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Xu Y, Wu KC, Jiang W, Hou Y, Cheow LF, Lee VHF, Chen CH. Single-Cell Secretion Analysis via Microfluidic Cell Membrane Immunosorbent Assay for Immune Profiling. Anal Chem 2024; 96:49-58. [PMID: 38109488 DOI: 10.1021/acs.analchem.3c02562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
Single-cell multiplexed phenotypic analysis expands the biomarkers for diagnosis, heralding a new era of precision medicine. Cell secretions are the primary measures of immune function, but single-cell screening remains challenging. Here, a novel cell membrane-based assay was developed using cholesterol-linked antibodies (CLAbs), integrating immunosorbent assays and droplet microfluidics to develop a flexible high-throughput single-cell secretion assay for multiplexed phenotyping. CLAb-grafted single cells were encapsulated in water-in-oil droplets to capture their own secretions. Subsequently, the cells were extracted from droplets for fluorescence labeling and screening. Multiple secretions and surface proteins were simultaneously measured from single cells by flow cytometry. To validate the approach, THP-1 cells, THP-1-derived M1 macrophages, and dendritic cells were assayed, indicating the differentiation efficiency of THP-1 cells under different chemical stimulations. Moreover, peripheral blood mononuclear cells from healthy donors under various stimuli showed varied active immune cell populations (6.62-47.14%). The peripheral blood mononuclear cells (PBMCs) of nasopharyngeal carcinoma patients were analyzed to identify a higher percentage of actively cytokine-secreted single cells in the basal state (2.82 ± 1.48%), compared with that in the health donors (0.70 ± 0.29%).
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Affiliation(s)
- Ying Xu
- Department of Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong SAR 999077, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen Virtual University Park, Shenzhen 518057, China
| | - Ka-Chun Wu
- Department of Clinical Oncology, Queen Mary Hospital, The University of Hong Kong, Pokfulam Road, Hong Kong SAR 999077, China
- Laboratory for Synthetic Chemistry and Chemical Biology, Hong Kong Science and Technology Park, Hong Kong SAR 999077, China
| | - Wenxin Jiang
- Department of Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong SAR 999077, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen Virtual University Park, Shenzhen 518057, China
| | - Yi Hou
- Department of Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong SAR 999077, China
| | - Lih Feng Cheow
- Department of Biomedical Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117583, Singapore
| | - Victor Ho-Fun Lee
- Department of Clinical Oncology, Queen Mary Hospital, The University of Hong Kong, Pokfulam Road, Hong Kong SAR 999077, China
| | - Chia-Hung Chen
- Department of Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong SAR 999077, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen Virtual University Park, Shenzhen 518057, China
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2
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Sun G, Wu Y, Huang Z, Liu Y, Li J, Du G, Lv X, Liu L. Directed evolution of diacetylchitobiose deacetylase via high-throughput droplet sorting with a novel, bacteria-based biosensor. Biosens Bioelectron 2023; 219:114818. [PMID: 36327560 DOI: 10.1016/j.bios.2022.114818] [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: 08/23/2022] [Revised: 10/02/2022] [Accepted: 10/12/2022] [Indexed: 11/19/2022]
Abstract
Numerous biological disciplines rely on high-throughput cell sorting. Flow cytometry, the current gold standard, is capable of ultrahigh-throughput cell sorting, but measurements are primarily limited to cell size and surface marker. Droplet sorting technology is gaining increasing attention with the ability to provide an individual environment for the analysis of single-cell secretion. Although various droplet detecting methods, such as fluorescence, absorbance, mass spectrum, imaging analysis, have been developed for droplet sorting, it remains challenging to establish high-throughput sorting methods for numerous analytes. We aim to develop a high-throughput sorting system based on the glucosamine (GlcN) measurement for the directed evolution of diacetylchitobiose deacetylase (Dac), the key enzyme for GlcN production. To overcome the limitation that no high-throughput sorting system existed for GlcN, we designed a novel bacteria-based biosensor capable of converting GlcN to a positively correlated fluorescence signal. Through characterization and optimization, it was possible to detect GlcN in droplets for high-throughput droplet sorting. We recovered the best Dac mutant S60I/R157T/F168S after sorting ∼0.2 million Dac mutants; its activity was 48.6 ± 1.5 U/mL, which was 1.8-times that of our previously discovered Dac mutant R157T (27.2 ± 1.8 U/mL). This result successfully demonstrated the combination of high-throughput droplet sorting technology and a bacteria-based biosensor, which could facilitate the industrial production of GlcN and serve as a model for similar droplet sorting applications.
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Affiliation(s)
- Guoyun Sun
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi, 214122, China; Science Center for Future Foods, Jiangnan University, Wuxi, 214122, China
| | - Yaokang Wu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi, 214122, China; Science Center for Future Foods, Jiangnan University, Wuxi, 214122, China
| | - Ziyang Huang
- Science Center for Future Foods, Jiangnan University, Wuxi, 214122, China
| | - Yanfeng Liu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi, 214122, China; Science Center for Future Foods, Jiangnan University, Wuxi, 214122, China
| | - Jianghua Li
- Science Center for Future Foods, Jiangnan University, Wuxi, 214122, China
| | - Guocheng Du
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi, 214122, China; Science Center for Future Foods, Jiangnan University, Wuxi, 214122, China
| | - Xueqin Lv
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi, 214122, China; Science Center for Future Foods, Jiangnan University, Wuxi, 214122, China
| | - Long Liu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi, 214122, China; Science Center for Future Foods, Jiangnan University, Wuxi, 214122, China.
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3
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A Two-Step Cross-Linked Hydrogel Immobilization Strategy for Diacetylchitobiose Deacetylase. Catalysts 2022. [DOI: 10.3390/catal12090932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Free enzymes often face economic problems due to their non-recyclability, which limits their applications for industrial manufacturing. Organic biopolymers are frequently used to fabricate hydrogel for enzyme immobilization due to their advantages of non-toxicity, biocompatibility, biodegradability, and flexibility. However, for highly thermostable enzymes, simple cross-linking causes either low immobilizing efficiency or low thermal stability. Herein, we developed a novel enzyme immobilization strategy with two-step cross-linked gelatin hydrogel for thermostable enzymes working at high temperature. The hydrogel was firstly “soft cross-linked” to immobilize most enzyme molecules and then “hard cross-linked” to gain strong thermal stability. We selected the enzyme diacetylchitobiose deacetylase (Dac), which was firstly derived from hyperthermophilic bacteria, to demonstrate the advantages of our method. With the optimized fabrication steps, our hydrogel showed ~87% Dac immobilization efficiency and excellent stability against heating, dehydrating, long-time storing, and massive recycling. Importantly, our hydrogel showed ~85.0% relative enzyme activity at 80 °C and retained ~65.8% activity after 10 rounds of catalysis. This strategy showed high immobilizing efficiency and strong thermal stability and we believe it could improve the industrial potential for those enzymes.
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Zhu J, Chen L. Highly efficient incorporation of dATP in terminal transferase polymerization forming the ploy (A)n-DITO-1 fluorescent probe sensing terminal transferase and T4 polynucleotide kinase activity. Anal Chim Acta 2022; 1221:340080. [DOI: 10.1016/j.aca.2022.340080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 05/23/2022] [Accepted: 06/09/2022] [Indexed: 11/29/2022]
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5
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Amirifar L, Besanjideh M, Nasiri R, Shamloo A, Nasrollahi F, de Barros NR, Davoodi E, Erdem A, Mahmoodi M, Hosseini V, Montazerian H, Jahangiry J, Darabi MA, Haghniaz R, Dokmeci MR, Annabi N, Ahadian S, Khademhosseini A. Droplet-based microfluidics in biomedical applications. Biofabrication 2021; 14. [PMID: 34781274 DOI: 10.1088/1758-5090/ac39a9] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 11/15/2021] [Indexed: 11/11/2022]
Abstract
Droplet-based microfluidic systems have been employed to manipulate discrete fluid volumes with immiscible phases. Creating the fluid droplets at microscale has led to a paradigm shift in mixing, sorting, encapsulation, sensing, and designing high throughput devices for biomedical applications. Droplet microfluidics has opened many opportunities in microparticle synthesis, molecular detection, diagnostics, drug delivery, and cell biology. In the present review, we first introduce standard methods for droplet generation (i.e., passive and active methods) and discuss the latest examples of emulsification and particle synthesis approaches enabled by microfluidic platforms. Then, the applications of droplet-based microfluidics in different biomedical applications are detailed. Finally, a general overview of the latest trends along with the perspectives and future potentials in the field are provided.
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Affiliation(s)
- Leyla Amirifar
- Mechanical Engineering, Sharif University of Technology, Tehran, Iran, Tehran, 11365-11155, Iran (the Islamic Republic of)
| | - Mohsen Besanjideh
- Department of Mechanical Engineering, Sharif University of Technology, Tehran, Tehran, 11365-11155, Iran (the Islamic Republic of)
| | - Rohollah Nasiri
- Department of Mechanical Engineering, Sharif University of Technology, Tehran, Tehran, 11365-11155, Iran (the Islamic Republic of)
| | - Amir Shamloo
- Department of Mechanical Engineering, Sharif University of Technology, Tehran, Tehran, 11365-11155, Iran (the Islamic Republic of)
| | | | - Natan Roberto de Barros
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, Los Angeles, 90024, UNITED STATES
| | - Elham Davoodi
- Bioengineering, University of California - Los Angeles, Los Angeles, Los Angeles, 90095, UNITED STATES
| | - Ahmet Erdem
- Bioengineering, University of California - Los Angeles, Los Angeles, Los Angeles, 90095, UNITED STATES
| | | | - Vahid Hosseini
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, Los Angeles, 90024, UNITED STATES
| | - Hossein Montazerian
- Bioengineering, University of California - Los Angeles, Los Angeles, Los Angeles, 90095, UNITED STATES
| | - Jamileh Jahangiry
- University of California - Los Angeles, Los Angeles, Los Angeles, 90095, UNITED STATES
| | | | - Reihaneh Haghniaz
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, Los Angeles, 90024, UNITED STATES
| | - Mehmet R Dokmeci
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, Los Angeles, 90024, UNITED STATES
| | - Nasim Annabi
- Chemical Engineering, UCLA, Los Angeles, Los Angeles, California, 90095, UNITED STATES
| | - Samad Ahadian
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, Los Angeles, 90024, UNITED STATES
| | - Ali Khademhosseini
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, Los Angeles, 90024, UNITED STATES
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6
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Zeming KK, Lu R, Woo KL, Sun G, Quek KY, Cheow LF, Chen CH, Han J, Lim SL. Multiplexed Single-Cell Leukocyte Enzymatic Secretion Profiling from Whole Blood Reveals Patient-Specific Immune Signature. Anal Chem 2021; 93:4374-4382. [PMID: 33600165 DOI: 10.1021/acs.analchem.0c03512] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Enzymatic secretion of immune cells (leukocytes) plays a dominant role in host immune responses to a myriad of biological triggers, including infections, cancers, and cardiovascular diseases. Current tools to probe these leukocytes inadequately profile these vital biomarkers; the need for sample preprocessing steps of cell lysis, labeling, washing, and pipetting inevitably triggers the cells, changes its basal state, and dilutes the individual cell secretion in bulk assays. Using a fully integrated system for multiplexed profiling of native immune single-cell enzyme secretion from 50 μL of undiluted blood, we eliminate sample handling. With a total analysis time of 60 min, the integrated platform performs six tasks of leukocyte extraction, cell washing, fluorescent enzyme substrate mixing, single-cell droplet making, droplet incubation, and real-time readout for leukocyte secretion profiling of neutrophil elastase, granzyme B, and metalloproteinase. We calibrated the device, optimized the protocols, and tested the leukocyte secretion of acute heart failure (AHF) patients at admission and predischarge. This paper highlights the presence of single-cell enzymatic immune phenotypes independent of CD marker labeling, which could potentially elucidate the innate immune response states. We found that patients recovering from AHF showed a corresponding reduction in immune-cell enzymatic secretion levels and donor-specific enzymatic signatures were observed, which suggests patient-to-patient heterogeneous immune response. This platform presents opportunities to elucidate the complexities of the immune response from a single drop of blood and bridge the current technological, biological, and medical gap in understanding immune response and biological triggers.
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Affiliation(s)
- Kerwin Kwek Zeming
- Critical Analytics for Manufacturing of Personalised Medicine, Singapore-MIT Alliance for Research and Technology, 1 Create Way, Enterprise Wing #04-13/14, 138602 Singapore
| | - Ri Lu
- Critical Analytics for Manufacturing of Personalised Medicine, Singapore-MIT Alliance for Research and Technology, 1 Create Way, Enterprise Wing #04-13/14, 138602 Singapore.,Graduate School for Integrative Sciences and Engineering, National University of Singapore, University Hall, Tan Chin Tuan Wing Level 04, #04-02, 21 Lower Kent Ridge Road, 119077 Singapore
| | - Kai Lee Woo
- Department of Cardiology, National University Heart Center, 1E Kent Ridge Road, 119228, Singapore
| | - Guoyun Sun
- Graduate School for Integrative Sciences and Engineering, National University of Singapore, University Hall, Tan Chin Tuan Wing Level 04, #04-02, 21 Lower Kent Ridge Road, 119077 Singapore
| | - Kai Yun Quek
- Critical Analytics for Manufacturing of Personalised Medicine, Singapore-MIT Alliance for Research and Technology, 1 Create Way, Enterprise Wing #04-13/14, 138602 Singapore
| | - Lih Feng Cheow
- Critical Analytics for Manufacturing of Personalised Medicine, Singapore-MIT Alliance for Research and Technology, 1 Create Way, Enterprise Wing #04-13/14, 138602 Singapore.,Graduate School for Integrative Sciences and Engineering, National University of Singapore, University Hall, Tan Chin Tuan Wing Level 04, #04-02, 21 Lower Kent Ridge Road, 119077 Singapore.,Department of Biomedical Engineering, National University of Singapore, 4 Engineering Drive 3, 117583 Singapore
| | - Chia-Hung Chen
- Department of Biomedical Engineering, College of Engineering, City University of Hong Kong, YEUNG-B5121A, Hong Kong
| | - Jongyoon Han
- Critical Analytics for Manufacturing of Personalised Medicine, Singapore-MIT Alliance for Research and Technology, 1 Create Way, Enterprise Wing #04-13/14, 138602 Singapore.,Department of Electrical Engineering, Massachusetts Institute of Technology, 50 Vassar Street, Cambridge, Massachusetts 02142, United States.,Department of Biological Engineering, Massachusetts Institute of Technology, 21 Ames Street, #56-651, Cambridge, Massachusetts 02142, United States
| | - Shir Lynn Lim
- Yong Loo Lin School of Medicine, National University of Singapore, 10 Medical Drive, 117597 Singapore.,Department of Cardiology, National University Heart Center, 1E Kent Ridge Road, 119228, Singapore
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7
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Lei Z, Jian M, Li X, Wei J, Meng X, Wang Z. Biosensors and bioassays for determination of matrix metalloproteinases: state of the art and recent advances. J Mater Chem B 2021; 8:3261-3291. [PMID: 31750853 DOI: 10.1039/c9tb02189b] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Matrix metalloproteinases (MMPs) are closely associated with various physiological and pathological processes, and have been regarded as potential biomarkers for severe diseases including cancer. Accurate determination of MMPs would advance our understanding of their roles in disease progression, and is of great significance for disease diagnosis, treatment and prognosis. In this review, we present a comprehensive overview of the developed bioassays/biosensors for detection of MMPs, and highlight the recent advancement in nanomaterial-based immunoassays for MMP abundance measurements and nanomaterial-based biosensors for MMP activity determination. Enzyme-linked immunosorbent assay (ELISA)-based immunoassays provide information about total levels of MMPs with high specificity and sensitivity, while target-based biosensors measure the amounts of active MMPs, and allow imaging of MMP activities in vivo. For multiplex and high-throughput analysis of MMPs, microfluidics and microarray-based assays are described. Additionally, we put forward the existing challenges and future prospects from our perspective.
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Affiliation(s)
- Zhen Lei
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, P. R. China
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8
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Wang M, Nai MH, Huang RYJ, Leo HL, Lim CT, Chen CH. High-throughput functional profiling of single adherent cells via hydrogel drop-screen. LAB ON A CHIP 2021; 21:764-774. [PMID: 33506832 DOI: 10.1039/d0lc01294g] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Single-adherent-cell phenotyping on an extracellular matrix (ECM) is essential to determine cellular biological functions, such as morphological adaptations and biomolecule secretions, correlated to medical treatments and metastasis, yet there is no available platform for such high-throughput screening. Here, a novel hydrogel drop-screen device was developed to rapidly measure large-scale single-cell morphologies and multiple secretions on substrates for phenotype profiling. Single cells were first anchored to microfluidically fabricated gelatin particles providing mechanical stimulations similar to those from ECM in vivo. The cellular morphologies were then examined by quantifying the amount of cytoskeleton expressed on the particles. With droplet encapsulation, adherent single-cell multiplexed secretion analysis of a disintegrin and metalloproteinases (ADAMs) and matrix metalloproteinases (MMPs) was conducted at a throughput of ∼102 cells per second, revealing distinct functional heterogeneities associated with extracellular mechanical stimulations. The level of cell heterogeneity increased with increasing substrate stuffiness. Moreover, because of the promising screening capability, a database related to both nontumorigenic and tumorigenic breast cells (MCF10A, MCF-7, and MDA-MB-231) was constructed. The respective cell distributions and heterogeneities based on the morphologies and secreted bioindicators, such as MMP-2, MMP-3, MMP-9, and ADAM-8, were measured and found to correspond to the progress of tumor metastasis.
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Affiliation(s)
- Ming Wang
- NUS Graduate School for Integrative Sciences & Engineering, National University of Singapore, 21 Lower Kent Ridge Road, 119077 Singapore and Department of Biomedical Engineering, National University of Singapore, 4 Engineering Drive 3, 117583 Singapore and Institute for Health Innovation and Technology (iHealthtech), MD6, 14 Medical Drive 14-01, 117599 Singapore
| | - Mui Hoon Nai
- Department of Biomedical Engineering, National University of Singapore, 4 Engineering Drive 3, 117583 Singapore
| | - Ruby Yun-Ju Huang
- College of Medicine, National Taiwan University, No.1 Jen-Ai Road, Taipei, 10051, Taiwan and Graduate Institute of Oncology, College of Medicine, National Taiwan University, No. 1, Sec. 4, Roosevelt road, Taipei, 10617, Taiwan and Department of Biomedical Engineering, National Taiwan University, No.1, Sec.1, Jen-Ai Road, Taipei, 10051, Taiwan
| | - Hwa Liang Leo
- NUS Graduate School for Integrative Sciences & Engineering, National University of Singapore, 21 Lower Kent Ridge Road, 119077 Singapore and Department of Biomedical Engineering, National University of Singapore, 4 Engineering Drive 3, 117583 Singapore
| | - Chwee Teck Lim
- NUS Graduate School for Integrative Sciences & Engineering, National University of Singapore, 21 Lower Kent Ridge Road, 119077 Singapore and Department of Biomedical Engineering, National University of Singapore, 4 Engineering Drive 3, 117583 Singapore and Institute for Health Innovation and Technology (iHealthtech), MD6, 14 Medical Drive 14-01, 117599 Singapore and Mechanobiology Institute, National University of Singapore, 117411 Singapore
| | - Chia-Hung Chen
- Department of Biomedical Engineering, City University of Hong Kong, Y6700, 83 Tat Chee Avenue, Hong Kong SAR, China.
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Zenhausern R, Chen CH, Yoon JY. Microfluidic sample preparation for respiratory virus detection: A review. BIOMICROFLUIDICS 2021; 15:011503. [PMID: 33643510 PMCID: PMC7889292 DOI: 10.1063/5.0041089] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 01/28/2021] [Indexed: 05/05/2023]
Abstract
Techniques used to prepare clinical samples have been perfected for use in diagnostic testing in a variety of clinical situations, e.g., to extract, concentrate, and purify respiratory virus particles. These techniques offer a high level of purity and concentration of target samples but require significant equipment and highly trained personnel to conduct, which is difficult to achieve in resource-limited environments where rapid testing and diagnostics are crucial for proper handling of respiratory viruses. Microfluidics has popularly been utilized toward rapid virus detection in resource-limited environments, where most devices focused on detection rather than sample preparation. Initial microfluidic prototypes have been hindered by their reliance on several off-chip preprocessing steps and external laboratory equipment. Recently, sample preparation methods have also been incorporated into microfluidics to conduct the virus detection in an all-in-one, automated manner. Extraction, concentration, and purification of viruses have been demonstrated in smaller volumes of samples and reagents, with no need for specialized training or complex machinery. Recent devices show the ability to function independently and efficiently to provide rapid, automated sample preparation as well as the detection of viral samples with high efficiency. In this review, methods of microfluidic sample preparation for the isolation and purification of viral samples are discussed, limitations of current systems are summarized, and potential advances are identified.
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Affiliation(s)
- Ryan Zenhausern
- Department of Biomedical Engineering, The University of Arizona, Tucson, Arizona 85721, USA
| | - Chia-Hung Chen
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong 999077, China
| | - Jeong-Yeol Yoon
- Department of Biomedical Engineering, The University of Arizona, Tucson, Arizona 85721, USA
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10
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Sun G, Teng Y, Zhao Z, Cheow LF, Yu H, Chen CH. Functional Stem Cell Sorting via Integrative Droplet Synchronization. Anal Chem 2020; 92:7915-7923. [DOI: 10.1021/acs.analchem.0c01312] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Guoyun Sun
- Department of Biomedical Engineering, National University of Singapore, 4 Engineering Drive 3, 04-08, Singapore
| | - Yao Teng
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, 2 Medical Drive, MD9, Singapore
| | - Zixuan Zhao
- Mechanobiology Institute, National University of Singapore, 5A Engineering Drive 1, 04-08 Singapore
| | - Lih Feng Cheow
- Department of Biomedical Engineering, National University of Singapore, 4 Engineering Drive 3, 04-08, Singapore
| | - Hanry Yu
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, 2 Medical Drive, MD9, Singapore
- Mechanobiology Institute, National University of Singapore, 5A Engineering Drive 1, 04-08 Singapore
- Institute of Bioengineering and Nanotechnology, A*STAR, 31 Biopolis Way, The Nanos 07-01, Singapore
- CAMP, Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, 04-01, Singapore
| | - Chia-Hung Chen
- Department of Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong SAR China
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11
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Single-cell assays using integrated continuous-flow microfluidics. Methods Enzymol 2019. [PMID: 31668236 DOI: 10.1016/bs.mie.2019.06.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
The recent maturation of continuous-flow microfluidic technologies has coincided with transformative new methods to profile single cells, including their genetic types, protein expression and enzyme activities. Continuous-flow high-throughput single-cell screening and sorting can reveal relationships across cellular phenotypes (e.g., enzyme activity and secretion) and genetic fingerprints. This technology provides unique opportunities, as well as experimental and computational challenges, for integrative approaches that can process large amounts of single-cell data. In this chapter, we discuss recent advances in integrated continuous-flow microfluidic approaches with a focus on measurements and statistical analysis of single-cell enzyme activity and their applications in quantitative biology, synthetic biology, and diagnosis.
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12
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Wei SC, Hsu MN, Chen CH. Plasmonic droplet screen for single-cell secretion analysis. Biosens Bioelectron 2019; 144:111639. [DOI: 10.1016/j.bios.2019.111639] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 08/11/2019] [Accepted: 08/26/2019] [Indexed: 01/16/2023]
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13
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Yao H, Zhao H, Zhao X, Pan X, Feng J, Xu F, Zhang S, Zhang X. Label-free Mass Cytometry for Unveiling Cellular Metabolic Heterogeneity. Anal Chem 2019; 91:9777-9783. [PMID: 31242386 DOI: 10.1021/acs.analchem.9b01419] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Comprehensive analysis of single-cell metabolites is critical since differences in cellular chemical compositions give rise to specialized biological functions. Herein, we propose a label-free mass cytometry by coupling flow cytometry to ESI-MS (named CyESI-MS) for high-coverage and high-throughput detection of cellular metabolites. Cells in suspension were isolated, online extracted by sheath fluid, and lysed during gas-assisted electrospray, followed by real-time MS analysis. Hundreds of metabolites, including nucleotides, amino acids, peptides, carbohydrates, fatty acyls, glycerolipids, glycerophospholipids, and sphingolipids, were detected and identified from one single cell. Discrimination of four types of cancer cell lines and even three subtypes of breast cancer cells was readily achieved using their distinct metabolic profiles. Furthermore, we screened out 102 characteristic ions from 615 detected peak signals for distinguishing breast cancer cell subtypes and identified 40 characteristic molecules which exhibited significant differences among these subtypes and would be potential metabolic markers for clinical diagnosis. CyESI-MS is expected to be a new-generation mass cytometry for studying cell heterogeneity on the metabolic level.
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Affiliation(s)
- Huan Yao
- Department of Chemistry , Tsinghua University , Beijing 100084 , P.R. China
| | - Hansen Zhao
- Department of Chemistry , Tsinghua University , Beijing 100084 , P.R. China
| | - Xu Zhao
- Department of Chemistry , Tsinghua University , Beijing 100084 , P.R. China
| | - Xingyu Pan
- Department of Chemistry , Tsinghua University , Beijing 100084 , P.R. China
| | - Jiaxin Feng
- Department of Chemistry , Tsinghua University , Beijing 100084 , P.R. China
| | - Fujian Xu
- Department of Chemistry , Tsinghua University , Beijing 100084 , P.R. China
| | - Sichun Zhang
- Department of Chemistry , Tsinghua University , Beijing 100084 , P.R. China
| | - Xinrong Zhang
- Department of Chemistry , Tsinghua University , Beijing 100084 , P.R. China
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