Interfacing droplet microfluidics with antibody barcodes for multiplexed single-cell protein secretion profiling

作者：Tahereh Khajvand, Peifeng Huang, Linmei Li, Mingxia Zhang, Fengjiao Zhu, Xing Xu, Mengjiao Huang, Chaoyong Yang, Yao Lu, Zhi Zhu · 发表于：Lab on a Chip · 年份：2021 · DOI：10.1039/d1lc00567g · 被引用次数：27 · 研究领域：Innovative Microfluidic and Catalytic Techniques Innovation、Single-cell and spatial transcriptomics、Advanced Biosensing Techniques and Applications

To overcome these drawbacks, we present an integrated droplet microfluidic device that interfaces with spatially patterned antibody barcodes for multiplexed single-cell secretome analysis. The trapping array of 100 picoliter-sized isolation chambers could achieve >80% single-cell capture efficiency with >90% viability. The single-cell analysis microchip was validated by the detection of four-plexed cytokines, including IL-8, MCP-1, MIP-1b, and TNF-a/IL-10, from unstimulated and lipopolysaccharide (LPS)-stimulated individual human macrophages. We also successfully applied the platform to profile protein secretions of human tumor cell lines and primary/metastatic cancer cells dissociated from cancer patients to observe the secretion heterogeneity among cells. This unique microfluidic platform enables multiplexed secretion assays for static droplet microfluidics, provides a reliable and straightforward workflow for protein secretion assays based on a low number of single cells in a short incubation time (∼4 h), and could have widespread applications for studying secretion-mediated cellular heterogeneity.