Mapping Metabolic Networks in the Brain by Ambient Mass Spectrometry Imaging and Metabolomics

化学 代谢组学 质谱成像 质谱法 色谱法
作者
Xuechao Pang,Shanshan Gao,Man Ga,Jin Zhang,Zhigang Luo,Yanhua Chen,Ruiping Zhang,Jiuming He,Zeper Abliz
出处
期刊:Analytical Chemistry [American Chemical Society]
卷期号:93 (17): 6746-6754 被引量:55
标识
DOI:10.1021/acs.analchem.1c00467
摘要

Metabolic networks and their dysfunction in the brain are closely associated with central nervous function and many psychogenic diseases. Thus, it is of utmost importance to develop a high-throughput imaging method for metabolic network mapping. Here, we developed a metabolic network mapping method to discover the metabolic contexts and alterations with spatially resolved information from the microregion of the brain by ambient-air flow-assisted desorption electrospray ionization mass spectrometry imaging and metabolomics analysis, which can be performed without any chemical derivatization, labels, or complex sample pretreatment. This method can map hundreds of different polar functional metabolites involved in multiple metabolic pathways, including not only neurotransmitters but also purines, organic acids, polyamines, cholines, and carbohydrates, in the rat brain. These high-coverage metabolite profile and microregional distribution information constitute complex networks that regulate advanced functions in the central nervous system. Moreover, this methodology was further used to discover not only the dysregulated metabolites but also the brain microregions involved in the pathology of a scopolamine-treated Alzheimer's model. Furthermore, this methodology was demonstrated to be a powerful visualizing tool that could offer novel insight into the metabolic events and provide spatial information about these events in central nervous system diseases.
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