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Shi L, Liu S, Li X, Huang X, Luo H, Bai Q, Li Z, Wang L, Du X, Jiang C, Liu S, Li C. Droplet microarray platforms for high-throughput drug screening. Mikrochim Acta 2023; 190:260. [PMID: 37318602 DOI: 10.1007/s00604-023-05833-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Accepted: 05/15/2023] [Indexed: 06/16/2023]
Abstract
High-throughput screening platforms are fundamental for the rapid and efficient processing of large amounts of experimental data. Parallelization and miniaturization of experiments are important for improving their cost-effectiveness. The development of miniaturized high-throughput screening platforms is essential in the fields of biotechnology, medicine, and pharmacology. Currently, most laboratories use 96- or 384-well microtiter plates for screening; however, they have disadvantages, such as high reagent and cell consumption, low throughput, and inability to avoid cross-contamination, which need to be further optimized. Droplet microarrays, as novel screening platforms, can effectively avoid these shortcomings. Here, the preparation method of the droplet microarray, method of adding compounds in parallel, and means to read the results are briefly described. Next, the latest research on droplet microarray platforms in biomedicine is presented, including their application in high-throughput culture, cell screening, high-throughput nucleic acid screening, drug development, and individualized medicine. Finally, the challenges and future trends in droplet microarray technology are summarized.
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Affiliation(s)
- Lina Shi
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Sutong Liu
- Juxing College of Digital Economics, Haikou University of Economics, Haikou, 570100, China
| | - Xue Li
- Sichuan Hanyuan County People's Hospital, Hanyuan, 625300, China
| | - Xiwei Huang
- Ministry of Education Key Lab of RFCircuits and Systems, Hangzhou Dianzi University, Hangzhou, 310038, China
| | - Hongzhi Luo
- Department of Laboratory Medicine, The Third Affiliated Hospital of Zunyi Medical University (The First People's Hospital of Zunyi), Zunyi, 563002, China
| | - Qianwen Bai
- Department of Laboratory Medicine, The Third Affiliated Hospital of Zunyi Medical University (The First People's Hospital of Zunyi), Zunyi, 563002, China
| | - Zhu Li
- College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China
| | - Lijun Wang
- Department of Ophthalmology, The Third People's Hospital of Chengdu, The Affiliated Hospital of Southwest Jiaotong University, Chengdu, 610031, China
| | - Xiaoxin Du
- Office of Scientific Research & Development, University of Electronic Science and Technology, Chengdu, 610054, China
| | - Cheng Jiang
- Biomedical Engineering, School of Medicine, The Chinese University of Hong Kong, Shenzhen, 518172, China
| | - Shan Liu
- Sichuan Provincial Key Laboratory for Human Disease Gene Study, Department of Medical Genetics, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610072, China.
| | - Chenzhong Li
- Biomedical Engineering, School of Medicine, The Chinese University of Hong Kong, Shenzhen, 518172, China
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Supramaniam P, Wang Z, Chatzimichail S, Parperis C, Kumar A, Ho V, Ces O, Salehi-Reyhani A. Measuring Encapsulation Efficiency in Cell-Mimicking Giant Unilamellar Vesicles. ACS Synth Biol 2023; 12:1227-1238. [PMID: 36977193 PMCID: PMC10127275 DOI: 10.1021/acssynbio.2c00684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Abstract
One of the main drivers within the field of bottom-up synthetic biology is to develop artificial chemical machines, perhaps even living systems, that have programmable functionality. Numerous toolkits exist to generate giant unilamellar vesicle-based artificial cells. However, methods able to quantitatively measure their molecular constituents upon formation is an underdeveloped area. We report an artificial cell quality control (AC/QC) protocol using a microfluidic-based single-molecule approach, enabling the absolute quantification of encapsulated biomolecules. While the measured average encapsulation efficiency was 11.4 ± 6.8%, the AC/QC method allowed us to determine encapsulation efficiencies per vesicle, which varied significantly from 2.4 to 41%. We show that it is possible to achieve a desired concentration of biomolecule within each vesicle by commensurate compensation of its concentration in the seed emulsion. However, the variability in encapsulation efficiency suggests caution is necessary when using such vesicles as simplified biological models or standards.
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Affiliation(s)
| | - Zibo Wang
- Department of Surgery & Cancer, Imperial College London, London W12 0HS, U.K
- Department of Chemistry, King's College London, London SE1 1DB, U.K
| | | | - Christopher Parperis
- Department of Chemistry, Imperial College London, London W12 0BZ, U.K
- Department of Chemistry, King's College London, London SE1 1DB, U.K
| | - Aditi Kumar
- Department of Chemistry, Imperial College London, London W12 0BZ, U.K
| | - Vanessa Ho
- Department of Chemistry, Imperial College London, London W12 0BZ, U.K
| | - Oscar Ces
- Department of Chemistry, Imperial College London, London W12 0BZ, U.K
- fabriCELL, Imperial College London, London SW7 2AZ, U.K
| | - Ali Salehi-Reyhani
- Department of Surgery & Cancer, Imperial College London, London W12 0HS, U.K
- fabriCELL, Imperial College London, London SW7 2AZ, U.K
- Institute for Molecular Science and Engineering, Imperial College London, London SW7 2AZ, U.K
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Yu Z, Jin J, Shui L, Chen H, Zhu Y. Recent advances in microdroplet techniques for single-cell protein analysis. Trends Analyt Chem 2021. [DOI: 10.1016/j.trac.2021.116411] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Thakur S, Dasmahapatra AK, Bandyopadhyay D. Functional liquid droplets for analyte sensing and energy harvesting. Adv Colloid Interface Sci 2021; 294:102453. [PMID: 34120038 DOI: 10.1016/j.cis.2021.102453] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 05/25/2021] [Accepted: 05/25/2021] [Indexed: 02/06/2023]
Abstract
Over the past century, rapid miniaturization of technologies has helped in the development of efficient, flexible, portable, robust, and compact applications with minimal wastage of materials. In this direction, of late, the usage of mesoscale liquid droplets has emerged as an alternative platform because of the following advantages: (i) a droplet is incompressible and at the same time deformable, (ii) interfacial area of a spherical droplet is minimum for a given amount of mass; and (iii) a droplet interface allows facile mass, momentum, and energy transfer. Subsequently, such attributes have aided towards the design of diverse droplet-based microfluidic technologies. For example, the microdroplets have been utilized as micro-reactors, colorimetric or electrochemical (EC) sensors, drug-delivery vehicles, and energy harvesters. Further, a number of recently reported lab-on-a-chip technologies exploit the motility, storage, and mixing capacities of the microdroplets. In view of this background, the review initiates discussion by highlighting the different attributes of the microdroplets such as size, shape, surface to volume ratio, wettability, and contact line. Thereafter, the effects of the surface or body forces on the properties of the droplets have been elaborated. Finally, the different aspects of such liquid droplet systems towards technological adaptations in health care, sensing, and energy harvesting have been presented. The review concludes with a tight summary on the potential avenues for further developments.
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Affiliation(s)
- Siddharth Thakur
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Assam 781039, India
| | - Ashok Kumar Dasmahapatra
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Assam 781039, India; Centre for Nanotechnology, Indian Institute of Technology Guwahati, Assam 781039, India
| | - Dipankar Bandyopadhyay
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Assam 781039, India; Centre for Nanotechnology, Indian Institute of Technology Guwahati, Assam 781039, India.
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Shi Y, Cai Y, Cao Y, Hong Z, Chai Y. Recent advances in microfluidic technology and applications for anti-cancer drug screening. Trends Analyt Chem 2021. [DOI: 10.1016/j.trac.2020.116118] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Chatzimichail S, Supramaniam P, Ces O, Salehi-Reyhani A. Counting Proteins in Single Cells with Addressable Droplet Microarrays. J Vis Exp 2018. [PMID: 30035757 DOI: 10.3791/56110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Often cellular behavior and cellular responses are analyzed at the population level where the responses of many cells are pooled together as an average result masking the rich single cell behavior within a complex population. Single cell protein detection and quantification technologies have made a remarkable impact in recent years. Here we describe a practical and flexible single cell analysis platform based on addressable droplet microarrays. This study describes how the absolute copy numbers of target proteins may be measured with single cell resolution. The tumor suppressor p53 is the most commonly mutated gene in human cancer, with more than 50% of total cancer cases exhibiting a non-healthy p53 expression pattern. The protocol describes steps to create 10 nL droplets within which single human cancer cells are isolated and the copy number of p53 protein is measured with single molecule resolution to precisely determine the variability in expression. The method may be applied to any cell type including primary material to determine the absolute copy number of any target proteins of interest.
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Affiliation(s)
| | | | - Oscar Ces
- Institute of Chemical Biology, Department of Chemistry, Imperial College London
| | - Ali Salehi-Reyhani
- Institute of Chemical Biology, Department of Chemistry, Imperial College London;
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Salehi-Reyhani A. Evaluating single molecule detection methods for microarrays with high dynamic range for quantitative single cell analysis. Sci Rep 2017; 7:17957. [PMID: 29263350 PMCID: PMC5738400 DOI: 10.1038/s41598-017-18303-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 12/07/2017] [Indexed: 11/09/2022] Open
Abstract
Single molecule microarrays have been used in quantitative proteomics, in particular, single cell analysis requiring high sensitivity and ultra-low limits of detection. In this paper, several image analysis methods are evaluated for their ability to accurately enumerate single molecules bound to a microarray spot. Crucially, protein abundance in single cells can vary significantly and may span several orders of magnitude. This poses a challenge to single molecule image analysis. In order to quantitatively assess the performance of each method, synthetic image datasets are generated with known ground truth whereby the number of single molecules varies over 5 orders of magnitude with a range of signal to noise ratios. Experiments were performed on synthetic datasets whereby the number of single molecules per spot corresponds to realistic single cell distributions whose ground truth summary statistics are known. The methods of image analysis are assessed in their ability to accurately estimate the distribution parameters. It is shown that super-resolution image analysis methods can significantly improve counting accuracy and better cope with single molecule congestion. The results highlight the challenge posed by quantitative single cell analysis and the implications to performing such analyses using microarray based approaches are discussed.
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Affiliation(s)
- Ali Salehi-Reyhani
- Department Chemistry, Institute of Chemical Biology, Imperial College London, London, SW7 2AZ, UK.
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Garcia-Cordero JL, Fan ZH. Sessile droplets for chemical and biological assays. LAB ON A CHIP 2017; 17:2150-2166. [PMID: 28561839 DOI: 10.1039/c7lc00366h] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Sessile droplets are non-movable droplets spanning volumes in the nL-to-μL range. The sessile-droplet-based platform provides a paradigm shift from the conventional, flow-based lab-on-a-chip philosophy, yet offering similar benefits: low reagent/sample consumption, high throughput, automation, and most importantly flexibility and versatility. Moreover, the platform relies less heavily on sophisticated fabrication techniques, often sufficient with a hydrophobic substrate, and no pump is required for operation. In addition, exploiting the physical phenomena that naturally arise when a droplet evaporates, such as the coffee-ring effect or Marangoni flow, can lead to fascinating applications. In this review, we introduce the physics of droplets, and then focus on the different types of chemical and biological assays that have been implemented in sessile droplets, including analyte concentration, particle separation and sorting, cell-based assays, and nucleic acid amplification. Finally, we provide our perspectives on this unique micro-scale platform.
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Affiliation(s)
- Jose L Garcia-Cordero
- Unidad Monterrey, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (Cinvestav-IPN), Via del Conocimiento 201, Parque PIIT, Apodaca, NL, CP. 66628 Mexico.
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Magness AJ, Squires JA, Griffiths B, Khan K, Swain A, Willison KR, Cunningham D, Gerlinger M, Klug DR. Multiplexed single cell protein expression analysis in solid tumours using a miniaturised microfluidic assay. CONVERGENT SCIENCE PHYSICAL ONCOLOGY 2017. [DOI: 10.1088/2057-1739/aa6aae] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Berthuy OI, Muldur SK, Rossi F, Colpo P, Blum LJ, Marquette CA. Multiplex cell microarrays for high-throughput screening. LAB ON A CHIP 2016; 16:4248-4262. [PMID: 27731880 DOI: 10.1039/c6lc00831c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Microarray technology was developed in the early 1990s to measure the transcription levels of thousands of genes in parallel. The basic premise of high-density arraying has since been expanded to create cell microarrays. Cells on chip are powerful experimental tools for high-throughput and multiplex screening of samples or cellular functions. Miniaturization increases assay throughput while reducing both reagent consumption and cell population heterogeneity effect, making these systems attractive for a wide range of assays, from drug discovery to toxicology, stem cell research and therapy. It is usual to functionalize the surface of a substrate to design cell microarrays. One form of cell microarrays, the transfected cell microarray, wherein plasmid DNA or siRNA spotted on the surface of a substrate is reverse-transfected locally into adherent cells, has become a standard tool for parallel cell-based analysis. With the advent of technology, cells can also be directly spotted onto functionalized surfaces using robotic fluid-dispensing devices or printed directly on bio-ink material. We are providing herein an overview of the latest developments in optical cell microarrays allowing high-throughput and high-content analysis.
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Affiliation(s)
- Ophélie I Berthuy
- Univ Lyon, Université Lyon1, CNRS, INSA, CPE-Lyon, ICBMS, UMR 5246, 43, Bd du 11 novembre 1918, 69622 Villeurbanne cedex, France.
| | - Sinan K Muldur
- Européen Commission, Joint Research Centre, Institute for Heath and Consumer Protection, Ispra, VA, Italy
| | - François Rossi
- Européen Commission, Joint Research Centre, Institute for Heath and Consumer Protection, Ispra, VA, Italy
| | - Pascal Colpo
- Européen Commission, Joint Research Centre, Institute for Heath and Consumer Protection, Ispra, VA, Italy
| | - Loïc J Blum
- Univ Lyon, Université Lyon1, CNRS, INSA, CPE-Lyon, ICBMS, UMR 5246, 43, Bd du 11 novembre 1918, 69622 Villeurbanne cedex, France.
| | - Christophe A Marquette
- Univ Lyon, Université Lyon1, CNRS, INSA, CPE-Lyon, ICBMS, UMR 5246, 43, Bd du 11 novembre 1918, 69622 Villeurbanne cedex, France.
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Affiliation(s)
- Stephanie M. Schubert
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
| | - Stephanie R. Walter
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
| | - Mael Manesse
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
| | - David R. Walt
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
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12
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Cells on chip for multiplex screening. Biosens Bioelectron 2016; 76:29-37. [DOI: 10.1016/j.bios.2015.04.024] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 04/08/2015] [Accepted: 04/10/2015] [Indexed: 01/18/2023]
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Digital Microfluidics for Manipulation and Analysis of a Single Cell. Int J Mol Sci 2015; 16:22319-32. [PMID: 26389890 PMCID: PMC4613310 DOI: 10.3390/ijms160922319] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Revised: 08/12/2015] [Accepted: 08/18/2015] [Indexed: 12/31/2022] Open
Abstract
The basic structural and functional unit of a living organism is a single cell. To understand the variability and to improve the biomedical requirement of a single cell, its analysis has become a key technique in biological and biomedical research. With a physical boundary of microchannels and microstructures, single cells are efficiently captured and analyzed, whereas electric forces sort and position single cells. Various microfluidic techniques have been exploited to manipulate single cells through hydrodynamic and electric forces. Digital microfluidics (DMF), the manipulation of individual droplets holding minute reagents and cells of interest by electric forces, has received more attention recently. Because of ease of fabrication, compactness and prospective automation, DMF has become a powerful approach for biological application. We review recent developments of various microfluidic chips for analysis of a single cell and for efficient genetic screening. In addition, perspectives to develop analysis of single cells based on DMF and emerging functionality with high throughput are discussed.
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