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Nowotarski HL, Attayek PJ, Allbritton NL. Automated platform for cell selection and separation based on four-dimensional motility and matrix degradation. Analyst 2020; 145:2731-2742. [PMID: 32083265 PMCID: PMC7716803 DOI: 10.1039/c9an02224d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Motility and invasion are key steps in the metastatic cascade, enabling cells to move through normal tissue borders into the surrounding stroma. Most available in vitro assays track cell motility or cell invasion but lack the ability to measure both simultaneously and then separate single cells with unique behaviors. In this work, we developed a cell-separation platform capable of tracking cell movement (chemokinesis) and invasion through an extracellular matrix in space and time. The platform utilized a collagen scaffold with embedded tumor cells overlaid onto a microraft array. Confocal microscopy enabled high resolution (0.4 × 0.4 × 3.5 µm voxel) monitoring of cell movement within the scaffolds. Two pancreatic cancer cell lines with known differing invasiveness were characterized on this platform, with median motilities of 14 ± 6 μm and 10 ± 4 μm over 48 h. Within the same cell line, cells demonstrated highly variable motility, with XYZ movement ranging from 144 μm to 2 μm over 24 h. The ten lowest and highest motility cells, with median movements of 33 ± 11 μm and 3 ± 1 μm, respectively, were separated and sub-cultured. After 6 weeks of culture, the cell populations were assayed on a Transwell invasion assay and 227 ± 56 cells were invasive in the high motility population while only 48 ± 10 cells were invasive in the low motility population, indicating that the resulting offspring possessed a motility phenotype reflective of the parental cells. This work demonstrates the feasibility of sorting single cells based on complex phenotypes along with the capability to further probe those cells and explore biological phenomena.
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Affiliation(s)
- Hannah L Nowotarski
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599, USA.
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Shen J, Cai C, Yu Z, Pang Y, Zhou Y, Qian L, Wei W, Huang Y. A microfluidic live cell assay to study anthrax toxin induced cell lethality assisted by conditioned medium. Sci Rep 2015; 5:8651. [PMID: 25731605 PMCID: PMC4346806 DOI: 10.1038/srep08651] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 01/29/2015] [Indexed: 01/13/2023] Open
Abstract
It is technically challenging to investigate the function of secreted protein in real time by supply of conditioned medium that contains secreted protein of interest. The internalization of anthrax toxin is facilitated by a secreted protein Dickkopf-1 (DKK1) and its receptor, and eventually leads to cell lethality. To monitor the dynamic interplay between these components in live cells, we use an integrated microfluidic device to perform the cell viability assays with real-time controlled culture microenvironment in parallel. Conditioned medium, which contains the secreted proteins from specific cell lines, can be continuously pumped towards the cells that exposed to toxin. The exogenous DKK1 secreted from distant cells is able to rescue the sensitivity to toxin for those DKK1-knocked-down cells. This high-throughput assay allows us to precisely quantify the dynamic interaction between key components that cause cell death, and provide independent evidence of the function of DKK1 in the complex process of anthrax toxin internalization.
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Affiliation(s)
- Jie Shen
- 1] Biodynamic Optical Imaging Center (BIOPIC), Peking University, Beijing, 100871, China [2] College of Engineering, Peking University, Beijing, 100871, China [3] School of Life Sciences, Peking University, Beijing, 100871, China
| | - Changzu Cai
- School of Life Sciences, Peking University, Beijing, 100871, China
| | - Zhilong Yu
- 1] Biodynamic Optical Imaging Center (BIOPIC), Peking University, Beijing, 100871, China [2] College of Engineering, Peking University, Beijing, 100871, China
| | - Yuhong Pang
- 1] Biodynamic Optical Imaging Center (BIOPIC), Peking University, Beijing, 100871, China [2] School of Life Sciences, Peking University, Beijing, 100871, China
| | - Ying Zhou
- 1] Biodynamic Optical Imaging Center (BIOPIC), Peking University, Beijing, 100871, China [2] College of Engineering, Peking University, Beijing, 100871, China
| | - Lili Qian
- School of Life Sciences, Peking University, Beijing, 100871, China
| | - Wensheng Wei
- School of Life Sciences, Peking University, Beijing, 100871, China
| | - Yanyi Huang
- 1] Biodynamic Optical Imaging Center (BIOPIC), Peking University, Beijing, 100871, China [2] College of Engineering, Peking University, Beijing, 100871, China
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Guan Z, Jia S, Zhu Z, Zhang M, Yang CJ. Facile and Rapid Generation of Large-Scale Microcollagen Gel Array for Long-Term Single-Cell 3D Culture and Cell Proliferation Heterogeneity Analysis. Anal Chem 2014; 86:2789-97. [DOI: 10.1021/ac500088m] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Zhichao Guan
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
| | - Shasha Jia
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
| | - Zhi Zhu
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
| | - Mingxia Zhang
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
| | - Chaoyong James Yang
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
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