1
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Breen L, Flynn J, Bergin A, Flampouri E, Butler M. Single cell analysis of Chinese hamster ovary cells during a bioprocess using a novel dynamic imaging system. Biotechnol Prog 2024:e3469. [PMID: 38613439 DOI: 10.1002/btpr.3469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 03/27/2024] [Accepted: 03/29/2024] [Indexed: 04/15/2024]
Abstract
Reliable monitoring of mammalian cells in bioreactors is essential to biopharmaceutical production. Trypan blue exclusion is a method of determining cell density and viability that has been used for over one hundred years to monitor cells in culture and is the current standard method in biomanufacturing. This method has many disadvantages however and there is a growing demand for more detailed and in-line measurements of cell growth in bioreactors. This article assesses a novel dynamic imaging system for single cell analysis. This data shows that comparable total cell density, viable cell density and percentage viability data shown here, generated by the imaging system, aligned well with conventional trypan blue counting methods for an industrially relevant Chinese Hamster Ovary (CHO) cell line. Furthermore, detailed statistical analysis shows that the classification system used by the PharmaFlow system can reveal trends of interest in monitoring the health of mammalian cells over a 6-day bioreactor culture. The system is also capable of sampling at-line, removing the necessity for taking samples off-line and enabling real time monitoring of cells in a bioreactor culture.
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Affiliation(s)
- Laura Breen
- Cell Technology Group, National Institute for Bioprocessing Research and Training (NIBRT), Blackrock, Co., Dublin, Ireland
| | - James Flynn
- Cell Technology Group, National Institute for Bioprocessing Research and Training (NIBRT), Blackrock, Co., Dublin, Ireland
| | - Adam Bergin
- Cell Technology Group, National Institute for Bioprocessing Research and Training (NIBRT), Blackrock, Co., Dublin, Ireland
- School of Chemical and Bioprocess Engineering, University College Dublin (UCD), Blackrock, Co., Dublin, Ireland
| | - Evangelia Flampouri
- Cell Technology Group, National Institute for Bioprocessing Research and Training (NIBRT), Blackrock, Co., Dublin, Ireland
| | - Michael Butler
- Cell Technology Group, National Institute for Bioprocessing Research and Training (NIBRT), Blackrock, Co., Dublin, Ireland
- School of Chemical and Bioprocess Engineering, University College Dublin (UCD), Blackrock, Co., Dublin, Ireland
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2
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Marcuccio F, Chau CC, Tanner G, Elpidorou M, Finetti MA, Ajaib S, Taylor M, Lascelles C, Carr I, Macaulay I, Stead LF, Actis P. Single-cell nanobiopsy enables multigenerational longitudinal transcriptomics of cancer cells. SCIENCE ADVANCES 2024; 10:eadl0515. [PMID: 38446884 PMCID: PMC10917339 DOI: 10.1126/sciadv.adl0515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 01/31/2024] [Indexed: 03/08/2024]
Abstract
Single-cell RNA sequencing has revolutionized our understanding of cellular heterogeneity, but routine methods require cell lysis and fail to probe the dynamic trajectories responsible for cellular state transitions, which can only be inferred. Here, we present a nanobiopsy platform that enables the injection of exogenous molecules and multigenerational longitudinal cytoplasmic sampling from a single cell and its progeny. The technique is based on scanning ion conductance microscopy (SICM) and, as a proof of concept, was applied to longitudinally profile the transcriptome of single glioblastoma (GBM) brain tumor cells in vitro over 72 hours. The GBM cells were biopsied before and after exposure to chemotherapy and radiotherapy, and our results suggest that treatment either induces or selects for more transcriptionally stable cells. We envision the nanobiopsy will contribute to transforming standard single-cell transcriptomics from a static analysis into a dynamic assay.
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Affiliation(s)
- Fabio Marcuccio
- Faculty of Medicine, Imperial College London, London, UK
- Bragg Centre for Materials Research, University of Leeds, Leeds, UK
- School of Electronic and Electrical Engineering, University of Leeds, Leeds, UK
- Leeds Institute of Medical Research at St James’s, University of Leeds, Leeds, UK
| | - Chalmers C. Chau
- Bragg Centre for Materials Research, University of Leeds, Leeds, UK
- School of Electronic and Electrical Engineering, University of Leeds, Leeds, UK
- Leeds Institute of Medical Research at St James’s, University of Leeds, Leeds, UK
| | - Georgette Tanner
- Leeds Institute of Medical Research at St James’s, University of Leeds, Leeds, UK
| | - Marilena Elpidorou
- School of Electronic and Electrical Engineering, University of Leeds, Leeds, UK
- Leeds Institute of Medical Research at St James’s, University of Leeds, Leeds, UK
| | - Martina A. Finetti
- Leeds Institute of Medical Research at St James’s, University of Leeds, Leeds, UK
| | - Shoaib Ajaib
- Leeds Institute of Medical Research at St James’s, University of Leeds, Leeds, UK
| | - Morag Taylor
- Leeds Institute of Medical Research at St James’s, University of Leeds, Leeds, UK
| | - Carolina Lascelles
- Leeds Institute of Medical Research at St James’s, University of Leeds, Leeds, UK
| | - Ian Carr
- Leeds Institute of Medical Research at St James’s, University of Leeds, Leeds, UK
| | - Iain Macaulay
- Earlham Institute, Norwich Research Park, Norwich, UK
| | - Lucy F. Stead
- Leeds Institute of Medical Research at St James’s, University of Leeds, Leeds, UK
| | - Paolo Actis
- Bragg Centre for Materials Research, University of Leeds, Leeds, UK
- School of Electronic and Electrical Engineering, University of Leeds, Leeds, UK
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3
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D M Campos C, Uning KT, Barmuta P, Markovic T, Yadav R, Mangraviti G, Ocket I, Van Roy W, Lagae L, Liu C. Use of high frequency electrorotation to identify cytoplasmic changes in cells non-disruptively. Biomed Microdevices 2023; 25:39. [PMID: 37801137 DOI: 10.1007/s10544-023-00677-9] [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] [Accepted: 09/12/2023] [Indexed: 10/07/2023]
Abstract
In this paper we demonstrate how the use of frequencies ranging from 50 kHz to 5 GHz in the analysis of cells by electrorotation can open the path to the identification of differences not detectable by conventional set-ups. Earlier works usually reported electrorotation devices operating below 20 MHz, limiting the response obtained to properties associated with the cell membrane. Those devices are thus unable to resolve the physiological properties in the cytoplasm. We used microwave-based technology to extend the frequency operation to 5 GHz. At high frequencies (from tens of MHz to GHz), the electromagnetic signal passes through the membrane and allows probing the cytoplasm. This enables several applications, such as cell classification, and viability analysis. Additionally, the use of conventional microfabrication techniques reduces the cost and complexity of analysis, compared to other non-invasive methods. We demonstrated the potential of this set-up by identifying two different populations of T-lymphocytes not distinguishable through visual assessment. We also assessed the effect of calcein on cell cytoplasmic properties and used it as a controlled experiment to demonstrate the possibility of this method to detect changes happening predominantly in the cytoplasm.
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Affiliation(s)
- Camila D M Campos
- imec, Kapeldreef 75, 3001, Leuven, Belgium.
- Department Electrical Engineering, KU Leuven, Kasteelpark Arenberg 10, 3001, Leuven, Belgium.
| | - Kevin T Uning
- imec, Kapeldreef 75, 3001, Leuven, Belgium
- Institute of Electrical and Micro Engineering, Ecole Polytechnique Federal de Lausanne, Route Cantonale, 1015, Lausanne, Switzerland
| | - Pawel Barmuta
- Department Electrical Engineering, KU Leuven, Kasteelpark Arenberg 10, 3001, Leuven, Belgium
| | - Tomislav Markovic
- Department Electrical Engineering, KU Leuven, Kasteelpark Arenberg 10, 3001, Leuven, Belgium
- Faculty of Electrical Engineering and Computing, University of Zagreb, Unska 3, 10000, Zagreb, Croatia
| | - Rahul Yadav
- imec, Kapeldreef 75, 3001, Leuven, Belgium
- imec OnePlanet Research Center, Bronland 10, 6708 WE, Wageningen, The Netherlands
| | | | - Ilja Ocket
- imec, Kapeldreef 75, 3001, Leuven, Belgium
| | | | - Liesbet Lagae
- imec, Kapeldreef 75, 3001, Leuven, Belgium
- Department Physics and Astronomy, KU Leuven, Celestijnenlaan 200d, 3001, Leuven, Belgium
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4
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Chu PY, Hsieh CH, Chen CY, Wu MH. Improvement of Background Solution for Optically Induced Dielectrophoresis-Based Cell Manipulation in a Microfluidic System. Front Bioeng Biotechnol 2021; 9:759205. [PMID: 34881232 PMCID: PMC8645848 DOI: 10.3389/fbioe.2021.759205] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Accepted: 11/04/2021] [Indexed: 11/25/2022] Open
Abstract
Optically induced dielectrophoresis (ODEP) is effective for cell manipulation. However, its utilization has been limited by the requirement of solution with low conductivity. This issue has been ignored in ODEP-relevant studies. To address this issue, this study aims to investigate to what extent the cell viability and performance of ODEP-based cell manipulation are affected by low conductivity conditions. Additionally, this study aims to modify sucrose solutions to reduce the impacts caused by low-conductivity solutions. Results revealed the use of sucrose solution in ODEP operation could significantly reduce the viability of the manipulated cells by 9.1 and 38.5% after 2- and 4-h incubation, respectively. Prolonged operation time (e.g., 4 h) in sucrose solution could lead to significantly inferior performance of cell manipulation, including 47.2% reduction of ODEP manipulation velocity and 44.4% loss of the cells manipulatable by ODEP. The key finding of this study is that the use of bovine serum albumin (BSA)-supplemented sucrose solution (conductivity: 25–50 μS cm−1) might significantly increase the cell viability by 10.9–14.8% compared with that in sucrose solution after 4 h incubation. Moreover, the ODEP manipulation velocity of cells in the BSA-supplemented sucrose solution (conductivity: 25 μS cm−1) was comparable to that in sucrose solution during 4-h incubation. More importantly, compared with sucrose solution, the use of BSA-supplemented sucrose solution (conductivity: 25–50 μS cm−1) contributed high percentage (80.4–93.5%) of the cells manipulatable by ODEP during 4-h incubation. Overall, this study has provided some fundamental information relevant to the improvement of background solutions for ODEP-based cell manipulation.
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Affiliation(s)
- Po-Yu Chu
- Ph.D. Program in Biomedical Engineering, Chang Gung University, Taoyuan City, Taiwan
| | - Chia-Hsun Hsieh
- Division of Hematology-Oncology, Department of Internal Medicine, New Taipei Municipal TuCheng Hospital, New Taipei City, Taiwan.,Division of Hematology-Oncology, Department of Internal Medicine, Chang Gung Memorial Hospital at Linkou, Taoyuan City, Taiwan.,Collage of Medicine, Chang Gung University, Taoyuan City, Taiwan
| | - Chih-Yu Chen
- Graduate Institute of Biomedical Engineering, Chang Gung University, Taoyuan City, Taiwan
| | - Min-Hsien Wu
- Ph.D. Program in Biomedical Engineering, Chang Gung University, Taoyuan City, Taiwan.,Division of Hematology-Oncology, Department of Internal Medicine, New Taipei Municipal TuCheng Hospital, New Taipei City, Taiwan.,Division of Hematology-Oncology, Department of Internal Medicine, Chang Gung Memorial Hospital at Linkou, Taoyuan City, Taiwan.,Graduate Institute of Biomedical Engineering, Chang Gung University, Taoyuan City, Taiwan.,Department of Chemical Engineering, Ming Chi University of Technology, New Taipei City, Taiwan
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5
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Liu Y, Wang K, Sun X, Chen D, Wang J, Chen J. Advance of microfluidic constriction channel system of measuring single-cell cortical tension/specific capacitance of membrane and conductivity of cytoplasm. Cytometry A 2021; 101:434-447. [PMID: 34821462 DOI: 10.1002/cyto.a.24517] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 10/14/2021] [Accepted: 11/11/2021] [Indexed: 12/29/2022]
Abstract
This paper reported a microfluidic platform which realized the characterization of inherent single-cell biomechanical and bioelectrical parameters simultaneously. Individual cells traveled through a constriction channel with deformation images and impedance variations captured and processed into cortical tension Tc , specific membrane capacitance Csm , and cytoplasmic conductivity σcy based on an equivalent biophysical model. These properties of thousands of individual cells of K562, Jurkat, HL-60, HL-60 treated with paraformaldehyde (PA)/cytochalasin D (CD)/concanavalin A (ConA), granulocytes of Donor 1, Donor 2, and Donor 3 were quantified for the first time. Leveraging Tc , Csm , and σcy , (1) high accuracies of classifying wild-type and processed HL-60 cells (e.g., 93.5% of PA treated vs. CD treated HL-60 cells) were realized, revealing the effectiveness of using these three biophysical parameters in cell-type classification; (2) low accuracies of classifying normal granulocytes from three donors (e.g., 56.4% of Donor 1 vs. 2), indicating comparable parameters for normal granulocytes. In conclusion, this platform can characterize single-cell Tc , Csm , and σcy concurrently and quantify multiple parameters in single-cell analysis.
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Affiliation(s)
- Yan Liu
- State Key Laboratory of Transducer Technology (SKLTT), Aerospace Information Research Institute (AIR), Chinese Academy of Sciences (CAS), Beijing, China.,School of Electronic, Electrical and Communication Engineering (EECE), University of Chinese Academy of Sciences (UCAS), Beijing, China
| | - Ke Wang
- School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing, China
| | - Xiaohao Sun
- Department of Mechanical Engineering, University of Colorado Boulder, Boulder, Colorado, USA
| | - Deyong Chen
- State Key Laboratory of Transducer Technology (SKLTT), Aerospace Information Research Institute (AIR), Chinese Academy of Sciences (CAS), Beijing, China.,School of Electronic, Electrical and Communication Engineering (EECE), University of Chinese Academy of Sciences (UCAS), Beijing, China.,School of Future Technology, University of Chinese Academy of Sciences (UCAS), Beijing, China
| | - Junbo Wang
- State Key Laboratory of Transducer Technology (SKLTT), Aerospace Information Research Institute (AIR), Chinese Academy of Sciences (CAS), Beijing, China.,School of Electronic, Electrical and Communication Engineering (EECE), University of Chinese Academy of Sciences (UCAS), Beijing, China.,School of Future Technology, University of Chinese Academy of Sciences (UCAS), Beijing, China
| | - Jian Chen
- State Key Laboratory of Transducer Technology (SKLTT), Aerospace Information Research Institute (AIR), Chinese Academy of Sciences (CAS), Beijing, China.,School of Electronic, Electrical and Communication Engineering (EECE), University of Chinese Academy of Sciences (UCAS), Beijing, China.,School of Future Technology, University of Chinese Academy of Sciences (UCAS), Beijing, China
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6
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Zhu S, Zhang X, Chen M, Tang D, Han Y, Xiang N, Ni Z. An easy-fabricated and disposable polymer-film microfluidic impedance cytometer for cell sensing. Anal Chim Acta 2021; 1175:338759. [PMID: 34330437 DOI: 10.1016/j.aca.2021.338759] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 05/14/2021] [Accepted: 06/10/2021] [Indexed: 11/27/2022]
Abstract
We report here an easy-fabricated and disposable polymer-film microfluidic impedance cytometer (PMIC) integrated with inertial focusing and parallel facing electrodes for cell sensing. The cells are first focused in an asymmetric serpentine channel, and then their impedance signals are measured when passing through the electrode region. The proposed PMIC device is the first impedance cytometer that is fabricated into a flexible sheet (with a thickness of 0.45 mm) by using the materials of commonly-available ITO-coated polymer films and double-sided adhesive tapes, the whole fabrication process is shortened from traditional 3-4 days to less than 5 min by using UV laser cutting. To verify the feasibility of our device for cell sensing, we explore the focusing behaviors of three differently sized particles and two types of tumor cells, and analyze their impedance signals. The results show that our device is capable of obtaining impedance information on numbers, diameters, and longitudinal positions of cells. We envision that our PMIC device is promising in label-free cell sensing owning to the advantages of low cost, small footprint, and simple fabrication.
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Affiliation(s)
- Shu Zhu
- School of Mechanical Engineering, And Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing, 211189, China
| | - Xiaozhe Zhang
- School of Mechanical Engineering, And Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing, 211189, China
| | - Mu Chen
- School of Mechanical Engineering, And Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing, 211189, China
| | - Dezhi Tang
- School of Mechanical Engineering, And Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing, 211189, China
| | - Yu Han
- School of Mechanical Engineering, And Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing, 211189, China
| | - Nan Xiang
- School of Mechanical Engineering, And Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing, 211189, China.
| | - Zhonghua Ni
- School of Mechanical Engineering, And Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing, 211189, China.
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7
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Zhu S, Zhang X, Zhou Z, Han Y, Xiang N, Ni Z. Microfluidic impedance cytometry for single-cell sensing: Review on electrode configurations. Talanta 2021; 233:122571. [PMID: 34215067 DOI: 10.1016/j.talanta.2021.122571] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/25/2021] [Accepted: 05/27/2021] [Indexed: 10/21/2022]
Abstract
Single-cell analysis has gained considerable attention for disease diagnosis, drug screening, and differentiation monitoring. Compared to the well-established flow cytometry, which uses fluorescent-labeled antibodies, microfluidic impedance cytometry (MIC) offers a simple, label-free, and noninvasive method for counting, classifying, and monitoring cells. Superior features including a small footprint, low reagent consumption, and ease of use have also been reported. The MIC device detects changes in the impedance signal caused by cells passing through the sensing/electric field zone, which can extract information regarding the size, shape, and dielectric properties of these cells. According to recent studies, electrode configuration has a remarkable effect on detection accuracy, sensitivity, and throughput. With the improvement in microfabrication technology, various electrode configurations have been reported for improving detection accuracy and throughput. However, the various electrode configurations of MIC devices have not been reviewed. In this review, the theoretical background of the impedance technique for single-cell analysis is introduced. Then, two-dimensional, three-dimensional, and liquid electrode configurations are discussed separately; their sensing mechanisms, fabrication processes, advantages, disadvantages, and applications are also described in detail. Finally, the current limitations and future perspectives of these electrode configurations are summarized. The main aim of this review is to offer a guide for researchers on the ongoing advancement in electrode configuration designs.
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Affiliation(s)
- Shu Zhu
- School of Mechanical Engineering, And Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing, 211189, China
| | - Xiaozhe Zhang
- School of Mechanical Engineering, And Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing, 211189, China
| | - Zheng Zhou
- School of Mechanical Engineering, And Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing, 211189, China
| | - Yu Han
- School of Mechanical Engineering, And Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing, 211189, China
| | - Nan Xiang
- School of Mechanical Engineering, And Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing, 211189, China.
| | - Zhonghua Ni
- School of Mechanical Engineering, And Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing, 211189, China.
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8
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Hakim KS, Lapizco-Encinas BH. Analysis of microorganisms with nonlinear electrokinetic microsystems. Electrophoresis 2021; 42:588-604. [PMID: 33151541 DOI: 10.1002/elps.202000233] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 10/04/2020] [Accepted: 11/02/2020] [Indexed: 02/06/2023]
Abstract
Nonlinear electrokinetics (EK), specifically electrophoresis of the second kind, dielectrophoresis (DEP) and electrorotation (EROT), have gained significant interest recently for their flexibility and labeless discriminant manner of operation. The current applications of these technologies are a clear advancement from what they were when first discovered, but also still show strong signs of future growth. The present review article presents a discussion of the current uses of microscale nonlinear EK technologies as analytical, sensing, and purification tools for microorganisms. The discussion is focused on some of the latest discoveries with various nonlinear EK microfluidic techniques, such as DEP particle trapping and EROT for particle assessments, for the analysis of microorganisms ranging from viruses to parasites. Along the way, special focus was given to key research articles from within the past two years to provide the most up-to-date knowledge on the current state-of-the-art within the field of microscale EK, and from there, an outlook on where the future of the field is headed is also included.
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Affiliation(s)
- Kel S Hakim
- Microscale Bioseparations Laboratory and Biomedical Engineering Department, Rochester Institute of Technology, Rochester, NY, USA
| | - Blanca H Lapizco-Encinas
- Microscale Bioseparations Laboratory and Biomedical Engineering Department, Rochester Institute of Technology, Rochester, NY, USA
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9
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Sintes GF, Bruckmaier RM, Wellnitz O. Nonsteroidal anti-inflammatory drugs affect the mammary epithelial barrier during inflammation. J Dairy Sci 2020; 103:10742-10753. [PMID: 32896404 DOI: 10.3168/jds.2020-18818] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 06/25/2020] [Indexed: 12/30/2022]
Abstract
During inflammation of the mammary gland, the blood-milk barrier, which is predominantly composed of mammary epithelial cells, loses its integrity and gradients between blood and milk cannot be maintained. Nonsteroidal anti-inflammatory drugs (NSAID) are commonly used systemically in combination with local administration of antimicrobials in mastitis treatments of dairy cows to improve the well-being of the cow during the disease. However, the knowledge about their effects on the blood-milk barrier is low. This study aimed to investigate effects of different NSAID, with different selectivity of cyclooxygenase-inhibition, on the transepithelial electrical resistance (TEER) and capacitance, cell viability, and expression of tumor necrosis factor α of bovine mammary epithelial barriers in vitro. Primary mammary epithelial cells of 3 different cows were challenged with lipopolysaccharide (LPS) from Escherichia coli with or without addition of ketoprofen (1.25 mg/mL or 4 mM), flunixin meglumine (1.0 mg/mL or 4 mM), meloxicam (0.25 mg/mL, 0.75 mg/mL, or 4 mM), diclofenac (0.75 mg/mL or 4 mM) or celecoxib (0.05 mg/mL) for 6 h. Concentrations were adapted to comparable relations of the recommended dosage for systemic application. Additionally, a similar molar concentration of all NSAID was used. Lipopolysaccharide with or without NSAID induced a decrease in TEER within 5 h, which returned to control level within 14 h. Viability of cells challenged with LPS only was not affected. However, the cell viability was decreased with increasing concentrations of NSAID and this effect was amplified with simultaneous LPS challenge. Ketoprofen at both dosages, flunixin meglumine at 1.0 mg/mL, and meloxicam at 0.75 mg/mL accelerated the recovery of TEER in comparison to LPS only (return to control level within 9 h). The comparison of NSAID effects at the same molecular quantity of 4 mM showed different effect on the barrier in which ketoprofen accelerated the recovery after LPS-induced barrier opening, whereas meloxicam and diclofenac slowed down the recovery (return to control level after 24 h). In conclusion, NSAID do not prevent the mammary epithelial barrier opening by LPS; however, ketoprofen, flunixin meglumine, and meloxicam obviously support the re-establishment of the barrier integrity. Used in mastitis therapy at an optimized dosage the tested NSAID would likely support the recovery of milk composition. However, an overdose of NSAID would likely cause tissue irritation and in turn, a delayed recovery of the barrier permeability.
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Affiliation(s)
- G F Sintes
- Veterinary Physiology, Vetsuisse Faculty, University of Bern, 3001 Bern, Switzerland
| | - R M Bruckmaier
- Veterinary Physiology, Vetsuisse Faculty, University of Bern, 3001 Bern, Switzerland
| | - O Wellnitz
- Veterinary Physiology, Vetsuisse Faculty, University of Bern, 3001 Bern, Switzerland.
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10
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Henslee EA. Review: Dielectrophoresis in cell characterization. Electrophoresis 2020; 41:1915-1930. [DOI: 10.1002/elps.202000034] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 05/31/2020] [Accepted: 07/14/2020] [Indexed: 12/23/2022]
Affiliation(s)
- Erin A. Henslee
- Department of Engineering Wake Forest University 455 Vine St. Winston‐Salem USA
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11
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Fazelkhah A, Afshar S, Durham N, Butler M, Salimi E, Bridges G, Thomson D. Parallel single‐cell optical transit dielectrophoresis cytometer. Electrophoresis 2020; 41:720-728. [DOI: 10.1002/elps.201900393] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 01/16/2020] [Accepted: 02/02/2020] [Indexed: 02/02/2023]
Affiliation(s)
- Azita Fazelkhah
- Department of Electrical and Computer EngineeringUniversity of Manitoba Winnipeg Canada
| | - Samaneh Afshar
- Department of Electrical and Computer EngineeringUniversity of Manitoba Winnipeg Canada
| | - Nicholas Durham
- Department of Electrical and Computer EngineeringFaculty of Applied ScienceUniversity of British Columbia Vancouver Canada
| | - Michael Butler
- National Institute for Bioprocessing Research and Training Dublin Ireland
| | - Elham Salimi
- Department of Electrical and Computer EngineeringUniversity of Manitoba Winnipeg Canada
| | - Greg Bridges
- Department of Electrical and Computer EngineeringUniversity of Manitoba Winnipeg Canada
| | - Douglas Thomson
- Department of Electrical and Computer EngineeringUniversity of Manitoba Winnipeg Canada
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12
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Fazelkhah A, Afshar S, Braasch K, Butler M, Salimi E, Bridges G, Thomson D. Cytoplasmic conductivity as a marker for bioprocess monitoring: Study of Chinese hamster ovary cells under nutrient deprivation and reintroduction. Biotechnol Bioeng 2019; 116:2896-2905. [DOI: 10.1002/bit.27115] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 06/28/2019] [Accepted: 07/04/2019] [Indexed: 12/31/2022]
Affiliation(s)
- Azita Fazelkhah
- Department of Electrical and Computer EngineeringUniversity of Manitoba Winnipeg Canada
| | - Samaneh Afshar
- Department of Electrical and Computer EngineeringUniversity of Manitoba Winnipeg Canada
| | - Katrin Braasch
- Department of MicrobiologyUniversity of Manitoba Winnipeg Canada
| | - Michael Butler
- National Institute for Bioprocessing Research and Training Dublin Ireland
| | - Elham Salimi
- Department of Electrical and Computer EngineeringUniversity of Manitoba Winnipeg Canada
| | - Greg Bridges
- Department of Electrical and Computer EngineeringUniversity of Manitoba Winnipeg Canada
| | - Douglas Thomson
- Department of Electrical and Computer EngineeringUniversity of Manitoba Winnipeg Canada
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