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KMID : 0613820100200010133
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Journal of Life Science
2010 Volume.20 No. 1 p.133 ~ p.141
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Mycelial Culture of Lentinus edodes Alleviates Rat Liver Toxicity Induced by Carbon Tetrachloride and Ethanol
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Ha Yeong-Lae
Kim Young-Suk
Ahn Chae Rin
Kweon Jung Min
Park Cherl-Woo
Ha Young Kweon
Kim Jeong-Ok
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Abstract
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The protective effect of a mixed powder from solid-cultured and liquid-cultured Lentinus edodes mycelia (2:1, w/w) (designate LED) on the carbon tetrachloride (CCl₄)- and ethanol-induced hepatotoxicity of male Sprague-Dawley (SD) rat was investigated. In the CCl₄-induced rat hepatotoxicity experiment, rats of 4 groups (6 rats/group) were administere with Normal (0.2 ml distilled water), Control (0.2 ml distilled water), LED (LED 200 ㎎/㎏ BW + 0.2 ml distilled water), and Silymarin (200 ㎎/㎏ BW + 0.2 ml distilled water), p.o., daily for 2 weeks. Afterwards, all groups except for the Normal group were subjected to abdominal injection with CCl₄ (CCl₄: corn oil, 1:1 v/v; 0.5 ml/㎏ BW). For the ethanol- induced rat hepatotoxicity experiment, rats were divided into 5 groups (5 rats/group): Normal; Pair-fed control (PFC); Control (ethanol); LED (ethanol + LED 200 ㎎/㎏ BW); and Silymarin (ethanol + silymarin 200 ㎎/㎏ BW). Rats of the Normal and PFC groups were fed a basal liquid diet, and rats of the Control, LED, and Silymarin groups were fed a liquid ethanol diet containing LED or Silymarin. Eight weeks later, blood and liver samples were collected to analyze biomarkers. In CCl₄-induced SD rats, LED elevated hepatic superoxide dismutase (SOD), catalase, and glutathione peroxidase (GSH peroxidase) activities and thiobarbituric reactive substances (TBARS) were reduced, resulting in the reduction of glutamate-oxalate transaminase (GOT), glutamate-pyruvate transaminase (GPT) and lactic dehydrogenase (LDH) activities in plasma. Similar results of these enzymes and biochemical markers in both liver tissues and plasma were seen in ethanol-induced hepatotoxicity of SD rats. In addition, elevated alcohol dehydrogenase (ADH) activity and reduced expression of cytochrome p450 mixed monooxygenase enzyme (CYP2E1) were seen in liver tissues from ethanol-treated rats by LED treatment. These effects of LED were similar to those of Silymarin. In in vitro experiments, LED showed antioxidant activity in a 2,2-diphenyl-1-picrylhydrazyl (DPPH) system and mouse liver mitochondria system induced by NADPH/Fe2+ and cumine hydroperoxide (CuOOH). These results indicate that LED protected SD rat hepatotoxicity, induced by CCl₄ and ethanol, through its antioxidative activity and might be useful as a material for protection from hepatoxicity in humans.
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KEYWORD
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Lentinus edodes mycelia, rat hepatotoxicity, glutamate-oxalate transaminase (GOT), glutamatepyruvate transaminase (GPT), antioxidant activity
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