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Cheongwon, South Korea

Yu J.-Y.,Ewha Womans University | Ha J.Y.,Ewha Womans University | Kim K.-M.,Novarex Co. | Jung Y.-S.,Pusan National University | And 2 more authors.
Molecules | Year: 2015

This study provides the scientific basis for the anti-inflammatory effects of licorice extract in a t-BHP (tert-butyl hydrogen peroxide)-induced liver damage model and the effects of its ingredients, glycyrrhizic acid (GA), liquiritin (LQ) and liquiritigenin (LG), in a lipopolysaccharide (LPS)-stimulated microglial cell model. The GA, LQ and LG inhibited the LPS-stimulated elevation of pro-inflammatory mediators, such as inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), tumor necrosis factor (TNF)-alpha, interleukin (IL)-1beta and interleukin (IL)-6 in BV2 (mouse brain microglia) cells. Furthermore, licorice extract inhibited the expression levels of pro-inflammatory cytokines (TNF-α, IL-1β and IL-6) in the livers of t-BHP-treated mice models. This result suggested that mechanistic-based evidence substantiating the traditional claims of licorice extract and its three bioactive components can be applied for the treatment of inflammation-related disorders, such as oxidative liver damage and inflammation diseases. © 2015 by the authors; licensee MDPI. Source


Shin J.H.,Korea Research Institute of Bioscience and Biotechnology | Lee C.W.,Korea Research Institute of Bioscience and Biotechnology | Oh S.J.,Korea Research Institute of Bioscience and Biotechnology | Yun J.,Korea Research Institute of Bioscience and Biotechnology | And 6 more authors.
Toxicological Research | Year: 2014

In this study, we investigated the hepatoprotective effects of aged black garlic (ABG) in rodent models of liver injury. ABG inhibited carbon tetrachloride-induced elevation of aspartate transaminase (AST) and alanine transaminase (ALT), which are markers of hepatocellular damage, in SD rats. D-galactosamineinduced hepatocellular damage was also suppressed by ABG treatment. However, ABG does not affect the elevation of alkaline phosphatase (ALP), a marker of hepatobilliary damage, in rats treated with carbon tetrachloride or D-galactosamine. We also examined the effect of ABG on high-fat diet (HFD)-induced fatty liver and subsequent liver damage. ABG had no significant effect on body weight increase and plasma lipid profile in HFD-fed mice. However, HFD-induced increase in AST and ALT, but not ALP, was significantly suppressed by ABG treatment. These results demonstrate that ABG has hepatoprotective effects and suggest that ABG supplementation might be a good adjuvant therapy for the management of liver injury. Source


Jung J.-C.,Novarex Co. | Lee Y.-H.,Yonsei University | Kim S.H.,Pusan National University | Kim K.-J.,Daekyeung College | And 3 more authors.
BMC Complementary and Alternative Medicine | Year: 2016

Background: Our previous study suggested that licorice has anti-inflammatory activity in lipopolysaccharide-stimulated microglial cells and anti-oxidative activity in tert-butyl hydroperoxide-induced oxidative liver damage. In this study, we evaluated the effect of licorice on chronic alcohol-induced fatty liver injury mediated by inflammation and oxidative stress. Methods: Raw licorice was extracted, and quantitative and qualitative analysis of its components was performed by using LC-MS/MS. Mice were fed a liquid alcohol diet with or without licorice for 4weeks. Results: We have standardized 70% fermented ethanol extracted licorice and confirmed by LC-MS/MS as glycyrrhizic acid (GA), 15.77±0.34μg/mg; liquiritin (LQ), 14.55±0.42μg/mg; and liquiritigenin (LG), 1.34±0.02μg/mg, respectively. Alcohol consumption increased serum alanine aminotransferase and aspartate aminotransferase activities and the levels of triglycerides and tumor necrosis factor (TNF)-aα. Lipid accumulation in the liver was also markedly induced, whereas the glutathione level was reduced. All these alcohol-induced changes were effectively inhibited by licorice treatment. In particular, the hepatic glutathione level was restored and alcohol-induced TNF-aα production was significantly inhibited by licorice. Conclusion: Taken together, our data suggests that protective effect of licorice against alcohol-induced liver injury may be attributed to its anti-inflammatory activity and enhancement of antioxidant defense. © 2016 Jung et al. Source


Choi K.-M.,Chungbuk National University | Jeon Y.S.,Chungbuk National University | Kim W.,Chungbuk National University | Lee A.,Chungbuk National University | And 10 more authors.
Food Science and Biotechnology | Year: 2014

Xanthigen, a mixture of brown seaweed and pomegranate seed extracts, has weight loss properties and lipid-lowering effects in mice and humans. This study elucidated the Xanthigen mechanism of an anti-obesity activity in high-fat diet (HFD)-fed mice. Xanthigen decreased expression of peroxisome proliferator-activated receptor γ (PPARγ) in the adipose tissue of HFD-fed mice. The serum leptin level and the adipose tissue leptin expression in mice fed HFD plus Xanthigen were significantly decreased, compared to HFD-fed mice. Phosphorylation of AMPactivated protein kinase (AMPK) α and β and acetyl-CoA carboxylase (ACC) in the adipose tissue of HFD plus Xanthigen-fed mice was elevated, and HMG-CoA reductase (HMGCR) expression was decreased. Xanthigen may have an anti-obesity activity by down-regulation of PPARγ and activation of the AMPK pathway. © 2014 The Korean Society of Food Science and Technology and Springer Science+Business Media Dordrecht. Source


Lee Y.-H.,Yonsei University | Kim J.-H.,Changwon National University | Kim S.H.,Pusan National University | Oh J.Y.,Pusan National University | And 4 more authors.
Nutrients | Year: 2016

It has been reported that barley leaves possess beneficial properties such as antioxidant, hypolipidemic, antidepressant, and antidiabetic. Interestingly, barley sprouts contain a high content of saponarin, which showed both anti-inflammatory and antioxidant activities. In this study, we evaluated the effect of barley sprouts on alcohol-induced liver injury mediated by inflammation and oxidative stress. Raw barley sprouts were extracted, and quantitative and qualitative analyses of its components were performed. The mice were fed a liquid alcohol diet with or without barley sprouts for four weeks. Lipopolysaccharide (LPS)-stimulated RAW 264.7 cells were used to study the effect of barley sprouts on inflammation. Alcohol intake for four weeks caused liver injury, evidenced by an increase in serum alanine aminotransferase and aspartate aminotransferase activities and tumor necrosis factor (TNF)-α levels. The accumulation of lipid in the liver was also significantly induced, whereas the glutathione (GSH) level was reduced. Moreover, the inflammation-related gene expression was dramatically increased. All these alcohol-induced changes were effectively prevented by barley sprouts treatment. In particular, pretreatment with barley sprouts significantly blocked inducible nitric oxide synthase (iNOS) and cyclooxygenase (COX)-2 expression in LPS-stimulated RAW 264.7. This study suggests that the protective effect of barley sprouts against alcohol-induced liver injury is potentially attributable to its inhibition of the inflammatory response induced by alcohol. © 2016 by the authors; licensee MDPI, Basel, Switzerland. Source

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