1
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Hughes MP, Clarke KSP, Hoque R, Griffiths OV, Kruchek EJ, Johnson MP, Tariq MH, Kohli N, Lewis R, Labeed FH. Label-free, non-contact determination of resting membrane potential using dielectrophoresis. Sci Rep 2024; 14:18477. [PMID: 39122771 PMCID: PMC11316104 DOI: 10.1038/s41598-024-69000-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Accepted: 07/30/2024] [Indexed: 08/12/2024] Open
Abstract
Measurement of cellular resting membrane potential (RMP) is important in understanding ion channels and their role in regulation of cell function across a wide range of cell types. However, methods available for the measurement of RMP (including patch clamp, microelectrodes, and potential-sensitive fluorophores) are expensive, slow, open to operator bias, and often result in cell destruction. We present non-contact, label-free membrane potential estimation which uses dielectrophoresis to determine the cytoplasm conductivity slope as a function of medium conductivity. By comparing this to patch clamp data available in the literature, we have demonstratet the accuracy of this approach using seven different cell types, including primary suspension cells (red blood cells, platelets), cultured suspension cells (THP-1), primary adherent cells (chondrocytes, human umbilical mesenchymal stem cells), and adherent (HeLa) and suspension (Jurkat) cancer cell lines. Analysis of the effect of ion channel inhibitors suggests the effects of pharmaceutical agents (TEA on HeLa; DMSO and neuraminidase on red blood cells) can also be measured. Comparison with published values of membrane potential suggest that the differences between our estimates and values recorded by patch clamp are accurate to within published margins of error. The method is low-cost, non-destructive, operator-independent and label-free, and has previously been shown to allow cells to be recovered after measurement.
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Affiliation(s)
- Michael Pycraft Hughes
- Department of Biomedical Engineering and Biotechnology, Khalifa University of Science and Technology, Abu Dhabi, UAE.
- Healthcare Engineering Innovation Center, Khalifa University of Science and Technology, Abu Dhabi, UAE.
| | - Krista S P Clarke
- Centre for Biomedical Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, UK
| | - Rashedul Hoque
- Centre for Biomedical Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, UK
| | - Oreoluwa V Griffiths
- Centre for Biomedical Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, UK
| | - Emily J Kruchek
- Centre for Biomedical Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, UK
| | - Matthew P Johnson
- Department of Biomedical Engineering and Biotechnology, Khalifa University of Science and Technology, Abu Dhabi, UAE
| | - Muhammad Hamza Tariq
- Department of Biomedical Engineering and Biotechnology, Khalifa University of Science and Technology, Abu Dhabi, UAE
| | - Nupur Kohli
- Department of Biomedical Engineering and Biotechnology, Khalifa University of Science and Technology, Abu Dhabi, UAE
- Healthcare Engineering Innovation Center, Khalifa University of Science and Technology, Abu Dhabi, UAE
| | - Rebecca Lewis
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, University of Surrey, Guildford, Surrey, GU2 7XH, UK
| | - Fatima H Labeed
- Department of Biology, United Arab Emirates University, Al Ain, UAE.
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2
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Aghajanloo B, Hadady H, Ejeian F, Inglis DW, Hughes MP, Tehrani AF, Nasr-Esfahani MH. Biomechanics of circulating cellular and subcellular bioparticles: beyond separation. Cell Commun Signal 2024; 22:331. [PMID: 38886776 PMCID: PMC11181607 DOI: 10.1186/s12964-024-01707-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Accepted: 06/07/2024] [Indexed: 06/20/2024] Open
Abstract
Biomechanical attributes have emerged as novel markers, providing a reliable means to characterize cellular and subcellular fractions. Numerous studies have identified correlations between these factors and patients' medical status. However, the absence of a thorough overview impedes their applicability in contemporary state-of-the-art therapeutic strategies. In this context, we provide a comprehensive analysis of the dimensions, configuration, rigidity, density, and electrical characteristics of normal and abnormal circulating cells. Subsequently, the discussion broadens to encompass subcellular bioparticles, such as extracellular vesicles (EVs) enriched either from blood cells or other tissues. Notably, cell sizes vary significantly, from 2 μm for platelets to 25 μm for circulating tumor cells (CTCs), enabling the development of size-based separation techniques, such as microfiltration, for specific diagnostic and therapeutic applications. Although cellular density is relatively constant among different circulating bioparticles, it allows for reliable density gradient centrifugation to isolate cells without altering their native state. Additionally, variations in EV surface charges (-6.3 to -45 mV) offer opportunities for electrophoretic and electrostatic separation methods. The distinctive mechanical properties of abnormal cells, compared to their normal counterparts, present an exceptional opportunity for diverse medical and biotechnological approaches. This review also aims to provide a holistic view of the current understanding of popular techniques in this domain that transcend conventional boundaries, focusing on early harvesting of malignant cells from body fluids, designing effective therapeutic options, cell targeting, and resonating with tissue and genetic engineering principles.
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Affiliation(s)
- Behrouz Aghajanloo
- Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, Iran
- Department of Animal Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
- Department of Science, Research and Technology (DISAT), Politecnico di Torino, Turin, Italy
- School of Engineering, Faculty of Science and Engineering, Macquarie University, Sydney, NSW, 2109, Australia
| | - Hanieh Hadady
- Department of Animal Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Fatemeh Ejeian
- Department of Animal Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran.
| | - David W Inglis
- School of Engineering, Faculty of Science and Engineering, Macquarie University, Sydney, NSW, 2109, Australia
| | - Michael Pycraft Hughes
- Department of Biomedical Engineering, Khalifa University, Abu Dhabi, United Arab Emirates
| | | | - Mohammad Hossein Nasr-Esfahani
- Department of Animal Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
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3
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Anastasiadi AT, Arvaniti VZ, Hudson KE, Kriebardis AG, Stathopoulos C, D’Alessandro A, Spitalnik SL, Tzounakas VL. Exploring unconventional attributes of red blood cells and their potential applications in biomedicine. Protein Cell 2024; 15:315-330. [PMID: 38270470 PMCID: PMC11074998 DOI: 10.1093/procel/pwae001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 01/08/2024] [Indexed: 01/26/2024] Open
Affiliation(s)
- Alkmini T Anastasiadi
- Department of Biochemistry, School of Medicine, University of Patras, 26504 Patras, Greece
| | - Vasiliki-Zoi Arvaniti
- Department of Biochemistry, School of Medicine, University of Patras, 26504 Patras, Greece
| | - Krystalyn E Hudson
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York City, NY 10032, USA
| | - Anastasios G Kriebardis
- Laboratory of Reliability and Quality Control in Laboratory Hematology (HemQcR), Department of Biomedical Sciences, School of Health & Caring Sciences, University of West Attica (UniWA), 12243 Egaleo, Greece
| | | | - Angelo D’Alessandro
- Department of Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, 13001 Aurora, CO, USA
| | - Steven L Spitalnik
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York City, NY 10032, USA
| | - Vassilis L Tzounakas
- Department of Biochemistry, School of Medicine, University of Patras, 26504 Patras, Greece
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4
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Rodan AR. Circadian Rhythm Regulation by Pacemaker Neuron Chloride Oscillation in Flies. Physiology (Bethesda) 2024; 39:0. [PMID: 38411570 PMCID: PMC11368518 DOI: 10.1152/physiol.00006.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 02/14/2024] [Accepted: 02/15/2024] [Indexed: 02/28/2024] Open
Abstract
Circadian rhythms in physiology and behavior sync organisms to external environmental cycles. Here, circadian oscillation in intracellular chloride in central pacemaker neurons of the fly, Drosophila melanogaster, is reviewed. Intracellular chloride links SLC12 cation-coupled chloride transporter function with kinase signaling and the regulation of inwardly rectifying potassium channels.
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Affiliation(s)
- Aylin R Rodan
- Molecular Medicine Program, University of Utah, Salt Lake City, Utah, United States
- Department of Internal Medicine, Division of Nephrology and Hypertension, University of Utah, Salt Lake City, Utah, United States
- Department of Human Genetics, University of Utah, Salt Lake City, Utah, United States
- Medical Service, Veterans Affairs Salt Lake City Health Care System, Salt Lake City, Utah, United States
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5
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Rodríguez SG, Crosby P, Hansen LL, Grünewald E, Beale AD, Spangler RK, Rabbitts BM, Partch CL, Stangherlin A, O’Neill JS, van Ooijen G. Potassium rhythms couple the circadian clock to the cell cycle. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.04.02.587153. [PMID: 38617352 PMCID: PMC11014554 DOI: 10.1101/2024.04.02.587153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
Circadian (~24 h) rhythms are a fundamental feature of life, and their disruption increases the risk of infectious diseases, metabolic disorders, and cancer1-6. Circadian rhythms couple to the cell cycle across eukaryotes7,8 but the underlying mechanism is unknown. We previously identified an evolutionarily conserved circadian oscillation in intracellular potassium concentration, [K+]i9,10. As critical events in the cell cycle are regulated by intracellular potassium11,12, an enticing hypothesis is that circadian rhythms in [K+]i form the basis of this coupling. We used a minimal model cell, the alga Ostreococcus tauri, to uncover the role of potassium in linking these two cycles. We found direct reciprocal feedback between [K+]i and circadian gene expression. Inhibition of proliferation by manipulating potassium rhythms was dependent on the phase of the circadian cycle. Furthermore, we observed a total inhibition of cell proliferation when circadian gene expression is inhibited. Strikingly, under these conditions a sudden enforced gradient of extracellular potassium was sufficient to induce a round of cell division. Finally, we provide evidence that interactions between potassium and circadian rhythms also influence proliferation in mammalian cells. These results establish circadian regulation of intracellular potassium levels as a primary factor coupling the cell- and circadian cycles across diverse organisms.
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Affiliation(s)
- Sergio Gil Rodríguez
- School of Biological Sciences, University of Edinburgh, Max Born Crescent EH9 3BF Edinburgh, United Kingdom
| | - Priya Crosby
- Department of Chemistry and Biochemistry, University of California Santa Cruz, Santa Cruz, CA, 95064, USA
| | - Louise L. Hansen
- School of Biological Sciences, University of Edinburgh, Max Born Crescent EH9 3BF Edinburgh, United Kingdom
| | - Ellen Grünewald
- School of Biological Sciences, University of Edinburgh, Max Born Crescent EH9 3BF Edinburgh, United Kingdom
| | - Andrew D. Beale
- UKRI MRC Laboratory of Molecular Biology, Francis Crick Ave, Cambridge, CB2 0QH, United Kingdom
| | - Rebecca K. Spangler
- Department of Chemistry and Biochemistry, University of California Santa Cruz, Santa Cruz, CA, 95064, USA
| | - Beverley M. Rabbitts
- Department of Chemistry and Biochemistry, University of California Santa Cruz, Santa Cruz, CA, 95064, USA
| | - Carrie L. Partch
- Department of Chemistry and Biochemistry, University of California Santa Cruz, Santa Cruz, CA, 95064, USA
| | - Alessandra Stangherlin
- Faculty of Medicine and University Hospital Cologne, Cluster of Excellence Cellular Stress Responses in Aging-associated Diseases (CECAD), Institute for Mitochondrial Diseases and Ageing, University of Cologne, Joseph-Stelzmann-Str, 50931, Cologne, Germany
| | - John S. O’Neill
- UKRI MRC Laboratory of Molecular Biology, Francis Crick Ave, Cambridge, CB2 0QH, United Kingdom
| | - Gerben van Ooijen
- School of Biological Sciences, University of Edinburgh, Max Born Crescent EH9 3BF Edinburgh, United Kingdom
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6
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Choi S, Woo SH, Park I, Lee S, Yeo KI, Lee SH, Lee SY, Yang S, Lee G, Chang WJ, Bashir R, Kim YS, Lee SW. Cellular subpopulations identified using an ensemble average of multiple dielectrophoresis measurements. Comput Biol Med 2024; 170:108011. [PMID: 38271838 DOI: 10.1016/j.compbiomed.2024.108011] [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: 10/08/2023] [Revised: 01/11/2024] [Accepted: 01/16/2024] [Indexed: 01/27/2024]
Abstract
While the average value measurement approach can successfully analyze and predict the general behavior and biophysical properties of an isogenic cell population, it fails when significant differences among individual cells are generated in the population by intracellular changes such as the cell cycle, or different cellular responses to certain stimuli. Detecting such single-cell differences in a cell population has remained elusive. Here, we describe an easy-to-implement and generalizable platform that measures the dielectrophoretic cross-over frequency of individual cells by decreasing measurement noise with a stochastic method and computing ensemble average statistics. This platform enables multiple, real-time, label-free detection of individual cells with significant dielectric variations over time within an isogenic cell population. Using a stochastic method in combination with the platform, we distinguished cell subpopulations from a mixture of drug-untreated and -treated isogenic cells. Furthermore, we demonstrate that our platform can identify drug-treated isogenic cells with different recovery rates.
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Affiliation(s)
- Seungyeop Choi
- Department of Biomedical Engineering, Yonsei University, Wonju, 26493, Republic of Korea; School of Biomedical Engineering, Korea University, Seoul, 02481, Republic of Korea; BK21 Four Institute of Precision Public Health, Korea University, Seoul, 02841, Republic of Korea
| | - Sung-Hun Woo
- Department of Biomedical Laboratory Science, Yonsei University, Wonju, 26493, Republic of Korea
| | - Insu Park
- Holonyak Micro and Nanotechnology Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA; Department of Biomedical Engineering, Konyang University, Daejeon, 35365, Republic of Korea
| | - Sena Lee
- Department of Precision Medicine, Wonju College of Medicine, Yonsei University, Wonju, 26426, Republic of Korea
| | - Kang In Yeo
- Department of Biomedical Engineering, Yonsei University, Wonju, 26493, Republic of Korea
| | - Sang Hyun Lee
- Department of Biomedical Engineering, Yonsei University, Wonju, 26493, Republic of Korea
| | - Sei Young Lee
- Department of Biomedical Engineering, Yonsei University, Wonju, 26493, Republic of Korea; Department of Medical Informatics and Biostatistics, Graduate School, Yonsei University, Wonju, 26426, Republic of Korea
| | - Sejung Yang
- Department of Precision Medicine, Wonju College of Medicine, Yonsei University, Wonju, 26426, Republic of Korea
| | - Gyudo Lee
- Department of Biotechnology and Bioinformatics, Korea University, Sejong, 30019, Republic of Korea; Interdisciplinary Graduate Program for Artificial Intelligence Smart Convergence Technology, Korea University, Sejong, 30019, Republic of Korea
| | - Woo-Jin Chang
- Mechanical Engineering Department, University of Wisconsin-Milwaukee, Milwaukee, WI, 53211, USA
| | - Rashid Bashir
- Holonyak Micro and Nanotechnology Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA; Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA; Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA; Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Yoon Suk Kim
- Department of Biomedical Laboratory Science, Yonsei University, Wonju, 26493, Republic of Korea.
| | - Sang Woo Lee
- Department of Biomedical Engineering, Yonsei University, Wonju, 26493, Republic of Korea.
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7
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Hughes MP. The cellular zeta potential: cell electrophysiology beyond the membrane. Integr Biol (Camb) 2024; 16:zyae003. [PMID: 38291769 DOI: 10.1093/intbio/zyae003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 12/16/2023] [Accepted: 01/06/2024] [Indexed: 02/01/2024]
Abstract
The standard model of the cell membrane potential Vm describes it as arising from diffusion currents across a membrane with a constant electric field, with zero electric field outside the cell membrane. However, the influence of Vm has been shown to extend into the extracellular space where it alters the cell's ζ-potential, the electrical potential measured a few nm from the cell surface which defines how the cell interacts with charged entities in its environment, including ions, molecules, and other cells. The paradigm arising from surface science is that the ζ-potential arises only from fixed membrane surface charge, and has consequently received little interest. However, if the ζ-potential can mechanistically and dynamically change by alteration of Vm, it allows the cell to dynamically alter cell-cell and cell-molecule interactions and may explain previously unexplained electrophysiological behaviours. Whilst the two potentials Vm and ζ are rarely reported together, they are occasionally described in different studies for the same cell type. By considering published data on these parameters across multiple cell types, as well as incidences of unexplained but seemingly functional Vm changes correlating with changes in cell behaviour, evidence is presented that this may play a functional role in the physiology of red blood cells, macrophages, platelets, sperm, ova, bacteria and cancer. Understanding how these properties will improve understanding of the role of electrical potentials and charges in the regulation of cell function and in the way in which cells interact with their environment. Insight The zeta (ζ) potential is the electrical potential a few nm beyond the surface of any suspensoid in water. Whilst typically assumed to arise only from fixed charges on the cell surface, recent and historical evidence shows a strong link to the cell's membrane potential Vm, which the cell can alter mechanistically through the use of ion channels. Whilst these two potentials have rarely been studied simultaneously, this review collates data across multiple studies reporting Vm, ζ-potential, electrical properties of changes in cell behaviour. Collectively, this points to Vm-mediated ζ-potential playing a significant role in the physiology and activity of blood cells, immune response, developmental biology and egg fertilization, and cancer among others.
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Affiliation(s)
- Michael Pycraft Hughes
- Department of Biomedical Engineering/Healthcare Engineering Innovation Centre (HEIC), Khalifa University, Abu Dhabi, UAE
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8
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Oladokun R, Adekanmbi EO, An V, Gangavaram I, Srivastava SK. Dielectrophoretic profiling of erythrocytes to study the impacts of metabolic stress, temperature, and storage duration utilizing a point-and-planar microdevice. Sci Rep 2023; 13:17281. [PMID: 37828082 PMCID: PMC10570315 DOI: 10.1038/s41598-023-44022-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 10/03/2023] [Indexed: 10/14/2023] Open
Abstract
Dielectrophoresis (DEP) is widely utilized for trapping and sorting various types of cells, including live and dead cells and healthy and infected cells. This article focuses on the dielectric characterization of erythrocytes (red blood cells or RBCs) by quantifying DEP crossover frequency using a novel point-and-planar microwell device platform. Numerical simulations using COMSOL Multiphysics software demonstrate that the distribution of the DEP force is influenced by factors such as the shape of the point electrode, spacing between the point and planar electrodes, and the type of bioparticle being investigated. The dependency on electrode spacing is experimentally evaluated by analyzing the DEP crossover response of erythrocytes. Furthermore, the results are validated against the traditional electrical characterization technique called electrorotation, which typically requires laborious fabrication and operation using quadrupole electrodes. Other significant factors, including erythrocyte storage age and the changes in cell properties over time since collection, osmolarity, and temperature, are also assessed to determine the optimal conditions for erythrocyte characterization. The findings indicate a significant difference between fresh and stored erythrocyte samples (up to 4 days), highlighting the importance of maintaining an isotonic medium for cell storage.
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Affiliation(s)
- Raphael Oladokun
- Department of Chemical and Biomedical Engineering, West Virginia University, 1306 Evansdale Dr., PO Box 6102, Morgantown, WV, 26506-6102, USA
| | | | - Vanessa An
- Summer 2022 High School Intern, Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, WV, USA
| | - Isha Gangavaram
- Summer 2022 High School Intern, Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, WV, USA
| | - Soumya K Srivastava
- Department of Chemical and Biomedical Engineering, West Virginia University, 1306 Evansdale Dr., PO Box 6102, Morgantown, WV, 26506-6102, USA.
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9
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Beale AD, Hayter EA, Crosby P, Valekunja UK, Edgar RS, Chesham JE, Maywood ES, Labeed FH, Reddy AB, Wright KP, Lilley KS, Bechtold DA, Hastings MH, O'Neill JS. Mechanisms and physiological function of daily haemoglobin oxidation rhythms in red blood cells. EMBO J 2023; 42:e114164. [PMID: 37554073 PMCID: PMC10548169 DOI: 10.15252/embj.2023114164] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/16/2023] [Accepted: 07/16/2023] [Indexed: 08/10/2023] Open
Abstract
Cellular circadian rhythms confer temporal organisation upon physiology that is fundamental to human health. Rhythms are present in red blood cells (RBCs), the most abundant cell type in the body, but their physiological function is poorly understood. Here, we present a novel biochemical assay for haemoglobin (Hb) oxidation status which relies on a redox-sensitive covalent haem-Hb linkage that forms during SDS-mediated cell lysis. Formation of this linkage is lowest when ferrous Hb is oxidised, in the form of ferric metHb. Daily haemoglobin oxidation rhythms are observed in mouse and human RBCs cultured in vitro, or taken from humans in vivo, and are unaffected by mutations that affect circadian rhythms in nucleated cells. These rhythms correlate with daily rhythms in core body temperature, with temperature lowest when metHb levels are highest. Raising metHb levels with dietary sodium nitrite can further decrease daytime core body temperature in mice via nitric oxide (NO) signalling. These results extend our molecular understanding of RBC circadian rhythms and suggest they contribute to the regulation of body temperature.
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Affiliation(s)
| | - Edward A Hayter
- Centre for Biological Timing, Faculty of Biology, Medicine and HealthUniversity of ManchesterManchesterUK
| | - Priya Crosby
- MRC Laboratory of Molecular BiologyCambridgeUK
- Present address:
Department of Chemistry and BiochemistryUniversity of California, Santa CruzSanta CruzCAUSA
| | - Utham K Valekunja
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPAUSA
- Institute for Translational Medicine and Therapeutics, Perelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPAUSA
| | - Rachel S Edgar
- Department of Infectious DiseasesImperial College LondonLondonUK
| | | | | | - Fatima H Labeed
- Faculty of Engineering and Physical SciencesUniversity of SurreyGuildfordUK
| | - Akhilesh B Reddy
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPAUSA
- Institute for Translational Medicine and Therapeutics, Perelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPAUSA
| | - Kenneth P Wright
- Department of Integrative Physiology, Sleep and Chronobiology LaboratoryUniversity of Colorado BoulderBoulderCOUSA
| | - Kathryn S Lilley
- Cambridge Centre for Proteomics, Department of BiochemistryUniversity of CambridgeCambridgeUK
| | - David A Bechtold
- Centre for Biological Timing, Faculty of Biology, Medicine and HealthUniversity of ManchesterManchesterUK
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10
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Chen H, Osman SY, Moose DL, Vanneste M, Anderson JL, Henry MD, Anand RK. Quantification of capture efficiency, purity, and single-cell isolation in the recovery of circulating melanoma cells from peripheral blood by dielectrophoresis. LAB ON A CHIP 2023; 23:2586-2600. [PMID: 37185977 PMCID: PMC10228177 DOI: 10.1039/d2lc01113a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 03/31/2023] [Indexed: 05/17/2023]
Abstract
This paper describes a dielectrophoretic method for selection of circulating melanoma cells (CMCs), which lack reliable identifying surface antigens and are extremely rare in blood. This platform captures CMCs individually by dielectrophoresis (DEP) at an array of wireless bipolar electrodes (BPEs) aligned to overlying nanoliter-scale chambers, which isolate each cell for subsequent on-chip single-cell analysis. To determine the best conditions to employ for CMC isolation in this DEP-BPE platform, the static and dynamic dielectrophoretic response of established melanoma cell lines, melanoma cells from patient-derived xenografts (PDX) and peripheral blood mononuclear cells (PBMCs) were evaluated as a function of frequency using two established DEP platforms. Further, PBMCs derived from patients with advanced melanoma were compared with those from healthy controls. The results of this evaluation reveal that each DEP method requires a distinct frequency to achieve capture of melanoma cells and that the distribution of dielectric properties of PBMCs is more broadly varied in and among patients versus healthy controls. Based on this evaluation, we conclude that 50 kHz provides the highest capture efficiency on our DEP-BPE platform while maintaining a low rate of capture of unwanted PBMCs. We further quantified the efficiency of single-cell capture on the DEP-BPE platform and found that the efficiency diminished beyond around 25% chamber occupancy, thereby informing the minimum array size that is required. Importantly, the capture efficiency of the DEP-BPE platform for melanoma cells when using optimized conditions matched the performance predicted by our analysis. Finally, isolation of melanoma cells from contrived (spike-in) and clinical samples on our platform using optimized conditions was demonstrated. The capture and individual isolation of CMCs, confirmed by post-capture labeling, from patient-derived samples suggests the potential of this platform for clinical application.
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Affiliation(s)
- Han Chen
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA.
| | - Sommer Y Osman
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA.
| | - Devon L Moose
- Departments of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA 52242, USA
| | - Marion Vanneste
- Departments of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA 52242, USA
| | - Jared L Anderson
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA.
| | - Michael D Henry
- Departments of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA 52242, USA
- Pathology, Urology and Radiation Oncology, University of Iowa, Iowa City, IA 52242, USA
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA 52242, USA
| | - Robbyn K Anand
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA.
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11
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Stangherlin A. Ion dynamics and the regulation of circadian cellular physiology. Am J Physiol Cell Physiol 2023; 324:C632-C643. [PMID: 36689675 DOI: 10.1152/ajpcell.00378.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Circadian rhythms in physiology and behavior allow organisms to anticipate the daily environmental changes imposed by the rotation of our planet around its axis. Although these rhythms eventually manifest at the organismal level, a cellular basis for circadian rhythms has been demonstrated. Significant contributors to these cell-autonomous rhythms are daily cycles in gene expression and protein translation. However, recent data revealed cellular rhythms in other biological processes, including ionic currents, ion transport, and cytosolic ion abundance. Circadian rhythms in ion currents sustain circadian variation in action potential firing rate, which coordinates neuronal behavior and activity. Circadian regulation of metal ions abundance and dynamics is implicated in distinct cellular processes, from protein translation to membrane activity and osmotic homeostasis. In turn, studies showed that manipulating ion abundance affects the expression of core clock genes and proteins, suggestive of a close interplay. However, the relationship between gene expression cycles, ion dynamics, and cellular function is still poorly characterized. In this review, I will discuss the mechanisms that generate ion rhythms, the cellular functions they govern, and how they feed back to regulate the core clock machinery.
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Affiliation(s)
- Alessandra Stangherlin
- Faculty of Medicine and University Hospital Cologne, Cluster of Excellence Cellular Stress Responses in Aging-associated Diseases (CECAD), Institute for Mitochondrial Diseases and Ageing, University of Cologne, Cologne, Germany
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12
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Sudsiri CJ, Ritchie RJ. Influence of Na+ disorder on cytoplasmic conductivity and cellular electromagnetic (EM) energy absorption of human erythrocytes (PONE-D-21-36089). PLoS One 2023; 18:e0277044. [PMID: 36821542 PMCID: PMC9949639 DOI: 10.1371/journal.pone.0277044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 10/18/2022] [Indexed: 02/24/2023] Open
Abstract
Cytoplasmic conductivity of human erythrocytes may be significantly disturbed by the composition of the external suspending media. Effects of external NaCl on cytoplasmic conductivity of human erythrocyte (Human Red Blood Cells, HRBC) were investigated in a simple NaCl system. Using thermodynamic theory cytoplasmic conductivities could be calculated from internal [K+], [Na+], [Cl-] and [HCO3-]. Effect of cell volume and cell water changes were introduced and allowed for using the Debye-Hückel-Onsager relation and Walden's rule of viscosity. Cell volume and cell water change of HRBCs were measured in suspending isotonic solutions with conductivities from 0.50 S m-1 up to hypertonic solutions of conductivity of 2.02 S m-1 at selected temperatures of 25°C (standard benchmark temperature) and 37°C (physiological temperature). In isotonic solutions, cytoplasmic conductivity of human erythrocyte decreases with rise in the external media ionic concentration and vice versa for hypertonic solutions. The HRBC is capable of rapidly regulating its volume (and shape) over quite a wide range of osmolality. Specific Absorption Rate (SAR, 900 MHz) values (W kg-1) of electromagnetic radiation are below safe limits at non-physiological 25°C but above legal limits at 37°C [National Council on Radiation Protection and Measurements, NCRP]. However, at 37°C under both hypertonic [Na+] and isotonic but low [Na+], SAR increases further beyond legal limits.
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Affiliation(s)
- Chadapust J. Sudsiri
- Department of Industrial Management, Faculty of Sciences and Industrial Technology, Prince of Songkla University, Suratthani, Thailand
| | - Raymond J. Ritchie
- Biotechnology of Electromechanics Research Unit, Faculty of Technology and Environment, Prince of Songkla University, Kathu, Phuket, Thailand
- * E-mail: ,
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13
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Tiwari A, Rathor P, Trivedi PK, Ch R. Multi-Omics Reveal Interplay between Circadian Dysfunction and Type2 Diabetes. BIOLOGY 2023; 12:301. [PMID: 36829576 PMCID: PMC9953493 DOI: 10.3390/biology12020301] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 02/06/2023] [Accepted: 02/09/2023] [Indexed: 02/16/2023]
Abstract
Type 2 diabetes is one of the leading threats to human health in the 21st century. It is a metabolic disorder characterized by a dysregulated glucose metabolism resulting from impaired insulin secretion or insulin resistance. More recently, accumulated epidemiological and animal model studies have confirmed that circadian dysfunction caused by shift work, late meal timing, and sleep loss leads to type 2 diabetes. Circadian rhythms, 24-h endogenous biological oscillations, are a fundamental feature of nearly all organisms and control many physiological and cellular functions. In mammals, light synchronizes brain clocks and feeding is a main stimulus that synchronizes the peripheral clocks in metabolic tissues, such as liver, pancreas, muscles, and adipose tissues. Circadian arrhythmia causes the loss of synchrony of the clocks of these metabolic tissues and leads to an impaired pancreas β-cell metabolism coupled with altered insulin secretion. In addition to these, gut microbes and circadian rhythms are intertwined via metabolic regulation. Omics approaches play a significant role in unraveling how a disrupted circadian metabolism causes type 2 diabetes. In the present review, we emphasize the discoveries of several genes, proteins, and metabolites that contribute to the emergence of type 2 diabetes mellitus (T2D). The implications of these discoveries for comprehending the circadian clock network in T2D may lead to new therapeutic solutions.
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Affiliation(s)
- Ashutosh Tiwari
- Metabolomics Lab, CSIR-Central Institute of Medicinal & Aromatic Plants (CIMAP), Lucknow 226015, India
| | - Priya Rathor
- Metabolomics Lab, CSIR-Central Institute of Medicinal & Aromatic Plants (CIMAP), Lucknow 226015, India
| | - Prabodh Kumar Trivedi
- Department of Biotechnology, CSIR-Central Institute of Medicinal & Aromatic Plants (CIMAP), Lucknow 226015, India
- Academy of Council of Scientific and Industrial Research (ACSIR), Gaziabad 201002, India
| | - Ratnasekhar Ch
- Metabolomics Lab, CSIR-Central Institute of Medicinal & Aromatic Plants (CIMAP), Lucknow 226015, India
- Academy of Council of Scientific and Industrial Research (ACSIR), Gaziabad 201002, India
- School of Biological Sciences, Queen’s University Belfast, Belfast BT9 5DL, UK
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14
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Choi S, Park I, Lee SH, Yeo KI, Min G, Woo SH, Kim YS, Lee SY, Lee SW. On-Chip Single-Cell Bioelectrical Analysis for Identification of Cell Electrical Phenotyping in Response to Sequential Electric Signal Modulation. BIOSENSORS 2022; 12:1037. [PMID: 36421154 PMCID: PMC9688586 DOI: 10.3390/bios12111037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 11/12/2022] [Accepted: 11/12/2022] [Indexed: 06/16/2023]
Abstract
In recent years, an interesting biomarker called membrane breakdown voltage has been examined using artificial planar lipid bilayers. Even though they have great potential to identify cell electrical phenotyping for distinguishing similar cell lines or cells under different physiological conditions, the biomarker has not been evaluated in the context of living cell electrical phenotyping. Herein, we present a single-cell analysis platform to continuously measure the electric response in a large number of cells in parallel using electric frequency and voltage variables. Using this platform, we measured the direction of cell displacement and transparent cell image alteration as electric polarization of the cell responds to signal modulation, extracting the dielectrophoretic crossover frequency and membrane breakdown voltage for each cell, and utilizing the measurement results in the same spatiotemporal environment. We developed paired parameters using the dielectrophoretic crossover frequency and membrane breakdown voltage for each cell and evaluated the paired parameter efficiency concerning the identification of two different breast cancer cells and cell drug response. Moreover, we showed that the platform was able to identify cell electrical phenotyping, which was generated by subtle changes in cholesterol depletion-induced cell membrane integrity disruption when the paired parameter was used. Our platform introduced in this paper is extremely useful for facilitating more accurate and efficient evaluation of cell electrical phenotyping in a variety of applications, such as cell biology and drug discovery.
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Affiliation(s)
- Seungyeop Choi
- Department of Biomedical Engineering, Yonsei University, Wonju 26493, Republic of Korea
| | - Insu Park
- Holonyak Micro and Nanotechnology Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Department of Biomedical Engineering, Konyang University, Daejeon 35365, Republic of Korea
| | - Sang Hyun Lee
- Department of Biomedical Engineering, Yonsei University, Wonju 26493, Republic of Korea
| | - Kang In Yeo
- Department of Biomedical Engineering, Yonsei University, Wonju 26493, Republic of Korea
| | - Gyeongjun Min
- Department of Biomedical Engineering, Yonsei University, Wonju 26493, Republic of Korea
| | - Sung-Hun Woo
- Department of Biomedical Laboratory Science, Yonsei University, Wonju 26493, Republic of Korea
| | - Yoon Suk Kim
- Department of Biomedical Laboratory Science, Yonsei University, Wonju 26493, Republic of Korea
| | - Sei Young Lee
- Department of Biomedical Engineering, Yonsei University, Wonju 26493, Republic of Korea
| | - Sang Woo Lee
- Department of Biomedical Engineering, Yonsei University, Wonju 26493, Republic of Korea
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15
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Labeed FH, Beale AD, Schneider P, Kitcatt SJ, Kruchek EJ, Reece SE. Circadian rhythmicity in murine blood: Electrical effects of malaria infection and anemia. Front Bioeng Biotechnol 2022; 10:994487. [PMID: 36440448 PMCID: PMC9686327 DOI: 10.3389/fbioe.2022.994487] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 10/27/2022] [Indexed: 11/11/2022] Open
Abstract
Circadian rhythms are biological adaptations to the day-night cycle, whereby cells adapt to changes in the external environment or internal physiology according to the time of day. Whilst many cellular clock mechanisms involve gene expression feedback mechanisms, clocks operate even where gene expression is absent. For example, red blood cells (RBCs) do not have capacity for gene expression, and instead possess an electrophysiological oscillator where cytosolic potassium plays a key role in timekeeping. We examined murine blood under normal conditions as well as in two perturbed states, malaria infection and induced anemia, to assess changes in baseline cellular electrophysiology and its implications for the electrophysiological oscillator. Blood samples were analyzed at 4-h intervals over 2 days by dielectrophoresis, and microscopic determination of parasitemia. We found that cytoplasmic conductivity (indicating the concentration of free ions in the cytoplasm and related to the membrane potential) exhibited circadian rhythmic behavior in all three cases (control, malaria and anemia). Compared to control samples, cytoplasm conductivity was decreased in the anemia group, whilst malaria-infected samples were in antiphase to control. Furthermore, we identified rhythmic behavior in membrane capacitance of malaria infected cells that was not replicated in the other samples. Finally, we reveal the historically famous rhythmicity of malaria parasite replication is in phase with cytoplasm conductivity. Our findings suggest the electrophysiological oscillator can impact on malaria parasite replication and/or is vulnerable to perturbation by rhythmic parasite activities.
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Affiliation(s)
- Fatima H. Labeed
- Centre for Biomedical Engineering, University of Surrey, Guildford, United Kingdom,*Correspondence: Fatima H. Labeed,
| | - Andrew D. Beale
- Centre for Biomedical Engineering, University of Surrey, Guildford, United Kingdom
| | - Petra Schneider
- Institute of Ecology and Evolution, University of Edinburgh, Edinburgh, United Kingdom
| | - Stephen J. Kitcatt
- Centre for Biomedical Engineering, University of Surrey, Guildford, United Kingdom
| | - Emily J. Kruchek
- Centre for Biomedical Engineering, University of Surrey, Guildford, United Kingdom
| | - Sarah E. Reece
- Institute of Ecology and Evolution, University of Edinburgh, Edinburgh, United Kingdom
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16
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Hughes MP, Fry CH, Labeed FH. Cytoplasmic anion/cation imbalances applied across the membrane capacitance may form a significant component of the resting membrane potential of red blood cells. Sci Rep 2022; 12:15005. [PMID: 36056086 PMCID: PMC9440063 DOI: 10.1038/s41598-022-19316-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 08/26/2022] [Indexed: 11/24/2022] Open
Abstract
Electrical aspects of cell function manifest in many ways. The most widely studied is the cell membrane potential, Vm, but others include the conductance and capacitance of the membrane, the conductance of the enclosed cytoplasm, as well as the charge at the cell surface (an electrical double layer) producing an extracellular electrical potential, the ζ-potential. Empirical relationships have been identified between many of these, but not the mechanisms that link them all. Here we examine relationships between Vm and the electrical conductivities of both the cytoplasm and extracellular media, using data from a suspensions of red blood cells. We have identified linear relationships between extracellular medium conductivity, cytoplasm conductivity and Vm. This is in contrast to the standard model of a resting membrane potential which describes a logarithmic relationship between Vm and the concentration of permeable ions in the extracellular medium. The model here suggests that Vm is partially electrostatic in origin, arising from a charge imbalance at an inner electrical double-layer, acting across the membrane and double-layer capacitances to produce a voltage. This model describes an origin for coupling between Vm and ζ, by which cells can alter their electrostatic relationship with their environment, with implications for modulation of membrane ion transport, adhesion of proteins such as antibodies and wider cell-cell interactions.
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Affiliation(s)
- Michael Pycraft Hughes
- Department of Biomedical Engineering, Khalifa University, Abu Dhabi, United Arab Emirates.
- Centre for Biomedical Engineering, University of Surrey, Guildford, GU2 7XH, Surrey, UK.
| | - Christopher H Fry
- School of Physiology, Pharmacology and Neuroscience, University of Bristol, Bristol, BS8 1TD, UK
| | - Fatima H Labeed
- Centre for Biomedical Engineering, University of Surrey, Guildford, GU2 7XH, Surrey, UK
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17
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Hughes MP, Kruchek EJ, Gibbins JM, Griffiths OV, Abdal B, Labeed FH. The Platelet Electrome: Evidence for a Role in Regulation of Function and Surface Interaction. Bioelectricity 2022. [DOI: 10.1089/bioe.2021.0044] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Affiliation(s)
- Michael Pycraft Hughes
- Centre for Biomedical Engineering, University of Surrey, Guildford, United Kingdom
- Department of Biomedical Engineering, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Emily J. Kruchek
- Centre for Biomedical Engineering, University of Surrey, Guildford, United Kingdom
| | - Jonathan M. Gibbins
- Institute for Cardiovascular and Metabolic Research, School of Biological Sciences, University of Reading, Reading, United Kingdom
| | | | - Bader Abdal
- Centre for Biomedical Engineering, University of Surrey, Guildford, United Kingdom
| | - Fatima H. Labeed
- Centre for Biomedical Engineering, University of Surrey, Guildford, United Kingdom
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18
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Güldür T. Potential linkages between circadian rhythm and membrane lipids: timekeeper and bilayer. BIOL RHYTHM RES 2022. [DOI: 10.1080/09291016.2022.2096756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Tayfun Güldür
- Medical Biochemistry Department, Faculty of Medicine, Inönü University, Malatya, Turkey
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19
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Martin C, Johnston JD, Henslee EA, van der Veen DR, Labeed FH. In vitro
characterisation of murine pre‐adipose nucleated cells reveals electrophysiological cycles associated with biological clocks. Electrophoresis 2022; 43:1337-1346. [PMID: 35543378 PMCID: PMC9323421 DOI: 10.1002/elps.202100308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 03/05/2022] [Accepted: 03/10/2022] [Indexed: 11/12/2022]
Affiliation(s)
- Capucine Martin
- Chronobiology Section School of Biosciences and Medicine Faculty of Health and Medical Sciences University of Surrey Guildford UK
| | - Jonathan D. Johnston
- Chronobiology Section School of Biosciences and Medicine Faculty of Health and Medical Sciences University of Surrey Guildford UK
| | - Erin A. Henslee
- Centre for Biomedical Engineering School of Mechanical Engineering Sciences Faculty of Engineering and Physical Sciences University of Surrey Guildford UK
- Department of Engineering Wake Forest University Winston‐Salem North Carolina USA
| | - Daan R. van der Veen
- Chronobiology Section School of Biosciences and Medicine Faculty of Health and Medical Sciences University of Surrey Guildford UK
| | - Fatima H. Labeed
- Centre for Biomedical Engineering School of Mechanical Engineering Sciences Faculty of Engineering and Physical Sciences University of Surrey Guildford UK
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20
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Lavi ED, Crivellari F, Gagnon Z. Dielectrophoretic detection of electrical property changes of stored human red blood cells. Electrophoresis 2022; 43:1297-1308. [DOI: 10.1002/elps.202100241] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 12/21/2021] [Accepted: 01/04/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Edwin D. Lavi
- Department of Chemical Engineering Texas A&M University College Station Texas USA
| | | | - Zachary Gagnon
- Department of Chemical Engineering Texas A&M University College Station Texas USA
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21
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Ren B, Yu Y, Poopal RK, Qiao L, Ren B, Ren Z. IR-Based Novel Device for Real-Time Online Acquisition of Fish Heart ECG Signals. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:4262-4271. [PMID: 35258949 DOI: 10.1021/acs.est.1c07732] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
We developed an infrared (IR)-based real-time online monitoring device (US Patent No: US 10,571,448 B2) to quantify heart electrocardiogram (ECG) signals to assess the water quality based on physiological changes in fish. The device is compact, allowing us to monitor cardiac function for an extended period (from 7 to 30 days depending on the rechargeable battery capacity) without function injury and disturbance of swimming activity. The electrode samples and the biopotential amplifier and microcontroller process the cardiac-electrical signals. An infrared transceiver transmits denoised electrocardiac signals to complete the signal transmission. The infrared receiver array and biomedical acquisition signal processing system send signals to the computer. The software in the computer processes the data in real time. We quantified ECG indexes (P-wave, Q-wave, R-wave, S-wave, T-wave, PR-interval, QRS-complex, and QT-interval) of carp precisely and incessantly under the different experimental setup (CuSO4 and deltamethrin). The ECG cue responses were chemical-specific based on CuSO4 and deltamethrin exposures. This study provides an additional technology for noninvasive water quality surveillance.
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Affiliation(s)
- Baixiang Ren
- Institute of Environment and Ecology, Shandong Normal University, 250358 Jinan, China
| | - Yaxin Yu
- Institute of Environment and Ecology, Shandong Normal University, 250358 Jinan, China
| | - Rama-Krishnan Poopal
- Institute of Environment and Ecology, Shandong Normal University, 250358 Jinan, China
| | - Linlin Qiao
- Institute of Environment and Ecology, Shandong Normal University, 250358 Jinan, China
| | - Baichuan Ren
- Institute of Environment and Ecology, Shandong Normal University, 250358 Jinan, China
| | - Zongming Ren
- Institute of Environment and Ecology, Shandong Normal University, 250358 Jinan, China
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22
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Alvarez-Dominguez JR, Melton DA. Cell maturation: Hallmarks, triggers, and manipulation. Cell 2022; 185:235-249. [PMID: 34995481 PMCID: PMC8792364 DOI: 10.1016/j.cell.2021.12.012] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 12/03/2021] [Accepted: 12/10/2021] [Indexed: 02/06/2023]
Abstract
How cells become specialized, or "mature," is important for cell and developmental biology. While maturity is usually deemed a terminal fate, it may be more helpful to consider maturation not as a switch but as a dynamic continuum of adaptive phenotypic states set by genetic and environment programing. The hallmarks of maturity comprise changes in anatomy (form, gene circuitry, and interconnectivity) and physiology (function, rhythms, and proliferation) that confer adaptive behavior. We discuss efforts to harness their chemical (nutrients, oxygen, and growth factors) and physical (mechanical, spatial, and electrical) triggers in vitro and in vivo and how maturation strategies may support disease research and regenerative medicine.
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Affiliation(s)
- Juan R. Alvarez-Dominguez
- Department of Cell and Developmental Biology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Douglas A. Melton
- Department of Stem Cell and Regenerative Biology, Harvard Stem Cell Institute, Harvard University, Cambridge, MA 02138, USA
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23
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Wong DCS, Seinkmane E, Zeng A, Stangherlin A, Rzechorzek NM, Beale AD, Day J, Reed M, Peak‐Chew SY, Styles CT, Edgar RS, Putker M, O’Neill JS. CRYPTOCHROMES promote daily protein homeostasis. EMBO J 2022; 41:e108883. [PMID: 34842284 PMCID: PMC8724739 DOI: 10.15252/embj.2021108883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 11/07/2021] [Accepted: 11/09/2021] [Indexed: 11/29/2022] Open
Abstract
The daily organisation of most mammalian cellular functions is attributed to circadian regulation of clock-controlled protein expression, driven by daily cycles of CRYPTOCHROME-dependent transcriptional feedback repression. To test this, we used quantitative mass spectrometry to compare wild-type and CRY-deficient fibroblasts under constant conditions. In CRY-deficient cells, we found that temporal variation in protein, phosphopeptide, and K+ abundance was at least as great as wild-type controls. Most strikingly, the extent of temporal variation within either genotype was much smaller than overall differences in proteome composition between WT and CRY-deficient cells. This proteome imbalance in CRY-deficient cells and tissues was associated with increased susceptibility to proteotoxic stress, which impairs circadian robustness, and may contribute to the wide-ranging phenotypes of CRY-deficient mice. Rather than generating large-scale daily variation in proteome composition, we suggest it is plausible that the various transcriptional and post-translational functions of CRY proteins ultimately act to maintain protein and osmotic homeostasis against daily perturbation.
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Affiliation(s)
| | | | - Aiwei Zeng
- MRC Laboratory of Molecular BiologyCambridgeUK
| | | | | | | | - Jason Day
- Department of Earth SciencesUniversity of CambridgeCambridgeUK
| | - Martin Reed
- MRC Laboratory of Molecular BiologyCambridgeUK
| | | | | | - Rachel S Edgar
- Department of Infectious DiseasesImperial CollegeLondonUK
| | - Marrit Putker
- MRC Laboratory of Molecular BiologyCambridgeUK
- Present address:
Crown BioscienceUtrechtthe Netherlands
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24
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Beale AD, Labeed FH, Kitcatt SJ, O'Neill JS. Detecting Circadian Rhythms in Human Red Blood Cells by Dielectrophoresis. Methods Mol Biol 2022. [PMID: 35610432 DOI: 10.1007/978-1-0716-2249-0_17/figures/5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
Abstract
Dielectrophoresis (DEP) enables the measurement of population-level electrophysiology in many cell types by examining their interaction with an externally applied electric field. Here we describe the application of DEP to the measurement of circadian rhythms in a non-nucleated cell type, the human red blood cell. Using DEP, population-level electrophysiology of ~20,000 red blood cells can be measured from start to finish in less than 3 min, and can be repeated over several days to reveal cell-autonomous daily regulation of membrane electrophysiology. This method is amenable to the characterization of circadian rhythms by altering entrainment and free-run conditions or through pharmacological perturbation.
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Affiliation(s)
| | - Fatima H Labeed
- School of Mechanical Engineering Sciences, University of Surrey, Guildford, UK
| | - Stephen J Kitcatt
- School of Mechanical Engineering Sciences, University of Surrey, Guildford, UK
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25
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Beale AD, Labeed FH, Kitcatt SJ, O'Neill JS. Detecting Circadian Rhythms in Human Red Blood Cells by Dielectrophoresis. Methods Mol Biol 2022; 2482:255-264. [PMID: 35610432 DOI: 10.1007/978-1-0716-2249-0_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Dielectrophoresis (DEP) enables the measurement of population-level electrophysiology in many cell types by examining their interaction with an externally applied electric field. Here we describe the application of DEP to the measurement of circadian rhythms in a non-nucleated cell type, the human red blood cell. Using DEP, population-level electrophysiology of ~20,000 red blood cells can be measured from start to finish in less than 3 min, and can be repeated over several days to reveal cell-autonomous daily regulation of membrane electrophysiology. This method is amenable to the characterization of circadian rhythms by altering entrainment and free-run conditions or through pharmacological perturbation.
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Affiliation(s)
| | - Fatima H Labeed
- School of Mechanical Engineering Sciences, University of Surrey, Guildford, UK
| | - Stephen J Kitcatt
- School of Mechanical Engineering Sciences, University of Surrey, Guildford, UK
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26
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Multi-Modal Regulation of Circadian Physiology by Interactive Features of Biological Clocks. BIOLOGY 2021; 11:biology11010021. [PMID: 35053019 PMCID: PMC8772734 DOI: 10.3390/biology11010021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 12/21/2021] [Accepted: 12/23/2021] [Indexed: 12/26/2022]
Abstract
The circadian clock is a fundamental biological timing mechanism that generates nearly 24 h rhythms of physiology and behaviors, including sleep/wake cycles, hormone secretion, and metabolism. Evolutionarily, the endogenous clock is thought to confer living organisms, including humans, with survival benefits by adapting internal rhythms to the day and night cycles of the local environment. Mirroring the evolutionary fitness bestowed by the circadian clock, daily mismatches between the internal body clock and environmental cycles, such as irregular work (e.g., night shift work) and life schedules (e.g., jet lag, mistimed eating), have been recognized to increase the risk of cardiac, metabolic, and neurological diseases. Moreover, increasing numbers of studies with cellular and animal models have detected the presence of functional circadian oscillators at multiple levels, ranging from individual neurons and fibroblasts to brain and peripheral organs. These oscillators are tightly coupled to timely modulate cellular and bodily responses to physiological and metabolic cues. In this review, we will discuss the roles of central and peripheral clocks in physiology and diseases, highlighting the dynamic regulatory interactions between circadian timing systems and multiple metabolic factors.
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27
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Forsberg M, Olsson M, Seth H, Wasling P, Zetterberg H, Hedner J, Hanse E. Ion concentrations in cerebrospinal fluid in wakefulness, sleep and sleep deprivation in healthy humans. J Sleep Res 2021; 31:e13522. [PMID: 34787340 DOI: 10.1111/jsr.13522] [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: 06/09/2021] [Revised: 10/04/2021] [Accepted: 11/05/2021] [Indexed: 12/01/2022]
Abstract
Sleep is controlled by a circadian rhythmicity, via a reduction of arousal-promoting neuromodulatory activity, and by accumulation of somnogenic factors in the interstitial fluid of the brain. Recent experiments in mice suggest that a reduced neuronal excitability caused by a reduced concentration of potassium in the brain, concomitant with an increased concentration of calcium and magnesium, constitutes an important mediator of sleep. In the present study, we examined whether such changes in ion concentrations could be detected in the cerebrospinal fluid of healthy humans. Each subject underwent cerebrospinal fluid collection at three occasions in a randomized order: at 15:00 hours-17:00 hours during waking, at 06:00 hours-07:00 hours immediately following 1 night of sleep, and at 06:00 hours-07:00 hours following 1 night of sleep deprivation. When compared with wakefulness, both sleep and sleep deprivation produced the same effect of a small (0.1 mm, about 3%), but robust and highly significant, reduction in potassium concentration. Calcium and magnesium concentrations were unchanged. Our results support a circadian modulation of neuronal excitability in the brain mediated via changes of the interstitial potassium concentration.
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Affiliation(s)
- My Forsberg
- Department of Physiology, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Martin Olsson
- Department of Internal Medicine, Center for Sleep and Vigilance Disorders, University of Gothenburg, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Henrik Seth
- Department of Physiology, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Pontus Wasling
- Department of Clinical Neuroscience, The Sahlgrenska Academy, University of Gothenburg, Mölndal, Sweden
| | - Henrik Zetterberg
- Department of Psychiatry and Neurochemistry, The Sahlgrenska Academy, University of Gothenburg, Mölndal, Sweden.,Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden.,UCL Institute of Neurology, Queen Square, London, UK.,The Dementia Research Institute at UCL, London, UK.,Hong Kong Center for Neurodegenerative Diseases, Hong Kong, China
| | - Jan Hedner
- Department of Internal Medicine, Center for Sleep and Vigilance Disorders, University of Gothenburg, Sahlgrenska University Hospital, Gothenburg, Sweden.,Sleep Laboratory, Pulmonary Medicine, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Eric Hanse
- Department of Physiology, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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28
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Krahmer J, Hindle M, Perby LK, Mogensen HK, Nielsen TH, Halliday KJ, VanOoijen G, LeBihan T, Millar AJ. The circadian clock gene circuit controls protein and phosphoprotein rhythms in Arabidopsis thaliana. Mol Cell Proteomics 2021; 21:100172. [PMID: 34740825 PMCID: PMC8733343 DOI: 10.1016/j.mcpro.2021.100172] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 09/27/2021] [Accepted: 11/01/2021] [Indexed: 11/29/2022] Open
Abstract
Twenty-four-hour, circadian rhythms control many eukaryotic mRNA levels, whereas the levels of their more stable proteins are not expected to reflect the RNA rhythms, emphasizing the need to test the circadian regulation of protein abundance and modification. Here we present circadian proteomic and phosphoproteomic time series from Arabidopsis thaliana plants under constant light conditions, estimating that just 0.4% of quantified proteins but a much larger proportion of quantified phospho-sites were rhythmic. Approximately half of the rhythmic phospho-sites were most phosphorylated at subjective dawn, a pattern we term the “phospho-dawn.” Members of the SnRK/CDPK family of protein kinases are candidate regulators. A CCA1-overexpressing line that disables the clock gene circuit lacked most circadian protein phosphorylation. However, the few phospho-sites that fluctuated despite CCA1-overexpression still tended to peak in abundance close to subjective dawn, suggesting that the canonical clock mechanism is necessary for most but perhaps not all protein phosphorylation rhythms. To test the potential functional relevance of our datasets, we conducted phosphomimetic experiments using the bifunctional enzyme fructose-6-phosphate-2-kinase/phosphatase (F2KP), as an example. The rhythmic phosphorylation of diverse protein targets is controlled by the clock gene circuit, implicating posttranslational mechanisms in the transmission of circadian timing information in plants. Circadian (phospho)proteomics time courses of plants with or without functional clock. Most protein abundance/phosphorylation rhythms require a transcriptional oscillator. The majority of rhythmic phosphosites peak around subjective dawn (“phospho-dawn”). A phosphorylated serine of the metabolic enzyme F2KP has functional relevance.
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Affiliation(s)
- Johanna Krahmer
- SynthSys and School of Biological Sciences, CH Waddington Building, Max Born Crescent, Kings Buildings, University of Edinburgh, Edinburgh, EH9 3BF, United Kingdom; Institute for Molecular Plant Science, School of Biological Sciences, Daniel Rutherford Building, Building, Max Born Crescent, Kings Buildings, University of Edinburgh, Edinburgh, EH9 3BF, United Kingdom.
| | - Matthew Hindle
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, Easter Bush, Edinburgh, EH25 9RG, United Kingdom
| | - Laura K Perby
- Department of Plant and Environmental Sciences, University of Copenhagen, Section for Molecular Plant Biology, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
| | - Helle K Mogensen
- Department of Plant and Environmental Sciences, University of Copenhagen, Section for Molecular Plant Biology, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
| | - Tom H Nielsen
- Department of Plant and Environmental Sciences, University of Copenhagen, Section for Molecular Plant Biology, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
| | - Karen J Halliday
- Institute for Molecular Plant Science, School of Biological Sciences, Daniel Rutherford Building, Building, Max Born Crescent, Kings Buildings, University of Edinburgh, Edinburgh, EH9 3BF, United Kingdom
| | - Gerben VanOoijen
- Institute for Molecular Plant Science, School of Biological Sciences, Daniel Rutherford Building, Building, Max Born Crescent, Kings Buildings, University of Edinburgh, Edinburgh, EH9 3BF, United Kingdom
| | - Thierry LeBihan
- SynthSys and School of Biological Sciences, CH Waddington Building, Max Born Crescent, Kings Buildings, University of Edinburgh, Edinburgh, EH9 3BF, United Kingdom
| | - Andrew J Millar
- SynthSys and School of Biological Sciences, CH Waddington Building, Max Born Crescent, Kings Buildings, University of Edinburgh, Edinburgh, EH9 3BF, United Kingdom.
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29
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Compensatory ion transport buffers daily protein rhythms to regulate osmotic balance and cellular physiology. Nat Commun 2021; 12:6035. [PMID: 34654800 PMCID: PMC8520019 DOI: 10.1038/s41467-021-25942-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 08/04/2021] [Indexed: 01/15/2023] Open
Abstract
Between 6-20% of the cellular proteome is under circadian control and tunes mammalian cell function with daily environmental cycles. For cell viability, and to maintain volume within narrow limits, the daily variation in osmotic potential exerted by changes in the soluble proteome must be counterbalanced. The mechanisms and consequences of this osmotic compensation have not been investigated before. In cultured cells and in tissue we find that compensation involves electroneutral active transport of Na+, K+, and Cl- through differential activity of SLC12A family cotransporters. In cardiomyocytes ex vivo and in vivo, compensatory ion fluxes confer daily variation in electrical activity. Perturbation of soluble protein abundance has commensurate effects on ion composition and cellular function across the circadian cycle. Thus, circadian regulation of the proteome impacts ion homeostasis with substantial consequences for the physiology of electrically active cells such as cardiomyocytes.
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30
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Hughes MP, Kruchek EJ, Beale AD, Kitcatt SJ, Qureshi S, Trott ZP, Charbonnel O, Agbaje PA, Henslee EA, Dorey RA, Lewis R, Labeed FH. V m-related extracellular potentials observed in red blood cells. Sci Rep 2021; 11:19446. [PMID: 34593849 PMCID: PMC8484267 DOI: 10.1038/s41598-021-98102-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 08/25/2021] [Indexed: 11/16/2022] Open
Abstract
Even in nonexcitable cells, the membrane potential Vm is fundamental to cell function, with roles from ion channel regulation, development, to cancer metastasis. Vm arises from transmembrane ion concentration gradients; standard models assume homogeneous extracellular and intracellular ion concentrations, and that Vm only exists across the cell membrane and has no significance beyond it. Using red blood cells, we show that this is incorrect, or at least incomplete; Vm is detectable beyond the cell surface, and modulating Vm produces quantifiable and consistent changes in extracellular potential. Evidence strongly suggests this is due to capacitive coupling between Vm and the electrical double layer, rather than molecular transporters. We show that modulating Vm changes the extracellular ion composition, mimicking the behaviour if voltage-gated ion channels in non-excitable channels. We also observed Vm-synchronised circadian rhythms in extracellular potential, with significant implications for cell–cell interactions and cardiovascular disease.
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Affiliation(s)
- Michael Pycraft Hughes
- Centre for Biomedical Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, UK.
| | - Emily J Kruchek
- Centre for Biomedical Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, UK
| | - Andrew D Beale
- Centre for Biomedical Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, UK.,MRC Laboratory for Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Stephen J Kitcatt
- Centre for Biomedical Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, UK
| | - Sara Qureshi
- Centre for Biomedical Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, UK
| | - Zachary P Trott
- Centre for Biomedical Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, UK
| | - Oriane Charbonnel
- Centre for Biomedical Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, UK.,School of Engineering, École Centrale de Lyon, 36 Avenue Guy de Collongue, 69134, Écully, France
| | - Paul A Agbaje
- Centre for Biomedical Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, UK
| | - Erin A Henslee
- Centre for Biomedical Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, UK.,Department of Engineering, Wake Forest University, 55 Vine St, Wake Downtown, Winston-Salem, NC, 27109, USA
| | - Robert A Dorey
- Centre for Biomedical Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, UK
| | - Rebecca Lewis
- School of Veterinary Medicine, University of Surrey, Guildford, Surrey, GU2 7XH, UK
| | - Fatima H Labeed
- Centre for Biomedical Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, UK
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31
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Kay H, Grünewald E, Feord HK, Gil S, Peak-Chew SY, Stangherlin A, O'Neill JS, van Ooijen G. Deep-coverage spatiotemporal proteome of the picoeukaryote Ostreococcus tauri reveals differential effects of environmental and endogenous 24-hour rhythms. Commun Biol 2021; 4:1147. [PMID: 34593975 PMCID: PMC8484446 DOI: 10.1038/s42003-021-02680-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 09/07/2021] [Indexed: 11/18/2022] Open
Abstract
The cellular landscape changes dramatically over the course of a 24 h day. The proteome responds directly to daily environmental cycles and is additionally regulated by the circadian clock. To quantify the relative contribution of diurnal versus circadian regulation, we mapped proteome dynamics under light:dark cycles compared with constant light. Using Ostreococcus tauri, a prototypical eukaryotic cell, we achieved 85% coverage, which allowed an unprecedented insight into the identity of proteins that facilitate rhythmic cellular functions. The overlap between diurnally- and circadian-regulated proteins was modest and these proteins exhibited different phases of oscillation between the two conditions. Transcript oscillations were generally poorly predictive of protein oscillations, in which a far lower relative amplitude was observed. We observed coordination between the rhythmic regulation of organelle-encoded proteins with the nuclear-encoded proteins that are targeted to organelles. Rhythmic transmembrane proteins showed a different phase distribution compared with rhythmic soluble proteins, indicating the existence of a circadian regulatory process specific to the biogenesis and/or degradation of membrane proteins. Our observations argue that the cellular spatiotemporal proteome is shaped by a complex interaction between intrinsic and extrinsic regulatory factors through rhythmic regulation at the transcriptional as well as post-transcriptional, translational, and post-translational levels. Holly Kay, Ellen Grünewald, et al. provide an in-depth examination of the proteome in the eukaryotic green alga, Ostreococcus tauri, under circadian constant light or cycling diurnal light-dark conditions. They observe that there is little overlap between mRNA and protein expression rhythms, or the diurnal and circadian proteome, suggesting that the cellular spatiotemporal proteome is shaped through rhythmic regulation at multiple stages of transcription and translation.
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Affiliation(s)
- Holly Kay
- School of Biological Sciences, University of Edinburgh, Max Born Crescent, Edinburgh, EH9 3BF, UK
| | - Ellen Grünewald
- School of Biological Sciences, University of Edinburgh, Max Born Crescent, Edinburgh, EH9 3BF, UK
| | - Helen K Feord
- School of Biological Sciences, University of Edinburgh, Max Born Crescent, Edinburgh, EH9 3BF, UK
| | - Sergio Gil
- School of Biological Sciences, University of Edinburgh, Max Born Crescent, Edinburgh, EH9 3BF, UK
| | - Sew Y Peak-Chew
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | | | - John S O'Neill
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Gerben van Ooijen
- School of Biological Sciences, University of Edinburgh, Max Born Crescent, Edinburgh, EH9 3BF, UK.
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32
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Li MD, Xin H, Yuan Y, Yang X, Li H, Tian D, Zhang H, Zhang Z, Han TL, Chen Q, Duan G, Ju D, Chen K, Deng F, He W. Circadian Clock-Controlled Checkpoints in the Pathogenesis of Complex Disease. Front Genet 2021; 12:721231. [PMID: 34557221 PMCID: PMC8452875 DOI: 10.3389/fgene.2021.721231] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Accepted: 08/16/2021] [Indexed: 12/26/2022] Open
Abstract
The circadian clock coordinates physiology, metabolism, and behavior with the 24-h cycles of environmental light. Fundamental mechanisms of how the circadian clock regulates organ physiology and metabolism have been elucidated at a rapid speed in the past two decades. Here we review circadian networks in more than six organ systems associated with complex disease, which cluster around metabolic disorders, and seek to propose critical regulatory molecules controlled by the circadian clock (named clock-controlled checkpoints) in the pathogenesis of complex disease. These include clock-controlled checkpoints such as circadian nuclear receptors in liver and muscle tissues, chemokines and adhesion molecules in the vasculature. Although the progress is encouraging, many gaps in the mechanisms remain unaddressed. Future studies should focus on devising time-dependent strategies for drug delivery and engagement in well-characterized organs such as the liver, and elucidating fundamental circadian biology in so far less characterized organ systems, including the heart, blood, peripheral neurons, and reproductive systems.
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Affiliation(s)
- Min-Dian Li
- Department of Cardiology and the Center for Circadian Metabolism and Cardiovascular Disease, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Haoran Xin
- Department of Cardiology and the Center for Circadian Metabolism and Cardiovascular Disease, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Yinglin Yuan
- Medical Center of Hematology, The Xinqiao Hospital of Army Medical University, Chongqing, China
| | - Xinqing Yang
- Department of Anesthesiology, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Hongli Li
- Department of Obstetrics and Gynaecology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Dingyuan Tian
- Department of Cardiology and the Center for Circadian Metabolism and Cardiovascular Disease, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Hua Zhang
- Department of Obstetrics and Gynaecology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Zhihui Zhang
- Department of Cardiology and the Center for Circadian Metabolism and Cardiovascular Disease, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Ting-Li Han
- Department of Obstetrics and Gynaecology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Qing Chen
- Key Lab of Medical Protection for Electromagnetic Radiation, Ministry of Education of China, Institute of Toxicology, College of Preventive Medicine, Army Medical University (Third Military Medical University), Chongqing, China
| | - Guangyou Duan
- Department of Anesthesiology, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Dapeng Ju
- Department of Anesthesiology, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Ka Chen
- Research Center for Nutrition and Food Safety, Institute of Military Preventive Medicine, Army Medical University, Chongqing, China
| | - Fang Deng
- Key Laboratory of Extreme Environmental Medicine, Department of Pathophysiology, College of High Altitude Military Medicine, Ministry of Education of China, Army Medical University (Third Military Medical University), Chongqing, China.,Key Laboratory of High Altitude Medicine, PLA, Army Medical University (Third Military Medical University), Chongqing, China
| | - Wenyan He
- Department of Dermatology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
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33
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Dielectrophoresis as a Tool to Reveal the Potential Role of Ion Channels and Early Electrophysiological Changes in Osteoarthritis. MICROMACHINES 2021; 12:mi12080949. [PMID: 34442571 PMCID: PMC8402151 DOI: 10.3390/mi12080949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 07/30/2021] [Accepted: 08/08/2021] [Indexed: 11/16/2022]
Abstract
Diseases such as osteoarthritis (OA) are commonly characterized at the molecular scale by gene expression and subsequent protein production; likewise, the effects of pharmaceutical interventions are typically characterized by the effects of molecular interactions. However, these phenomena are usually preceded by numerous precursor steps, many of which involve significant ion influx or efflux. As a consequence, rapid assessment of cell electrophysiology could play a significant role in unravelling the mechanisms underlying drug interactions and progression of diseases, such as OA. In this study, we used dielectrophoresis (DEP), a technique that allows rapid, label-free determination of the dielectric parameters to assess the role of potassium ions on the dielectric characteristics of chondrocytes, and to investigate the electrophysiological differences between healthy chondrocytes and those from an in vitro arthritic disease model. Our results showed that DEP was able to detect a significant decrease in membrane conductance (6191 ± 738 vs. 8571 ± 1010 S/m2), membrane capacitance (10.3 ± 1.47 vs. 14.5 ± 0.01 mF/m2), and whole cell capacitance (5.4 ± 0.7 vs. 7.5 ± 0.3 pF) following inhibition of potassium channels using 10 mM tetraethyl ammonium, compared to untreated healthy chondrocytes. Moreover, cells from the OA model had a different response to DEP force in comparison to healthy cells; this was seen in terms of both a decreased membrane conductivity (782 S/m2 vs. 1139 S/m2) and a higher whole cell capacitance (9.58 ± 3.4 vs. 3.7 ± 1.3 pF). The results show that DEP offers a high throughput method, capable of detecting changes in membrane electrophysiological properties and differences between disease states.
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34
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Matta C, Lewis R, Fellows C, Diszhazi G, Almassy J, Miosge N, Dixon J, Uribe MC, May S, Poliska S, Barrett-Jolley R, Fodor J, Szentesi P, Hajdú T, Keller-Pinter A, Henslee E, Labeed FH, Hughes MP, Mobasheri A. Transcriptome-based screening of ion channels and transporters in a migratory chondroprogenitor cell line isolated from late-stage osteoarthritic cartilage. J Cell Physiol 2021; 236:7421-7439. [PMID: 34008188 DOI: 10.1002/jcp.30413] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 04/28/2021] [Accepted: 05/04/2021] [Indexed: 12/13/2022]
Abstract
Chondrogenic progenitor cells (CPCs) may be used as an alternative source of cells with potentially superior chondrogenic potential compared to mesenchymal stem cells (MSCs), and could be exploited for future regenerative therapies targeting articular cartilage in degenerative diseases such as osteoarthritis (OA). In this study, we hypothesised that CPCs derived from OA cartilage may be characterised by a distinct channelome. First, a global transcriptomic analysis using Affymetrix microarrays was performed. We studied the profiles of those ion channels and transporter families that may be relevant to chondroprogenitor cell physiology. Following validation of the microarray data with quantitative reverse transcription-polymerase chain reaction, we examined the role of calcium-dependent potassium channels in CPCs and observed functional large-conductance calcium-activated potassium (BK) channels involved in the maintenance of the chondroprogenitor phenotype. In line with our very recent results, we found that the KCNMA1 gene was upregulated in CPCs and observed currents that could be attributed to the BK channel. The BK channel inhibitor paxilline significantly inhibited proliferation, increased the expression of the osteogenic transcription factor RUNX2, enhanced the migration parameters, and completely abolished spontaneous Ca2+ events in CPCs. Through characterisation of their channelome we demonstrate that CPCs are a distinct cell population but are highly similar to MSCs in many respects. This study adds key mechanistic data to the in-depth characterisation of CPCs and their phenotype in the context of cartilage regeneration.
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Affiliation(s)
- Csaba Matta
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.,Department of Veterinary Preclinical Sciences, School of Veterinary Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
| | - Rebecca Lewis
- Department of Veterinary Preclinical Sciences, School of Veterinary Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
| | - Christopher Fellows
- Department of Veterinary Preclinical Sciences, School of Veterinary Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
| | - Gyula Diszhazi
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Janos Almassy
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Nicolai Miosge
- Department of Prosthodontics, Tissue Regeneration Work Group, Georg August University, Göttingen, Germany
| | - James Dixon
- Wolfson Centre for Stem Cells, Tissue Engineering and Modelling, Centre of Biomolecular Sciences, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - Marcos C Uribe
- The Nottingham Arabidopsis Stock Centre (NASC), School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, UK
| | - Sean May
- The Nottingham Arabidopsis Stock Centre (NASC), School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, UK
| | - Szilard Poliska
- Genomic Medicine and Bioinformatic Core Facility, Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Richard Barrett-Jolley
- Department of Musculoskeletal Biology, Faculty of Health and Life Sciences, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, UK
| | - Janos Fodor
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Peter Szentesi
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Tibor Hajdú
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Aniko Keller-Pinter
- Department of Biochemistry, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Erin Henslee
- Department of Mechanical Engineering Sciences, Centre for Biomedical Engineering, University of Surrey, Guildford, UK
| | - Fatima H Labeed
- Department of Mechanical Engineering Sciences, Centre for Biomedical Engineering, University of Surrey, Guildford, UK
| | - Michael P Hughes
- Department of Mechanical Engineering Sciences, Centre for Biomedical Engineering, University of Surrey, Guildford, UK
| | - Ali Mobasheri
- Department of Regenerative Medicine, State Research Institute Centre for Innovative Medicine, Vilnius, Lithuania.,Research Unit of Medical Imaging, Physics and Technology, Faculty of Medicine, University of Oulu, Oulu, Finland.,Departments of Orthopedics, Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht, The Netherlands.,Department of Joint Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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35
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Peroxiredoxins couple metabolism and cell division in an ultradian cycle. Nat Chem Biol 2021; 17:477-484. [PMID: 33574615 DOI: 10.1038/s41589-020-00728-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 12/22/2020] [Indexed: 01/30/2023]
Abstract
Redox cycles have been reported in ultradian, circadian and cell cycle-synchronized systems. Redox cycles persist in the absence of transcription and cyclin-CDK activity, indicating that cells harbor multiple coupled oscillators. Nonetheless, the causal relationships and molecular mechanisms by which redox cycles are embedded within ultradian, circadian or cell division cycles remain largely elusive. Yeast harbor an ultradian oscillator, the yeast metabolic cycle (YMC), which comprises metabolic/redox cycles, transcriptional cycles and synchronized cell division. Here, we reveal the existence of robust cycling of H2O2 and peroxiredoxin oxidation during the YMC and show that peroxiredoxin inactivation disrupts metabolic cycling and abolishes coupling with cell division. We find that thiol-disulfide oxidants and reductants predictably modulate the switching between different YMC metabolic states, which in turn predictably perturbs cell cycle entry and exit. We propose that oscillatory H2O2-dependent protein thiol oxidation is a key regulator of metabolic cycling and its coordination with cell division.
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36
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Parnell AA, De Nobrega AK, Lyons LC. Translating around the clock: Multi-level regulation of post-transcriptional processes by the circadian clock. Cell Signal 2021; 80:109904. [PMID: 33370580 PMCID: PMC8054296 DOI: 10.1016/j.cellsig.2020.109904] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 12/20/2020] [Accepted: 12/21/2020] [Indexed: 12/11/2022]
Abstract
The endogenous circadian clock functions to maintain optimal physiological health through the tissue specific coordination of gene expression and synchronization between tissues of metabolic processes throughout the 24 hour day. Individuals face numerous challenges to circadian function on a daily basis resulting in significant incidences of circadian disorders in the United States and worldwide. Dysfunction of the circadian clock has been implicated in numerous diseases including cancer, diabetes, obesity, cardiovascular and hepatic abnormalities, mood disorders and neurodegenerative diseases. The circadian clock regulates molecular, metabolic and physiological processes through rhythmic gene expression via transcriptional and post-transcriptional processes. Mounting evidence indicates that post-transcriptional regulation by the circadian clock plays a crucial role in maintaining tissue specific biological rhythms. Circadian regulation affecting RNA stability and localization through RNA processing, mRNA degradation, and RNA availability for translation can result in rhythmic protein synthesis, even when the mRNA transcripts themselves do not exhibit rhythms in abundance. The circadian clock also targets the initiation and elongation steps of translation through multiple pathways. In this review, the influence of the circadian clock across the levels of post-transcriptional, translation, and post-translational modifications are examined using examples from humans to cyanobacteria demonstrating the phylogenetic conservation of circadian regulation. Lastly, we briefly discuss chronotherapies and pharmacological treatments that target circadian function. Understanding the complexity and levels through which the circadian clock regulates molecular and physiological processes is important for future advancement of therapeutic outcomes.
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Affiliation(s)
- Amber A Parnell
- Department of Biological Science, Program in Neuroscience, Florida State University, Tallahassee, FL 32306, USA
| | - Aliza K De Nobrega
- Department of Biological Science, Program in Neuroscience, Florida State University, Tallahassee, FL 32306, USA
| | - Lisa C Lyons
- Department of Biological Science, Program in Neuroscience, Florida State University, Tallahassee, FL 32306, USA.
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37
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Ch R, Rey G, Ray S, Jha PK, Driscoll PC, Dos Santos MS, Malik DM, Lach R, Weljie AM, MacRae JI, Valekunja UK, Reddy AB. Rhythmic glucose metabolism regulates the redox circadian clockwork in human red blood cells. Nat Commun 2021; 12:377. [PMID: 33452240 PMCID: PMC7810875 DOI: 10.1038/s41467-020-20479-4] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 12/01/2020] [Indexed: 02/07/2023] Open
Abstract
Circadian clocks coordinate mammalian behavior and physiology enabling organisms to anticipate 24-hour cycles. Transcription-translation feedback loops are thought to drive these clocks in most of mammalian cells. However, red blood cells (RBCs), which do not contain a nucleus, and cannot perform transcription or translation, nonetheless exhibit circadian redox rhythms. Here we show human RBCs display circadian regulation of glucose metabolism, which is required to sustain daily redox oscillations. We found daily rhythms of metabolite levels and flux through glycolysis and the pentose phosphate pathway (PPP). We show that inhibition of critical enzymes in either pathway abolished 24-hour rhythms in metabolic flux and redox oscillations, and determined that metabolic oscillations are necessary for redox rhythmicity. Furthermore, metabolic flux rhythms also occur in nucleated cells, and persist when the core transcriptional circadian clockwork is absent in Bmal1 knockouts. Thus, we propose that rhythmic glucose metabolism is an integral process in circadian rhythms.
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Affiliation(s)
- Ratnasekhar Ch
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, University of Cambridge, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK
- School of Biological Sciences, Queen's University Belfast, Belfast, BT9 5DL, UK
| | - Guillaume Rey
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, University of Cambridge, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK
- Unilabs Genetics Laboratory, 1003, Lausanne, Switzerland
| | - Sandipan Ray
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, Pennsylvania, PA, 19104, USA
- Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
- Department of Biotechnology, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, 502285, Telangana, India
| | - Pawan K Jha
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, Pennsylvania, PA, 19104, USA
- Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Paul C Driscoll
- The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | | | - Dania M Malik
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, Pennsylvania, PA, 19104, USA
- Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Radoslaw Lach
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, University of Cambridge, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK
- Department of Oncology, University of Cambridge, Cambridge Biomedical Campus, Cambridge, CB2 0XZ, UK
| | - Aalim M Weljie
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, Pennsylvania, PA, 19104, USA
- Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - James I MacRae
- The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Utham K Valekunja
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, Pennsylvania, PA, 19104, USA
- Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Akhilesh B Reddy
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, Pennsylvania, PA, 19104, USA.
- Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA.
- Institute for Diabetes, Obesity, and Metabolism, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, 19104, USA.
- Chronobiology and Sleep institute (CSI), Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA.
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38
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Hansen FM, Tanzer MC, Brüning F, Bludau I, Stafford C, Schulman BA, Robles MS, Karayel O, Mann M. Data-independent acquisition method for ubiquitinome analysis reveals regulation of circadian biology. Nat Commun 2021; 12:254. [PMID: 33431886 PMCID: PMC7801436 DOI: 10.1038/s41467-020-20509-1] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 11/27/2020] [Indexed: 12/11/2022] Open
Abstract
Protein ubiquitination is involved in virtually all cellular processes. Enrichment strategies employing antibodies targeting ubiquitin-derived diGly remnants combined with mass spectrometry (MS) have enabled investigations of ubiquitin signaling at a large scale. However, so far the power of data independent acquisition (DIA) with regards to sensitivity in single run analysis and data completeness have not yet been explored. Here, we develop a sensitive workflow combining diGly antibody-based enrichment and optimized Orbitrap-based DIA with comprehensive spectral libraries together containing more than 90,000 diGly peptides. This approach identifies 35,000 diGly peptides in single measurements of proteasome inhibitor-treated cells - double the number and quantitative accuracy of data dependent acquisition. Applied to TNF signaling, the workflow comprehensively captures known sites while adding many novel ones. An in-depth, systems-wide investigation of ubiquitination across the circadian cycle uncovers hundreds of cycling ubiquitination sites and dozens of cycling ubiquitin clusters within individual membrane protein receptors and transporters, highlighting new connections between metabolism and circadian regulation.
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Affiliation(s)
- Fynn M Hansen
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Maria C Tanzer
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Franziska Brüning
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
- Institute of Medical Psychology, Faculty of Medicine, LMU, Munich, Germany
| | - Isabell Bludau
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Che Stafford
- Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Brenda A Schulman
- Department of Molecular Machines and Signaling, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Maria S Robles
- Institute of Medical Psychology, Faculty of Medicine, LMU, Munich, Germany.
| | - Ozge Karayel
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany.
| | - Matthias Mann
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany.
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39
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Yarnoff K, Dodd-O JM. Mixing commonly used crystalloid solutions with red blood cells in five common additives does not negatively impact hemolysis, aggregometry, or deformability. Transfusion 2020; 60:2991-3000. [PMID: 33032376 DOI: 10.1111/trf.16089] [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: 12/04/2019] [Revised: 07/20/2020] [Accepted: 08/11/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND Literature is beginning to challenge the belief that it is unsafe to coinfuse red blood cells (RBCs) with solutions other than isotonic saline. We recently showed that additive-free RBCs tolerated coincubation with Plasma-Lyte or catecholamines dissolved in normal saline (NS), though 5% dextrose in water (D5W) promoted hemolysis. Herein, we evaluate the effect of coincubating crystalloids on additive-preserved RBC hemolysis, aggregation, and membrane deformability. STUDY DESIGN AND METHODS RBCs were coincubated 5 minutes with plasma, NS, Plasma-Lyte, lactated Ringer's (LR) or D5W (1 mL PRBC +131.3 μL solution). Samples were then assessed for hemolysis (free hemoglobin), aggregation (critical shear stress [mPa]), and membrane deformability (elongation index [EI]). Significance (P ≤ .05) by t test or ANOVA with post-hoc Tukey-Kramer test. RESULTS Additive-prepared RBCs coincubated with crystalloid instead of plasma demonstrated: (a) no increase in hemolysis as indicated by plasma free hemoglobin levels that is likely to be clinically relevant; (b) no increase, but in some cases a decrease, in aggregation as indicated by critical shear stress; and (c) in some combinations, a deterioration in deformability. When present, the deformability decrease was likely clinically insignificant in degree, and always returned to normal when the crystalloid was subsequently diluted out with plasma. CONCLUSION Our data suggest that additive-prepared RBCs coincubated for 5 minutes with any of four common crystalloids demonstrate no clinically relevant increased lysis, increased aggregation, or decreased deformability.
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Affiliation(s)
- Kristine Yarnoff
- Department of Anesthesiology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jeffrey M Dodd-O
- Department of Anesthesiology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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40
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Prior KF, Rijo-Ferreira F, Assis PA, Hirako IC, Weaver DR, Gazzinelli RT, Reece SE. Periodic Parasites and Daily Host Rhythms. Cell Host Microbe 2020; 27:176-187. [PMID: 32053788 DOI: 10.1016/j.chom.2020.01.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Biological rhythms appear to be an elegant solution to the challenge of coordinating activities with the consequences of the Earth's daily and seasonal rotation. The genes and molecular mechanisms underpinning circadian clocks in multicellular organisms are well understood. In contrast, the regulatory mechanisms and fitness consequences of biological rhythms exhibited by parasites remain mysterious. Here, we explore how periodicity in parasite traits is generated and why daily rhythms matter for parasite fitness. We focus on malaria (Plasmodium) parasites which exhibit developmental rhythms during replication in the mammalian host's blood and in transmission to vectors. Rhythmic in-host parasite replication is responsible for eliciting inflammatory responses, the severity of disease symptoms, and fueling transmission, as well as conferring tolerance to anti-parasite drugs. Thus, understanding both how and why the timing and synchrony of parasites are connected to the daily rhythms of hosts and vectors may make treatment more effective and less toxic to hosts.
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Affiliation(s)
- Kimberley F Prior
- Institute of Evolutionary Biology & Institute of Immunology and Infection Research, University of Edinburgh, Edinburgh, UK.
| | - Filipa Rijo-Ferreira
- Department of Neuroscience, Peter O'Donnell Jr. Brain Institute & Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Patricia A Assis
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Isabella C Hirako
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA, USA; Laboratório de Imunopatologia, Fundação Oswaldo Cruz - Minas, Belo Horizonte, MG, Brazil
| | - David R Weaver
- Department of Neurobiology & NeuroNexus Institute, University of Massachusetts Medical School, Worcester, MA, USA
| | - Ricardo T Gazzinelli
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA, USA; Laboratório de Imunopatologia, Fundação Oswaldo Cruz - Minas, Belo Horizonte, MG, Brazil
| | - Sarah E Reece
- Institute of Evolutionary Biology & Institute of Immunology and Infection Research, University of Edinburgh, Edinburgh, UK
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41
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Ch R, Chevallier O, Elliott CT. Metabolomics reveal circadian control of cellular metabolism. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2020.115986] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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42
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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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43
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Kawai S, Suzuki M, Arimoto S, Korenaga T, Yasukawa T. Determination of membrane capacitance and cytoplasm conductivity by simultaneous electrorotation. Analyst 2020; 145:4188-4195. [PMID: 32462157 DOI: 10.1039/d0an00100g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Membrane capacitances and cytoplasm conductivities of hematopoietic cells were investigated by simultaneous electrorotation (ROT) systems of multiple cells. Simultaneous ROT was achieved by the rotation of electric fields in grid arrays formed with three-dimensional interdigitated array (3D-IDA) electrodes that can be easily fabricated using two substrates with IDA electrodes. When AC signals were applied to four microband electrodes with a 90° phase difference to each electrode, cells dispersed randomly in the 3D-IDA device started to rotate and moved to the center of each grid. Multiple cells were simultaneously rotated at the center of grids without friction from contact with other cells and substrates. The averages and variance of ROT rates of cells at each frequency can be measured during a single operation of the device within 5 min, resulting in the acquisition of ROT spectra. Membrane capacitances and cytoplasm conductivities of hematopoietic cells (K562 cells, Jurkat cells, and THP-1 cells) were determined by fitting ROT spectra obtained experimentally to the curves calculated theoretically. The values determined by using the simultaneous ROT systems well coincided with the values reported previously. The membrane capacitances and cytoplasm conductivities of WEHI-231 cells were firstly determined to be 8.89 ± 0.25 mF m-2 and 0.28 ± 0.03 S m-1, respectively. Furthermore, the difference of the ROT rates based on the difference of the electric properties of cells was applied to discriminate the types of cells. The acquisition of rotation rates of multiple cells within a single operation makes the statistical analysis extremely profitable for determining the electrical properties of cells.
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Affiliation(s)
- Shikiho Kawai
- Department of Material Science, University of Hyogo, 3-2-1, Kouto, Kamigori, Ako, Hyogo, 678-1297, Japan.
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44
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Melatonin Relations with Energy Metabolism as Possibly Involved in Fatal Mountain Road Traffic Accidents. Int J Mol Sci 2020; 21:ijms21062184. [PMID: 32235717 PMCID: PMC7139848 DOI: 10.3390/ijms21062184] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 03/13/2020] [Accepted: 03/15/2020] [Indexed: 12/18/2022] Open
Abstract
Previous results evidenced acute exposure to high altitude (HA) weakening the relation between daily melatonin cycle and the respiratory quotient. This review deals with the threat extreme environments pose on body time order, particularly concerning energy metabolism. Working at HA, at poles, or in space challenge our ancestral inborn body timing system. This conflict may also mark many aspects of our current lifestyle, involving shift work, rapid time zone crossing, and even prolonged office work in closed buildings. Misalignments between external and internal rhythms, in the short term, traduce into risk of mental and physical performance shortfalls, mood changes, quarrels, drug and alcohol abuse, failure to accomplish with the mission and, finally, high rates of fatal accidents. Relations of melatonin with energy metabolism being altered under a condition of hypoxia focused our attention on interactions of the indoleamine with redox state, as well as, with autonomic regulations. Individual tolerance/susceptibility to such interactions may hint at adequately dealing with body timing disorders under extreme conditions.
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45
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Nicolaides NC, Chrousos GP. Sex differences in circadian endocrine rhythms: Clinical implications. Eur J Neurosci 2020; 52:2575-2585. [PMID: 32012359 DOI: 10.1111/ejn.14692] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 12/23/2019] [Accepted: 01/22/2020] [Indexed: 12/30/2022]
Abstract
Organisms have developed a highly conserved and tightly regulated circadian system, to adjust their daily activities to day/night cycles. This system consists of a central clock, which is located in the hypothalamic suprachiasmatic nucleus, and the peripheral clocks that are ubiquitously expressed in all tissues. Both the central and peripheral clocks communicate with each other and achieve circadian oscillations of gene expression through transcriptional/translational loops mediated by clock transcription factors. It is worth mentioning that circadian non-transcriptional/non-translational rhythms also occur in non-nucleated cells. Interestingly, sex has been identified as an important factor influencing the activity of the circadian system. Indeed, several sex differences have been documented in the anatomy, physiology and pathophysiology that pertain to circadian rhythms. In this review, we present the historical milestones of understanding circadian rhythms, describe the central and peripheral components of the circadian clock system, discuss representative examples of sexual dimorphism of circadian rhythms, and present the most relevant clinical implications.
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Affiliation(s)
- Nicolas C Nicolaides
- Division of Endocrinology, Metabolism and Diabetes, First Department of Pediatrics, National and Kapodistrian University of Athens Medical School, "Aghia Sophia" Children's Hospital, Athens, Greece.,Division of Endocrinology and Metabolism, Center of Clinical, Experimental Surgery and Translational Research, Biomedical Research Foundation of the Academy of Athens, Athens, Greece.,UNESCO Chair on Adolescent Health Care, and University Research Institute of Maternal and Child Health and Precision Medicine, National and Kapodistrian University of Athens Medical School, Athens, Greece
| | - George P Chrousos
- Division of Endocrinology, Metabolism and Diabetes, First Department of Pediatrics, National and Kapodistrian University of Athens Medical School, "Aghia Sophia" Children's Hospital, Athens, Greece.,Division of Endocrinology and Metabolism, Center of Clinical, Experimental Surgery and Translational Research, Biomedical Research Foundation of the Academy of Athens, Athens, Greece.,UNESCO Chair on Adolescent Health Care, and University Research Institute of Maternal and Child Health and Precision Medicine, National and Kapodistrian University of Athens Medical School, Athens, Greece
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46
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Ten-Second Electrophysiology: Evaluation of the 3DEP Platform for high-speed, high-accuracy cell analysis. Sci Rep 2019; 9:19153. [PMID: 31844107 PMCID: PMC6915758 DOI: 10.1038/s41598-019-55579-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 11/18/2019] [Indexed: 01/08/2023] Open
Abstract
Electrical correlates of the physiological state of a cell, such as membrane conductance and capacitance, as well as cytoplasm conductivity, contain vital information about cellular function, ion transport across the membrane, and propagation of electrical signals. They are, however, difficult to measure; gold-standard techniques are typically unable to measure more than a few cells per day, making widespread adoption difficult and limiting statistical reproducibility. We have developed a dielectrophoretic platform using a disposable 3D electrode geometry that accurately (r2 > 0.99) measures mean electrical properties of populations of ~20,000 cells, by taking parallel ensemble measurements of cells at 20 frequencies up to 45 MHz, in (typically) ten seconds. This allows acquisition of ultra-high-resolution (100-point) DEP spectra in under two minutes. Data acquired from a wide range of cells – from platelets to large cardiac cells - benchmark well with patch-clamp-data. These advantages are collectively demonstrated in a longitudinal (same-animal) study of rapidly-changing phenomena such as ultradian (2–3 hour) rhythmicity in whole blood samples of the common vole (Microtus arvalis), taken from 10 µl tail-nick blood samples and avoiding sacrifice of the animal that is typically required in these studies.
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Abstract
Humans, like all mammals, partition their daily behaviour into activity (wakefulness) and rest (sleep) phases that differ largely in their metabolic requirements. The circadian clock evolved as an autonomous timekeeping system that aligns behavioural patterns with the solar day and supports the body functions by anticipating and coordinating the required metabolic programmes. The key component of this synchronization is a master clock in the brain, which responds to light-darkness cues from the environment. However, to achieve circadian control of the entire organism, each cell of the body is equipped with its own circadian oscillator that is controlled by the master clock and confers rhythmicity to individual cells and organs through the control of rate-limiting steps of metabolic programmes. Importantly, metabolic regulation is not a mere output function of the circadian system, but nutrient, energy and redox levels signal back to cellular clocks in order to reinforce circadian rhythmicity and to adapt physiology to temporal tissue-specific needs. Thus, multiple systemic and molecular mechanisms exist that connect the circadian clock with metabolism at all levels, from cellular organelles to the whole organism, and deregulation of this circadian-metabolic crosstalk can lead to various pathologies.
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48
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Łuczyński D, Lautridou J, Hjelde A, Monnoyer R, Eftedal I. Hemoglobin During and Following a 4-Week Commercial Saturation Dive to 200 m. Front Physiol 2019; 10:1494. [PMID: 31866879 PMCID: PMC6909923 DOI: 10.3389/fphys.2019.01494] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 11/22/2019] [Indexed: 12/13/2022] Open
Abstract
Commercial saturation divers must acclimatize to hyperbaric hyperoxia in their work environment, and subsequently readjust to breathing normal air when their period in saturation is over. In this study, we measured hemoglobin (Hb) during and following 4 weeks of heliox saturation diving in order to monitor anemia development and the time for Hb to recover post-saturation. Male commercial saturation divers reported their capillary blood Hb daily, before, and during 28 days of heliox saturation to a working depth of circa 200 m (n = 11), and for 12 days at surface post-saturation (n = 9–7), using HemoCue 201+ Hb devices. Hb remained in normal range during the bottom phase, but fell during the decompression; reaching levels of mild anemia (≤13.6 g/dl) the day after the divers’ return to the surface. Hb was significantly lower than the pre-saturation baseline (14.7 ± 1.1 g/dl) on the fifth day post-saturation (12.8 ± 1.8 g/dl, p = 0.028), before reverting to normal after 6–7 days. At the end of the 12-day post-saturation period, Hb was not statistically different from the pre-saturation baseline. The observed Hb changes, although significant, were modest. While we cannot rule out effect of other factors, the presence of mild anemia may partially explain the transient fatigue that commercial saturation divers experience post-saturation.
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Affiliation(s)
- Damian Łuczyński
- Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, NTNU Norwegian University of Science and Technology, Trondheim, Norway
| | - Jacky Lautridou
- Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, NTNU Norwegian University of Science and Technology, Trondheim, Norway
| | - Astrid Hjelde
- Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, NTNU Norwegian University of Science and Technology, Trondheim, Norway
| | - Roxane Monnoyer
- Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, NTNU Norwegian University of Science and Technology, Trondheim, Norway
| | - Ingrid Eftedal
- Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, NTNU Norwegian University of Science and Technology, Trondheim, Norway.,Faculty of Nursing and Health Sciences, Nord University, Bodø, Norway
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49
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Rashed MZ, Belott CJ, Janis BR, Menze MA, Williams SJ. New insights into anhydrobiosis using cellular dielectrophoresis-based characterization. BIOMICROFLUIDICS 2019; 13:064113. [PMID: 31768199 PMCID: PMC6858285 DOI: 10.1063/1.5126810] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 11/04/2019] [Indexed: 05/04/2023]
Abstract
Late embryogenesis abundant (LEA) proteins are found in desiccation-tolerant species from all domains of life. Despite several decades of investigation, the molecular mechanisms by which LEA proteins confer desiccation tolerance are still unclear. In this study, dielectrophoresis (DEP) was used to determine the electrical properties of Drosophila melanogaster (Kc167) cells ectopically expressing LEA proteins from the anhydrobiotic brine shrimp, Artemia franciscana. Dielectrophoresis-based characterization data demonstrate that the expression of two different LEA proteins, AfrLEA3m and AfrLEA6, increases cytoplasmic conductivity of Kc167 cells to a similar extent above control values. The impact on cytoplasmic conductivity was surprising, given that the concentration of cytoplasmic ions is much higher than the concentrations of ectopically expressed proteins. The DEP data also supported previously reported data suggesting that AfrLEA3m can interact directly with membranes during water stress. This hypothesis was strengthened using scanning electron microscopy, where cells expressing AfrLEA3m were found to retain more circular morphology during desiccation, while control cells exhibited a larger variety of shapes in the desiccated state. These data demonstrate that DEP can be a powerful tool to investigate the role of LEA proteins in desiccation tolerance and may allow to characterize protein-membrane interactions in vivo, when direct observations are challenging.
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Affiliation(s)
- Mohamed Z Rashed
- Department of Mechanical Engineering, University of Louisville, 200 Sackett Hall, Louisville, Kentucky 40208, USA
| | - Clinton J Belott
- Department of Biology, University of Louisville, Life Sciences Building, Louisville, Kentucky 40292, USA
| | - Brett R Janis
- Department of Biology, University of Louisville, Life Sciences Building, Louisville, Kentucky 40292, USA
| | - Michael A Menze
- Department of Biology, University of Louisville, Life Sciences Building, Louisville, Kentucky 40292, USA
| | - Stuart J Williams
- Department of Mechanical Engineering, University of Louisville, 200 Sackett Hall, Louisville, Kentucky 40208, USA
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50
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Godinho-Silva C, Domingues RG, Rendas M, Raposo B, Ribeiro H, da Silva JA, Vieira A, Costa RM, Barbosa-Morais NL, Carvalho T, Veiga-Fernandes H. Light-entrained and brain-tuned circadian circuits regulate ILC3s and gut homeostasis. Nature 2019; 574:254-258. [PMID: 31534216 PMCID: PMC6788927 DOI: 10.1038/s41586-019-1579-3] [Citation(s) in RCA: 130] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Accepted: 08/13/2019] [Indexed: 12/25/2022]
Abstract
Group 3 innate lymphoid cells (ILC3s) are major regulators of inflammation, infection, microbiota composition and metabolism1. ILC3s and neuronal cells have been shown to interact at discrete mucosal locations to steer mucosal defence2,3. Nevertheless, it is unclear whether neuroimmune circuits operate at an organismal level, integrating extrinsic environmental signals to orchestrate ILC3 responses. Here we show that light-entrained and brain-tuned circadian circuits regulate enteric ILC3s, intestinal homeostasis, gut defence and host lipid metabolism in mice. We found that enteric ILC3s display circadian expression of clock genes and ILC3-related transcription factors. ILC3-autonomous ablation of the circadian regulator Arntl led to disrupted gut ILC3 homeostasis, impaired epithelial reactivity, a deregulated microbiome, increased susceptibility to bowel infection and disrupted lipid metabolism. Loss of ILC3-intrinsic Arntl shaped the gut 'postcode receptors' of ILC3s. Strikingly, light-dark cycles, feeding rhythms and microbial cues differentially regulated ILC3 clocks, with light signals being the major entraining cues of ILC3s. Accordingly, surgically or genetically induced deregulation of brain rhythmicity led to disrupted circadian ILC3 oscillations, a deregulated microbiome and altered lipid metabolism. Our work reveals a circadian circuitry that translates environmental light cues into enteric ILC3s, shaping intestinal health, metabolism and organismal homeostasis.
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Affiliation(s)
| | - Rita G Domingues
- Champalimaud Research, Champalimaud Centre for the Unknown, Lisbon, Portugal
- Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - Miguel Rendas
- Champalimaud Research, Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Bruno Raposo
- Champalimaud Research, Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Hélder Ribeiro
- Champalimaud Research, Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Joaquim Alves da Silva
- Champalimaud Research, Champalimaud Centre for the Unknown, Lisbon, Portugal
- Champalimaud Clinical Centre, Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Ana Vieira
- Champalimaud Research, Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Rui M Costa
- Champalimaud Research, Champalimaud Centre for the Unknown, Lisbon, Portugal
- Zuckerman Mind Brain Behavior Institute, Columbia University, New York, NY, USA
| | - Nuno L Barbosa-Morais
- Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - Tânia Carvalho
- Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
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