基于核磁共振代谢组学法研究雷公藤多苷片对大鼠代谢的影响

目的:采用核磁共振(NMR)代谢组学法研究雷公藤多苷片对大鼠代谢的影响.方法:以生物核磁共振技术结合模式识别和偏最小二乘-辨别分析法(PLS-DA)测定和分析灌胃不同剂量雷公藤多苷片混悬液后正常大鼠尿液内源性代谢物的变化,研究雷公藤多苷片对正常大鼠代谢过程的影响,并结合组织病理学检查结果进行验证.结果:不同剂量给药后,尿样中牛磺酸、葡萄糖、氮氧三甲胺水平均有所上升,而三羧酸循环中间产物柠檬酸和α-酮戊二酸水平均有所降低.偏最小二乘分析表明,给药组与对照组的代谢谱有明显差异.肾组织病理学检查未见改变,但肝组织病理学检查有明显病变.结论:雷公藤多苷片对正常大鼠代谢过程具有显著影响,其机制可能与肝线粒体功能受损及三羧酸循环中能量代谢异常有关,并导致葡萄糖代谢紊乱.代谢组学研究有助于认识雷公藤多苷片的毒性作用机制.

Study on influence of glucoside Tripterygium total tablets on metabolism in rats by NMR metabonomic technique

Objective : To investigate the toxic effects of Glucoside Tripterygium total on rats with nuclear magnetic resonance (NMR)-based metabonomic method. Method : The influence of intragastric administration of Glucoside Tripterygium total suspension at two different doses on endogenetic metabolites in normal rat urine was determined with bio-NMR method then analyzed by pattern recognition technique and partial least-squares discriminant analysis (PLS-DA). Histopathological analysis was carried out. Result : Escalations of concentrations of urinary taurine, TMAO and glucose as well as reductions of concentrations of urinary citrate and 2-oxoglutarate were found by analysis of the 1H-NMR spectra, which was coincident with the result of histopathological analysis. The result of pathological examination indicated that pathologic change was not observed in nephridial tissue, but there were obvious changes in hepatic tissue. Conclusion : The urinary metabomic spectra were closely associated with the hepatic toxicity, which manifested the mitochondrial dysfunctions, the abnormal energy metabolism in TCA cycle as well as the abnormal glucose metabolism.