title: Acanthopanax koreanum Nakai modulates the immune response by inhibiting TLR 4-dependent cytokine production in rat model of endotoxic shock.
abstract: The hepatoprotective activity of Acanthopanax koreanum Nakai extract (AE) was investigated against D-Galactosamine/Lipopolysaccharide (D-GalN/LPS)-induced liver failure rats compared with that of acanthoic acid (AA) isolated from AE. Although D-GalN/LPS (250 mg/kg body weight/10 µg/kg body weight, i.p.) induced hepatic damage, pretreatments with AE (1 and 3% AE/g day) and AA (0.037% AA, equivalent to 3% AE/g day) alleviated the hepatic damage. This effect was the result of a significant decrease in the activity of alanine transaminase. Concomitantly, both the nitric oxide and IL-6 levels in the plasma were significantly decreased by high-dose AE (AE3) treatment compared to the GalN/LPS control (AE0). This response resulted from the regulation of pro-inflammatory signaling via a decrease in TLR4 and CD14 mRNA levels in the liver. While a high degree of necrosis and hemorrhage were observed in the AE0, pretreatment with AE3 and AA reduced the extent of hepatocyte degeneration, necrosis, hemorrhage and inflammatory cell infiltrates compared to the AE0. In conclusion, these results suggest that especially high-dose AE are capable of alleviating D-GalN/LPS-induced hepatic injury by decreasing hepatic toxicity, thereby mitigating the TLR 4-dependent cytokine release. The anti-inflammatory effect of AE could be contributing to that of AA and AE is better than AA.
authors.affiliation: Department of Nutritional Science and Food Management, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 120-750, Korea.
authors.forename: Myung-Gi
authors.initials: MG
authors.lastname: Jung
authors.affiliation: Department of Nutritional Science and Food Management, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 120-750, Korea.
authors.forename: Gyeong-Min
authors.initials: GM
authors.lastname: Do
authors.affiliation: Department of Biomedical Laboratory Science, Eulji University, Seongnam, Gyeonggi 461-713, Korea.
authors.forename: Jae-Ho
authors.initials: JH
authors.lastname: Shin
authors.affiliation: Jeju Biodiversity Research Institute, Jeju Technopark, Jeju 699-943, Korea.
authors.forename: Young Min
authors.initials: YM
authors.lastname: Ham
authors.affiliation: Jeju Biodiversity Research Institute, Jeju Technopark, Jeju 699-943, Korea.
authors.forename: Soo-Yeong
authors.initials: SY
authors.lastname: Park
authors.affiliation: Department of Nutritional Science and Food Management, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 120-750, Korea.
authors.forename: Oran
authors.initials: O
authors.lastname: Kwon
keywords: Acanthopanax koreanum Nakai; acanthoic acid; hepatotoxicity; inflammation; toll-like receptor 4