当归不同炮制品挥发油给药大鼠的尿液代谢组学研究

分析当归(Angelica sinensis,AS)不同炮制品挥发油对正常大鼠尿液代谢产物的影响,揭示其影响大鼠体内可能的代谢途径。该实验将50只雄性Wister大鼠随机分成空白对照组和当归炭挥发油(volatile oils from charred AS,C-ASVO)、酒当归挥发油(volatile oils from parched AS with alcohol,J-ASVO)、土当归挥发油(volatile oils from parched AS with soil,T-ASVO)、油当归挥发油(volatile oils from parched AS with oil,Y-ASVO)组,每组10只,正常对照组灌胃等体积的0.5%的聚氧乙烯脱水山梨醇单油酸酯(吐温-80),各当归炮制品挥发油组每次灌胃挥发油剂量为0.176 m L·kg-1,连续给药3 d,利用大鼠代谢笼收集各组大鼠48 h的尿液。采用气相色谱质谱联用技术(gas chromatography-mass spectrometer,GC-MS)对大鼠尿液代谢物进行检测,并采用主成分分析方法(principal component analysis,PCA),正交偏最小二乘分析方法(orthogonal partial least-squares discriminant analysis,OPLS-DA)进行多元统计分析,通过变量重要性投影(variable importance in the projection,VIP)和t检验来选择差异代谢物。利用metabolic pathway analysis(Met PA)数据库构建差异代谢物的代谢通路。结果显示,与空白对照组相比,当归不同炮制品挥发油给药组大鼠尿液中31种代谢物有显著变化(P0.05),并且当归不同炮制品挥发油对正常大鼠尿液代谢产物的影响存在差异,其中以J-ASVO的影响程度略强于C-ASVO,T-ASVO和Y-ASVO。它们对体内代谢的影响可能主要集中于能量代谢、氨基酸代谢、脂质代谢以及糖代谢。该研究补充了当归不同炮制品挥发油药物代谢和作用机制,为其中药药理作用深层次的研究提供思路。

Effect of different processed volatile oils from Angelica sinensis on urinary metabolomics rats

Different processed volatile oils from AS on urine metabolites of normal rats were analyzed to reveal the possible metabolic pathways. Totally 50 male Waster rats were randomly divided into normal control group, C-ASVO group, J-ASVO group, T-ASVO group and Y-ASVO group, with 10 rats in each group. The normal group was given isovolumetric 0.5% polyoxyethylene sorbitan fatty acid ester(Tween-80), while the other groups were given 0.176 mL·kg^-1 different processed volatile oils from AS. Drugs were given for 3 successive days. The urine was collected at 48 h with metabolic cages. GC-MS was employed to detect the metabolic fingerprint of rat urine in different times. Principal component analysis(PCA) and orthogonal partial least-squares discriminant analysis(OPLS-DA) were adopted for a multivariate statistical analysis. Metabolites with potential differences were selected based on the results of variable importance in the projection(VIP) and t test. The metabolic pathway analysis(MetPA) database was built for different metabolites'' metabolic pathways. The results showed that compared with the normal group, 31 kinds of endogenous metabolites in the different processed volatile oils from AS groups change significantly(P<0.05). And there were differences in normal rat urine metabolites among the different processed volatile oils from AS, of which the influence degree of J-ASVO was slightly stronger than C-ASVO, T-ASVO, and Y-ASVO. Therefore, the metabolism effect may be focused on energy metabolism, amino acid metabolism, fatty acid metabolism and glucose metabolism. This study focused on metabolism and mechanism of different processed volatile oils from AS, and provided new ideas for pharmacological actions of traditional Chinese medicines.