A novel synthetic dibenzocyclooctadiene lignan analog XLYF-104-6 attenuates lipopolysaccharide-induced inflammatory response in RAW264.7 macrophage cells and protects BALB/c mice from sepsis

Abstract

The wide range of inflammation mechanisms under control by NF-κB makes this pathway as an attractive target for new anti-inflammatory drugs. Herein, we showed that a new dibenzocyclooctadiene lignan analog XLYF-104-6, with a chemical name of 1,2,3,10,11-pentamethoxydibenzocycloocta-6,7-[c] pyrrole-1,3-dione, inhibited lipopolysaccharide (LPS)-induced NF-κB activation in RAW264.7 cells through preventing IκBα degradation and p65 nuclear translocation. The inhibitory activity of this compound on NF-κB activation contributes to the reduction of LPS-induced TNF-α and IL-6 productions. Notably, XLYF-104-6 suppressed LPS-induced iNOS expression and NO production in a NF-κB independent manner, since IKK inhibitor BAY 11-7082 has failed to exert similar inhibitory effect on iNOS expression and NO production. In addition, XLFY-104-6 also exerted anti-inflammatory action in endotoxemic mice by decreasing plasma LPS-induced TNF-α and IL-1β levels as well as increasing plasma LPS-induced IL-10 concentrations. These findings suggest XLYF-104-6 could act as a leading compound for developing a potential anti-inflammatory drug.

Keywords: Anti-inflammatory drug; Aprotinin (Pubchem CID: 16130295); BAY 11-7082 (Pubchem CID: 5353431); DAPI (Pubchem CID: 2954); Dibenzocyclooctadiene lignin; G418 (Pubchem CID: 123865); Leupeptin (Pubchem CID: 72429); Lipopolysaccharide; Lipopolysaccharide (Pubchem CID: 11970143); MTT (Pubchem CID: 64965); NF-κB; PMSF (Pubchem CID: 4784); Pepstatin (Pubchem CID: 5478883); Sepsis; Sodium fluoride (Pubchem CID: 5235); iNOS expression and NO production.