干寒环境对大鼠尿液与血浆代谢成分的影响

目的:通过核磁共振氢谱(~1H-NMR)分析方法探讨干寒环境及饮食对大鼠尿液和血浆代谢物的影响,寻找可能的生物标记物及其相关代谢途径。方法:利用干寒环境及饮食作为应激源干预大鼠3周,采集其尿液和血浆样本,检测~1H-NMR,结合多变量数据分析方法筛选与鉴定相关代谢标志物,并分析代谢通路。结果:干寒属性环境及饮食导致尿液23种代谢物,血浆中15种代谢物发生了显著变化;这些代谢物与多种代谢通路的变化密切相关,包括三羧酸循环,丙酮酸代谢,糖酵解或糖异生,缬氨酸、亮氨酸和异亮氨酸生物合成,甘氨酸、丝氨酸和苏氨酸代谢,组氨酸代谢,乙醛酸和二羧酸代谢,丙氨酸、天冬氨酸和谷氨酸代谢通路。结论:干寒环境及饮食条件可导致体内多种代谢通路的变化,基于~1H-NMR的代谢组学研究方法具有解释机体病理生理动态性,整体性变化的优势,对于探索非确定性疾病因素发病机制有着重要的意义。

Effect of Dry-cold Environment on Metabolic Components in Urine and Plasma of Rats

Objective:Nuclear magnetic resonance hydrogen spectrum(¹H-NMR) was adopted to investigate the effect of dry-cold environment and diet on urine and plasma metabolites of rats,in order to find possible biomarkers and their related metabolic pathways. Method:The dry-cold environment and diet were used as a stressors to intervene rats for 3 weeks,urine and plasma samples were collected.¹H-NMR combined with multivariate data analysis were used to identify relevant metabolic markers and analyze their metabolic pathways. Result:The dry-cold environment and diet resulted in significant changes of 23 metabolites in urine and 15 metabolites in plasma;these metabolites were closely related to changes of various metabolic pathways,namely the tricarboxylic acid(TCA) cycle,pyruvate metabolism,glycolysis or gluconeogenesis,valine,leucine and isoleucine biosynthesis,glycine,serine and threonine metabolism,histidine metabolism;glyoxylic acid and dicarboxylic acid metabolism,alanine,aspartic acid and glutamate metabolism. Conclusion:Dry-cold environment and diet conditions can lead to the changes of various metabolic pathways in the body.The metabolomics based on ¹H-NMR has the advantage of explaining the pathophysiological dynamics and overall changes of the body,which is of great significance for exploring the pathogenesis of non-deterministic disease factors.