101
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Chowdhury AN, Vo HT, Olang S, Mappus E, Peterson B, Hlavac N, Harvey T, Dean D. A Customizable Chamber for Measuring Cell Migration. J Vis Exp 2017. [PMID: 28362404 DOI: 10.3791/55264] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Cell migration is a vital part of immune responses, growth, and wound healing. Cell migration is a complex process that involves interactions between cells, the extracellular matrix, and soluble and non-soluble chemical factors (e.g., chemoattractants). Standard methods for measuring the migration of cells, such as the Boyden chamber assay, work by counting cells on either side of a divider. These techniques are easy to use; however, they offer little geometric modification for different applications. In contrast, microfluidic devices can be used to observe cell migration with customizable concentration gradients of soluble factors1,2. However, methods for making microfluidics based assays can be difficult to learn. Here, we describe an easy method for creating cell culture chambers to measure cell migration in response to chemical concentration gradients. Our cell migration chamber method can create different linear concentration gradients in order to study cell migration for a variety of applications. This method is relatively easy to use and is typically performed by undergraduate students. The microchannel chamber was created by placing an acrylic insert in the shape of the final microchannel chamber well into a Petri dish. After this, poly(dimethylsiloxane) (PDMS) was poured on top of the insert. The PDMS was allowed to harden and then the insert was removed. This allowed for the creation of wells in any desired shape or size. Cells may be subsequently added to the microchannel chamber, and soluble agents can be added to one of the wells by soaking an agarose block in the desired agent. The agarose block is added to one of the wells, and time-lapse images can be taken of the microchannel chamber in order to quantify cell migration. Variations to this method can be made for a given application, making this method highly customizable.
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Affiliation(s)
| | - Huu Tri Vo
- Department of Bioengineering, Clemson University
| | - Sharon Olang
- Department of Bioengineering, Clemson University
| | | | | | - Nora Hlavac
- Department of Bioengineering, Clemson University
| | - Tyler Harvey
- Department of Bioengineering, Clemson University
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102
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Poon PY, Yue PYK, Wong RNS. A Device for Performing Cell Migration/Wound Healing in a 96-Well Plate. J Vis Exp 2017. [PMID: 28362371 DOI: 10.3791/55411] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The cell migration/wounding assay is a commonly used method to study cell migration and other biological processes, such as angiogenesis and tumor metastasis. In this assay, cells are grown to form a confluent monolayer and a mechanical wound is created by scratching with a device. Then the migration rate of the cells towards the denuded area can be monitored by imaging. Our 8-channel mechanical wounder is designed to tackle most of the problems associated with the cell migration assay. Firstly, our wounder can be easily sterilized by autoclaving or with common disinfectants. Secondly, the individual adjustable pins allow even contact with the cell culture plate so that sharp and reproducible wounds can be created. Thirdly, the guiding bars on both sides of the wounder ensure consistent wounding position in each well. The use of disposable plastic pipette tips for wounding can further provide better handling of the wounder as well as to minimize cross-contamination. In conclusion, our cell wounder can provide researchers with a user friendly and reproducible device for performing the cell migration assay using the standard 96-well culture plate.
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Affiliation(s)
- Po Ying Poon
- Department of Biology, Hong Kong Baptist University
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103
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MERAJVER SOFIA, PHADKE SAMEER, SOELLNER MATTHEW. Conquering the challenges of genotypic and phenotypic tumor heterogeneity to realize the promise of personalized cancer therapy: the role of academia. TRANSACTIONS OF THE AMERICAN CLINICAL AND CLIMATOLOGICAL ASSOCIATION 2017; 128:169-179. [PMID: 28790501 PMCID: PMC5525385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The advent of rapid and progressively more affordable sequencing and gene expression studies have spurred research on therapies for cancer targeted to specific gene alterations. With few exceptions, such as those cancers with either a paucity of mutations or major chromosomal rearrangements driving the neoplastic transformation, the approaches based on one mutational target-one drug have achieved only modest outcomes in cancer. Using the paradigm of aggressive breast cancers, we will show the mathematical explanation that predicts our failures and indicates a plausible way forward. An integrated network modeling approach to intracellular signaling, metabolism, and microenvironment interactions, coupled with the use of synthetic devices engineered to understand phenotypic heterogeneity of cancer lesions, may form the basis for selection of the next-generation of personalized therapies for cancer. Academia can play a larger role in bringing effective drugs to first-in-human trials in this context.
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Affiliation(s)
- SOFIA MERAJVER
- Correspondence and reprint requests: Sofia Merajver, MD, PhD, Department of Internal Medicine, University of Michigan Medical School,
1500 E Medical Center Drive # 7217, Ann Arbor, Michigan 48109(734) 936-6000
| | | | - MATTHEW SOELLNER
- Correspondence and reprint requests: Sofia Merajver, MD, PhD, Department of Internal Medicine, University of Michigan Medical School,
1500 E Medical Center Drive # 7217, Ann Arbor, Michigan 48109(734) 936-6000
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104
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Ji RC. Lymph Nodes and Cancer Metastasis: New Perspectives on the Role of Intranodal Lymphatic Sinuses. Int J Mol Sci 2016; 18:ijms18010051. [PMID: 28036019 PMCID: PMC5297686 DOI: 10.3390/ijms18010051] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 12/21/2016] [Accepted: 12/23/2016] [Indexed: 02/07/2023] Open
Abstract
The lymphatic system is essential for transporting interstitial fluid, soluble antigen, and immune cells from peripheral tissues to lymph nodes (LNs). Functional integrity of LNs is dependent on intact lymphatics and effective lymph drainage. Molecular mechanisms that facilitate interactions between tumor cells and lymphatic endothelial cells (LECs) during tumor progression still remain to be identified. The cellular and molecular structures of LNs are optimized to trigger a rapid and efficient immune response, and to participate in the process of tumor metastasis by stimulating lymphangiogenesis and establishing a premetastatic niche in LNs. Several molecules, e.g., S1P, CCR7-CCL19/CCL21, CXCL12/CXCR4, IL-7, IFN-γ, TGF-β, and integrin α4β1 play an important role in controlling the activity of LN stromal cells including LECs, fibroblastic reticular cells (FRCs) and follicular dendritic cells (DCs). The functional stromal cells are critical for reconstruction and remodeling of the LN that creates a unique microenvironment of tumor cells and LECs for cancer metastasis. LN metastasis is a major determinant for the prognosis of most human cancers and clinical management. Ongoing work to elucidate the function and molecular regulation of LN lymphatic sinuses will provide insight into cancer development mechanisms and improve therapeutic approaches for human malignancy.
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Affiliation(s)
- Rui-Cheng Ji
- Faculty of Welfare and Health Science, Oita University, Oita 870-1192, Japan.
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105
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Macrophages Enhance Migration in Inflammatory Breast Cancer Cells via RhoC GTPase Signaling. Sci Rep 2016; 6:39190. [PMID: 27991524 PMCID: PMC5171813 DOI: 10.1038/srep39190] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Accepted: 11/21/2016] [Indexed: 01/06/2023] Open
Abstract
Inflammatory breast cancer (IBC) is the most lethal form of breast cancer. All IBC patients have lymph node involvement and one-third of patients already have distant metastasis at diagnosis. This propensity for metastasis is a hallmark of IBC distinguishing it from less lethal non-inflammatory breast cancers (nIBC). Genetic profiling studies have been conducted to differentiate IBC from nIBC, but no IBC cancer-cell-specific gene signature has been identified. We hypothesized that a tumor-extrinsic factor, notably tumor-associated macrophages, promotes and contributes to IBC’s extreme metastatic phenotype. To this end, we studied the effect of macrophage-conditioned media (MCM) on IBC. We show that two IBC cell lines are hyper-responsive to MCM as compared to normal-like breast and aggressive nIBC cell lines. We further interrogated IBC’s hyper-responsiveness to MCM using a microfluidic migration device, which permits individual cell migration path tracing. We found the MCM “primes” the IBC cells’ cellular machinery to become extremely migratory in response to a chemoattractant. We determined that interleukins −6, −8, and −10 within the MCM are sufficient to stimulate this enhanced IBC migration effect, and that the known metastatic oncogene, RhoC GTPase, is necessary for the enhanced migration response.
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106
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Poudineh M, Labib M, Ahmed S, Nguyen LNM, Kermanshah L, Mohamadi RM, Sargent EH, Kelley SO. Profiling Functional and Biochemical Phenotypes of Circulating Tumor Cells Using a Two‐Dimensional Sorting Device. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608983] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Mahla Poudineh
- Department of Electrical and Computer Engineering University of Toronto Toronto ON Canada
| | - Mahmoud Labib
- Leslie Dan Faculty of Pharmacy University of Toronto Toronto ON Canada
| | - Sharif Ahmed
- Leslie Dan Faculty of Pharmacy University of Toronto Toronto ON Canada
| | | | - Leyla Kermanshah
- Institute of Biomaterials and Biomedical Engineering University of Toronto Toronto ON Canada
| | - Reza M. Mohamadi
- Leslie Dan Faculty of Pharmacy University of Toronto Toronto ON Canada
| | - Edward H. Sargent
- Department of Electrical and Computer Engineering University of Toronto Toronto ON Canada
| | - Shana O. Kelley
- Leslie Dan Faculty of Pharmacy University of Toronto Toronto ON Canada
- Institute of Biomaterials and Biomedical Engineering University of Toronto Toronto ON Canada
- Department of Biochemistry University of Toronto Toronto ON Canada
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107
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Poudineh M, Labib M, Ahmed S, Nguyen LNM, Kermanshah L, Mohamadi RM, Sargent EH, Kelley SO. Profiling Functional and Biochemical Phenotypes of Circulating Tumor Cells Using a Two-Dimensional Sorting Device. Angew Chem Int Ed Engl 2016; 56:163-168. [DOI: 10.1002/anie.201608983] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 11/01/2016] [Indexed: 01/05/2023]
Affiliation(s)
- Mahla Poudineh
- Department of Electrical and Computer Engineering; University of Toronto; Toronto ON Canada
| | - Mahmoud Labib
- Leslie Dan Faculty of Pharmacy; University of Toronto; Toronto ON Canada
| | - Sharif Ahmed
- Leslie Dan Faculty of Pharmacy; University of Toronto; Toronto ON Canada
| | | | - Leyla Kermanshah
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Toronto ON Canada
| | - Reza M. Mohamadi
- Leslie Dan Faculty of Pharmacy; University of Toronto; Toronto ON Canada
| | - Edward H. Sargent
- Department of Electrical and Computer Engineering; University of Toronto; Toronto ON Canada
| | - Shana O. Kelley
- Leslie Dan Faculty of Pharmacy; University of Toronto; Toronto ON Canada
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Toronto ON Canada
- Department of Biochemistry; University of Toronto; Toronto ON Canada
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108
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Jo MC, Qin L. Microfluidic Platforms for Yeast-Based Aging Studies. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:5787-5801. [PMID: 27717149 PMCID: PMC5554731 DOI: 10.1002/smll.201602006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 08/30/2016] [Indexed: 06/06/2023]
Abstract
The budding yeast Saccharomyces cerevisiae has been a powerful model for the study of aging and has enabled significant contributions to our understanding of basic mechanisms of aging in eukaryotic cells. However, the laborious low-throughput nature of conventional methods of performing aging assays limits the pace of discoveries in this field. Some of the technical challenges of conventional aging assay methods can be overcome by use of microfluidic systems coupled to time-lapse microscopy. One of the major advantages is the ability of a microfluidic system to perform long-term cell culture under well-defined environmental conditions while tracking individual yeast. Here, recent advancements in microfluidic platforms for various yeast-based studies including replicative lifespan assay, long-term culture and imaging, gene expression, and cell signaling are discussed. In addition, emerging problems and limitations of current microfluidic approaches are examined and perspectives on the future development of this dynamic field are presented.
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Affiliation(s)
- Myeong Chan Jo
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, 77030, USA
- Department of Cell and Developmental Biology, Weill Medical College of Cornell University, New York, NY, 10065, USA
| | - Lidong Qin
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, 77030, USA
- Department of Cell and Developmental Biology, Weill Medical College of Cornell University, New York, NY, 10065, USA
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109
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Portillo-Lara R, Annabi N. Microengineered cancer-on-a-chip platforms to study the metastatic microenvironment. LAB ON A CHIP 2016; 16:4063-4081. [PMID: 27605305 DOI: 10.1039/c6lc00718j] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
More than 90% of cancer-related deaths can be attributed to the occurrence of metastatic diseases. Recent studies have highlighted the importance of the multicellular, biochemical and biophysical stimuli from the tumor microenvironment during carcinogenesis, treatment failure, and metastasis. Therefore, there is a need for experimental platforms that are able to recapitulate the complex pathophysiological features of the metastatic microenvironment. Recent advancements in biomaterials, microfluidics, and tissue engineering have led to the development of living multicellular microculture systems, which are maintained in controllable microenvironments and function with organ level complexity. The applications of these "on-chip" technologies for detection, separation, characterization and three dimensional (3D) propagation of cancer cells have been extensively reviewed in previous works. In this contribution, we focus on integrative microengineered platforms that allow the study of multiple aspects of the metastatic microenvironment, including the physicochemical cues from the tumor associated stroma, the heterocellular interactions that drive trans-endothelial migration and angiogenesis, the environmental stresses that metastatic cancer cells encounter during migration, and the physicochemical gradients that direct cell motility and invasion. We discuss the application of these systems as in vitro assays to elucidate fundamental mechanisms of cancer metastasis, as well as their use as human relevant platforms for drug screening in biomimetic microenvironments. We then conclude with our commentaries on current progress and future perspectives of microengineered systems for fundamental and translational cancer research.
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Affiliation(s)
- R Portillo-Lara
- Department of Chemical Engineering, Northeastern University, 451 Snell Engineering Building, 360 Huntington Ave, Boston, MA 02115, USA. and Centro de Biotecnología-FEMSA, Tecnológico de Monterrey, Monterrey, Mexico
| | - N Annabi
- Department of Chemical Engineering, Northeastern University, 451 Snell Engineering Building, 360 Huntington Ave, Boston, MA 02115, USA. and Biomaterials Innovation Research Center, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA and Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, USA
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110
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Li Y, Xu T, Zou H, Chen X, Sun D, Yang M. Cell migration microfluidics for electrotaxis-based heterogeneity study of lung cancer cells. Biosens Bioelectron 2016; 89:837-845. [PMID: 27816579 DOI: 10.1016/j.bios.2016.10.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2016] [Revised: 09/30/2016] [Accepted: 10/03/2016] [Indexed: 01/17/2023]
Abstract
Tumor metastasis involves the migration of cells from primary site to a distant location. Recently, it was established that cancer cells from the same tumor were heterogeneous in migratory ability. Numerous studies have demonstrated that cancer cells undergo reorientation and migration directionally under physiological electric field (EF), which has potential implications in metastasis. Microfluidic devices with channel structures of defined dimensions provide controllable microenvironments to enable real-time observation of cell migration. In this study, we developed two polydimethylsiloxane (PDMS)-based microfluidic devices for long-term electrotaxis study. In the first chip, three different intensities of EFs were generated in a single channel to study cell electrotactic behavior with high efficiency. We observed that the lung adenocarcinoma H1975 cells underwent cathodal migration with changing cellular orientation. To address the issue of cell electrotactic heterogeneity, we also developed a cell isolation device integrating cell immobilization structure, stable EF generator and cell retrieval module in one microfluidic chip to sort out different cell subpopulations based on electrotactic ability. High electrotactic and low electrotactic cells were harvested separately for colony formation assay and transcriptional analysis of migration-related genes. The results showed that H1975 cell motility was related to EGFR expression in the absence of EF stimulation, while in the presence of EF it was associated with PTEN expression. Up-regulation of RhoA was observed in cells with high motility, regardless of EF. The easy cell manipulation and precise field control of the microfluidic devices may enable further study of tumor heterogeneity in complex electrotactic environments.
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Affiliation(s)
- Yaping Li
- Department of Biomedical Sciences, City University of Hong Kong, Hong Kong, China; Key Laboratory of Biochip Technology, Biotech and Health Centre, Shenzhen, Research Institutes of City University of Hong Kong, Shenzhen, China
| | - Tao Xu
- Department of Biomedical Sciences, City University of Hong Kong, Hong Kong, China; Liaoning Medical University, Jinzhou, Liaoning, China
| | - Heng Zou
- Department of Biomedical Sciences, City University of Hong Kong, Hong Kong, China; Key Laboratory of Biochip Technology, Biotech and Health Centre, Shenzhen, Research Institutes of City University of Hong Kong, Shenzhen, China
| | - Xiaomei Chen
- Key Laboratory of Biochip Technology, Biotech and Health Centre, Shenzhen, Research Institutes of City University of Hong Kong, Shenzhen, China
| | - Dong Sun
- Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong, China
| | - Mengsu Yang
- Department of Biomedical Sciences, City University of Hong Kong, Hong Kong, China; Key Laboratory of Biochip Technology, Biotech and Health Centre, Shenzhen, Research Institutes of City University of Hong Kong, Shenzhen, China.
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111
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Handly LN, Yao J, Wollman R. Signal Transduction at the Single-Cell Level: Approaches to Study the Dynamic Nature of Signaling Networks. J Mol Biol 2016; 428:3669-82. [PMID: 27430597 PMCID: PMC5023475 DOI: 10.1016/j.jmb.2016.07.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 07/07/2016] [Accepted: 07/11/2016] [Indexed: 12/16/2022]
Abstract
Signal transduction, or how cells interpret and react to external events, is a fundamental aspect of cellular function. Traditional study of signal transduction pathways involves mapping cellular signaling pathways at the population level. However, population-averaged readouts do not adequately illuminate the complex dynamics and heterogeneous responses found at the single-cell level. Recent technological advances that observe cellular response, computationally model signaling pathways, and experimentally manipulate cells now enable studying signal transduction at the single-cell level. These studies will enable deeper insights into the dynamic nature of signaling networks.
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Affiliation(s)
- L Naomi Handly
- Departments of Chemistry and Biochemistry, Integrative Biology and Physiology, and Institute for Quantitative and Computational Biosciences (QCB), UCLA, Los Angeles, CA 90095, USA
| | - Jason Yao
- Departments of Chemistry and Biochemistry, Integrative Biology and Physiology, and Institute for Quantitative and Computational Biosciences (QCB), UCLA, Los Angeles, CA 90095, USA
| | - Roy Wollman
- Departments of Chemistry and Biochemistry, Integrative Biology and Physiology, and Institute for Quantitative and Computational Biosciences (QCB), UCLA, Los Angeles, CA 90095, USA.
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112
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Wynn ML, Yates JA, Evans CR, Van Wassenhove LD, Wu ZF, Bridges S, Bao L, Fournier C, Ashrafzadeh S, Merrins MJ, Satin LS, Schnell S, Burant CF, Merajver SD. RhoC GTPase Is a Potent Regulator of Glutamine Metabolism and N-Acetylaspartate Production in Inflammatory Breast Cancer Cells. J Biol Chem 2016; 291:13715-29. [PMID: 27129239 PMCID: PMC4919454 DOI: 10.1074/jbc.m115.703959] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 04/01/2016] [Indexed: 01/04/2023] Open
Abstract
Inflammatory breast cancer (IBC) is an extremely lethal cancer that rapidly metastasizes. Although the molecular attributes of IBC have been described, little is known about the underlying metabolic features of the disease. Using a variety of metabolic assays, including (13)C tracer experiments, we found that SUM149 cells, the primary in vitro model of IBC, exhibit metabolic abnormalities that distinguish them from other breast cancer cells, including elevated levels of N-acetylaspartate, a metabolite primarily associated with neuronal disorders and gliomas. Here we provide the first evidence of N-acetylaspartate in breast cancer. We also report that the oncogene RhoC, a driver of metastatic potential, modulates glutamine and N-acetylaspartate metabolism in IBC cells in vitro, revealing a novel role for RhoC as a regulator of tumor cell metabolism that extends beyond its well known role in cytoskeletal rearrangement.
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Affiliation(s)
- Michelle L Wynn
- From the Departments of Internal Medicine, Molecular and Integrative Physiology, and
| | | | | | | | - Zhi Fen Wu
- From the Departments of Internal Medicine
| | | | - Liwei Bao
- From the Departments of Internal Medicine
| | | | | | - Matthew J Merrins
- the Department of Medicine, University of Wisconsin, Madison, Wisconsin 53705, and the William S. Middleton Memorial Veterans Hospital, Madison, Wisconsin 53705
| | - Leslie S Satin
- Pharmacology, University of Michigan, Ann Arbor, Michigan 48109
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113
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A Microfluidic Device for Hydrodynamic Trapping and Manipulation Platform of a Single Biological Cell. APPLIED SCIENCES-BASEL 2016. [DOI: 10.3390/app6020040] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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114
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115
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116
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Yesilkoy F, Ueno R, Desbiolles BXE, Grisi M, Sakai Y, Kim BJ, Brugger J. Highly efficient and gentle trapping of single cells in large microfluidic arrays for time-lapse experiments. BIOMICROFLUIDICS 2016; 10:014120. [PMID: 26909126 PMCID: PMC4760974 DOI: 10.1063/1.4942457] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Accepted: 02/09/2016] [Indexed: 05/24/2023]
Abstract
The isolation of single biological cells and their further cultivation in dedicated arrayed chambers are key to the collection of statistically reliable temporal data in cell-based biological experiments. In this work, we present a hydrodynamic single cell trapping and culturing platform that facilitates cell observation and experimentation using standard bio-lab equipment. The proposed design leverages the stochastic position of the cells as they flow into the structured microfluidic channels, where hundreds of single cells are then arrayed in nanoliter chambers for simultaneous cell specific data collection. Numerical simulation tools are used to devise and implement a hydrodynamic cell trapping mechanism that is minimally detrimental to the cell cycle and retains high overall trapping efficiency (∼70%) with the capability of reaching high fill factors (>90%) in short loading times (1-4 min) in a 400-trap device. A Monte Carlo model is developed using the design parameters to estimate the system trapping efficiencies, which show strong agreement with the experimentally acquired data. As proof of concept, arrayed mammalian tissue cells (MIA PaCa-2) are cultured in the microfluidic chambers for two days without viability problems.
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Affiliation(s)
| | - R Ueno
- Institute of Industrial Science, The University of Tokyo , Meguro-ku, Tokyo 153-8505, Japan
| | - B X E Desbiolles
- Microsystems Laboratory, Ecole Polytechnique Federale de Lausanne , 1015 Lausanne, Switzerland
| | - M Grisi
- Microsystems Laboratory, Ecole Polytechnique Federale de Lausanne , 1015 Lausanne, Switzerland
| | - Y Sakai
- Institute of Industrial Science, The University of Tokyo , Meguro-ku, Tokyo 153-8505, Japan
| | - B J Kim
- Institute of Industrial Science, The University of Tokyo , Meguro-ku, Tokyo 153-8505, Japan
| | - J Brugger
- Microsystems Laboratory, Ecole Polytechnique Federale de Lausanne , 1015 Lausanne, Switzerland
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117
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Microfluidic Organ/Body-on-a-Chip Devices at the Convergence of Biology and Microengineering. SENSORS 2015; 15:31142-70. [PMID: 26690442 PMCID: PMC4721768 DOI: 10.3390/s151229848] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 11/16/2015] [Accepted: 12/04/2015] [Indexed: 12/24/2022]
Abstract
Recent advances in biomedical technologies are mostly related to the convergence of biology with microengineering. For instance, microfluidic devices are now commonly found in most research centers, clinics and hospitals, contributing to more accurate studies and therapies as powerful tools for drug delivery, monitoring of specific analytes, and medical diagnostics. Most remarkably, integration of cellularized constructs within microengineered platforms has enabled the recapitulation of the physiological and pathological conditions of complex tissues and organs. The so-called “organ-on-a-chip” technology, which represents a new avenue in the field of advanced in vitro models, with the potential to revolutionize current approaches to drug screening and toxicology studies. This review aims to highlight recent advances of microfluidic-based devices towards a body-on-a-chip concept, exploring their technology and broad applications in the biomedical field.
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118
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Khalili AA, Ahmad MR. Numerical Analysis of Hydrodynamic Flow in Microfluidic Biochip for Single-Cell Trapping Application. Int J Mol Sci 2015; 16:26770-85. [PMID: 26569218 PMCID: PMC4661846 DOI: 10.3390/ijms161125987] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2015] [Revised: 07/29/2015] [Accepted: 08/05/2015] [Indexed: 12/23/2022] Open
Abstract
Single-cell analysis has become the interest of a wide range of biological and biomedical engineering research. It could provide precise information on individual cells, leading to important knowledge regarding human diseases. To perform single-cell analysis, it is crucial to isolate the individual cells before further manipulation is carried out. Recently, microfluidic biochips have been widely used for cell trapping and single cell analysis, such as mechanical and electrical detection. This work focuses on developing a finite element simulation model of single-cell trapping system for any types of cells or particles based on the hydrodynamic flow resistance (Rh) manipulations in the main channel and trap channel to achieve successful trapping. Analysis is carried out using finite element ABAQUS-FEA™ software. A guideline to design and optimize single-cell trapping model is proposed and the example of a thorough optimization analysis is carried out using a yeast cell model. The results show the finite element model is able to trap a single cell inside the fluidic environment. Fluid's velocity profile and streamline plots for successful and unsuccessful single yeast cell trapping are presented according to the hydrodynamic concept. The single-cell trapping model can be a significant important guideline in designing a new chip for biomedical applications.
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Affiliation(s)
- Amelia Ahmad Khalili
- Department of Control and Mechatronic Engineering, Faculty of Electrical Engineering, Universiti Teknologi Malaysia, Skudai, Johor 81310, Malaysia.
| | - Mohd Ridzuan Ahmad
- Department of Control and Mechatronic Engineering, Faculty of Electrical Engineering, Universiti Teknologi Malaysia, Skudai, Johor 81310, Malaysia.
- Institute of Ibnu Sina, Universiti Teknologi Malaysia, Skudai, Johor 81310, Malaysia.
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119
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Phetsouphanh C, Zaunders JJ, Kelleher AD. Detecting Antigen-Specific T Cell Responses: From Bulk Populations to Single Cells. Int J Mol Sci 2015; 16:18878-93. [PMID: 26274954 PMCID: PMC4581277 DOI: 10.3390/ijms160818878] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 07/29/2015] [Accepted: 08/03/2015] [Indexed: 12/18/2022] Open
Abstract
A new generation of sensitive T cell-based assays facilitates the direct quantitation and characterization of antigen-specific T cell responses. Single-cell analyses have focused on measuring the quality and breadth of a response. Accumulating data from these studies demonstrate that there is considerable, previously-unrecognized, heterogeneity. Standard assays, such as the ICS, are often insufficient for characterization of rare subsets of cells. Enhanced flow cytometry with imaging capabilities enables the determination of cell morphology, as well as the spatial localization of the protein molecules within a single cell. Advances in both microfluidics and digital PCR have improved the efficiency of single-cell sorting and allowed multiplexed gene detection at the single-cell level. Delving further into the transcriptome of single-cells using RNA-seq is likely to reveal the fine-specificity of cellular events such as alternative splicing (i.e., splice variants) and allele-specific expression, and will also define the roles of new genes. Finally, detailed analysis of clonally related antigen-specific T cells using single-cell TCR RNA-seq will provide information on pathways of differentiation of memory T cells. With these state of the art technologies the transcriptomics and genomics of Ag-specific T cells can be more definitively elucidated.
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Affiliation(s)
| | - John James Zaunders
- Kirby Institute, University of New South Wales, 2031 Sydney, Australia.
- Centre for Applied Medical Research, St. Vincent's Hospital, 2010 Sydney, Australia.
| | - Anthony Dominic Kelleher
- Kirby Institute, University of New South Wales, 2031 Sydney, Australia.
- Centre for Applied Medical Research, St. Vincent's Hospital, 2010 Sydney, Australia.
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