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Complement System

The complement system, also known as complement cascade, is a part of the immune system that enhances (complements) the ability of antibodies and phagocytic cells to clear microbes and damaged cells from an organism, promote inflammation, and attack the pathogen's cell membrane. It is part of the innate immune system, which is not adaptable and does not change during an individual's lifetime. The complement system can, however, be recruited and brought into action by antibodies generated by the adaptive immune system.

  • Dexamethasone
    T107650-02-2
    Dexamethasone (Hexadecadrol) is a glucocorticoid receptor agonist and an IL receptor modulator. Dexamethasone has anti-inflammatory and immunosuppressive activity and induces autophagy. Dexamethasone inhibits LPS-induced inflammatory responses in macrophages.
    • $29
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  • Avacopan
    T82231346623-17-3
    Avacopan (CCX168) is an orally administered small-molecule C5aR ( IC50 : 0.1 nM.)antagonist that blocks the effects of C5a and prevents the development of GN induced by anti-myeloperoxidase antibodies in a murine model of AAV.
    • $62
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  • ADH-503
    T77762055362-74-6
    ADH-503 (GB1275) is a potent agonist of the integrin CD11b to mitigate myeloid cell immunosuppression.
    • $48
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  • Cyclosporin A
    T094559865-13-3
    Cyclosporin A is a naturally occurring cyclic polypeptide that is the active metabolite of a fungus. Cyclosporin A is an immunosuppressant that binds to procyclins and inhibits calcineurin (IC50=7 nM).
    • $36
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  • TLQP 21 acetate
    TP2296L
    TLQP 21 acetate is a potent agonist of G-protein-coupled receptor complement-3a receptor 1 (C3aR1). The EC50 values are 10.3 μM for mouse and 68.8 μM for human. TLQP 21 acetate is a VGF-derived peptide with endocrine and extraendocrine properties.
    • $185
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  • LEP(116-130)(mouse)TFA(258276-95-8 free base)
    TP1305L
    LEP(116-130)(mouse) is a synthetic leptin peptide fragment.
    • $79
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  • PMX 53 acetate(219639-75-5 free base)
    TP2334852629-88-0
    PMX-53 is a potent and orally active CD88 (C5aR) antagonist (IC50: 20 nM) and inhibits C5a-induced neutrophil myeloperoxidase release and chemotaxis with IC50 values of 22 nM and 75 nM, respectively. PMX-53 is also an agonist of Mas-related gene 2 (MrgX2).
    • $189
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  • PMX 205 acetate(514814-49-4 free base)
    T12506L1
    PMX 205 acetate is an antagonist of complement C5a receptor (C5aR; CD88).
    • $113
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  • CP-289
    T601611349637-14-4
    CP-289 is a potent C5a receptor antagonist with IC50 of 1 μM.
    • $117
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  • C3a 70-77 2TFA(63555-63-5(free base))
    T7497L
    C3a 70-77 2TFA(63555-63-5(free base)) (Complement 3a (70-77)) is an octapeptide corresponding to the COOH terminus of C3a.
    • $82
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  • BCX 1470 hydrochloride
    T13568L In house
    BCX 1470 hydrochloride is a potent serine protease inhibitor with anti-inflammatory activity that inhibits the ester hydrolysis and haemolytic activity of factor D and C1s, and can be used to study oedema.
    • $139
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  • Complement C5-IN-1
    T108632365402-67-9In house
    Complement C5-IN-1 is a small-molecule inhibitor of complement component 5 protein (C5).
    • $155
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  • EG01377 2HCl
    T11154L2749438-61-5In house
    EG01377 2HCl is a potent, bioavailable and selective inhibitor of neuropilin-1 (NRP1) with a Kd value of 1.32 μM and an IC50 value of 609 nM for both EG01377 2HCl against NRP1-a1 and NRP1-b1.EG01377 exhibits anti-angiogenic, antimigratory and antitumor activities.
    • $148
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  • W-54011
    T17250405098-33-1
    W-54011 is a potent non-peptide C5a receptor antagonist. W-54011 inhibits the binding of 125I-labeled C5a to human neutrophils (Ki: 2.2 nM). W-54011 inhibits C5a-induced intracellular Ca2+ mobilization, chemotaxis, and generation of ROS in human neutrophi
    • $77
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  • C5a Anaphylatoxin (human)
    T801311816940-05-2
    C5a Anaphylatoxin (human) is a pro-inflammatory peptide that functions as a leukocyte chemoattractant, utilized in researching inflammation and immune responses, including allergic asthma [1] [2].
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  • Tesidolumab
    T768311531594-08-7
    Tesidolumab (LFG316) is a fully human IgG1/λ anti-C5 monoclonal antibody. Tesidolumab (LFG316) has an inhibitory effect on crovalimab and C5, blocking the cutting of C5 and preventing the subsequent formation of membrane attack complex, which can be used to study extravascular hemolysis.
    • $198
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  • 3-Phenoxybenzaldehyde
    T6438839515-51-0
    3-Phenoxybenzaldehyde is a complement (classical pathway) inhibitor with IC50 of 1388μM.
    • $33
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  • POT-4 acetate
    T9695L
    POT-4 acetate inhibits Complement C3 activation. POT-4 acetate can be used for studies about age-related macular degeneration.
    • $187
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  • Ravulizumab
    T768671803171-55-2
    Ravulizumab (ALXN1210) is a humanized monoclonal antibody targeting complement factor 5 that specifically binds to human complement protein C5 with high affinity to block complement activation. Ravulizumab can be used for the prevention and treatment of paroxysmal sleep hemoglobinuria, atypical hemolytic uremic syndrome and myasthenia gravis.
    • $247
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  • Sutimlimab
    T767022049079-64-1
    Sutimlimab is a novel monoclonal antibody targeting complement protein C1. Sutimlimab is commonly used as a C1 inhibitor to treat cold agglutina-associated hemolysis.
    • $263
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  • C5a Receptor agonist, mouse, human
    T80265144555-06-6
    C5a Receptor Agonist (mouse, human) is a bioactive peptide derived from the C-terminus of the complement fragment 5 anaphylatoxin (C5a), functioning as an agonist for the C5a receptor. This peptide plays a role in mediating inflammatory responses by promoting chemotaxis, leukocyte degranulation, enhanced vascular permeability, and cytokine production. Its agonistic activity is critically dependent on the presence of cyclohexylalanine at position 5 and the d-isomer of Arg at the terminal position.
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  • C3a (70-77)
    T749763555-63-5
    C3a (70-77) is an octapeptide corresponding to the COOH terminus of C3a.
    • $82
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  • C3a Receptor Agonist
    T38287944997-60-8
    C3a Receptor Agonist (C3a receptor agonist 1) binds the G protein-coupled C3a receptors (C3aRs) in the immune system complement pathway. Activation of C3aR prevents neutrophils from being mobilized in a model of intestinal ischemia-reperfusion injury. C3aRs are expressed on neural progenitor cells and immature neurons in adult mice. C3a stimulates differentiation of neural progenitor cells in vitro.
    • $89
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  • Compstatin
    TP1304206645-99-0
    Compstatin, a cyclic tridecapeptide, which was originally discovered from phage-display libraries, is a highly potent and selective C3 inhibitor.
    • $89
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  • Iptacopan hydrochloride
    T91891646321-63-2
    Iptacopan hydrochloride (LNP023 hydrochloride) is an orally bioavailable, highly potent and highly selective factor B inhibitor with an IC50 of 10 nM. Iptacopan hydrochloride shows direct, reversible, and high-affinity binding to human factor B with a KD of 7.9 nM.
    • $155
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  • Danicopan
    T85091903768-17-1
    Danicopan (ACH-4471) (ACH-4471) is a selective, orally active small molecule factor D inhibitor with high binding affinity to human factor D, with a Kd value of 0.54 nM. Danicopan (ACH-4471) inhibits the activity of the complement replacement pathway (APC) and may block the complement replacement pathway in paroxysmal nocturnal hemoglobinuria (PNH) and atypical hemolytic uremic syndrome (aHUS).
    • $97
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  • CP-447697
    T601511092847-21-6
    CP-447697, a lipophilic C5a receptor antagonist, exhibits an IC50 of 31 nM. It is utilized in inflammation research.
    • $45
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  • Leukadherin-1
    T3638344897-95-6
    Leukadherin-1 is an allosteric activator of CD11b/CD18. Increasing CD11b/CD18-dependent cell adhesion to fibrinogen, Decreasing leukocyte motility and transendothelial migration; reduces inflammation.
    • $39
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  • Zilucoplan TFA
    T80083
    Zilucoplan TFA (RA101495), a 15-amino acid macrocyclic peptide, serves as a potent inhibitor of complement component 5 (C5). It has applications in the study of immune-mediated necrotising myopathy (IMNM) [1] [2].
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  • Lipoteichoic acid
    T4064656411-57-5
    Lipoteichoic acid, a polymer of Staphylococcus aureus cell wall, activates the complement system by inducing C3 and inhibiting CD55, and reduces fat deposition via the IGF-1 pathway.
    • $196
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  • Compstatin control peptide acetate
    TP2180L301544-78-5
    Compstatin control peptide acetate is an inhibitor of complement protein C3 by binding and inhibiting the cleavage of complement C3.
    • $189
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  • Eculizumab
    T9915219685-50-4
    Eculizumab is a recombinant humanized monoclonal antibody against the complement protein C5
    • $455
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  • Complement factor D-IN-2
    T383321903742-34-6
    Complement factor D-IN-2 is an inhibitor of Complement factor D and reduces the excessive activation of complement factor D.
    • $278
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  • JR14a
    T93162411440-41-8
    JR14a (5-(Bis(4-chlorophenyl)methyl)-3-methylthiophene-2-carbonyl)-l-arginine hydrochloride) is a potent antagonist of human complement C3a receptor.
    • $84
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  • NH2-C6-ARC186
    T78191
    NH2-C6-ARC186 is a derivative of the aptamer ARC186, featuring an NH2-C6 moiety that enables coupling to various peptides or molecules. As a potent complement inhibitor, it operates by inhibiting convertase-mediated C5 activation [1].
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  • NDT 9513727
    T24524439571-48-9
    NDT 9513727 is a potent, selective and competitive C5aR1 inverse agonist for the study of inflammatory and immune disorders.
    • $35
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  • (Z)-Leukadherin-1
    T133792055362-72-4
    (Z)-Leukadherin-1 (ADH-503 free base) is an allosteric agonist of CD11b.
    • $30
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  • SB290157 trifluoroacetate
    T128511140525-25-2
    SB290157 trifluoroacetate is a potent and selective antagonist of C3a receptor(IC50 of 200 nM).
    • $43
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