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Integrated Microfluidic Device for Enrichment and Identification of Circulating Tumor Cells from the Blood of Patients with Colorectal Cancer. DISEASE MARKERS 2019; 2019:8945974. [PMID: 31354892 PMCID: PMC6636595 DOI: 10.1155/2019/8945974] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 04/08/2019] [Indexed: 01/02/2023]
Abstract
Integrated device with high purity for circulating tumor cell (CTC) identification has been regarded as a key goal to make CTC analysis a “bench-to-bedside” technology. Here, we have developed a novel integrated microfluidic device that can enrich and identify the CTCs from the blood of patients with colorectal cancer. To enrich CTCs from whole blood, microfabricated trapping chambers were included in the miniaturized device, allowing for the isolation of tumor cells based on differences in size and deformability between tumor and normal blood cells. Microvalves were also introduced sequentially in the device, enabling automatic CTC enrichment as well as immunostaining reagent delivery. Under optimized conditions, the whole blood spiked with caco-2 cells passing through the microfluidic device after leukocyte depletion and approximately 73% of caco-2 cells were identified by epithelial cell adhesion molecule (EpCAM) staining. In clinical samples, CTCs were detectable from all patients with advanced colorectal cancer within 3 h. In contrast, the number of CTCs captured on the device from the blood of healthy donors was significantly lower than that from the patients, suggesting the utilization of the integrated device for further molecular analyses of CTCs.
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Ni Y, Zhao Y, Chen Q, Yamaguchi Y, Dou X. Study of the peak broadening due to detection in the electrophoretic separation of DNA by CE and microchip CE and the application of image sensor for ultra-small detection cell length. J Sep Sci 2019; 42:2280-2288. [PMID: 31038284 DOI: 10.1002/jssc.201900051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 04/20/2019] [Accepted: 04/24/2019] [Indexed: 11/12/2022]
Abstract
Narrow peaks are important to high-resolution and high-speed separation of DNA fragments by capillary electrophoresis and microchip capillary electrophoresis. Detection cell length is one of the broadening factors, which is often ignored in experiments. However, is it always safe to neglect detection cell length under any condition? To answer this question, we investigated the influence of detection cell length by simulation and experiments. A parameter named as detection cell length ratio was proposed to directly compare the detection cell length and the spatial length of sample band. Electrophoretic peaks generated by various detection cell length ratios were analyzed. A simple rule to evaluate the peak broadening due to detection cell length was obtained. The current states of the detection cell length of detection system and their reliabilities in capillary electrophoresis and microchip capillary electrophoresis were analyzed. Microchip capillary electrophoresis detection with an ultra-small detection cell length of 0.36 μm was easily achieved by using an image sensor.
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Affiliation(s)
- Yi Ni
- Institute of Photonics and Bio-medicine, Graduate School of Science, East China University of Science and Technology, Shanghai, P. R. China
| | - Yubin Zhao
- Institute of Photonics and Bio-medicine, Graduate School of Science, East China University of Science and Technology, Shanghai, P. R. China
| | - Qinmiao Chen
- Institute of Photonics and Bio-medicine, Graduate School of Science, East China University of Science and Technology, Shanghai, P. R. China
| | - Yoshinori Yamaguchi
- Institute of Photonics and Bio-medicine, Graduate School of Science, East China University of Science and Technology, Shanghai, P. R. China.,Department of Applied Physics, Graduate School of Engineering, Osaka University, Yamadaoka, Suita-city, Osaka, Japan
| | - Xiaoming Dou
- Institute of Photonics and Bio-medicine, Graduate School of Science, East China University of Science and Technology, Shanghai, P. R. China.,Department of Applied Physics, Graduate School of Engineering, Osaka University, Yamadaoka, Suita-city, Osaka, Japan.,School of Optoelectronic Engineering, ChangZhou Institute of Technology, Changzhou, Jiangsu, P. R. China
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WANG XR, LI BW, YOU HY, CHEN LX. An Ion Imprinted Polymers Grafted Paper-based Fluorescent Sensor Based on Quantum Dots for Detection of Cu2+ Ions. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2015. [DOI: 10.1016/s1872-2040(15)60867-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Li B, Zhang W, Chen L, Lin B. A fast and low-cost spray method for prototyping and depositing surface-enhanced Raman scattering arrays on microfluidic paper based device. Electrophoresis 2013; 34:2162-8. [DOI: 10.1002/elps.201300138] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Revised: 04/15/2013] [Accepted: 04/22/2013] [Indexed: 11/12/2022]
Affiliation(s)
- Bowei Li
- Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation; Yantai Institute of Coastal Zone Research; Chinese Academy of Sciences; Yantai; P. R. China
| | | | - Lingxin Chen
- Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation; Yantai Institute of Coastal Zone Research; Chinese Academy of Sciences; Yantai; P. R. China
| | - Bingcheng Lin
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian; P. R. China
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Saito RM, Coltro WKT, de Jesus DP. Instrumentation design for hydrodynamic sample injection in microchip electrophoresis: a review. Electrophoresis 2012; 33:2614-23. [PMID: 22965705 DOI: 10.1002/elps.201200089] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Reproducible and representative sample injection in microchip electrophoresis has been a bottleneck for quantitative analytical applications. Electrokinetic sample injection is the most used because it is easy to perform. However, this injection method is usually affected by sample composition and the bias effect. On the other hand, these drawbacks are overcome by the hydrodynamic (HD) sample injection, although this injection mode requires HD flow control. This review gives an overview of the basic principles, the instrumentation designs, and the performance of HD sample injection systems for microchip electrophoresis.
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Affiliation(s)
- Renata M Saito
- Institute of Chemistry, State University of Campinas, Campinas, São Paulo, Brazil
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Experimental and numerical analysis of high-resolution injection technique for capillary electrophoresis microchip. Int J Mol Sci 2011; 12:3594-605. [PMID: 21747696 PMCID: PMC3131580 DOI: 10.3390/ijms12063594] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2011] [Revised: 05/11/2011] [Accepted: 05/25/2011] [Indexed: 12/15/2022] Open
Abstract
This study presents an experimental and numerical investigation on the use of high-resolution injection techniques to deliver sample plugs within a capillary electrophoresis (CE) microchip. The CE microfluidic device was integrated into a U-shaped injection system and an expansion chamber located at the inlet of the separation channel, which can miniize the sample leakage effect and deliver a high-quality sample plug into the separation channel so that the detection performance of the device is enhanced. The proposed 45° U-shaped injection system was investigated using a sample of Rhodamine B dye. Meanwhile, the analysis of the current CE microfluidic chip was studied by considering the separation of Hae III digested ϕx-174 DNA samples. The experimental and numerical results indicate that the included 45° U-shaped injector completely eliminates the sample leakage and an expansion separation channel with an expansion ratio of 2.5 delivers a sample plug with a perfect detection shape and highest concentration intensity, hence enabling an optimal injection and separation performance.
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FENG J, YANG XJ, LI XC, YANG H, CHEN ZG. An Automated Fluid-transport Device for a Microfluidic System. ANAL SCI 2011; 27:1057-60. [DOI: 10.2116/analsci.27.1057] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Jun FENG
- School of Pharmaceutical Sciences, Sun Yat-sen University
| | - Xiu-Juan YANG
- School of Pharmaceutical Sciences, Sun Yat-sen University
| | - Xin-Chun LI
- School of Pharmaceutical Sciences, Sun Yat-sen University
| | - Hui YANG
- School of Pharmaceutical Sciences, Sun Yat-sen University
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