期刊
ANALYTICAL CHEMISTRY
卷 90, 期 7, 页码 4695-4701出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.analchem.7b05291
关键词
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资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) in Japan
- Grants-in-Aid for Scientific Research [16K19271, 15H02530] Funding Source: KAKEN
Recent improvements in ambient ionization techniques combined with mass spectrometry has enabled to achieve real-time monitoring of analytes of interest, even for biogenic molecules in living animals. Here, we demonstrate a newly developed system for in vivo real-time monitoring of metabolites in a living mouse brain. It consists of a semi-automated manipulation system and a unique probe electrospray ionization unit, which uses an extremely thin solid needle (tip dia.: 700 nm) for direct sampling and ionization, coupled to a conventional tandem mass spectrometer. The system successfully monitored 8 cerebrum metabolites related to central energy metabolism in an isoflurane-anesthetized mouse in real time with a 20 s interval. Moreover, our system succeeded in capturing dynamics of energy metabolism in a mouse administered with cannabinoid type-1 receptor agonist, which is known to disrupt cerebrum energy metabolism. The present system now opens the door to the next stage of cutting-edge technique in achieving in vivo real-time monitoring.
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