目的 基于气相色谱-质谱联用技术(GC-MS)的代谢组学方法研究博落回急性染毒模型大鼠心肌代谢产物的变化,寻找体内特征性代谢产物并探索相关毒性机制.方法 博落回总碱提取物溶液灌胃给药,剂量382 mg/kg,对照组给予相同剂量的空白溶液,利用GC-MS方法对心肌样本进行分析,利用偏最小二乘法-判别分析对结果进行模式识别,通过 VIP(The variable importance in the projection)值＞1 以及 Student's t 检验(P＜0.01)筛选出具有特征改变的差异代谢产物.结果 与对照组相比较,发现21种潜在的特征性代谢产物,经KEGG通路富集分析发现,这些代谢产物主要参与甘氨酸、丝氨酸和苏氨酸代谢途径、甘油酯代谢途径以及丙酮酸代谢途径.结论 经过对博落回染毒大鼠心肌代谢研究,发现了与中毒密切相关的代谢产物信息,为其中毒机制研究及法医学鉴定提供参考.
Study on metabolic changes of myocardial tissue in rats exposed to macleaya cordata
Objective To analyze the metabolic changes of myocardial tissue in rats under acute exposure to macleaya cordata by gas chromatography mass spectrometry(GC-MS),explore forensic identifications of its characteristic metabolites,and verify its toxicological mechanism in poisoning cases.Methods The rats in the exposure group were given 382 mg/kg macleaya extract solution by gavage,and the rats in the control group were given the same dose of solvent.The myocardial samples were analyzed by GC-MS,and pattern recognition was conducted through partial least squares discriminant analysis(PLSDA).The differential metabolites with characteristic changes were identified by variable importance projection(VIP value＞1)and Student's t test(P＜0.01).Results Compared with the control group,21 potential characteristic metabolites were identified.Through KEGG pathway enrichment analysis,it was found that these metabolites were mainly involved in the pathways of glycine,serine and threonine metabolism;pyruvate metabolism and glycerolipid metabolism.Conclusion Through the study of myocardial metabolism in rats exposed to macleaya cordata,we found the information on metabolites closely related to poisoning,which provides new insight and reference for studies on the mechanisms of macleaya cordata poisoning in the field of forensic medicine.
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