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An Expandable Mechanopharmaceutical Device (3): a Versatile Raman Spectral Cytometry Approach to Study the Drug Cargo Capacity of Individual Macrophages

机译:可扩展的机械手法装置(3):一种多功能拉曼光谱细胞测定方法,用于研究单个巨噬细胞的药物货物能力

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PurposeTo improve cytometric phenotyping abilities and better understand cell populations with high interindividual variability, a novel Raman-based microanalysis was developed to characterize macrophages on the basis of chemical composition, specifically to measure and characterize intracellular drug distribution and phase separation in relation to endogenous cellular biomolecules.MethodsThe microanalysis was developed for the commercially-available WiTec alpha300R confocal Raman microscope. Alveolar macrophages were isolated and incubated in the presence of pharmaceutical compounds nilotinib, chloroquine, or etravirine. A Raman data processing algorithm was specifically developed to acquire the Raman signals emitted from single-cells and calculate the signal contributions from each of the major molecular components present in cell samples.ResultsOur methodology enabled analysis of the most abundant biochemicals present in typical eukaryotic cells and clearly identified foamy lipid-laden macrophages throughout cell populations, indicating feasibility for cellular lipid content analysis in the context of different diseases. Single-cell imaging revealed differences in intracellular distribution behavior for each drug; nilotinib underwent phase separation and self-aggregation while chloroquine and etravirine accumulated primarily via lipid partitioning.ConclusionsThis methodology establishes a versatile cytometric analysis of drug cargo loading in macrophages requiring small numbers of cells with foreseeable applications in toxicology, disease pathology, and drug discovery.
机译:puposeto提高细胞术表型能力和更好地了解细胞群,具有高的间面变异性,开发了一种新的拉曼微基分析,以在化学成分的基础上表征巨噬细胞,特别是测量和表征内源细胞生物分子的细胞内药物分布和相分离.Methodsthe微扫描是为商业上可用的Witecα300R共焦拉曼显微镜开发的。分离肺泡巨噬细胞并在药物化合物尼洛替尼,氯喹或埃拉维尼存在下培养。专门开发了一种拉曼数据处理算法以获取从单细胞发出的拉曼信号,并计算细胞样本中存在的每个主要分子组分的信号贡献。结果方法能够分析典型的真核细胞中存在的最丰富的生物化学术。在不同疾病的背景下,清楚地鉴定了整个细胞群的泡沫脂质 - 饲养巨噬细胞,表明细胞脂质含量分析的可行性。单细胞成像显示每个药物的细胞内分布行为的差异; Nilotinib接受了相分离和自我聚集,而氯喹和乙其主要通过脂质分配累积。结论,可以在需要少量细胞的巨噬细胞中进行多功能细胞术分析,需要少量细胞,可用于毒理学,疾病病理和药物发现。

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