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通过共聚焦拉曼显微镜确定细胞和组织中维生素E、肺表面活性物质和膜脂的空间分布。

Identifying the spatial distribution of vitamin E, pulmonary surfactant and membrane lipids in cells and tissue by confocal Raman microscopy.

作者信息

Beattie J Renwick, Schock Bettina C

机构信息

School of Medicine, Dentistry and Biomedical Sciences, Queen's University, Belfast, UK.

出版信息

Methods Mol Biol. 2009;579:513-35. doi: 10.1007/978-1-60761-322-0_26.

Abstract

Every organ compromises of several different cell types. When studying the effects of a chosen compound within this organ or tissue uptake, localisation, metabolism, and the effect itself can be expected to differ between cells. Using the example of Vitamin E in pulmonary tissue we introduce confocal Raman Microscopy as a superior method to localise lipid-soluble compounds within tissues and cells. We describe the analyses of vitamin E, its oxidation products, and metabolites as well as pulmonary surfactant phospholipids in fixed lung tissue sections. Examples of main structural membrane lipids (PC, cholesterol) and an example of a lipid-signalling molecule (ceramide) are also included. Confocal Raman microscopy is a non-destructive optical method of analysing chemical and physical composition of solids, liquids, gases, gels, and solutions. The method is rich in information allowing discrimination of chemically similar molecules (including geometric isomers) and sensitive monitoring of subtle physical interactions. Additionally, Raman spectroscopy is relatively insensitive to water allowing the analysis of aqueous solutions and suspensions typical in biochemistry. In contrast, Raman spectroscopy is sensitive to non-polar molecules making it ideal for lipidomics research.

摘要

每个器官都由几种不同的细胞类型组成。在研究特定化合物在该器官内的作用或组织摄取、定位、代谢时,可以预期细胞之间的作用本身会有所不同。以肺组织中的维生素E为例,我们介绍共聚焦拉曼显微镜作为一种在组织和细胞内定位脂溶性化合物的优越方法。我们描述了在固定肺组织切片中对维生素E、其氧化产物、代谢物以及肺表面活性物质磷脂的分析。还包括主要结构膜脂(磷脂酰胆碱、胆固醇)的示例以及一种脂质信号分子(神经酰胺)的示例。共聚焦拉曼显微镜是一种分析固体、液体、气体、凝胶和溶液的化学和物理组成的非破坏性光学方法。该方法信息丰富,能够区分化学性质相似的分子(包括几何异构体),并能灵敏地监测细微的物理相互作用。此外,拉曼光谱对水相对不敏感,这使得它能够分析生物化学中典型的水溶液和悬浮液。相比之下,拉曼光谱对非极性分子敏感,这使其成为脂质组学研究的理想选择。

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