Mechanisms and application of triptolide against breast cancer / 中国中药杂志

Overtaking lung cancer,breast cancer is now the most commonly diagnosed cancer seriously threatening people's health and life. As the main effective component of Tripterygium wilfordii,triptolide( TP) has attracted increasing attention due to its multitarget and multi-pathway anti-tumor activity. Recent studies have revealed that breast cancer-sensitive TP enables the inactivation of breast cancer cells by inducing tumor cell apoptosis and autophagy,interfering in tumor cell metastasis,resisting drug resistance,arresting tumor cell cycle,and influencing tumor microenvironment. It has been recognized as a promising clinical antitumor agent by virtue of its widely accepted therapeutic efficacy. This paper reviewed the anti-breast cancer action and its molecular mechanisms of TP on the basis of the relevant literature in the past ten years,and proposed application strategies in view of the inadequacy of TP to provide a reference for further research on the application of TP in the treatment of breast cancer.

Investigation of inductive effect of triptolide on cytochrome P450 s in rat hepatocytes and HepG2 cells and possible mechanism / 中国药理学通报

Aim Toinvestigatingtheinductionof CYPs in hepatocytes or HepG2 cells by triptolide(TP) andthepossiblemechanism.Methods AfterTPtreat-ment,the expression of CYPs in rat primary hepato-cytes or human HepG2 cells was detected by real-time PCR and Western blot assays.Specific inhibitors or gene knockdown method were employed to analyze the possiblemechanism.Results Theexpressionof CYP1A2,2C7,2C11,2C12,2D2,2E1 and 3A1 in rat primary hepatocytes was induced by TP.The fold was 19,2,31,3,21,88 and 34 at 50 nmol·L-1, respectively while at 100 nmol·L-1 it was 20,5,30,23,61,83 and 38,respectively.In HepG2 cells,the expression of human CYP1A1,2B6,2C9,2C19, 2D6,2E1 and 3A4 was also induced by TP.The ac-tivities of nuclear receptor PXR and CAR were inhibi-ted.TP upregulated p53 expression,and the induction of several CYPs caused by TP was blocked when p53 wasinhibited.Conclusions TPinducesCYPsexpres-sion in rat hepatocytes and HepG2 cells.Nuclear re-ceptors may not be involved in TP induced CYPs, while the mechanism may partly attribute to p53.