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SC-75741 is an inhibitor of NF-κB (EC₅₀ = 0.1 μM in an NF-κB reporter gene assay). It inhibits replication of human, avian, and swine influenza virus strains in MDCK cells in a concentration-dependent manner. It also reversibly inhibits replication of H5N1 and H7N7 avian influenza virus strains in human A549 cells. In vivo, SC-75741 (15 mg/kg, i.p.) reduces viral mRNA and production of IL-6 and CXCL10/IP-10 in the lungs of H5N1 infected mice. SC-75741 is also protective against H5N1 and H7N7 infection in mice when administered for 7 days prior to or up to 4 days post infection.

SC75741 is a potent NF-κB inhibitor with EC50.

NF-κB