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KMID : 1161420120150060549
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Journal of Medicinal Food
2012 Volume.15 No. 6 p.549 ~ p.556
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Antioxidant Properties of Taraxacum officinale Leaf Extract Are Involved in the Protective Effect Against Hepatoxicity Induced by Acetaminophen in Mice
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Colle Dirleise
Arantes Leticia Priscilla
Gubert Priscila
da Luz Sonia Cristina Almeida
Athayde Margareth Linde
da Rocha Joao Batista Teixeira
Soares Felix Alexandre Antunes
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Abstract
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Acetaminophen (APAP) hepatotoxicity has been related to several cases of hepatitis, cirrhosis, and hepatic transplant. As APAP hepatotoxicity is related to reactive oxygen species (ROS) formation and excessive oxidative stress, natural antioxidant compounds have been tested as an alternative therapy to diminish the hepatic dysfunction induced by APAP. Taraxacum officinale Weber (Family Asteraceae), commonly known as dandelion, is used for medicinal purposes because of its choleretic, diuretic, antioxidant, anti-inflammatory, and hepatoprotective properties. This study evaluated the hepatoprotective activity of T. officinale leaf extract against APAP-induced hepatotoxicity. T. officinale was able to decrease thiobarbituric acid?reactive substance levels induced by 200?mg/kg APAP (p.o.), as well as prevent the decrease in sulfhydryl levels caused by APAP treatment. Furthermore, histopathological alterations, as well as the increased levels of serum aspartate and alanine aminotransferases caused by APAP, were prevented by T. officinale (0.1 and 0.5?mg/mL). In addition, T. officinale extract also demonstrated antioxidant activity in vitro, as well as scavenger activity against 2,2-diphenyl-1-picrylhydrazyl and nitric oxide radicals. Our results clearly demonstrate the hepatoprotective effect of T. officinale against the toxicity induced by APAP. The possible mechanisms involved include its scavenger activities against ROS and reactive nitrogen species, which are attributed to the content of phenolic compounds in the extract.
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KEYWORD
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hepatoprotection, oxidative stress, phenolic compounds, scavenger
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