Hepatoprotective activity of reduohanxiao-tang (yuldahanso-tang) is related to the inhibition of beta-glucuronidase.
Beta-glucuronidase-inhibitory and hepatoprotective effects of Reduohanxiao-tang (Yuldahanso-tang), which has been used for liver diseases and stroke, on carbon tetrachloride (CCl4)-induced hepatotoxicity of rats were investigated. Reduohanxiao-tang potently inhibited beta-glucuronidases. Serum aspartate aminotransferase (AST), alanine aminotransferase (ALT) and lactic acid dehydrogenase (LDH) levels of the CCl4 group orally treated with Reduohanxiao-tang (100 mg/kg) were lowered to 54%, 71.5% and 66.1% of the CCl4-treated control group, respectively. Among the ingredients of the Reduohanxiao-tang, the rhizomes of Pueraria thunbergiana and Scutellaria baicalensis potently inhibited beta-glucuronidases and protected against CCl4-induced liver injury. Orally administered puerarin, which is a main component of Pueraria thunbergiana, showed potent hepatoprotective activity, but did not inhibit beta-glucuronidase. However, daidzein, which is produced from puerarin by human intestinal bacteria, potently inhibited beta-glucuronidase. These results suggest that beta-glucuronidase inhibition by herbal medicines may protect against CCl4-induced liver injury.
College of Oriental Medicine, Kyung Hee University 1 Hoegi, Dongdaemun-ku, Seoul, 130-701, Korea.
Hyung-Sup
HS
Bae
Young-Suk
YS
Kim
Ki-Ho
KH
Cho
Kyung-Sup
KS
Lee
Jung-Jin
JJ
Kim
Hae-Ung
HU
Lee
Dong-Hyun
DH
Kim
D000410:Alanine Transaminase / Q000097:blood; D000818:Animals; D001219:Aspartate Aminotransferases / Q000097:blood; D002252:Carbon Tetrachloride Poisoning; D056486:Chemical and Drug Induced Liver Injury / Q000201:enzymology / Q000209:etiology / Q000517:prevention & control*; D004365:Drugs, Chinese Herbal / Q000494:pharmacology*; D004968:Estrogens, Non-Steroidal / Q000494:pharmacology; D005966:Glucuronidase / Q000037:antagonists & inhibitors*; D066298:In Vitro Techniques; D007529:Isoflavones / Q000494:pharmacology; D007770:L-Lactate Dehydrogenase / Q000097:blood; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D014665:Vasodilator Agents / Q000494:pharmacology
D004365:Drugs, Chinese Herbal; D004968:Estrogens, Non-Steroidal; D007529:Isoflavones; D014665:Vasodilator Agents; C004742:daidzein; D007770:L-Lactate Dehydrogenase; D001219:Aspartate Aminotransferases; D000410:Alanine Transaminase; D005966:Glucuronidase; C033607:puerarin