Linking invasive motility to protein expression in single tumor cells.

Linking invasive motility to protein expression in single tumor cells.
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将侵袭性运动与单个肿瘤细胞中的蛋白质表达联系起来。

DOI:
10.1039/c7lc01008g
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发表时间:
2018-01-16
期刊:
影响因子:
6.1
通讯作者:
Kumar S
Kumar S
中科院分区:
工程技术1区
文献类型:
--
作者:
Lin JG;Kang CC;Zhou Y;Huang H;Herr AE;Kumar S

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恶性细胞侵入组织是癌症进展的关键步骤。虽然人们越来越认识到肿瘤内的细胞在侵袭潜力方面存在差异,但人们仍然几乎不知道这些差异与细胞间蛋白质表达的变化有何关系。在这里,我们介绍了一个微流体平台,它集成了单细胞侵袭性运动和蛋白质表达的测量,我们用它来检查人类胶质母细胞瘤肿瘤起始细胞(TIC)。我们的活细胞成像微装置由聚丙烯酰胺微通道组成,该微通道表现出组织样刚度,并沿每个通道呈现趋化因子梯度。由于运动性的内在差异,细胞亚群沿着通道轴分离。然后将分离的细胞原位裂解,并在周围的聚丙烯酰胺基质中对每个单细胞裂解物进行蛋白质印迹分析。我们观察到运动性与 Nestin 和 EphA2 表达之间的相关性。我们确定了单个 TIC 内的蛋白质-蛋白质相关性,而基于群体的检测可能会掩盖这种相关性。将运动性状与单细胞蛋白质分析(在同一细胞上)相结合,提供了一种识别侵入能力的可药物靶标的新方法。 SCAMPR 测定可识别侵袭性运动的预测蛋白质组标记。
The invasion of malignant cells into tissue is a critical step in the progression of cancer. While it is increasingly appreciated that cells within a tumor differ in their invasive potential, it remains nearly unknown how these differences relate to cell-to-cell variations in protein expression. Here, we introduce a microfluidic platform that integrates measurements of invasive motility and protein expression for single cells, which we use to scrutinize human glioblastoma tumor-initiating cells (TICs). Our live-cell imaging microdevice is comprised of polyacrylamide microchannels that exhibit tissue-like stiffness and present chemokine gradients along each channel. Due to intrinsic differences in motility, cell subpopulations separate along the channel axis. The separated cells are then lysed in-situ and each single-cell lysate is subjected to western blotting in the surrounding polyacrylamide matrix. We observe correlations between motility and Nestin and EphA2 expression. We identify protein-protein correlations within single TICs, which would be obscured with population-based assays. The integration of motility traits with single-cell protein analysis – on the same cell – offers a new means to identify druggable targets of invasive capacity. SCAMPR assay identifies predictive proteomic markers of invasive motility.
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发表时间: 2015-10
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