KMID : 1161420130160010026
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Journal of Medicinal Food 2013 Volume.16 No. 1 p.26 ~ p.33
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Dandelion Leaf Extract Protects Against Liver Injury Induced by Methionine- and Choline-Deficient Diet in Mice
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Davaatseren Munkhtugs
Hur Haeng-Jeon Yang Hye-Jeong Hwang Jin-Taek Park Jae-Ho Kim Hyun-Jin Kim Myung-Sunny Kim Min-Jung Kwon Dae-Young Sung Mi-Jeong
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Abstract
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We investigated the hepatoprotective effects of the extract of dandelion leaves (EDL) on a murine model of methionine- and choline-deficient (MCD) diet-induced nonalcoholic steatohepatitis (NASH). C57BL/6?mice were fed for 4 weeks with one of the following diets: control diet (Cont), MCD diet (MCD), MCD diet supplemented with EDL at 200?mg/kg body weight¡¤daily (MCD+D200), and MCD diet supplemented with EDL at 500?mg/kg body weight¡¤daily (MCD+D500). Hepatic function was assessed by evaluating the following parameters: liver histology; plasma levels of alanine aminotransferase (ALT), triglyceride (TG), malondialdehyde (MDA), and reduced glutathione (GSH); expression levels of TNF-¥á and IL-6; and levels of caspase-3 and pJNK/JNK protein. Histopathological evaluations revealed that addition of EDL to the MCD diet dampens the severity of the clinical signs of NASH. Moreover, EDL led to a significant decrease in the serum levels of ALT, hepatic TG, and MDA, and in the expression levels of TNF-¥á, and IL-6; on the contrary, the levels of reduced GSH increased. At the post-transcriptional level, EDL significantly decreased the activation of procaspase-3 to active caspase-3, and the phosphorylation of JNK. These results suggest that the beneficial effects of EDL on NASH are mainly due to its antioxidant and anti-inflammatory activities.
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KEYWORD
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fatty liver, hepatotoxicity, inflammation, oxidative stress, Taraxacum officinale
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