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Direct analysis of lipids in mouse brain using electrospray droplet impact/SIMS

机译:使用电喷雾液滴冲击/ SIMS直接分析小鼠大脑中的脂质

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Electrospray droplet impact (EDI)/secondary ion mass spectrometry (SIMS) is a new desorption/ionization technique for mass spectrometry in which highly charged water clusters produced from the atmospheric-pressure electrospray are accelerated in vacuum by 10 kV and impact the sample deposited on the metal substrate. EDI/SIMS was shown to enhance intact molecular ion formation dramatically compared to conventional SIMS. EDI/SIMS has been successfully applied to the analysis of mouse brain without any sample preparation. Five types of lipids, i.e. phosphatidylcholine (PC), phosphatidylserine, phosphatidylinositol (PI), galactocerebroside (GC) and sulfatide (ST), were readily detected from mouse brain section. In addition, by EDI/SIMS, six different regions of the mouse brain (cerebral cortex, corpus callosum, striatum, medulla oblongata, cerebellar cortex and cerebellar medulla) were examined. While GCs and STs were found to be rich in white matter, PIs were rich in gray matter.
机译:电喷雾液滴冲击(EDI)/二次离子质谱(SIMS)是一种新的质谱解吸/电离技术,其中大气压电喷雾产生的高电荷水团簇在真空中加速10 kV,并冲击沉积在其上的样品金属基板。与传统的SIMS相比,EDI / SIMS被证明可以显着增强完整分子离子的形成。 EDI / SIMS已成功地用于小鼠大脑的分析,无需任何样品前处理。从小鼠脑部容易检测出五种类型的脂质,即磷脂酰胆碱(PC),磷脂酰丝氨酸,磷脂酰肌醇(PI),半乳糖脑苷(GC)和硫苷脂(ST)。此外,通过EDI / SIMS,检查了小鼠大脑的六个不同区域(大脑皮层,call体,纹状体,长延髓,小脑皮层和小脑延髓)。尽管发现GC和ST富含白质,而PI却富含灰质。

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