Visualising Cholesterol in Brain by On-Tissue Derivatisation and Quantitative Mass Spectrometry Imaging

Visualising Cholesterol in Brain by On-Tissue Derivatisation and Quantitative Mass Spectrometry Imaging
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通过组织衍生化和定量质谱成像可视化大脑中的胆固醇

DOI:
10.1101/2020.11.06.369447
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发表时间:
2020
期刊:
--
影响因子:
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通讯作者:
Angelini R
Angelini R
中科院分区:
--
文献类型:
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作者:
Angelini R

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尽管胆固醇是大脑中的关键分子,但与其他脂质相比,胆固醇的质谱成像(MSI)报告不足,因为难以电离甾醇分子。在目前的工作中,我们采用了组织上酶辅助衍生化策略,以提高脑组织切片中胆固醇的检测。我们报告的分布和水平的胆固醇跨特定结构的小鼠大脑,在模型的尼曼-匹克C1型疾病,并在大脑发育。MSI揭示了在成年小鼠中,胆固醇在脑桥和髓质中最高,以及其分布在发育过程中的变化。Npc 1基因敲除小鼠胼胝体和其他脑区的胆固醇显著降低,证实了分子水平上的髓鞘形成不足。我们的研究表明MSI在神经科学中对甾醇的研究具有潜力。
Despite being a critical molecule in the brain, mass spectrometry imaging (MSI) of cholesterol has been under-reported compared to other lipids due to the difficulty in ionizing the sterol molecule. In the present work, we have employed an on-tissue enzyme-assisted derivatization strategy to improve detection of cholesterol in brain tissue sections. We report distribution and levels of cholesterol across specific structures of the mouse brain, in a model of Niemann-Pick type C1 disease, and during brain development. MSI revealed that in the adult mouse, cholesterol is the highest in the pons and medulla and how its distribution changes during development. Cholesterol was significantly reduced in the corpus callosum and other brain regions in theNpc1null mouse, confirming hypomyelination at the molecular level. Our study demonstrates the potential of MSI to the study of sterols in neuroscience.
通过质谱法对组织中脂质生物化学的MALDI成像。
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