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Yao Xue Xue Bao. 1997 May;32(5):331-6.

[Protective action of corynoline, acetylcorynoline and protopine against experimental liver injury in mice].

[Article in Chinese]

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Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050.


Oral administration of two doses of corynoline, acetylcorynoline or protopine at 50 and 100 in an interval of 8 to 24 h before i.p. injection of CCl4, acetaminophen or thioacetamide significantly impeded the elevation of serum transaminase (SGPT) and liver damage in mice. The three compounds were found to inhibit CCl4-induced microsomal lipid peroxidation and CCl4 conversing to carbon monoxide in liver microsomes in vitro. Of these compounds, acetylcorynoline was shown to be more potent than corynoline and protopine. In addition, all the three compounds exhibited biphasic effects on the hepatic cytochrome P450, i.e. inhibition followed by induction, in mice.

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