complement system. C1q Protein (Rabbit) recognizes a variety of ligands, and is involved in maintaining immune system balance, promoting tissue repair, and defending against pathogens.
    C1q Protein (Rabbit)
  • HY-P4971
    C5a Anaphylatoxin (human)
    		Modulator
    C5a Anaphylatoxin (human) is a pro-inflammatory peptide and a leukocyte chemoattractant. C5a Anaphylatoxin (human) can be used to study inflammation and immunity, such as allergic asthma.
    C5a Anaphylatoxin (human)
  • HY-P3502A
    Zilucoplan TFA
    		Inhibitor
    Zilucoplan TFA (RA101495), a 15-amino acid macrocyclic peptide, is a potent complement component 5 (C5) inhibitor. Zilucoplan TFA can be used in research of immune-mediated necrotising myopathy (IMNM).
    Zilucoplan TFA
  • HY-P10827
    PIC1 PA
    		Inhibitor 98.37%
    PIC1 PA, a 15 amino-acid peptide, is a potent PIC1 analog that inhibits classical pathway mediated complement activation. PIC1 PA functionally disrupts the C1s-C1r-C1r-C1s/MASPs interaction with collagen-like region (CLR) of C1q/MBL, respectively. PIC1 PA specifically binds to the CLR of C1q and bounds to purified C1q with a mean equilibrium dissociation constant (KD) of 33.3 nM.
    PIC1 PA
  • HY-P10995
    TAT-327
    		Inhibitor
    TAT-327 is cell-penetrating peptide. TAT-327 selectively inserts into cancer cell membranes and shows potent antitumor activity. TAT-327 effectively inhibits cancer cells proliferation, induces apoptosis and disrupts EGFR signal pathway by inhibiting downstream signals (such as IL-2, TNF-α and IFN-γ) expression and the Eps8/EGFR interaction. TAT-327 significantly inhibits tumor growth in HT-29 xenograft mcie models.
    TAT-327
  • HY-P3204A
    POT-4 TFA
    		Inhibitor
    POT-4 TFA (AL-78898A TFA), a Compstatin derivative, is a potent inhibitor of complement factor C3 activation. POT-4 TFA can be used for age-related macular degeneration research.
    POT-4 TFA
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity