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Separation-encoded microparticles for single-cell western blotting.
Lab on a Chip ( IF 6.1 ) Pub Date : 2019-11-15 , DOI: 10.1039/c9lc00917e
Burcu Gumuscu 1 , Amy E Herr 1
Affiliation  

Direct measurement of proteins from single cells has been realized at the microscale using microfluidic channels, capillaries, and semi-enclosed microwell arrays. Although powerful, these formats are constrained, with the enclosed geometries proving cumbersome for multistage assays, including electrophoresis followed by immunoprobing. We introduce a hybrid microfluidic format that toggles between a planar microwell array and a suspension of microparticles. The planar array is stippled in a thin sheet of polyacrylamide gel, for efficient single-cell isolation and protein electrophoresis of hundreds-to-thousands of cells. Upon mechanical release, array elements become a suspension of separation-encoded microparticles for more efficient immunoprobing due to enhanced mass transfer. Dehydrating microparticles offer improved analytical sensitivity owing to in-gel concentration of fluorescence signal for high-throughput single-cell targeted proteomics.

中文翻译:

用于单细胞蛋白质印迹的分离编码微粒。

使用微流体通道、毛细管和半封闭微孔阵列已经在微观尺度上实现了对单细胞蛋白质的直接测量。虽然功能强大,但这些格式受到限制,封闭的几何形状对于多阶段测定(包括电泳和随后的免疫探测)来说很麻烦。我们引入了一种混合微流体格式,可以在平面微孔阵列和微粒悬浮液之间切换。平面阵列点在薄薄的聚丙烯酰胺凝胶上,用于高效的单细胞分离和数百至数千个细胞的蛋白质电泳。机械释放后,阵列元件变成分离编码微粒的悬浮液,由于增强的传质而实现更有效的免疫探测。由于凝胶内荧光信号浓度较高,脱水微粒可提高分析灵敏度,从而实现高通量单细胞靶向蛋白质组学。
更新日期:2019-11-15
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