OBJECTIVE The emerging role of chronic inflammation is the major degenerative diseases of modern society such as periodontitis,atherosclerosis,rheumatoid arthritis,Parkinson′s disease and even cancer.Eight components were isolated from Derris laxiflora Benth.,In this study,we found these compounds from Derris laxiflora Benth suppress lipopolysaccharide-induced inflammatory response in murine macrophage(RAW 264.7)cells.METHODS RAW 264.7cells were cultured in DMEM media supplemented with 10%(V/V)heated-inactivated FBS,penicillin 100U·mL-1 and streptomycin 100μg·mL-1.The cells were incubated at 37℃in a humidified atmosphere of 5%CO2in air.RAW264.7cells were seeded in a 24-well plate at a density of 2×105 mL-1 and then incubated with or without LPS(100ng·mL-1)in the absence or presence of compounds for 24 h.Effects of these isolates on NO production were measured indirectly by analysis of nitrite levels using the Griess reaction.Quercetin was used as a positive control.RESULTS ight components were isolated from Derris laxiflora Benth.,including three new pterocarpans 7,6′-dihydroxy-3′-methoxypterocarpan(1),derrispisatin(2),derriscoumaronochromone(3)and three new flavonoids cis-3,4′-dihydroxy-5,7-dimethoxyflavan(4),derriflavanone B(5),iso-lupinenol(6)as well as two known ones,lonchocarpol A(7)and lonchocarpol D(8).The structures of these new compounds were determined by analysis of their spectroscopic data.Raw264.7 cells were treated with the compounds from Derris laxiflora Benth for 24 h.Among them,compounds 5,7 and 8 significantly suppressed the NO production in LPS-treated RAW264.7 cells with IC50 values<10μg·mL-1.CONCLUSION In this study,we found that compounds from Derris laxiflora Benth suppresses lipopolysaccharide-induced inflammatory response in murine Raw264.7 cells. OBJECTIVE The emerging role of chronic inflammation is the major degenerative diseases of modern society such as periodontitis, atherosclerosis, rheumatoid arthritis, Parkinson’s disease and even cancer. Light components were isolated from Derris laxiflora Benth., In this study, we found these compounds from Derris laxiflora Benth suppress lipopolysaccharide-induced inflammatory response in murine macrophage (RAW 264.7) cells. METHODS RAW 264.7 cells were cultured in DMEM media supplemented with 10% (V / V) heated-inactivated FBS, penicillin 100 U mL- 1 and streptomycin 100 μg · mL -1. The cells were incubated at 37 ° C. in a humidified atmosphere of 5% CO 2 in air. RAW 264.7 cells were seeded in a 24-well plate at a density of 2 × 10 5 mL -1 and then incubated with or without LPS (100 ng · mL-1) in the absence or presence of compounds for 24 h. Effects of these isolates on NO production were measured indirectly by analysis of nitrite levels using the Griess reaction. Quercetin was used as a positive control. t components were isolated from Derris laxiflora Benth., including three new pterocarpans 7,6’-dihydroxy-3’-methoxypterocarpan (1), derrispisatin (2), derriscoumaronochromone (3) and three new flavonoids cis-3,4’-dihydroxy 5,7-dimethoxyflavan (4), derriflavanone B (5), iso-lupinenol (6) as well as two known ones, lonchocarpol A (7) and lonchocarpol D analysis of their spectroscopic data. Raw 264.7 cells were treated with the compounds from Derris laxiflora Benth for 24 h. Among them, compounds 5, 7 and 8 significantly suppressed the NO production in LPS-treated RAW 264.7 cells with IC50 values ​​<10 μg · ML-1. CONCLUSION In this study, we found those compounds from Derris laxiflora Benth suppresses lipopolysaccharide-induced inflammatory response in murine Raw 264.7 cells.