Compstatinis is a 13-residue cyclic peptide, and a potent inhibitor of the complement system.
C5aR-IN-2 is a potent inhibitor of C5aR. Increased level of C5a has been associated with disorders such as autoimmune disorders and inflammatory disorders. C5aR-IN-2 has the potential for the research of inflammation diseases (extracted from patent WO2022028586A1, compound 49)[1].
TLQP-21, a VGF-derived peptide endowed of endocrine and extraendocrine properties, is a potent G-protein-coupled receptor complement-3a receptor 1 (C3aR1) agonist (EC50: mouse TLQP-21=10.3 μM; human TLQP-21=68.8 μM). TLQP-21 activates C3aR1 to induce an increase of intracellular Ca2+. TLQP-21 is used for the research in regulation of nociception and other relevant physiologic functions[1][2].
Riliprubart (SAR445088) is an anti-C1s humanized monoclonal antibody that inhibits activated C1s in the proximal portion of the classical complement system. Riliprubart selectively inhibits activated C1s and prevents the enzymatic action of C1 on its substrates C4 and C2, thus inhibiting the formation of the classical pathway C3 convertase, C4b2a[1].
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[1][2].
LNP023 is a highly potent factor B (FB) inhibitor with an IC50 value of 10 nM. LNP023 shows direct, reversible, and high-affinity binding to human FB (KD=7.9 nM)[1].
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[1][2].
W-54011 is a potent, specific, and orally active CD88 (C5a receptor) antagonist. W-54011 inhibits the binding of 125I-labeled C5a to human neutrophils with a Ki value of 2.2 nM.IC50 value: 2.2 nM (Ki)Target: CD88 (C5a receptor)in vitro: W-54011 also inhibits C5a-induced intracellular Ca2+ mobilization, chemotaxis, and generation of reactive super oxide species in human neutrophils with IC50 alues of 3.1, 2.7, and 1.6 nM, respectively. In C5a-induced intracellular Ca2+ obilization assay with human neutrophils, W-54011 does not show agonistic activity at up to 10 μM and shifts rightward the concentration-response curves to C5a without depressing the maximal responses. in vivo: Examination on the species specificity of W-54011 reveals that it was able to inhibit C5a-induced intracellular Ca2+ mobilization in neutrophils of cynomolgus monkeys and gerbils but not mice, rats, guinea pigs, rabbits, and dogs. In gerbils, oral administration of W-54011 (3-30 mg/kg) inhibits C5a-induced neutropenia in a dose-dependent manner. The present report is the first description of an orally active non-peptide C5a receptor antagonist that could contribute to the treatment of inflammatory diseases mediated by C5a.
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[1][2]
Gefurulimab (ALXN-1720) is a human-derived bispecific antibody against complement C5 and albumin that binds C5 and blocks its activation[1].
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[1].