组织中空间分辨的 3D 代谢组学分析。
Spatially resolved 3D metabolomic profiling in tissues.
机构信息
Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA 30332, USA.
Electrical and Computer Engineering Department, Georgia Institute of Technology, Atlanta, GA 30332, USA.
出版信息
Sci Adv. 2021 Jan 27;7(5). doi: 10.1126/sciadv.abd0957. Print 2021 Jan.
Spatially resolved RNA and protein molecular analyses have revealed unexpected heterogeneity of cells. Metabolic analysis of individual cells complements these single-cell studies. Here, we present a three-dimensional spatially resolved metabolomic profiling framework (3D-SMF) to map out the spatial organization of metabolic fragments and protein signatures in immune cells of human tonsils. In this method, 3D metabolic profiles were acquired by time-of-flight secondary ion mass spectrometry to profile up to 189 compounds. Ion beams were used to measure sub-5-nanometer layers of tissue across 150 sections of a tonsil. To incorporate cell specificity, tonsil tissues were labeled by an isotope-tagged antibody library. To explore relations of metabolic and cellular features, we carried out data reduction, 3D spatial correlations and classifications, unsupervised K-means clustering, and network analyses. Immune cells exhibited spatially distinct lipidomic fragment distributions in lymphatic tissue. The 3D-SMF pipeline affects studying the immune cells in health and disease.
空间分辨 RNA 和蛋白质分子分析揭示了细胞的意外异质性。单细胞代谢分析补充了这些单细胞研究。在这里,我们提出了一种三维空间分辨代谢组学分析框架(3D-SMF),以描绘人扁桃体免疫细胞中代谢片段和蛋白质特征的空间组织。在该方法中,通过飞行时间二次离子质谱法获得三维代谢谱,以分析多达 189 种化合物。离子束用于测量扁桃体 150 个切片中 5 纳米以下的组织层。为了纳入细胞特异性,扁桃体组织通过同位素标记的抗体文库进行标记。为了探索代谢和细胞特征之间的关系,我们进行了数据缩减、3D 空间相关性和分类、无监督 K-均值聚类以及网络分析。免疫细胞在淋巴组织中表现出空间上不同的脂质片段分布。3D-SMF 管道影响对健康和疾病中的免疫细胞进行研究。
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