We investigated the potential hepatoprotective effect of Radix Bupleuri(RB) by inducing acute liver injury(ALI) in an animal model using acetaminophen(APAP) after pretreatment with RB aqueous extract for three consecu...We investigated the potential hepatoprotective effect of Radix Bupleuri(RB) by inducing acute liver injury(ALI) in an animal model using acetaminophen(APAP) after pretreatment with RB aqueous extract for three consecutive days. Compared to those of the APAP group, the biochemical and histological results of the RB pretreatment group showed lower serum aspartate transaminase(AST) and alanine transaminase(ALT) levels as well as less liver damage. Pharmacokinetic study of the toxicity related marker acetaminophen-cysteine(APC) revealed a lower exposure level in rats, suggesting that RB alleviated APAP-induced liver damage by preventing glutathione(GSH) depletion. The results of cocktail approach showed significant inhibition of CYP2 E1 and CYP3 A activity. Further investigation revealed the increasing of CYP2 E1 and CYP3 A protein was significantly inhibited in pretreatment group,while no obvious effect on gene expression was found. Therefore, this study clearly demonstrates that RB exhibited significant protective action against APAP-induced acute live injury via pretreatment, and which is partly through inhibiting the increase of activity and translation of cytochrome P450 enzymes, rather than gene transcription.展开更多
目的研究艾迪注射液（斑蝥、人参、黄芪等）对体外人和大鼠肝微粒体中细胞色素P450（CYP450）酶的抑制作用,并比较种属差异性,评价其发生药物相互作用的可能性。方法在肝微粒体孵育体系中,将艾迪注射液分别与混合探针底物（非那西丁/CYP...目的研究艾迪注射液（斑蝥、人参、黄芪等）对体外人和大鼠肝微粒体中细胞色素P450（CYP450）酶的抑制作用,并比较种属差异性,评价其发生药物相互作用的可能性。方法在肝微粒体孵育体系中,将艾迪注射液分别与混合探针底物（非那西丁/CYP1A2、氯唑沙宗/CYP2E1、右美沙芬/CYP2D6、奥美拉唑/CYP2C19、甲苯磺丁脲/CYP2C9、咪达唑仑/CYP3A4、睾酮/CYP3A4）共同孵育,UPLC-MS/MS检测各探针底物的代谢物生成量,采用Graph Pad v5.0软件计算半数抑制浓度（IC50）。结果艾迪注射液对人和大鼠肝微粒体中CYP1A2、CYP2E1、CYP2D6、CYP2C19和CYP2C9的IC50值在4.101%~10.07%范围内,对人和大鼠肝微粒体中CYP3A4（咪达唑仑）的IC50值分别为169.6%和9.133%,对CYP3A4（睾酮）的IC50值分别为8.472%和49.25%。结论艾迪注射液对CYP1A2、CYP2E1、CYP2D6、CYP2C19、CYP2C9和CYP3A4有不同程度的抑制作用,其中CYP3A4具有明显的种属差异性。展开更多
基金supported by State Project for Essential Drug Research and Development of China(No.20152X09303001)
文摘We investigated the potential hepatoprotective effect of Radix Bupleuri(RB) by inducing acute liver injury(ALI) in an animal model using acetaminophen(APAP) after pretreatment with RB aqueous extract for three consecutive days. Compared to those of the APAP group, the biochemical and histological results of the RB pretreatment group showed lower serum aspartate transaminase(AST) and alanine transaminase(ALT) levels as well as less liver damage. Pharmacokinetic study of the toxicity related marker acetaminophen-cysteine(APC) revealed a lower exposure level in rats, suggesting that RB alleviated APAP-induced liver damage by preventing glutathione(GSH) depletion. The results of cocktail approach showed significant inhibition of CYP2 E1 and CYP3 A activity. Further investigation revealed the increasing of CYP2 E1 and CYP3 A protein was significantly inhibited in pretreatment group,while no obvious effect on gene expression was found. Therefore, this study clearly demonstrates that RB exhibited significant protective action against APAP-induced acute live injury via pretreatment, and which is partly through inhibiting the increase of activity and translation of cytochrome P450 enzymes, rather than gene transcription.
文摘目的研究艾迪注射液（斑蝥、人参、黄芪等）对体外人和大鼠肝微粒体中细胞色素P450（CYP450）酶的抑制作用,并比较种属差异性,评价其发生药物相互作用的可能性。方法在肝微粒体孵育体系中,将艾迪注射液分别与混合探针底物（非那西丁/CYP1A2、氯唑沙宗/CYP2E1、右美沙芬/CYP2D6、奥美拉唑/CYP2C19、甲苯磺丁脲/CYP2C9、咪达唑仑/CYP3A4、睾酮/CYP3A4）共同孵育,UPLC-MS/MS检测各探针底物的代谢物生成量,采用Graph Pad v5.0软件计算半数抑制浓度（IC50）。结果艾迪注射液对人和大鼠肝微粒体中CYP1A2、CYP2E1、CYP2D6、CYP2C19和CYP2C9的IC50值在4.101%~10.07%范围内,对人和大鼠肝微粒体中CYP3A4（咪达唑仑）的IC50值分别为169.6%和9.133%,对CYP3A4（睾酮）的IC50值分别为8.472%和49.25%。结论艾迪注射液对CYP1A2、CYP2E1、CYP2D6、CYP2C19、CYP2C9和CYP3A4有不同程度的抑制作用,其中CYP3A4具有明显的种属差异性。
