基于1H-NMR代谢组学分析研究平肝方药对高血压大鼠大脑额叶皮质区的影响

摘要

目的：采用核磁共振氢谱（1H-NMR）结合模式识别方法研究高血压模型及平肝方药干预后大鼠大脑额叶皮质区组织代谢组学变化，探讨高血压病和大脑损伤间有价值信息，为平肝方药的作用机制研究提供科学依据。方法：随机将大鼠分为4组：正常对照组、高血压模型组、卡托普利组和平肝方药组，连续给药14天后取各组大鼠额叶组织。采用1H-NMR方法结合模式识别技术检测分析四组大鼠额叶区组织，分别寻找其特征性代谢产物。结果：主成分分析及偏最小二乘判别分析结果显示，卡托普利组和平肝方药组明显异于高血压模型组，且平肝方药组与卡托普利组大鼠样本分类趋势明显，提示平肝方药能显著改善大鼠机体的整体代谢；4种代谢产物鉴定为葡萄糖、半乳糖、多巴胺和琥珀酸。结论：高血压损伤额叶组织可能主要表现在能量代谢和神经损伤方面，而平肝方药在有效降压同时，通过影响其代谢产物来缓解疾病引起的物质代谢异常。%This article applied 1H-NMR-based metabolic technology combined with pattern recognition method to study metabolic changes of brain frontal cortex among spontaneously hypertensive rats ( SHR ) and evaluate Pingan prescription treatment effect . It was aimed to explore the valuable information between hypertension and brain damage in order to provide a scientific basis for the mechanism of Pingan prescription . Rats were ran-domly divided into four groups , which were the normal control group , hypertension model group , captopril group and the Pinggan prescription group . Medications were administered continuously for 14 days . Then , the frontal lobe tissues of rats in each group were removed . The 1H-NMR based metabolic technology combined with pattern recognition method were used in the detection and analysis of frontal lobe tissues of rats from four group in order to find characteristic metabolites . The results of the principal components analysis ( PCA ) and partial least squares discriminant analysis (PLS-DA) showed that captopril group and Pinggan prescription group were significantly different from the hypertension model group . And the classification tendency of rat sam-ples from the Pinggan prescription group and the captopril group were obvious , which suggested that Pinggan prescription can obviously improve the rat's overall metabolism. The four metabolites were identified as glucose, galactose , dopamine and succinic acid . It was concluded that hypertension damaging frontal tissues may mainly express in energy metabolism and nerve damage . And Pinggan prescription can effectively reduce blood pressure and relieve metabolic abnormalities due to disease through the influence on its metabolites .