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Sendetski M, Wedel S, Furutani K, Hahnefeld L, Angioni C, Heering J, Zimmer B, Pierre S, Banica AM, Scholich K, Tunaru S, Geisslinger G, Ji RR, Sisignano M. Oleic acid released by sensory neurons inhibits TRPV1-mediated thermal hypersensitivity via GPR40. iScience 2024; 27:110552. [PMID: 39171292 PMCID: PMC11338150 DOI: 10.1016/j.isci.2024.110552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 06/17/2024] [Accepted: 07/17/2024] [Indexed: 08/23/2024] Open
Abstract
Noxious stimuli activate nociceptive sensory neurons, causing action potential firing and the release of diverse signaling molecules. Several peptides have already been identified to be released by sensory neurons and shown to modulate inflammatory responses and inflammatory pain. However, it is still unclear whether lipid mediators can be released upon sensory neuron activation to modulate intercellular communication. Here, we analyzed the lipid secretome of capsaicin-stimulated nociceptive neurons with LC-HRMS, revealing that oleic acid is strongly released from sensory neurons by capsaicin. We further demonstrated that oleic acid inhibits capsaicin-induced calcium transients in sensory neurons and reverses bradykinin-induced TRPV1 sensitization by a calcineurin (CaN) and GPR40 (FFAR1) dependent pathway. Additionally, oleic acid alleviated zymosan-mediated thermal hypersensitivity via the GPR40, suggesting that the capsaicin-mediated oleic acid release from sensory neurons acts as a protective and feedback mechanism, preventing sensory neurons from nociceptive overstimulation via the GPR40/CaN/TRPV1-axis.
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Affiliation(s)
- Maksim Sendetski
- Goethe University Frankfurt, University Hospital, Institute of Clinical Pharmacology, Theodor-Stern-Kai 7, 60590 Frankfurt Am Main, Germany
| | - Saskia Wedel
- Goethe University Frankfurt, University Hospital, Institute of Clinical Pharmacology, Theodor-Stern-Kai 7, 60590 Frankfurt Am Main, Germany
| | - Kenta Furutani
- Department of Anesthesiology, Center for Translational Pain Medicine, Duke University Medical Center, Durham, NC, USA
| | - Lisa Hahnefeld
- Goethe University Frankfurt, University Hospital, Institute of Clinical Pharmacology, Theodor-Stern-Kai 7, 60590 Frankfurt Am Main, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Theodor Stern-Kai 7, 60596 Frankfurt Am Main, Germany
- Fraunhofer Cluster of Excellence for Immune-Mediated Diseases (CIMD), Theodor Stern-Kai 7, 60596 Frankfurt Am Main, Germany
| | - Carlo Angioni
- Goethe University Frankfurt, University Hospital, Institute of Clinical Pharmacology, Theodor-Stern-Kai 7, 60590 Frankfurt Am Main, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Theodor Stern-Kai 7, 60596 Frankfurt Am Main, Germany
| | - Jan Heering
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Theodor Stern-Kai 7, 60596 Frankfurt Am Main, Germany
| | - Béla Zimmer
- Goethe University Frankfurt, University Hospital, Institute of Clinical Pharmacology, Theodor-Stern-Kai 7, 60590 Frankfurt Am Main, Germany
| | - Sandra Pierre
- Goethe University Frankfurt, University Hospital, Institute of Clinical Pharmacology, Theodor-Stern-Kai 7, 60590 Frankfurt Am Main, Germany
| | - Alexandra-Maria Banica
- Cell Signalling Research Group, Institute of Biochemistry of the Romanian Academy, Splaiul Independentei 296, 060031 Bucharest, Romania
| | - Klaus Scholich
- Goethe University Frankfurt, University Hospital, Institute of Clinical Pharmacology, Theodor-Stern-Kai 7, 60590 Frankfurt Am Main, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Theodor Stern-Kai 7, 60596 Frankfurt Am Main, Germany
| | - Sorin Tunaru
- Cell Signalling Research Group, Institute of Biochemistry of the Romanian Academy, Splaiul Independentei 296, 060031 Bucharest, Romania
| | - Gerd Geisslinger
- Goethe University Frankfurt, University Hospital, Institute of Clinical Pharmacology, Theodor-Stern-Kai 7, 60590 Frankfurt Am Main, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Theodor Stern-Kai 7, 60596 Frankfurt Am Main, Germany
- Fraunhofer Cluster of Excellence for Immune-Mediated Diseases (CIMD), Theodor Stern-Kai 7, 60596 Frankfurt Am Main, Germany
| | - Ru-Rong Ji
- Department of Anesthesiology, Center for Translational Pain Medicine, Duke University Medical Center, Durham, NC, USA
- Departments of Cell Biology and Neurobiology, Duke University Medical Center, Durham, NC, USA
| | - Marco Sisignano
- Goethe University Frankfurt, University Hospital, Institute of Clinical Pharmacology, Theodor-Stern-Kai 7, 60590 Frankfurt Am Main, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Theodor Stern-Kai 7, 60596 Frankfurt Am Main, Germany
- Fraunhofer Cluster of Excellence for Immune-Mediated Diseases (CIMD), Theodor Stern-Kai 7, 60596 Frankfurt Am Main, Germany
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2
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Kuchimaru T. Emerging Synthetic Bioluminescent Reactions for Non-Invasive Imaging of Freely Moving Animals. Int J Mol Sci 2024; 25:7338. [PMID: 39000448 PMCID: PMC11242611 DOI: 10.3390/ijms25137338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2024] [Revised: 07/02/2024] [Accepted: 07/03/2024] [Indexed: 07/16/2024] Open
Abstract
Bioluminescence imaging (BLI) is an indispensable technique for visualizing the dynamics of diverse biological processes in mammalian animal models, including cancer, viral infections, and immune responses. However, a critical scientific challenge remains: non-invasively visualizing homeostatic and disease mechanisms in freely moving animals to understand the molecular basis of exercises, social behavior, and other phenomena. Classical BLI relies on prolonged camera exposure to accumulate the limited number of photons that traveled from deep tissues in anesthetized or constrained animals. Recent advancements in synthetic bioluminescence reactions, utilizing artificial luciferin-luciferase pairs, have considerably increased the number of detectable photons from deep tissues, facilitating high-speed BLI to capture moving objects. In this review, I provide an overview of emerging synthetic bioluminescence reactions that enable the non-invasive imaging of freely moving animals. This approach holds the potential to uncover unique physiological processes that are inaccessible with current methodologies.
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Affiliation(s)
- Takahiro Kuchimaru
- Center for Molecular Medicine, Jichi Medical University, Tochigi 329-0498, Japan
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3
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Wang T, Shao J, Kumar S, Alnouri MW, Carvalho J, Günther S, Krasel C, Murphy KT, Bünemann M, Offermanns S, Wettschureck N. Orphan GPCR GPRC5C Facilitates Angiotensin II-Induced Smooth Muscle Contraction. Circ Res 2024; 134:1259-1275. [PMID: 38597112 DOI: 10.1161/circresaha.123.323752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 03/29/2024] [Indexed: 04/11/2024]
Abstract
BACKGROUND GPCRs (G-protein-coupled receptors) play a central role in the regulation of smooth muscle cell (SMC) contractility, but the function of SMC-expressed orphan GPCR class C group 5 member C (GPRC5C) is unclear. The aim of this project is to define the role of GPRC5C in SMC in vitro and in vivo. METHODS We studied the role of GPRC5C in the regulation of SMC contractility and differentiation in human and murine SMC in vitro, as well as in tamoxifen-inducible, SMC-specific GPRC5C knockout mice under basal conditions and in vascular disease in vivo. RESULTS Mesenteric arteries from tamoxifen-inducible, SMC-specific GPRC5C knockout mice showed ex vivo significantly reduced angiotensin II (Ang II)-dependent calcium mobilization and contraction, whereas responses to other relaxant or contractile factors were normal. In vitro, the knockdown of GPRC5C in human aortic SMC resulted in diminished Ang II-dependent inositol phosphate production and lower myosin light chain phosphorylation. In line with this, tamoxifen-inducible, SMC-specific GPRC5C knockout mice showed reduced Ang II-induced arterial hypertension, and acute inactivation of GPRC5C was able to ameliorate established arterial hypertension. Mechanistically, we show that GPRC5C and the Ang II receptor AT1 dimerize, and knockdown of GPRC5C resulted in reduced binding of Ang II to AT1 receptors in HEK293 cells, human and murine SMC, and arteries from tamoxifen-inducible, SMC-specific GPRC5C knockout mice. CONCLUSIONS Our data show that GPRC5C regulates Ang II-dependent vascular contraction by facilitating AT1 receptor-ligand binding and signaling.
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Affiliation(s)
- Tianpeng Wang
- Department of Pharmacology (T.W., J.S., S.K., M.W.A., J.C., S.O., N.W.), Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Jingchen Shao
- Department of Pharmacology (T.W., J.S., S.K., M.W.A., J.C., S.O., N.W.), Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Shamit Kumar
- Department of Pharmacology (T.W., J.S., S.K., M.W.A., J.C., S.O., N.W.), Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Mohammad Wessam Alnouri
- Department of Pharmacology (T.W., J.S., S.K., M.W.A., J.C., S.O., N.W.), Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Jorge Carvalho
- Department of Pharmacology (T.W., J.S., S.K., M.W.A., J.C., S.O., N.W.), Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Stefan Günther
- Bioinformatics and Deep Sequencing Platform (S.G.), Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Cornelius Krasel
- Department of Pharmacology and Clinical Pharmacy, Philipps-University Marburg, Germany (C.K., M.B.)
| | - Kate T Murphy
- Department of Anatomy and Physiology, The University of Melbourne, VIC, Australia (K.T.M.)
| | - Moritz Bünemann
- Department of Pharmacology and Clinical Pharmacy, Philipps-University Marburg, Germany (C.K., M.B.)
| | - Stefan Offermanns
- Department of Pharmacology (T.W., J.S., S.K., M.W.A., J.C., S.O., N.W.), Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
- Medical Faculty, Goethe University Frankfurt, Germany (S.O., N.W.)
- German Center for Cardiovascular Research (DZHK), Frankfurt/Bad Nauheim, Germany (S.O., N.W.)
- Cardiopulmonary Institute, Frankfurt/Bad Nauheim, Germany (S.O., N.W.)
| | - Nina Wettschureck
- Department of Pharmacology (T.W., J.S., S.K., M.W.A., J.C., S.O., N.W.), Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
- Medical Faculty, Goethe University Frankfurt, Germany (S.O., N.W.)
- German Center for Cardiovascular Research (DZHK), Frankfurt/Bad Nauheim, Germany (S.O., N.W.)
- Cardiopulmonary Institute, Frankfurt/Bad Nauheim, Germany (S.O., N.W.)
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4
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Thiel D, Yañez Guerra LA, Kieswetter A, Cole AG, Temmerman L, Technau U, Jékely G. Large-scale deorphanization of Nematostella vectensis neuropeptide G protein-coupled receptors supports the independent expansion of bilaterian and cnidarian peptidergic systems. eLife 2024; 12:RP90674. [PMID: 38727714 PMCID: PMC11087051 DOI: 10.7554/elife.90674] [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: 05/12/2024] Open
Abstract
Neuropeptides are ancient signaling molecules in animals but only few peptide receptors are known outside bilaterians. Cnidarians possess a large number of G protein-coupled receptors (GPCRs) - the most common receptors of bilaterian neuropeptides - but most of these remain orphan with no known ligands. We searched for neuropeptides in the sea anemone Nematostella vectensis and created a library of 64 peptides derived from 33 precursors. In a large-scale pharmacological screen with these peptides and 161 N. vectensis GPCRs, we identified 31 receptors specifically activated by 1 to 3 of 14 peptides. Mapping GPCR and neuropeptide expression to single-cell sequencing data revealed how cnidarian tissues are extensively connected by multilayer peptidergic networks. Phylogenetic analysis identified no direct orthology to bilaterian peptidergic systems and supports the independent expansion of neuropeptide signaling in cnidarians from a few ancestral peptide-receptor pairs.
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Affiliation(s)
- Daniel Thiel
- Living Systems Institute, University of ExeterExeterUnited Kingdom
| | | | - Amanda Kieswetter
- Animal Physiology & Neurobiology, Department of Biology, University of LeuvenLeuvenBelgium
| | - Alison G Cole
- Department of Neurosciences and Developmental Biology, Faculty of Life Sciences, University of ViennaViennaAustria
| | - Liesbet Temmerman
- Animal Physiology & Neurobiology, Department of Biology, University of LeuvenLeuvenBelgium
| | - Ulrich Technau
- Department of Neurosciences and Developmental Biology, Faculty of Life Sciences, University of ViennaViennaAustria
| | - Gáspár Jékely
- Living Systems Institute, University of ExeterExeterUnited Kingdom
- Centre for Organismal Studies (COS), Heidelberg UniversityHeidelbergGermany
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5
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Trif C, Banica AM, Manolache A, Anghel SA, Huţanu DE, Stratulat T, Badea R, Oprita G, Selescu T, Petrescu SM, Sisignano M, Offermanns S, Babes A, Tunaru S. Inhibition of TRPM8 function by prostacyclin receptor agonists requires coupling to Gq/11 proteins. Br J Pharmacol 2024; 181:1438-1451. [PMID: 38044577 DOI: 10.1111/bph.16295] [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: 04/18/2023] [Revised: 11/16/2023] [Accepted: 11/21/2023] [Indexed: 12/05/2023] Open
Abstract
BACKGROUND AND PURPOSE The TRPM8 ion channel is involved in innocuous cold sensing and has a potent anti-inflammatory action. Its activation by lower temperature or chemical agonists such as menthol and icilin induces analgesic effects, reversing hypersensitivity and reducing chronic pain. On the other hand, prostacyclin (PGI2) enhances pain and inflammation by activating the IP receptors. Due to the critical roles of TRPM8 and IP receptors in the regulation of inflammatory pain, and considering their overlapping expression pattern, we analysed the functional interaction between human TRPM8 and IP receptors. EXPERIMENTAL APPROACH We transiently expressed human TRPM8 channels and IP receptors in HEK293T cells and carried out intracellular calcium and cAMP measurements. Additionally, we cultured neurons from the dorsal root ganglia (DRGs) of mice and determined the increase in intracellular calcium triggered by the TRPM8 agonist, icilin, in the presence of the IP receptor agonist cicaprost, the IP receptor antagonist Cay10441, and the Gq/11 inhibitor YM254890. KEY RESULTS Activation of IP receptors by selective agonists (cicaprost, beraprost, and iloprost) inhibited TRPM8 channel function, independently of the Gs-cAMP pathway. The potent inhibition of TRPM8 channels by IP receptor agonists involved Gq/11 coupling. These effects were also observed in neurons isolated from murine DRGs. CONCLUSIONS AND IMPLICATIONS Our results demonstrate an unusual signalling pathway of IP receptors by coupling to Gq/11 proteins to inhibit TRPM8 channel function. This pathway may contribute to a better understanding of the role of TRPM8 channels and IP receptors in regulating pain and inflammation.
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Affiliation(s)
- Cosmin Trif
- Cell Signalling Research Group, Institute of Biochemistry of the Romanian Academy, Bucharest, Romania
| | - Alexandra-Maria Banica
- Cell Signalling Research Group, Institute of Biochemistry of the Romanian Academy, Bucharest, Romania
| | - Alexandra Manolache
- Department of Anatomy, Physiology, and Biophysics, Faculty of Biology, University of Bucharest, Bucharest, Romania
| | - Sorina Andreea Anghel
- Cell Signalling Research Group, Institute of Biochemistry of the Romanian Academy, Bucharest, Romania
| | - Debora-Elena Huţanu
- Department of Anatomy, Physiology, and Biophysics, Faculty of Biology, University of Bucharest, Bucharest, Romania
| | - Teodora Stratulat
- Cell Signalling Research Group, Institute of Biochemistry of the Romanian Academy, Bucharest, Romania
- Department of Anatomy, Physiology, and Biophysics, Faculty of Biology, University of Bucharest, Bucharest, Romania
| | - Rodica Badea
- Cell Signalling Research Group, Institute of Biochemistry of the Romanian Academy, Bucharest, Romania
| | - George Oprita
- Department of Anatomy, Physiology, and Biophysics, Faculty of Biology, University of Bucharest, Bucharest, Romania
| | - Tudor Selescu
- Department of Anatomy, Physiology, and Biophysics, Faculty of Biology, University of Bucharest, Bucharest, Romania
| | - Stefana M Petrescu
- Cell Signalling Research Group, Institute of Biochemistry of the Romanian Academy, Bucharest, Romania
| | - Marco Sisignano
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt/ZAFES, University Hospital, Goethe-University, Frankfurt am Main, Germany
| | - Stefan Offermanns
- Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Alexandru Babes
- Department of Anatomy, Physiology, and Biophysics, Faculty of Biology, University of Bucharest, Bucharest, Romania
| | - Sorin Tunaru
- Cell Signalling Research Group, Institute of Biochemistry of the Romanian Academy, Bucharest, Romania
- Prothanor Biotech S.R.L., Bucharest, Romania
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6
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Martinez-Sielva A, Vicente M, Salgado-Almario J, Garcia-Blazquez A, Domingo B, Llopis J. Suppression of Contraction Raises Calcium Ion Levels in the Heart of Zebrafish Larvae. BIOSENSORS 2024; 14:219. [PMID: 38785693 PMCID: PMC11118826 DOI: 10.3390/bios14050219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 04/19/2024] [Accepted: 04/25/2024] [Indexed: 05/25/2024]
Abstract
Zebrafish larvae have emerged as a valuable model for studying heart physiology and pathophysiology, as well as for drug discovery, in part thanks to its transparency, which simplifies microscopy. However, in fluorescence-based optical mapping, the beating of the heart results in motion artifacts. Two approaches have been employed to eliminate heart motion during calcium or voltage mapping in zebrafish larvae: the knockdown of cardiac troponin T2A and the use of myosin inhibitors. However, these methods disrupt the mechano-electric and mechano-mechanic coupling mechanisms. We have used ratiometric genetically encoded biosensors to image calcium in the beating heart of intact zebrafish larvae because ratiometric quantification corrects for motion artifacts. In this study, we found that halting heart motion by genetic means (injection of tnnt2a morpholino) or chemical tools (incubation with para-aminoblebbistatin) leads to bradycardia, and increases calcium levels and the size of the calcium transients, likely by abolishing a feedback mechanism that connects contraction with calcium regulation. These outcomes were not influenced by the calcium-binding domain of the gene-encoded biosensors employed, as biosensors with a modified troponin C (Twitch-4), calmodulin (mCyRFP1-GCaMP6f), or the photoprotein aequorin (GFP-aequorin) all yielded similar results. Cardiac contraction appears to be an important regulator of systolic and diastolic Ca2+ levels, and of the heart rate.
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Affiliation(s)
| | | | | | | | - Beatriz Domingo
- Physiology and Cell Dynamics Group, Instituto de Biomedicina de la Universidad de Castilla-La Mancha, Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, C/Almansa 14, 02006 Albacete, Spain; (A.M.-S.); (M.V.); (J.S.-A.); (A.G.-B.)
| | - Juan Llopis
- Physiology and Cell Dynamics Group, Instituto de Biomedicina de la Universidad de Castilla-La Mancha, Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, C/Almansa 14, 02006 Albacete, Spain; (A.M.-S.); (M.V.); (J.S.-A.); (A.G.-B.)
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7
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Jensen GC, Janis MK, Nguyen HN, David OW, Zastrow ML. Fluorescent Protein-Based Sensors for Detecting Essential Metal Ions across the Tree of Life. ACS Sens 2024; 9:1622-1643. [PMID: 38587931 PMCID: PMC11073808 DOI: 10.1021/acssensors.3c02695] [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: 04/10/2024]
Abstract
Genetically encoded fluorescent metal ion sensors are powerful tools for elucidating metal dynamics in living systems. Over the last 25 years since the first examples of genetically encoded fluorescent protein-based calcium indicators, this toolbox of probes has expanded to include other essential and non-essential metal ions. Collectively, these tools have illuminated fundamental aspects of metal homeostasis and trafficking that are crucial to fields ranging from neurobiology to human nutrition. Despite these advances, much of the application of metal ion sensors remains limited to mammalian cells and tissues and a limited number of essential metals. Applications beyond mammalian systems and in vivo applications in living organisms have primarily used genetically encoded calcium ion sensors. The aim of this Perspective is to provide, with the support of historical and recent literature, an updated and critical view of the design and use of fluorescent protein-based sensors for detecting essential metal ions in various organisms. We highlight the historical progress and achievements with calcium sensors and discuss more recent advances and opportunities for the detection of other essential metal ions. We also discuss outstanding challenges in the field and directions for future studies, including detecting a wider variety of metal ions, developing and implementing a broader spectral range of sensors for multiplexing experiments, and applying sensors to a wider range of single- and multi-species biological systems.
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Affiliation(s)
- Gary C Jensen
- Department of Chemistry, University of Houston, Houston, Texas 77204, United States
| | - Makena K Janis
- Department of Chemistry, University of Houston, Houston, Texas 77204, United States
| | - Hazel N Nguyen
- Department of Chemistry, University of Houston, Houston, Texas 77204, United States
| | - Ogonna W David
- Department of Chemistry, University of Houston, Houston, Texas 77204, United States
| | - Melissa L Zastrow
- Department of Chemistry, University of Houston, Houston, Texas 77204, United States
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8
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Nadezhdin KD, Correia L, Shalygin A, Aktolun M, Neuberger A, Gudermann T, Kurnikova MG, Chubanov V, Sobolevsky AI. Structural basis of selective TRPM7 inhibition by the anticancer agent CCT128930. Cell Rep 2024; 43:114108. [PMID: 38615321 PMCID: PMC11096667 DOI: 10.1016/j.celrep.2024.114108] [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: 11/20/2023] [Revised: 03/07/2024] [Accepted: 03/28/2024] [Indexed: 04/16/2024] Open
Abstract
TRP channels are implicated in various diseases, but high structural similarity between them makes selective pharmacological modulation challenging. Here, we study the molecular mechanism underlying specific inhibition of the TRPM7 channel, which is essential for cancer cell proliferation, by the anticancer agent CCT128930 (CCT). Using cryo-EM, functional analysis, and MD simulations, we show that CCT binds to a vanilloid-like (VL) site, stabilizing TRPM7 in the closed non-conducting state. Similar to other allosteric inhibitors of TRPM7, NS8593 and VER155008, binding of CCT is accompanied by displacement of a lipid that resides in the VL site in the apo condition. Moreover, we demonstrate the principal role of several residues in the VL site enabling CCT to inhibit TRPM7 without impacting the homologous TRPM6 channel. Hence, our results uncover the central role of the VL site for the selective interaction of TRPM7 with small molecules that can be explored in future drug design.
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Affiliation(s)
- Kirill D Nadezhdin
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY, USA
| | - Leonor Correia
- Walther-Straub Institute of Pharmacology and Toxicology, LMU Munich, Munich, Germany
| | - Alexey Shalygin
- Comprehensive Pneumology Center, a Member of the German Center for Lung Research (DZL), Munich, Germany
| | - Muhammed Aktolun
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Arthur Neuberger
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY, USA
| | - Thomas Gudermann
- Walther-Straub Institute of Pharmacology and Toxicology, LMU Munich, Munich, Germany; Comprehensive Pneumology Center, a Member of the German Center for Lung Research (DZL), Munich, Germany
| | - Maria G Kurnikova
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Vladimir Chubanov
- Walther-Straub Institute of Pharmacology and Toxicology, LMU Munich, Munich, Germany.
| | - Alexander I Sobolevsky
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY, USA.
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9
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Perniss A, Boonen B, Tonack S, Thiel M, Poharkar K, Alnouri MW, Keshavarz M, Papadakis T, Wiegand S, Pfeil U, Richter K, Althaus M, Oberwinkler J, Schütz B, Boehm U, Offermanns S, Leinders-Zufall T, Zufall F, Kummer W. A succinate/SUCNR1-brush cell defense program in the tracheal epithelium. SCIENCE ADVANCES 2023; 9:eadg8842. [PMID: 37531421 PMCID: PMC10396310 DOI: 10.1126/sciadv.adg8842] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 06/29/2023] [Indexed: 08/04/2023]
Abstract
Host-derived succinate accumulates in the airways during bacterial infection. Here, we show that luminal succinate activates murine tracheal brush (tuft) cells through a signaling cascade involving the succinate receptor 1 (SUCNR1), phospholipase Cβ2, and the cation channel transient receptor potential channel subfamily M member 5 (TRPM5). Stimulated brush cells then trigger a long-range Ca2+ wave spreading radially over the tracheal epithelium through a sequential signaling process. First, brush cells release acetylcholine, which excites nearby cells via muscarinic acetylcholine receptors. From there, the Ca2+ wave propagates through gap junction signaling, reaching also distant ciliated and secretory cells. These effector cells translate activation into enhanced ciliary activity and Cl- secretion, which are synergistic in boosting mucociliary clearance, the major innate defense mechanism of the airways. Our data establish tracheal brush cells as a central hub in triggering a global epithelial defense program in response to a danger-associated metabolite.
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Affiliation(s)
- Alexander Perniss
- Institute of Anatomy and Cell Biology, German Center for Lung Research, Justus Liebig University Giessen; Giessen, Germany
- Excellence Cluster The Cardio-Pulmonary Institute, Justus Liebig University Giessen, Giessen, Germany
| | - Brett Boonen
- Center for Integrative Physiology and Molecular Medicine, Saarland University, Homburg, Germany
- Laboratory of Ion Channel Research, VIB Center for Brain and Disease, Department of Cellular and Molecular Medicine, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Sarah Tonack
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Moritz Thiel
- Institute of Anatomy and Cell Biology, German Center for Lung Research, Justus Liebig University Giessen; Giessen, Germany
- Excellence Cluster The Cardio-Pulmonary Institute, Justus Liebig University Giessen, Giessen, Germany
| | - Krupali Poharkar
- Institute of Anatomy and Cell Biology, German Center for Lung Research, Justus Liebig University Giessen; Giessen, Germany
- Excellence Cluster The Cardio-Pulmonary Institute, Justus Liebig University Giessen, Giessen, Germany
| | - Mohamad Wessam Alnouri
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Maryam Keshavarz
- Institute of Anatomy and Cell Biology, German Center for Lung Research, Justus Liebig University Giessen; Giessen, Germany
- Excellence Cluster The Cardio-Pulmonary Institute, Justus Liebig University Giessen, Giessen, Germany
| | - Tamara Papadakis
- Institute of Anatomy and Cell Biology, German Center for Lung Research, Justus Liebig University Giessen; Giessen, Germany
- Excellence Cluster The Cardio-Pulmonary Institute, Justus Liebig University Giessen, Giessen, Germany
| | - Silke Wiegand
- Institute of Anatomy and Cell Biology, German Center for Lung Research, Justus Liebig University Giessen; Giessen, Germany
- Excellence Cluster The Cardio-Pulmonary Institute, Justus Liebig University Giessen, Giessen, Germany
| | - Uwe Pfeil
- Institute of Anatomy and Cell Biology, German Center for Lung Research, Justus Liebig University Giessen; Giessen, Germany
- Excellence Cluster The Cardio-Pulmonary Institute, Justus Liebig University Giessen, Giessen, Germany
| | - Katrin Richter
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus-Liebig-University, Giessen, Germany
| | - Mike Althaus
- Physiology Group, Bonn-Rhein-Sieg University of Applied Sciences, Rheinbach, Germany
| | - Johannes Oberwinkler
- Institut für Physiologie und Pathophysiologie, Philipps-Universität Marburg, Marburg, Germany
| | - Burkhard Schütz
- Institute of Anatomy and Cell Biology, Philipps University Marburg, Marburg, Germany
| | - Ulrich Boehm
- Experimental Pharmacology, Center for Molecular Signaling (PZMS), Saarland University, Homburg, Germany
| | - Stefan Offermanns
- Excellence Cluster The Cardio-Pulmonary Institute, Justus Liebig University Giessen, Giessen, Germany
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Trese Leinders-Zufall
- Center for Integrative Physiology and Molecular Medicine, Saarland University, Homburg, Germany
| | - Frank Zufall
- Center for Integrative Physiology and Molecular Medicine, Saarland University, Homburg, Germany
| | - Wolfgang Kummer
- Institute of Anatomy and Cell Biology, German Center for Lung Research, Justus Liebig University Giessen; Giessen, Germany
- Excellence Cluster The Cardio-Pulmonary Institute, Justus Liebig University Giessen, Giessen, Germany
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10
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Alonso MT, Torres-Vidal P, Calvo B, Rodriguez C, Delrio-Lorenzo A, Rojo-Ruiz J, Garcia-Sancho J, Patel S. Use of aequorin-based indicators for monitoring Ca 2+ in acidic organelles. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2023; 1870:119481. [PMID: 37142127 DOI: 10.1016/j.bbamcr.2023.119481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/22/2023] [Accepted: 04/26/2023] [Indexed: 05/06/2023]
Abstract
Over the last years, there is accumulating evidence that acidic organelles can accumulate and release Ca2+ upon cell activation. Hence, reliable recording of Ca2+ dynamics in these compartments is essential for understanding the physiopathological aspects of acidic organelles. Genetically encoded Ca2+ indicators (GECIs) are valuable tools to monitor Ca2+ in specific locations, although their use in acidic compartments is challenging due to the pH sensitivity of most available fluorescent GECIs. By contrast, bioluminescent GECIs have a combination of features (marginal pH sensitivity, low background, no phototoxicity, no photobleaching, high dynamic range and tunable affinity) that render them advantageous to achieve an enhanced signal-to-noise ratio in acidic compartments. This article reviews the use of bioluminescent aequorin-based GECIs targeted to acidic compartments. A need for more measurements in highly acidic compartments is identified.
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Affiliation(s)
- M T Alonso
- Unidad de Excelencia, Instituto de Biomedicina y Genética Molecular de Valladolid (IBGM), Universidad de Valladolid y Consejo Superior de Investigaciones Científicas (CSIC), c/ Sanz y Forés 3, 47003 Valladolid, Spain.
| | - P Torres-Vidal
- Unidad de Excelencia, Instituto de Biomedicina y Genética Molecular de Valladolid (IBGM), Universidad de Valladolid y Consejo Superior de Investigaciones Científicas (CSIC), c/ Sanz y Forés 3, 47003 Valladolid, Spain
| | - B Calvo
- Unidad de Excelencia, Instituto de Biomedicina y Genética Molecular de Valladolid (IBGM), Universidad de Valladolid y Consejo Superior de Investigaciones Científicas (CSIC), c/ Sanz y Forés 3, 47003 Valladolid, Spain
| | - C Rodriguez
- Unidad de Excelencia, Instituto de Biomedicina y Genética Molecular de Valladolid (IBGM), Universidad de Valladolid y Consejo Superior de Investigaciones Científicas (CSIC), c/ Sanz y Forés 3, 47003 Valladolid, Spain
| | - A Delrio-Lorenzo
- Universidad Alfonso X el Sabio, Madrid, Avenida Universidad, 1, 28691 Villanueva de la Cañada, Madrid, Spain
| | - J Rojo-Ruiz
- Unidad de Excelencia, Instituto de Biomedicina y Genética Molecular de Valladolid (IBGM), Universidad de Valladolid y Consejo Superior de Investigaciones Científicas (CSIC), c/ Sanz y Forés 3, 47003 Valladolid, Spain
| | - J Garcia-Sancho
- Unidad de Excelencia, Instituto de Biomedicina y Genética Molecular de Valladolid (IBGM), Universidad de Valladolid y Consejo Superior de Investigaciones Científicas (CSIC), c/ Sanz y Forés 3, 47003 Valladolid, Spain
| | - S Patel
- Department of Cell and Developmental Biology, University College London, Gower Street, London WC1E 6BT, UK
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11
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Huţanu DE, Oprita G, Domocos D, Selescu T, Manolache A, Stratulat T, Sauer SK, Tunaru S, Babes A, Babes RM. The antimalarial artemisinin is a non-electrophilic agonist of the transient receptor potential ankyrin type 1 receptor-channel. Eur J Pharmacol 2023; 939:175467. [PMID: 36543288 DOI: 10.1016/j.ejphar.2022.175467] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022]
Abstract
Artemisinin and its derivatives are the main therapeutic drugs against Plasmodium protists, the causative agents of malaria. While several putative mechanisms of action have been proposed, the precise molecular targets of these compounds have not been fully elucidated. In addition to their antimalarial properties, artemisinins have been reported to act as anti-tumour agents and certain antinociceptive effects have also been proposed. We investigated the effect of the parent compound, artemisinin, on a number of temperature-gated Transient Receptor Potential ion channels (so called thermoTRPs), given their demonstrated roles in pain-sensing and cancer. We report that artemisinin acts as an agonist of the Transient Receptor Potential Ankyrin type 1 (TRPA1) receptor channel. Artemisinin was able to evoke calcium transients in HEK293T cells expressing recombinant human TRPA1, as well as in a subpopulation of mouse dorsal root ganglion (DRG) neurons which also responded to the selective TRPA1 agonist allyl isothiocyanate (AITC) and these responses were reversibly abolished by the selective TRPA1 antagonist A967079. Artemisinin also triggered whole-cell currents in HEK293T cells transiently transfected with human TRPA1, as well as in TRPA1-expressing DRG neurons, and these currents were inhibited by A967079. Interestingly, using human TRPA1 mutants, we demonstrate that artemisinin acts as a non-electrophilic agonist of TRPA1, activating the channel in a similar manner to carvacrol and menthol. These results may provide a better understanding of the biological actions of the very important antimalarial and anti-tumour agent artemisinin.
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Affiliation(s)
- Debora-Elena Huţanu
- Department of Anatomy, Physiology and Biophysics, Faculty of Biology, University of Bucharest, Splaiul Independenţei 91-95, 050095, Bucharest, Romania
| | - George Oprita
- Department of Anatomy, Physiology and Biophysics, Faculty of Biology, University of Bucharest, Splaiul Independenţei 91-95, 050095, Bucharest, Romania
| | - Dan Domocos
- Department of Anatomy, Physiology and Biophysics, Faculty of Biology, University of Bucharest, Splaiul Independenţei 91-95, 050095, Bucharest, Romania; Cell Signalling Research Group, Institute of Biochemistry of the Romanian Academy, Splaiul Independenţei 296, 060031, Bucharest, Romania
| | - Tudor Selescu
- Department of Anatomy, Physiology and Biophysics, Faculty of Biology, University of Bucharest, Splaiul Independenţei 91-95, 050095, Bucharest, Romania
| | - Alexandra Manolache
- Department of Anatomy, Physiology and Biophysics, Faculty of Biology, University of Bucharest, Splaiul Independenţei 91-95, 050095, Bucharest, Romania
| | - Teodora Stratulat
- Department of Anatomy, Physiology and Biophysics, Faculty of Biology, University of Bucharest, Splaiul Independenţei 91-95, 050095, Bucharest, Romania; Cell Signalling Research Group, Institute of Biochemistry of the Romanian Academy, Splaiul Independenţei 296, 060031, Bucharest, Romania
| | - Susanne K Sauer
- Institute of Physiology and Experimental Pathophysiology, Friedrich-Alexander University of Erlangen-Nuremberg, Universitaetsstrasse 17, 91054, Erlangen, Germany
| | - Sorin Tunaru
- Cell Signalling Research Group, Institute of Biochemistry of the Romanian Academy, Splaiul Independenţei 296, 060031, Bucharest, Romania
| | - Alexandru Babes
- Department of Anatomy, Physiology and Biophysics, Faculty of Biology, University of Bucharest, Splaiul Independenţei 91-95, 050095, Bucharest, Romania.
| | - Ramona-Madalina Babes
- Department of Biophysics, "Carol Davila" University of Medicine and Pharmacy, Str. Dionisie Lupu 37, 020021, Bucharest, Romania
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12
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Alcon C, Xiong TC. Calcium Live Imaging at Multi-Scales from Cellular to Organ Level in Arabidopsis thaliana. Methods Mol Biol 2023; 2642:85-95. [PMID: 36944873 DOI: 10.1007/978-1-0716-3044-0_4] [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] [Indexed: 04/27/2023]
Abstract
Plants must adapt to environmental constraints. For this, they are able to perceive several types of stress in isolation or in combination manner. At the cellular level, after the perception of stress, cell signaling is set up to allow the establishment of the specific response. The calcium ion is known to be one of the ubiquitous second messengers which is involved in most of the stresses perceived by the plant. Changes of free cytosolic calcium but also in other cellular compartments are able to activate or inactivate several mechanisms involved in the cell to cope with the changes of environmental conditions. Several calcium reporters have been intensively used to visualize calcium signals in different conditions. In this chapter, we will present only genetically encoded fluorescent reporters for calcium imaging in living plant tissues to measure variations in calcium at several scales. The FRET (fluorescence resonance energy transfer) YC3.60 and the intensiometric GCamP3 sensors will be used in this method chapter. The image analyses will be also detailed for fluorescence quantification of calcium variation.
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Affiliation(s)
- Carine Alcon
- IPSiM, Université de Montpellier, CNRS, INRAE, Montpellier, France
| | - Tou Cheu Xiong
- IPSiM, Université de Montpellier, CNRS, INRAE, Montpellier, France.
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13
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Zajac M, Modi S, Krishnan Y. The evolution of organellar calcium mapping technologies. Cell Calcium 2022; 108:102658. [PMID: 36274564 PMCID: PMC10224794 DOI: 10.1016/j.ceca.2022.102658] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 10/05/2022] [Accepted: 10/08/2022] [Indexed: 01/25/2023]
Abstract
Intracellular Ca2+ fluxes are dynamically controlled by the co-involvement of multiple organellar pools of stored Ca2+. Endolysosomes are emerging as physiologically critical, yet underexplored, sources and sinks of intracellular Ca2+. Delineating the role of organelles in Ca2+ signaling has relied on chemical fluorescent probes and electrophysiological strategies. However, the acidic endolysosomal environment presents unique issues, which preclude the use of traditional chemical reporter strategies to map lumenal Ca2+. Here, we broadly address the current state of knowledge about organellar Ca2+ pools. We then outline the application of traditional probes, and their sensing paradigms. We then discuss how a new generation of probes overcomes the limitations of traditional Ca2+probes, emphasizing their ability to offer critical insights into endolysosomal Ca2+, and its feedback with other organellar pools.
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Affiliation(s)
- Matthew Zajac
- Department of Chemistry, The University of Chicago, Chicago, Illinois, 60637, USA; Neuroscience Institute, The University of Chicago, Chicago, IL, 60637, USA
| | - Souvik Modi
- Esya Labs, Translation and Innovation Hub, Imperial College White City Campus, 84 Wood Lane, London, W12 0BZ, UK
| | - Yamuna Krishnan
- Department of Chemistry, The University of Chicago, Chicago, Illinois, 60637, USA; Neuroscience Institute, The University of Chicago, Chicago, IL, 60637, USA; Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois, 60637, USA.
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14
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Escudero Castelán N, Semmens DC, Guerra LAY, Zandawala M, Dos Reis M, Slade SE, Scrivens JH, Zampronio CG, Jones AM, Mirabeau O, Elphick MR. Receptor deorphanization in an echinoderm reveals kisspeptin evolution and relationship with SALMFamide neuropeptides. BMC Biol 2022; 20:187. [PMID: 36002813 PMCID: PMC9400282 DOI: 10.1186/s12915-022-01387-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 08/09/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Kisspeptins are neuropeptides that regulate reproductive maturation in mammals via G-protein-coupled receptor-mediated stimulation of gonadotropin-releasing hormone secretion from the hypothalamus. Phylogenetic analysis of kisspeptin-type receptors indicates that this neuropeptide signaling system originated in a common ancestor of the Bilateria, but little is known about kisspeptin signaling in invertebrates. RESULTS Contrasting with the occurrence of a single kisspeptin receptor in mammalian species, here, we report the discovery of an expanded family of eleven kisspeptin-type receptors in a deuterostome invertebrate - the starfish Asterias rubens (phylum Echinodermata). Furthermore, neuropeptides derived from four precursor proteins were identified as ligands for six of these receptors. One or more kisspeptin-like neuropeptides derived from two precursor proteins (ArKPP1, ArKPP2) act as ligands for four A. rubens kisspeptin-type receptors (ArKPR1,3,8,9). Furthermore, a family of neuropeptides that act as muscle relaxants in echinoderms (SALMFamides) are ligands for two A. rubens kisspeptin-type receptors (ArKPR6,7). The SALMFamide neuropeptide S1 (or ArS1.4) and a 'cocktail' of the seven neuropeptides derived from the S1 precursor protein (ArS1.1-ArS1.7) act as ligands for ArKPR7. The SALMFamide neuropeptide S2 (or ArS2.3) and a 'cocktail' of the eight neuropeptides derived from the S2 precursor protein (ArS2.1-ArS2.8) act as ligands for ArKPR6. CONCLUSIONS Our findings reveal a remarkable diversity of neuropeptides that act as ligands for kisspeptin-type receptors in starfish and provide important new insights into the evolution of kisspeptin signaling. Furthermore, the discovery of the hitherto unknown relationship of kisspeptins with SALMFamides, neuropeptides that were discovered in starfish prior to the identification of kisspeptins in mammals, presents a radical change in perspective for research on kisspeptin signaling.
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Affiliation(s)
- Nayeli Escudero Castelán
- Queen Mary University of London, School of Biological & Behavioural Sciences, London, E1 4NS, UK
| | - Dean C Semmens
- Queen Mary University of London, School of Biological & Behavioural Sciences, London, E1 4NS, UK
- Present address: Institute of Medical and Biomedical Education, St George's University of London, Cranmer Terrace, London, SW17 0RE, UK
| | - Luis Alfonso Yañez Guerra
- Queen Mary University of London, School of Biological & Behavioural Sciences, London, E1 4NS, UK
- Present Address: Living Systems Institute, University of Exeter, Exeter, EX4 4QD, UK
| | - Meet Zandawala
- Queen Mary University of London, School of Biological & Behavioural Sciences, London, E1 4NS, UK
- Present Address: Neurobiology and Genetics, Theodor-Boveri-Institute, Biocenter, University of Würzburg, 97074, Würzburg, Germany
| | - Mario Dos Reis
- Queen Mary University of London, School of Biological & Behavioural Sciences, London, E1 4NS, UK
| | - Susan E Slade
- School of Life Sciences, University of Warwick, Coventry, CV4 7AL, UK
- Present address: Waters Corporation, Stamford Avenue, Altrincham Road, Wilmslow, SK9 4AX, UK
| | - James H Scrivens
- School of Life Sciences, University of Warwick, Coventry, CV4 7AL, UK
- Present address: School of Science, Engineering & Design, Stephenson Street, Teesside University, Middlesbrough, TS1 3BX, TS1 3BA, Tees Valley, UK
| | | | - Alexandra M Jones
- School of Life Sciences, University of Warwick, Coventry, CV4 7AL, UK
| | - Olivier Mirabeau
- Institut Pasteur, Université Paris Cité, Bioinformatics and Biostatistics Hub, 75015, Paris, France
| | - Maurice R Elphick
- Queen Mary University of London, School of Biological & Behavioural Sciences, London, E1 4NS, UK.
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15
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Frighetto G, Zordan MA, Castiello U, Megighian A, Martin JR. Dopamine Modulation of Drosophila Ellipsoid Body Neurons, a Nod to the Mammalian Basal Ganglia. Front Physiol 2022; 13:849142. [PMID: 35492587 PMCID: PMC9048027 DOI: 10.3389/fphys.2022.849142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 03/10/2022] [Indexed: 12/04/2022] Open
Abstract
The central complex (CX) is a neural structure located on the midline of the insect brain that has been widely studied in the last few years. Its role in navigation and goal-oriented behaviors resembles those played by the basal ganglia in mammals. However, the neural mechanisms and the neurotransmitters involved in these processes remain unclear. Here, we exploited an in vivo bioluminescence Ca2+ imaging technique to record the activity in targeted neurons of the ellipsoid body (EB). We used different drugs to evoke excitatory Ca2+-responses, depending on the putative neurotransmitter released by their presynaptic inputs, while concomitant dopamine administration was employed to modulate those excitations. By using a genetic approach to knockdown the dopamine 1-like receptors, we showed that different dopamine modulatory effects are likely due to specific receptors expressed by the targeted population of neurons. Altogether, these results provide new data concerning how dopamine modulates and shapes the response of the ellipsoid body neurons. Moreover, they provide important insights regarding the similitude with mammals as far as the role played by dopamine in increasing and stabilizing the response of goal-related information.
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Affiliation(s)
- Giovanni Frighetto
- Department of General Psychology, University of Padova, Padova, Italy
- Institut des Neurosciences Paris-Saclay, Université Paris-Saclay, CNRS, Saclay, France
| | - Mauro A. Zordan
- Department of Biology, University of Padova, Padova, Italy
- Padova Neuroscience Center, University of Padova, Padova, Italy
| | - Umberto Castiello
- Department of General Psychology, University of Padova, Padova, Italy
| | - Aram Megighian
- Padova Neuroscience Center, University of Padova, Padova, Italy
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Jean-René Martin
- Institut des Neurosciences Paris-Saclay, Université Paris-Saclay, CNRS, Saclay, France
- *Correspondence: Jean-René Martin,
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16
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Erdenee E, Ting AY. A Dual-Purpose Real-Time Indicator and Transcriptional Integrator for Calcium Detection in Living Cells. ACS Synth Biol 2022; 11:1086-1095. [PMID: 35254056 PMCID: PMC10395047 DOI: 10.1021/acssynbio.1c00597] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Calcium is a ubiquitous second messenger in eukaryotes, correlated with neuronal activity and T-cell activation among other processes. Real-time calcium indicators such as GCaMP have recently been complemented by newer calcium integrators that convert transient calcium activity into stable gene expression. Here we introduce LuCID, a dual-purpose real-time calcium indicator and transcriptional calcium integrator that combines the benefits of both calcium detection technologies. We show that the calcium-dependent split luciferase component of LuCID provides a real-time bioluminescence readout of calcium dynamics in cells, while the GI/FKF1 split GAL4 component of LuCID converts calcium-generated bioluminescence into stable gene expression. We also show that LuCID's modular design enables it to read out other cellular events such as protein-protein interactions. LuCID adds to the arsenal of tools for studying cells and cell populations that utilize calcium for signaling.
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Affiliation(s)
- Elbegduuren Erdenee
- Department of Biology, Stanford University, Stanford, California 94305, United States
| | - Alice Y. Ting
- Department of Biology, Stanford University, Stanford, California 94305, United States
- Department of Genetics, Stanford University, Stanford, California 94305, United States
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
- Chan Zuckerberg Biohub, San Francisco, California 94158, United States
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17
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Larionova MD, Wu L, Eremeeva EV, Natashin PV, Gulnov DV, Nemtseva EV, Liu D, Liu Z, Vysotski ES. Crystal structure of semisynthetic obelin-v. Protein Sci 2022; 31:454-469. [PMID: 34802167 PMCID: PMC8819848 DOI: 10.1002/pro.4244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 11/11/2021] [Accepted: 11/12/2021] [Indexed: 02/03/2023]
Abstract
Coelenterazine-v (CTZ-v), a synthetic derivative with an additional benzyl ring, yields a bright bioluminescence of Renilla luciferase and its "yellow" mutant with a significant shift in the emission spectrum toward longer wavelengths, which makes it the substrate of choice for deep tissue imaging. Although Ca2+ -regulated photoproteins activated with CTZ-v also display red-shifted light emission, in contrast to Renilla luciferase their bioluminescence activities are very low, which makes photoproteins activated by CTZ-v unusable for calcium imaging. Here, we report the crystal structure of Ca2+ -regulated photoprotein obelin with 2-hydroperoxycoelenterazine-v (obelin-v) at 1.80 Å resolution. The structures of obelin-v and obelin bound with native CTZ revealed almost no difference; only the minor rearrangement in hydrogen-bond pattern and slightly increased distances between key active site residues and some atoms of 2-hydroperoxycoelenterazine-v were found. The fluorescence quantum yield (ΦFL ) of obelin bound with coelenteramide-v (0.24) turned out to be even higher than that of obelin with native coelenteramide (0.19). Since both obelins are in effect the enzyme-substrate complexes containing the 2-hydroperoxy adduct of CTZ-v or CTZ, we reasonably assume the chemical reaction mechanisms and the yields of the reaction products (ΦR ) to be similar for both obelins. Based on these findings we suggest that low bioluminescence activity of obelin-v is caused by the low efficiency of generating an electronic excited state (ΦS ). In turn, the low ΦS value as compared to that of native CTZ might be the result of small changes in the substrate microenvironment in the obelin-v active site.
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Affiliation(s)
- Marina D. Larionova
- Photobiology LaboratoryInstitute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”KrasnoyarskRussia,iHuman Institute, ShanghaiTech UniversityShanghaiChina
| | - Lijie Wu
- iHuman Institute, ShanghaiTech UniversityShanghaiChina
| | - Elena V. Eremeeva
- Photobiology LaboratoryInstitute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”KrasnoyarskRussia,Institute of Fundamental Biology and Biotechnology, Siberian Federal UniversityKrasnoyarskRussia
| | - Pavel V. Natashin
- Photobiology LaboratoryInstitute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”KrasnoyarskRussia
| | - Dmitry V. Gulnov
- Institute of Fundamental Biology and Biotechnology, Siberian Federal UniversityKrasnoyarskRussia
| | - Elena V. Nemtseva
- Photobiology LaboratoryInstitute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”KrasnoyarskRussia,Institute of Fundamental Biology and Biotechnology, Siberian Federal UniversityKrasnoyarskRussia
| | - Dongsheng Liu
- iHuman Institute, ShanghaiTech UniversityShanghaiChina
| | - Zhi‐Jie Liu
- iHuman Institute, ShanghaiTech UniversityShanghaiChina,School of Life Science and Technology, ShanghaiTech UniversityShanghaiChina
| | - Eugene S. Vysotski
- Photobiology LaboratoryInstitute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”KrasnoyarskRussia
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18
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Vicente M, Salgado-Almario J, Martínez-Sielva A, Llopis J, Domingo B. Optimized Aequorin Reconstitution Protocol to Visualize Calcium Ion Transients in the Heart of Transgenic Zebrafish Embryos In Vivo. Methods Mol Biol 2022; 2524:271-280. [PMID: 35821478 DOI: 10.1007/978-1-0716-2453-1_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We introduce how to image calcium ion levels in the heart of zebrafish embryos and larvae up to 5 days post-fertilization with the photoprotein green fluorescent protein (GFP)-aequorin (GA) in the transgenic line Tg(myl7:GA). Incubation of the embryos with CTZ to obtain the functional photoprotein yields few emission counts, suggesting that, when the heart is beating, the rate of aequorin consumption is faster than that of the reconstitution with CTZ. In this chapter, we present an improved aequorin reconstitution protocol. We further describe the experimental procedure as well as the bioluminescence data analysis and processing.
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Affiliation(s)
- Manuel Vicente
- Physiology and Cell Dynamics Group, Centro Regional de Investigaciones Biomédicas (CRIB) and Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, Albacete, Spain
| | - Jussep Salgado-Almario
- Physiology and Cell Dynamics Group, Centro Regional de Investigaciones Biomédicas (CRIB) and Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, Albacete, Spain
| | - Antonio Martínez-Sielva
- Physiology and Cell Dynamics Group, Centro Regional de Investigaciones Biomédicas (CRIB) and Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, Albacete, Spain
| | - Juan Llopis
- Physiology and Cell Dynamics Group, Centro Regional de Investigaciones Biomédicas (CRIB) and Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, Albacete, Spain
| | - Beatriz Domingo
- Physiology and Cell Dynamics Group, Centro Regional de Investigaciones Biomédicas (CRIB) and Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, Albacete, Spain.
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19
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G-protein-coupled receptor P2Y10 facilitates chemokine-induced CD4 T cell migration through autocrine/paracrine mediators. Nat Commun 2021; 12:6798. [PMID: 34815397 PMCID: PMC8611058 DOI: 10.1038/s41467-021-26882-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 10/25/2021] [Indexed: 12/12/2022] Open
Abstract
G-protein-coupled receptors (GPCRs), especially chemokine receptors, play a central role in the regulation of T cell migration. Various GPCRs are upregulated in activated CD4 T cells, including P2Y10, a putative lysophospholipid receptor that is officially still considered an orphan GPCR, i.e., a receptor with unknown endogenous ligand. Here we show that in mice lacking P2Y10 in the CD4 T cell compartment, the severity of experimental autoimmune encephalomyelitis and cutaneous contact hypersensitivity is reduced. P2Y10-deficient CD4 T cells show normal activation, proliferation and differentiation, but reduced chemokine-induced migration, polarization, and RhoA activation upon in vitro stimulation. Mechanistically, CD4 T cells release the putative P2Y10 ligands lysophosphatidylserine and ATP upon chemokine exposure, and these mediators induce P2Y10-dependent RhoA activation in an autocrine/paracrine fashion. ATP degradation impairs RhoA activation and migration in control CD4 T cells, but not in P2Y10-deficient CD4 T cells. Importantly, the P2Y10 pathway appears to be conserved in human T cells. Taken together, P2Y10 mediates RhoA activation in CD4 T cells in response to auto-/paracrine-acting mediators such as LysoPS and ATP, thereby facilitating chemokine-induced migration and, consecutively, T cell-mediated diseases.
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Yang J, Johnson CH. Bioluminescent Sensors for Ca ++ Flux Imaging and the Introduction of a New Intensity-Based Ca ++ Sensor. Front Bioeng Biotechnol 2021; 9:773353. [PMID: 34778237 PMCID: PMC8578923 DOI: 10.3389/fbioe.2021.773353] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 10/13/2021] [Indexed: 11/13/2022] Open
Abstract
Sensitive detection of biological events is a goal for the design and characterization of sensors that can be used in vitro and in vivo. One important second messenger is Ca++ which has been a focus of using genetically encoded Ca++ indicators (GECIs) within living cells or intact organisms in vivo. An ideal GECI would exhibit high signal intensity, excellent signal-to-noise ratio (SNR), rapid kinetics, a large dynamic range within relevant physiological conditions, and red-shifted emission. Most available GECIs are based on fluorescence, but bioluminescent GECIs have potential advantages in terms of avoiding tissue autofluorescence, phototoxicity, photobleaching, and spectral overlap, as well as enhancing SNR. Here, we summarize current progress in the development of bioluminescent GECIs and introduce a new and previously unpublished biosensor. Because these biosensors require a substrate, we also describe the pros and cons of various substrates used with these sensors. The novel GECI that is introduced here is called CalBiT, and it is a Ca++ indicator based on the functional complementation of NanoBiT which shows a high dynamic change in response to Ca++ fluxes. Here, we use CalBiT for the detection of Ca++ fluctuations in cultured cells, including its ability for real-time imaging in living cells.
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Affiliation(s)
- Jie Yang
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Wuhan, China
| | - Carl Hirschie Johnson
- Department of Biological Sciences, Vanderbilt University, Nashville, TN, United States
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21
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Grenzi M, Resentini F, Vanneste S, Zottini M, Bassi A, Costa A. Illuminating the hidden world of calcium ions in plants with a universe of indicators. PLANT PHYSIOLOGY 2021; 187:550-571. [PMID: 35237821 PMCID: PMC8491032 DOI: 10.1093/plphys/kiab339] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 07/15/2021] [Indexed: 05/20/2023]
Abstract
The tools available to carry out in vivo analysis of Ca2+ dynamics in plants are powerful and mature technologies that still require the proper controls.
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Affiliation(s)
- Matteo Grenzi
- Department of Biosciences, University of Milan, 20133 Milano, Italy
| | | | - Steffen Vanneste
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
- Department of Plants and Crops, Ghent University, 9000 Ghent, Belgium
- Laboratory of Plant Growth Analysis, Ghent University Global Campus, Incheon 21985, South Korea
| | - Michela Zottini
- Department of Biology, University of Padova, 35131 Padova, Italy
| | - Andrea Bassi
- Department of Physics, Politecnico di Milano, 20133 Milano, Italy
- Institute of Photonics and Nanotechnologies, National Research Council of Italy (CNR), 20133 Milano, Italy
| | - Alex Costa
- Department of Biosciences, University of Milan, 20133 Milano, Italy
- Institute of Biophysics, National Research Council of Italy (CNR), 20133 Milano, Italy
- Author for communication:
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22
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Vicente M, Salgado-Almario J, Collins MM, Martínez-Sielva A, Minoshima M, Kikuchi K, Domingo B, Llopis J. Cardioluminescence in Transgenic Zebrafish Larvae: A Calcium Imaging Tool to Study Drug Effects and Pathological Modeling. Biomedicines 2021; 9:biomedicines9101294. [PMID: 34680411 PMCID: PMC8533351 DOI: 10.3390/biomedicines9101294] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/07/2021] [Accepted: 09/20/2021] [Indexed: 01/12/2023] Open
Abstract
Zebrafish embryos and larvae have emerged as an excellent model in cardiovascular research and are amenable to live imaging with genetically encoded biosensors to study cardiac cell behaviours, including calcium dynamics. To monitor calcium ion levels in three to five days post-fertilization larvae, we have used bioluminescence. We generated a transgenic line expressing GFP-aequorin in the heart, Tg(myl7:GA), and optimized a reconstitution protocol to boost aequorin luminescence. The analogue diacetylh-coelenterazine enhanced light output and signal-to-noise ratio. With this cardioluminescence model, we imaged the time-averaged calcium levels and beat-to-beat calcium oscillations continuously for hours. As a proof-of-concept of the transgenic line, changes in ventricular calcium levels were observed by Bay K8644, an L-type calcium channel activator and with the blocker nifedipine. The β-adrenergic blocker propranolol decreased calcium levels, heart rate, stroke volume, and cardiac output, suggesting that larvae have a basal adrenergic tone. Zebrafish larvae treated with terfenadine for 24 h have been proposed as a model of heart failure. Tg(myl7:GA) larvae treated with terfenadine showed bradycardia, 2:1 atrioventricular block, decreased time-averaged ventricular calcium levels but increased calcium transient amplitude, and reduced cardiac output. As alterations of calcium signalling are involved in the pathogenesis of heart failure and arrhythmia, the GFP-aequorin transgenic line provides a powerful platform for understanding calcium dynamics.
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Affiliation(s)
- Manuel Vicente
- Physiology and Cell Dynamics Group, Centro Regional de Investigaciones Biomédicas (CRIB) and Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, C/Almansa 14, 02006 Albacete, Spain; (M.V.); (J.S.-A.); (A.M.-S.)
| | - Jussep Salgado-Almario
- Physiology and Cell Dynamics Group, Centro Regional de Investigaciones Biomédicas (CRIB) and Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, C/Almansa 14, 02006 Albacete, Spain; (M.V.); (J.S.-A.); (A.M.-S.)
| | - Michelle M. Collins
- Department of Anatomy, Physiology, and Pharmacology, College of Medicine, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada;
| | - Antonio Martínez-Sielva
- Physiology and Cell Dynamics Group, Centro Regional de Investigaciones Biomédicas (CRIB) and Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, C/Almansa 14, 02006 Albacete, Spain; (M.V.); (J.S.-A.); (A.M.-S.)
| | - Masafumi Minoshima
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan; (M.M.); (K.K.)
| | - Kazuya Kikuchi
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan; (M.M.); (K.K.)
- WPI-Immunology Frontier Research Center, Osaka University, Suita, Osaka 565-0871, Japan
| | - Beatriz Domingo
- Physiology and Cell Dynamics Group, Centro Regional de Investigaciones Biomédicas (CRIB) and Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, C/Almansa 14, 02006 Albacete, Spain; (M.V.); (J.S.-A.); (A.M.-S.)
- Correspondence: (B.D.); (J.L.); Tel.: +34-967-599-315 (J.L.); +34-967-599-200 (ext. 2686) (B.D.)
| | - Juan Llopis
- Physiology and Cell Dynamics Group, Centro Regional de Investigaciones Biomédicas (CRIB) and Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, C/Almansa 14, 02006 Albacete, Spain; (M.V.); (J.S.-A.); (A.M.-S.)
- Correspondence: (B.D.); (J.L.); Tel.: +34-967-599-315 (J.L.); +34-967-599-200 (ext. 2686) (B.D.)
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23
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Tinoco AB, Barreiro-Iglesias A, Yañez Guerra LA, Delroisse J, Zhang Y, Gunner EF, Zampronio CG, Jones AM, Egertová M, Elphick MR. Ancient role of sulfakinin/cholecystokinin-type signalling in inhibitory regulation of feeding processes revealed in an echinoderm. eLife 2021; 10:e65667. [PMID: 34488941 PMCID: PMC8428848 DOI: 10.7554/elife.65667] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 08/18/2021] [Indexed: 01/04/2023] Open
Abstract
Sulfakinin (SK)/cholecystokinin (CCK)-type neuropeptides regulate feeding and digestion in protostomes (e.g. insects) and chordates. Here, we characterised SK/CCK-type signalling for the first time in a non-chordate deuterostome - the starfish Asterias rubens (phylum Echinodermata). In this species, two neuropeptides (ArSK/CCK1, ArSK/CCK2) derived from the precursor protein ArSK/CCKP act as ligands for an SK/CCK-type receptor (ArSK/CCKR) and these peptides/proteins are expressed in the nervous system, digestive system, tube feet, and body wall. Furthermore, ArSK/CCK1 and ArSK/CCK2 cause dose-dependent contraction of cardiac stomach, tube foot, and apical muscle preparations in vitro, and injection of these neuropeptides in vivo triggers cardiac stomach retraction and inhibition of the onset of feeding in A. rubens. Thus, an evolutionarily ancient role of SK/CCK-type neuropeptides as inhibitory regulators of feeding-related processes in the Bilateria has been conserved in the unusual and unique context of the extra-oral feeding behaviour and pentaradial body plan of an echinoderm.
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Affiliation(s)
- Ana B Tinoco
- Queen Mary University of London, School of Biological & Behavioural SciencesLondonUnited Kingdom
| | - Antón Barreiro-Iglesias
- Queen Mary University of London, School of Biological & Behavioural SciencesLondonUnited Kingdom
| | | | - Jérôme Delroisse
- Queen Mary University of London, School of Biological & Behavioural SciencesLondonUnited Kingdom
| | - Ya Zhang
- Queen Mary University of London, School of Biological & Behavioural SciencesLondonUnited Kingdom
| | - Elizabeth F Gunner
- Queen Mary University of London, School of Biological & Behavioural SciencesLondonUnited Kingdom
| | - Cleidiane G Zampronio
- School of Life Sciences and Proteomics, Research Technology Platform, University of WarwickCoventryUnited Kingdom
| | - Alexandra M Jones
- School of Life Sciences and Proteomics, Research Technology Platform, University of WarwickCoventryUnited Kingdom
| | - Michaela Egertová
- Queen Mary University of London, School of Biological & Behavioural SciencesLondonUnited Kingdom
| | - Maurice R Elphick
- Queen Mary University of London, School of Biological & Behavioural SciencesLondonUnited Kingdom
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Zhu D, Feng L, Feliu N, Guse AH, Parak WJ. Stimulation of Local Cytosolic Calcium Release by Photothermal Heating for Studying Intra- and Intercellular Calcium Waves. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2008261. [PMID: 33949733 DOI: 10.1002/adma.202008261] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 02/16/2021] [Indexed: 06/12/2023]
Abstract
A methodology is described that allows for localized Ca2+ release by photoexcitation. For this, cells are loaded with polymer capsules with integrated plasmonic nanoparticles, which reside in endo-lysosomes. The micrometer-sized capsules can be individually excited by near-infrared light from a light pointer, causing photothermal heating, upon which there is a rise in the free cytosolic Ca2+ concentration ([Ca2+ ]i ). The [Ca2+ ]i can be analyzed with a Ca2+ indicator fluorophore. In this way, it is possible to excite local lysosomal Ca2+ release in a desired target cell.
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Affiliation(s)
- Dingcheng Zhu
- Fachbereich Physik, CHyN, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Yuhangtang road 2318, Hangzhou, 311121, China
| | - Lili Feng
- Fachbereich Physik, CHyN, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Neus Feliu
- Fachbereich Physik, CHyN, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
- CAN, Fraunhofer Institut, Grindelallee 117, 20146, Hamburg, Germany
| | - Andreas H Guse
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Wolfgang J Parak
- Fachbereich Physik, CHyN, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
- National Engineering Center for Nanotechnology (NECN), Shanghai Jiao Tong University, Dongchuan road 800, Shanghai, 200240, China
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25
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GPR182 is an endothelium-specific atypical chemokine receptor that maintains hematopoietic stem cell homeostasis. Proc Natl Acad Sci U S A 2021; 118:2021596118. [PMID: 33875597 PMCID: PMC8092405 DOI: 10.1073/pnas.2021596118] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
G protein–coupled receptors (GPCRs) are important regulators of cellular and biological functions and are primary targets of therapeutic drugs. About 100 mammalian GPCRs are still considered orphan receptors because they lack a known endogenous ligand. We report the deorphanization of GPR182, which is expressed in endothelial cells of the microvasculature. We show that GPR182 is an atypical chemokine receptor, which binds CXCL10, 12, and 13. However, binding does not induce downstream signaling. Consistent with a scavenging function of GPR182, mice lacking GPR182 have increased plasma levels of chemokines. In line with the crucial role of CXCL12 in hematopoietic stem cell homeostasis, we found that loss of GPR182 results in increased egress of hematopoietic stem cells from the bone marrow. G protein–coupled receptor 182 (GPR182) has been shown to be expressed in endothelial cells; however, its ligand and physiological role has remained elusive. We found GPR182 to be expressed in microvascular and lymphatic endothelial cells of most organs and to bind with nanomolar affinity the chemokines CXCL10, CXCL12, and CXCL13. In contrast to conventional chemokine receptors, binding of chemokines to GPR182 did not induce typical downstream signaling processes, including Gq- and Gi-mediated signaling or β-arrestin recruitment. GPR182 showed relatively high constitutive activity in regard to β-arrestin recruitment and rapidly internalized in a ligand-independent manner. In constitutive GPR182-deficient mice, as well as after induced endothelium-specific loss of GPR182, we found significant increases in the plasma levels of CXCL10, CXCL12, and CXCL13. Global and induced endothelium-specific GPR182-deficient mice showed a significant decrease in hematopoietic stem cells in the bone marrow as well as increased colony-forming units of hematopoietic progenitors in the blood and the spleen. Our data show that GPR182 is a new atypical chemokine receptor for CXCL10, CXCL12, and CXCL13, which is involved in the regulation of hematopoietic stem cell homeostasis.
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26
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Kim N, Shin S, Bae SW. cAMP Biosensors Based on Genetically Encoded Fluorescent/Luminescent Proteins. BIOSENSORS-BASEL 2021; 11:bios11020039. [PMID: 33572585 PMCID: PMC7911721 DOI: 10.3390/bios11020039] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 01/22/2021] [Accepted: 01/27/2021] [Indexed: 02/06/2023]
Abstract
Cyclic adenosine monophosphate (cAMP) plays a key role in signal transduction pathways as a second messenger. Studies on the cAMP dynamics provided useful scientific insights for drug development and treatment of cAMP-related diseases such as some cancers and prefrontal cortex disorders. For example, modulation of cAMP-mediated intracellular signaling pathways by anti-tumor drugs could reduce tumor growth. However, most early stage tools used for measuring the cAMP level in living organisms require cell disruption, which is not appropriate for live cell imaging or animal imaging. Thus, in the last decades, tools were developed for real-time monitoring of cAMP distribution or signaling dynamics in a non-invasive manner. Genetically-encoded sensors based on fluorescent proteins and luciferases could be powerful tools to overcome these drawbacks. In this review, we discuss the recent genetically-encoded cAMP sensors advances, based on single fluorescent protein (FP), Föster resonance energy transfer (FRET), single luciferase, and bioluminescence resonance energy transfer (BRET) for real-time non-invasive imaging.
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Affiliation(s)
- Namdoo Kim
- Department of Chemistry, Kongju National University, Gongju 32588, Korea;
| | - Seunghan Shin
- Green Chemistry & Materials Group, Korea Institute of Industrial Technology (KITECH), Cheonan 31056, Korea;
| | - Se Won Bae
- Green Chemistry & Materials Group, Korea Institute of Industrial Technology (KITECH), Cheonan 31056, Korea;
- Department of Chemistry and Cosmetics, Jeju National University, Jeju 63243, Korea
- Correspondence: ; Tel.: +82-64-754-3543
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27
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RedquorinXS Mutants with Enhanced Calcium Sensitivity and Bioluminescence Output Efficiently Report Cellular and Neuronal Network Activities. Int J Mol Sci 2020; 21:ijms21217846. [PMID: 33105848 PMCID: PMC7660078 DOI: 10.3390/ijms21217846] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 10/16/2020] [Accepted: 10/19/2020] [Indexed: 01/14/2023] Open
Abstract
Considerable efforts have been focused on shifting the wavelength of aequorin Ca2+-dependent blue bioluminescence through fusion with fluorescent proteins. This approach has notably yielded the widely used GFP-aequorin (GA) Ca2+ sensor emitting green light, and tdTomato-aequorin (Redquorin), whose bioluminescence is completely shifted to red, but whose Ca2+ sensitivity is low. In the present study, the screening of aequorin mutants generated at twenty-four amino acid positions in and around EF-hand Ca2+-binding domains resulted in the isolation of six aequorin single or double mutants (AequorinXS) in EF2, EF3, and C-terminal tail, which exhibited markedly higher Ca2+ sensitivity than wild-type aequorin in vitro. The corresponding Redquorin mutants all showed higher Ca2+ sensitivity than wild-type Redquorin, and four of them (RedquorinXS) matched the Ca2+ sensitivity of GA in vitro. RedquorinXS mutants exhibited unaltered thermostability and peak emission wavelengths. Upon stable expression in mammalian cell line, all RedquorinXS mutants reported the activation of the P2Y2 receptor by ATP with higher sensitivity and assay robustness than wt-Redquorin, and one, RedquorinXS-Q159T, outperformed GA. Finally, wide-field bioluminescence imaging in mouse neocortical slices showed that RedquorinXS-Q159T and GA similarly reported neuronal network activities elicited by the removal of extracellular Mg2+. Our results indicate that RedquorinXS-Q159T is a red light-emitting Ca2+ sensor suitable for the monitoring of intracellular signaling in a variety of applications in cells and tissues, and is a promising candidate for the transcranial monitoring of brain activities in living mice.
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Zhang Y, Yañez Guerra LA, Egertová M, Zampronio CG, Jones AM, Elphick MR. Molecular and functional characterization of somatostatin-type signalling in a deuterostome invertebrate. Open Biol 2020; 10:200172. [PMID: 32898470 PMCID: PMC7536072 DOI: 10.1098/rsob.200172] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Somatostatin (SS) and allatostatin-C (ASTC) are structurally and evolutionarily related neuropeptides that act as inhibitory regulators of physiological processes in mammals and insects, respectively. Here, we report the first molecular and functional characterization of SS/ASTC-type signalling in a deuterostome invertebrate—the starfish Asterias rubens (phylum Echinodermata). Two SS/ASTC-type precursors were identified in A. rubens (ArSSP1 and ArSSP2) and the structures of neuropeptides derived from these proteins (ArSS1 and ArSS2) were analysed using mass spectrometry. Pharmacological characterization of three cloned A. rubens SS/ASTC-type receptors (ArSSR1–3) revealed that ArSS2, but not ArSS1, acts as a ligand for all three receptors. Analysis of ArSS2 expression in A. rubens using mRNA in situ hybridization and immunohistochemistry revealed stained cells/fibres in the central nervous system, the digestive system (e.g. cardiac stomach) and the body wall and its appendages (e.g. tube feet). Furthermore, in vitro pharmacological tests revealed that ArSS2 causes dose-dependent relaxation of tube foot and cardiac stomach preparations, while injection of ArSS2 in vivo causes partial eversion of the cardiac stomach. Our findings provide new insights into the molecular evolution of SS/ASTC-type signalling in the animal kingdom and reveal an ancient role of SS-type neuropeptides as inhibitory regulators of muscle contractility.
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Affiliation(s)
- Ya Zhang
- School of Biological and Chemical Sciences, Queen Mary University of London, London E1 4NS, UK
| | | | - Michaela Egertová
- School of Biological and Chemical Sciences, Queen Mary University of London, London E1 4NS, UK
| | - Cleidiane G Zampronio
- School of Life Sciences and Proteomics Research Technology Platform, University of Warwick, Coventry CV4 7AL, UK
| | - Alexandra M Jones
- School of Life Sciences and Proteomics Research Technology Platform, University of Warwick, Coventry CV4 7AL, UK
| | - Maurice R Elphick
- School of Biological and Chemical Sciences, Queen Mary University of London, London E1 4NS, UK
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Mayer C, Preuss B, Grottenthaler J, Berg C, Klein R. Antibodies to the Muscarinic Acetylcholine Receptor M3 in Primary Biliary Cholangitis Inhibit Receptor Function on Cholangiocytes. Front Immunol 2020; 11:1151. [PMID: 32695096 PMCID: PMC7339122 DOI: 10.3389/fimmu.2020.01151] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Accepted: 05/11/2020] [Indexed: 01/04/2023] Open
Abstract
Background and Aims: In primary biliary cholangitis (PBC), antibodies to a peptide of the muscarinic acetylcholine receptor 3 (mAChR3) have been described. Since the mAChR3 is expressed on cholangiocytes and mAChR3-signaling is involved in the pathogenesis of chronic inflammatory biliary diseases, we wanted to investigate whether anti-mAChR3-antibodies influence the function of the receptor and the proliferative response of cholangiocytes. Methods: Immunoglobulins were isolated by ammonium sulfate precipitation using sera from patients with PBC (n = 63) and with other chronic liver disorders (n = 150). All immunoglobulins were analyzed by a luminometric assay using Chinese hamster ovary (CHO) cells overexpressing the mAChR3 and cholangiocytes (TFK-1-cells) expressing the receptor constitutively. Cell proliferation was measured by 3H-thymidine assay. PBC patients were also analyzed in the follow-up. Results: Antibodies inhibiting the mAChR3 were found in 49 and 79% of PBC patients using CHO-cells or TFK-1-cells, respectively, but only in up to 26% of controls (p < 0.01). Stimulatory antibodies were hardly detected. Antibody reactivity only marginally changed during the course of the disease, independently of the choice of treatment (ursodeoxycholic acid, immunosuppressive therapy, or no medication). There was no correlation with laboratory, clinical or histological parameters, but the antibodies were more frequently found in PBC patients with a benign course (96%) than in patients with active disease progressing to late stages within 10 years (57%; p < 0.01). Proliferation of cells was not influenced by immunoglobulins from PBC-patients. Conclusion: Sera from patients with PBC contain inhibitory antibodies to the mAChR3 on cholangiocytes (TFK-1 cells) without influencing TFK-1-cell proliferation. These antibodies were predominantly observed in patients with non-progressing PBC.
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Affiliation(s)
- Christian Mayer
- Department of Internal Medicine II, University of Tuebingen, Tübingen, Germany
| | - Beate Preuss
- Department of Internal Medicine II, University of Tuebingen, Tübingen, Germany
| | - Julia Grottenthaler
- Department of Internal Medicine I, University of Tuebingen, Tübingen, Germany
| | - Christoph Berg
- Department of Internal Medicine I, University of Tuebingen, Tübingen, Germany
| | - Reinhild Klein
- Department of Internal Medicine II, University of Tuebingen, Tübingen, Germany
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30
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Yañez-Guerra LA, Zhong X, Moghul I, Butts T, Zampronio CG, Jones AM, Mirabeau O, Elphick MR. Echinoderms provide missing link in the evolution of PrRP/sNPF-type neuropeptide signalling. eLife 2020; 9:57640. [PMID: 32579512 PMCID: PMC7314547 DOI: 10.7554/elife.57640] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 06/12/2020] [Indexed: 12/22/2022] Open
Abstract
Neuropeptide signalling systems comprising peptide ligands and cognate receptors are evolutionarily ancient regulators of physiology and behaviour. However, there are challenges associated with determination of orthology between neuropeptides in different taxa. Orthologs of vertebrate neuropeptide-Y (NPY) known as neuropeptide-F (NPF) have been identified in protostome invertebrates, whilst prolactin-releasing peptide (PrRP) and short neuropeptide-F (sNPF) have been identified as paralogs of NPY/NPF in vertebrates and protostomes, respectively. Here we investigated the occurrence of NPY/NPF/PrRP/sNPF-related signalling systems in a deuterostome invertebrate phylum - the Echinodermata. Analysis of transcriptome/genome sequence data revealed loss of NPY/NPF-type signalling, but orthologs of PrRP-type neuropeptides and sNPF/PrRP-type receptors were identified in echinoderms. Furthermore, experimental studies revealed that the PrRP-type neuropeptide pQDRSKAMQAERTGQLRRLNPRF-NH2 is a potent ligand for a sNPF/PrRP-type receptor in the starfish Asterias rubens. Our findings indicate that PrRP-type and sNPF-type signalling systems are orthologous and originated as a paralog of NPY/NPF-type signalling in Urbilateria.
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Affiliation(s)
| | - Xingxing Zhong
- Queen Mary University of London, School of Biological and Chemical Sciences, London, United Kingdom
| | - Ismail Moghul
- Queen Mary University of London, School of Biological and Chemical Sciences, London, United Kingdom
| | - Thomas Butts
- Queen Mary University of London, School of Biological and Chemical Sciences, London, United Kingdom
| | - Cleidiane G Zampronio
- School of Life Sciences and Proteomics Research Technology Platform, University of Warwick, Coventry, United Kingdom
| | - Alexandra M Jones
- School of Life Sciences and Proteomics Research Technology Platform, University of Warwick, Coventry, United Kingdom
| | | | - Maurice R Elphick
- Queen Mary University of London, School of Biological and Chemical Sciences, London, United Kingdom
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31
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Boschiero C, Lundquist PK, Roy S, Dai X, Zhao PX, Scheible WR. Identification and Functional Investigation of Genome-Encoded, Small, Secreted Peptides in Plants. ACTA ACUST UNITED AC 2020; 4:e20098. [PMID: 31479208 DOI: 10.1002/cppb.20098] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Hundreds to thousands of small secreted peptides (SSPs) are encoded in plant genomes but have been overlooked, and most remain unannotated and unstudied. Despite their low profile, they have been found to confer dramatic effects on growth and development of plants. With the growing appreciation of their significance, the development of appropriate methods to identify and functionally assess the myriad SSPs encoded in plant genomes has become critical. Here, we provide protocols for the computational and physiological analysis of SSPs in plant genomes. We first describe our methodology successfully used for genome-wide identification and annotation of SSP-coding genes in the model legume Medicago truncatula, which can be readily adapted for other plant species. We then provide protocols for the functional analysis of SSPs using various synthetic peptide screens. Considerations for the design and handling of peptides are included. © 2019 by John Wiley & Sons, Inc.
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Affiliation(s)
| | - Peter K Lundquist
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan.,Plant Resilience Institute, Michigan State University, East Lansing, Michigan
| | - Sonali Roy
- Noble Research Institute, LLC, Ardmore, Oklahoma
| | - Xinbin Dai
- Noble Research Institute, LLC, Ardmore, Oklahoma
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Sahihi M, Sanz García J, Navizet I. Bioluminescent Nanoluciferase–Furimamide Complex: A Theoretical Study on Different Protonation States. J Phys Chem B 2020; 124:2539-2548. [DOI: 10.1021/acs.jpcb.9b11597] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Mehdi Sahihi
- MSME, Univ Gustave Eiffel, UPEC, CNRS, F-77454 Marne-la-Vallée, France
| | - Juan Sanz García
- MSME, Univ Gustave Eiffel, UPEC, CNRS, F-77454 Marne-la-Vallée, France
| | - Isabelle Navizet
- MSME, Univ Gustave Eiffel, UPEC, CNRS, F-77454 Marne-la-Vallée, France
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A G protein-coupled receptor mediates neuropeptide-induced oocyte maturation in the jellyfish Clytia. PLoS Biol 2020; 18:e3000614. [PMID: 32126082 PMCID: PMC7053711 DOI: 10.1371/journal.pbio.3000614] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 01/28/2020] [Indexed: 12/12/2022] Open
Abstract
The reproductive hormones that trigger oocyte meiotic maturation and release from the ovary vary greatly between animal species. Identification of receptors for these maturation-inducing hormones (MIHs) and understanding how they initiate the largely conserved maturation process remain important challenges. In hydrozoan cnidarians including the jellyfish Clytia hemisphaerica, MIH comprises neuropeptides released from somatic cells of the gonad. We identified the receptor (MIHR) for these MIH neuropeptides in Clytia using cell culture–based “deorphanization” of candidate oocyte-expressed G protein–coupled receptors (GPCRs). MIHR mutant jellyfish generated using CRISPR-Cas9 editing had severe defects in gamete development or in spawning both in males and females. Female gonads, or oocytes isolated from MIHR mutants, failed to respond to synthetic MIH. Treatment with the cAMP analogue Br-cAMP to mimic cAMP rise at maturation onset rescued meiotic maturation and spawning. Injection of inhibitory antibodies to the alpha subunit of the Gs heterodimeric protein (GαS) into wild-type oocytes phenocopied the MIHR mutants. These results provide the molecular links between MIH stimulation and meiotic maturation initiation in hydrozoan oocytes. Molecular phylogeny grouped Clytia MIHR with a subset of bilaterian neuropeptide receptors, including neuropeptide Y, gonadotropin inhibitory hormone (GnIH), pyroglutamylated RFamide, and luqin, all upstream regulators of sexual reproduction. This identification and functional characterization of a cnidarian peptide GPCR advances our understanding of oocyte maturation initiation and sheds light on the evolution of neuropeptide-hormone systems. A study of jellyfish oocytes identifies the receptor for Maturation-Inducing Hormone, the neuropeptide hormone that triggers oocyte maturation and spawning via GαS and cyclic AMP. This receptor defines a superfamily of hormone-receptor systems involved in regulating sexual reproduction across animal species.
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Burakova LP, Eremeeva EV, Vysotski ES. The interaction of C-terminal Tyr208 and Tyr13 of the first α-helix ensures a closed conformation of ctenophore photoprotein berovin. Photochem Photobiol Sci 2020; 19:313-323. [PMID: 32057065 DOI: 10.1039/c9pp00436j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Light-sensitive Ca2+-regulated photoprotein berovin is responsible for the bioluminescence of the ctenophore Beroe abyssicola. It shares many properties of hydromedusan photoproteins although the degree of identity of its amino acid sequence with those of photoproteins is low. There is a hydrogen bond between C-terminal Pro and Arg situated in the N-terminal α-helix of hydromedusan photoproteins that supports a closed conformation of the internal cavity of the photoprotein molecule with bound 2-hydroperoxycoelenterazine. The C- and N-terminal hydrogen bond network is necessary to properly isolate the photoprotein active site from the solvent and consequently to provide a high quantum yield of the bioluminescence reaction. In order to find out which berovin residues perform the same function we modified the N- and C-termini of the protein by replacing or deleting various amino acid residues. The studies on berovin mutants showed that the interaction between C-terminal Tyr208 and Tyr13 localized in the first α-helix of the photoprotein is important for the stabilization and proper orientation of the oxygenated coelenterazine adduct within the internal cavity as well as for supporting the closed photoprotein conformation. We also suggest that the interplay between Tyr residues in ctenophore photoproteins occurs rather through the π-π interaction of their phenyl rings than through hydrogen bonds as in hydromedusan photoproteins.
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Affiliation(s)
- Ludmila P Burakova
- Photobiology Laboratory, Institute of Biophysics SB RAS, Federal Research Center "Krasnoyarsk Science Center SB RAS", Krasnoyarsk, Russia
| | - Elena V Eremeeva
- Photobiology Laboratory, Institute of Biophysics SB RAS, Federal Research Center "Krasnoyarsk Science Center SB RAS", Krasnoyarsk, Russia
| | - Eugene S Vysotski
- Photobiology Laboratory, Institute of Biophysics SB RAS, Federal Research Center "Krasnoyarsk Science Center SB RAS", Krasnoyarsk, Russia.
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Abstract
The zebrafish (Danio rerio) has emerged as a widely used model system during the last four decades. The fact that the zebrafish larva is transparent enables sophisticated in vivo imaging, including calcium imaging of intracellular transients in many different tissues. While being a vertebrate, the reduced complexity of its nervous system and small size make it possible to follow large-scale activity in the whole brain. Its genome is sequenced and many genetic and molecular tools have been developed that simplify the study of gene function in health and disease. Since the mid 90's, the development and neuronal function of the embryonic, larval, and later, adult zebrafish have been studied using calcium imaging methods. This updated chapter is reviewing the advances in methods and research findings of zebrafish calcium imaging during the last decade. The choice of calcium indicator depends on the desired number of cells to study and cell accessibility. Synthetic calcium indicators, conjugated to dextrans and acetoxymethyl (AM) esters, are still used to label specific neuronal cell types in the hindbrain and the olfactory system. However, genetically encoded calcium indicators, such as aequorin and the GCaMP family of indicators, expressed in various tissues by the use of cell-specific promoters, are now the choice for most applications, including brain-wide imaging. Calcium imaging in the zebrafish has contributed greatly to our understanding of basic biological principles during development and adulthood, and the function of disease-related genes in a vertebrate system.
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36
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Vicente M, Salgado-Almario J, Soriano J, Burgos M, Domingo B, Llopis J. Visualization of Mitochondrial Ca 2+ Signals in Skeletal Muscle of Zebrafish Embryos with Bioluminescent Indicators. Int J Mol Sci 2019; 20:ijms20215409. [PMID: 31671636 PMCID: PMC6862566 DOI: 10.3390/ijms20215409] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 10/25/2019] [Accepted: 10/28/2019] [Indexed: 01/16/2023] Open
Abstract
Mitochondria are believed to play an important role in shaping the intracellular Ca2+ transients during skeletal muscle contraction. There is discussion about whether mitochondrial matrix Ca2+ dynamics always mirror the cytoplasmic changes and whether this happens in vivo in whole organisms. In this study, we characterized cytosolic and mitochondrial Ca2+ signals during spontaneous skeletal muscle contractions in zebrafish embryos expressing bioluminescent GFP-aequorin (GA, cytoplasm) and mitoGFP-aequorin (mitoGA, trapped in the mitochondrial matrix). The Ca2+ transients measured with GA and mitoGA reflected contractions of the trunk observed by transmitted light. The mitochondrial uncoupler FCCP and the inhibitor of the mitochondrial calcium uniporter (MCU), DS16570511, abolished mitochondrial Ca2+ transients whereas they increased the frequency of cytosolic Ca2+ transients and muscle contractions, confirming the subcellular localization of mitoGA. Mitochondrial Ca2+ dynamics were also determined with mitoGA and were found to follow closely cytoplasmic changes, with a slower decay. Cytoplasmic Ca2+ kinetics and propagation along the trunk and tail were characterized with GA and with the genetically encoded fluorescent Ca2+ indicator, Twitch-4. Although fluorescence provided a better spatio-temporal resolution, GA was able to resolve the same kinetic parameters while allowing continuous measurements for hours.
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Affiliation(s)
- Manuel Vicente
- Physiology and Cell Dynamics Group, Centro Regional de Investigaciones Biomédicas (CRIB) and Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, C/Almansa 14, 02006 Albacete, Spain.
| | - Jussep Salgado-Almario
- Physiology and Cell Dynamics Group, Centro Regional de Investigaciones Biomédicas (CRIB) and Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, C/Almansa 14, 02006 Albacete, Spain.
| | - Joaquim Soriano
- Physiology and Cell Dynamics Group, Centro Regional de Investigaciones Biomédicas (CRIB) and Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, C/Almansa 14, 02006 Albacete, Spain.
| | - Miguel Burgos
- Physiology and Cell Dynamics Group, Centro Regional de Investigaciones Biomédicas (CRIB) and Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, C/Almansa 14, 02006 Albacete, Spain.
| | - Beatriz Domingo
- Physiology and Cell Dynamics Group, Centro Regional de Investigaciones Biomédicas (CRIB) and Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, C/Almansa 14, 02006 Albacete, Spain.
| | - Juan Llopis
- Physiology and Cell Dynamics Group, Centro Regional de Investigaciones Biomédicas (CRIB) and Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, C/Almansa 14, 02006 Albacete, Spain.
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37
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Odekunle EA, Semmens DC, Martynyuk N, Tinoco AB, Garewal AK, Patel RR, Blowes LM, Zandawala M, Delroisse J, Slade SE, Scrivens JH, Egertová M, Elphick MR. Ancient role of vasopressin/oxytocin-type neuropeptides as regulators of feeding revealed in an echinoderm. BMC Biol 2019; 17:60. [PMID: 31362737 PMCID: PMC6668147 DOI: 10.1186/s12915-019-0680-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 07/09/2019] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Vasopressin/oxytocin (VP/OT)-type neuropeptides are well known for their roles as regulators of diuresis, reproductive physiology and social behaviour. However, our knowledge of their functions is largely based on findings from studies on vertebrates and selected protostomian invertebrates. Little is known about the roles of VP/OT-type neuropeptides in deuterostomian invertebrates, which are more closely related to vertebrates than protostomes. RESULTS Here, we have identified and functionally characterised a VP/OT-type signalling system comprising the neuropeptide asterotocin and its cognate G-protein coupled receptor in the starfish (sea star) Asterias rubens, a deuterostomian invertebrate belonging to the phylum Echinodermata. Analysis of the distribution of asterotocin and the asterotocin receptor in A. rubens using mRNA in situ hybridisation and immunohistochemistry revealed expression in the central nervous system (radial nerve cords and circumoral nerve ring), the digestive system (including the cardiac stomach) and the body wall and associated appendages. Informed by the anatomy of asterotocin signalling, in vitro pharmacological experiments revealed that asterotocin acts as a muscle relaxant in starfish, contrasting with the myotropic actions of VP/OT-type neuropeptides in vertebrates. Furthermore, in vivo injection of asterotocin had a striking effect on starfish behaviour-triggering fictive feeding where eversion of the cardiac stomach and changes in body posture resemble the unusual extra-oral feeding behaviour of starfish. CONCLUSIONS We provide a comprehensive characterisation of VP/OT-type signalling in an echinoderm, including a detailed anatomical analysis of the expression of both the VP/OT-type neuropeptide asterotocin and its cognate receptor. Our discovery that asterotocin triggers fictive feeding in starfish provides important new evidence of an evolutionarily ancient role of VP/OT-type neuropeptides as regulators of feeding in animals.
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Affiliation(s)
- Esther A. Odekunle
- School of Biological & Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS UK
| | - Dean C. Semmens
- School of Biological & Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS UK
| | - Nataly Martynyuk
- School of Biological & Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS UK
- Department of Clinical Neurosciences, MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge, CB2 0SZ UK
| | - Ana B. Tinoco
- School of Biological & Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS UK
| | - Abdullah K. Garewal
- School of Biological & Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS UK
| | - Radhika R. Patel
- School of Biological & Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS UK
| | - Liisa M. Blowes
- School of Biological & Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS UK
| | - Meet Zandawala
- School of Biological & Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS UK
- Department of Neuroscience, Brown University, Providence, USA
| | - Jérôme Delroisse
- School of Biological & Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS UK
- Research Institute for Biosciences, Biology of Marine Organisms and Biomimetics, University of Mons (UMONS), 7000 Mons, Belgium
| | - Susan E. Slade
- Waters/Warwick Centre for BioMedical Mass Spectrometry and Proteomics, School of Life Sciences, University of Warwick, Coventry, CV4 7AL UK
- Waters Corporation, Stamford Avenue, Altrincham Road, Wilmslow, SK9 4AX UK
| | - James H. Scrivens
- Waters/Warwick Centre for BioMedical Mass Spectrometry and Proteomics, School of Life Sciences, University of Warwick, Coventry, CV4 7AL UK
- School of Science, Engineering & Design, Teesside University, Stephenson Street, Tees Valley, TS1 3BA UK
| | - Michaela Egertová
- School of Biological & Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS UK
| | - Maurice R. Elphick
- School of Biological & Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS UK
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38
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Helker CSM, Mullapudi ST, Mueller LM, Preussner J, Tunaru S, Skog O, Kwon HB, Kreuder F, Lancman JJ, Bonnavion R, Dong PDS, Looso M, Offermanns S, Korsgren O, Spagnoli FM, Stainier DYR. A whole organism small molecule screen identifies novel regulators of pancreatic endocrine development. Development 2019; 146:dev.172569. [PMID: 31142539 DOI: 10.1242/dev.172569] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 05/08/2019] [Indexed: 12/16/2022]
Abstract
An early step in pancreas development is marked by the expression of the transcription factor Pdx1 within the pancreatic endoderm, where it is required for the specification of all endocrine cell types. Subsequently, Pdx1 expression becomes restricted to the β-cell lineage, where it plays a central role in β-cell function. This pivotal role of Pdx1 at various stages of pancreas development makes it an attractive target to enhance pancreatic β-cell differentiation and increase β-cell function. In this study, we used a newly generated zebrafish reporter to screen over 8000 small molecules for modulators of pdx1 expression. We found four hit compounds and validated their efficacy at different stages of pancreas development. Notably, valproic acid treatment increased pancreatic endoderm formation, while inhibition of TGFβ signaling led to α-cell to β-cell transdifferentiation. HC toxin, another HDAC inhibitor, enhances β-cell function in primary mouse and human islets. Thus, using a whole organism screening strategy, this study identified new pdx1 expression modulators that can be used to influence different steps in pancreas and β-cell development.
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Affiliation(s)
- Christian S M Helker
- Max Planck Institute for Heart and Lung Research, Department of Developmental Genetics, 61231 Bad Nauheim, Germany .,Philipps-University Marburg, Faculty of Biology, Cell Signaling and Dynamics, 35043 Marburg, Germany
| | - Sri-Teja Mullapudi
- Max Planck Institute for Heart and Lung Research, Department of Developmental Genetics, 61231 Bad Nauheim, Germany
| | - Laura M Mueller
- Centre for Stem Cells and Regenerative Medicine, King's College London, London WC2R 2LS, UK
| | - Jens Preussner
- Max Planck Institute for Heart and Lung Research, ECCPS Bioinformatics Core Unit, 61231 Bad Nauheim, Germany
| | - Sorin Tunaru
- Max Planck Institute for Heart and Lung Research, Department of Pharmacology, 61231 Bad Nauheim, Germany.,Biochemistry Institute of the Romanian Academy, Department of Enzymology, Bucharest 060031, Romania
| | - Oskar Skog
- Uppsala University, Department of Immunology, Genetics and Pathology, 751 85 Uppsala, Sweden
| | - Hyouk-Bum Kwon
- Max Planck Institute for Heart and Lung Research, Department of Developmental Genetics, 61231 Bad Nauheim, Germany
| | - Florian Kreuder
- Max Planck Institute for Heart and Lung Research, Department of Developmental Genetics, 61231 Bad Nauheim, Germany
| | - Joseph J Lancman
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA.,Graduate School of Biomedical Sciences, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Remy Bonnavion
- Max Planck Institute for Heart and Lung Research, Department of Pharmacology, 61231 Bad Nauheim, Germany
| | - P Duc Si Dong
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA.,Graduate School of Biomedical Sciences, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Mario Looso
- Max Planck Institute for Heart and Lung Research, ECCPS Bioinformatics Core Unit, 61231 Bad Nauheim, Germany
| | - Stefan Offermanns
- Max Planck Institute for Heart and Lung Research, Department of Pharmacology, 61231 Bad Nauheim, Germany
| | - Ole Korsgren
- Uppsala University, Department of Immunology, Genetics and Pathology, 751 85 Uppsala, Sweden
| | - Francesca M Spagnoli
- Centre for Stem Cells and Regenerative Medicine, King's College London, London WC2R 2LS, UK
| | - Didier Y R Stainier
- Max Planck Institute for Heart and Lung Research, Department of Developmental Genetics, 61231 Bad Nauheim, Germany
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39
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Malli R, Eroglu E, Waldeck-Weiermair M, Graier WF. Filling a GAP-An Optimized Probe for ER Ca(2+) Imaging In Vivo. Cell Chem Biol 2019; 23:641-3. [PMID: 27341431 DOI: 10.1016/j.chembiol.2016.06.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
In this issue of Cell Chemical Biology, Navas-Navarro et al. (2016) demonstrate that fusion of engineered derivatives of the long-known jellyfish proteins green fluorescent protein (GFP) and aequorin yield optimized genetically encoded fluorescent probes for detecting Ca(2+) signals within the endoplasmic reticulum (ER) of living animals.
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Affiliation(s)
- Roland Malli
- Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University of Graz, Harrachgasse 21/III, 8010 Graz, Austria.
| | - Emrah Eroglu
- Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University of Graz, Harrachgasse 21/III, 8010 Graz, Austria
| | - Markus Waldeck-Weiermair
- Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University of Graz, Harrachgasse 21/III, 8010 Graz, Austria
| | - Wolfgang F Graier
- Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University of Graz, Harrachgasse 21/III, 8010 Graz, Austria
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40
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Fernandez-Sanz C, De la Fuente S, Sheu SS. Mitochondrial Ca 2+ concentrations in live cells: quantification methods and discrepancies. FEBS Lett 2019; 593:1528-1541. [PMID: 31058316 DOI: 10.1002/1873-3468.13427] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 04/29/2019] [Accepted: 05/02/2019] [Indexed: 12/11/2022]
Abstract
Intracellular Ca2+ signaling controls numerous cellular functions. Mitochondria respond to cytosolic Ca2+ changes by adapting mitochondrial functions and, in some cell types, shaping the spatiotemporal properties of the cytosolic Ca2+ signal. Numerous methods have been developed to specifically and quantitatively measure the mitochondrial-free Ca2+ concentrations ([Ca2+ ]m ), but there are still significant discrepancies in the calculated absolute values of [Ca2+ ]m in stimulated live cells. These discrepancies may be due to the distinct properties of the methods used to measure [Ca2+ ]m , the calcium-free/bound ratio, and the cell-type and stimulus-dependent Ca2+ dynamics. Critical processes happening in the mitochondria, such as ATP generation, ROS homeostasis, and mitochondrial permeability transition opening, depend directly on the [Ca2+ ]m values. Thus, precise determination of absolute [Ca2+ ]m values is imperative for understanding Ca2+ signaling. This review summarizes the reported calibrated [Ca2+ ]m values in many cell types and discusses the discrepancies among these values. Areas for future research are also proposed.
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Affiliation(s)
- Celia Fernandez-Sanz
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia, PA, USA
| | - Sergio De la Fuente
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia, PA, USA
| | - Shey-Shing Sheu
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia, PA, USA
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41
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Tricoire L, Drobac E, Tsuzuki K, Gallopin T, Picaud S, Cauli B, Rossier J, Lambolez B. Bioluminescence calcium imaging of network dynamics and their cholinergic modulation in slices of cerebral cortex from male rats. J Neurosci Res 2019; 97:414-432. [PMID: 30604494 DOI: 10.1002/jnr.24380] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 11/27/2018] [Accepted: 12/11/2018] [Indexed: 12/12/2022]
Abstract
The activity of neuronal ensembles was monitored in neocortical slices from male rats using wide-field bioluminescence imaging of a calcium sensor formed with the fusion of green fluorescent protein and aequorin (GA) and expressed through viral transfer. GA expression was restricted to pyramidal neurons and did not conspicuously alter neuronal morphology or neocortical cytoarchitecture. Removal of extracellular magnesium or addition of GABA receptor antagonists triggered epileptiform flashes of variable amplitude and spatial extent, indicating that the excitatory and inhibitory networks were functionally preserved in GA-expressing slices. We found that agonists of muscarinic acetylcholine receptors largely increased the peak bioluminescence response to local electrical stimulation in layer I or white matter, and gave rise to a slowly decaying response persisting for tens of seconds. The peak increase involved layers II/III and V and did not result in marked alteration of response spatial properties. The persistent response involved essentially layer V and followed the time course of the muscarinic afterdischarge depolarizing plateau in layer V pyramidal cells. This plateau potential triggered spike firing in layer V, but not layer II/III pyramidal cells, and was accompanied by recurrent synaptic excitation in layer V. Our results indicate that wide-field imaging of GA bioluminescence is well suited to monitor local and global network activity patterns, involving different mechanisms of intracellular calcium increase, and occurring on various timescales.
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Affiliation(s)
- Ludovic Tricoire
- Neuroscience Paris Seine - Institut de Biologie Paris Seine (NPS - IBPS), INSERM, CNRS, Sorbonne Universités, Paris, France
| | - Estelle Drobac
- Neuroscience Paris Seine - Institut de Biologie Paris Seine (NPS - IBPS), INSERM, CNRS, Sorbonne Universités, Paris, France
| | - Keisuke Tsuzuki
- Neuroscience Paris Seine - Institut de Biologie Paris Seine (NPS - IBPS), INSERM, CNRS, Sorbonne Universités, Paris, France
| | - Thierry Gallopin
- Neuroscience Paris Seine - Institut de Biologie Paris Seine (NPS - IBPS), INSERM, CNRS, Sorbonne Universités, Paris, France
| | - Sandrine Picaud
- Neuroscience Paris Seine - Institut de Biologie Paris Seine (NPS - IBPS), INSERM, CNRS, Sorbonne Universités, Paris, France
| | - Bruno Cauli
- Neuroscience Paris Seine - Institut de Biologie Paris Seine (NPS - IBPS), INSERM, CNRS, Sorbonne Universités, Paris, France
| | - Jean Rossier
- Neuroscience Paris Seine - Institut de Biologie Paris Seine (NPS - IBPS), INSERM, CNRS, Sorbonne Universités, Paris, France
| | - Bertrand Lambolez
- Neuroscience Paris Seine - Institut de Biologie Paris Seine (NPS - IBPS), INSERM, CNRS, Sorbonne Universités, Paris, France
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42
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Choi JR, Kim SM, Ryu RH, Kim SP, Sohn JW. Implantable Neural Probes for Brain-Machine Interfaces - Current Developments and Future Prospects. Exp Neurobiol 2018; 27:453-471. [PMID: 30636899 PMCID: PMC6318554 DOI: 10.5607/en.2018.27.6.453] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 11/15/2018] [Accepted: 11/15/2018] [Indexed: 12/14/2022] Open
Abstract
A Brain-Machine interface (BMI) allows for direct communication between the brain and machines. Neural probes for recording neural signals are among the essential components of a BMI system. In this report, we review research regarding implantable neural probes and their applications to BMIs. We first discuss conventional neural probes such as the tetrode, Utah array, Michigan probe, and electroencephalography (ECoG), following which we cover advancements in next-generation neural probes. These next-generation probes are associated with improvements in electrical properties, mechanical durability, biocompatibility, and offer a high degree of freedom in practical settings. Specifically, we focus on three key topics: (1) novel implantable neural probes that decrease the level of invasiveness without sacrificing performance, (2) multi-modal neural probes that measure both electrical and optical signals, (3) and neural probes developed using advanced materials. Because safety and precision are critical for practical applications of BMI systems, future studies should aim to enhance these properties when developing next-generation neural probes.
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Affiliation(s)
- Jong-Ryul Choi
- Medical Device Development Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu 41061, Korea
| | - Seong-Min Kim
- Department of Medical Science, College of Medicine, Catholic Kwandong University, Gangneung 25601, Korea.,Biomedical Research Institute, Catholic Kwandong University International St. Mary's Hospital, Incheon 21711, Korea
| | - Rae-Hyung Ryu
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu 41061, Korea
| | - Sung-Phil Kim
- Department of Human Factors Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
| | - Jeong-Woo Sohn
- Department of Medical Science, College of Medicine, Catholic Kwandong University, Gangneung 25601, Korea.,Biomedical Research Institute, Catholic Kwandong University International St. Mary's Hospital, Incheon 21711, Korea
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43
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Gao M, Liu YJ. Photoluminescence Rainbow from Coelenteramide-A Theoretical Study. Photochem Photobiol 2018; 95:563-571. [PMID: 30059157 DOI: 10.1111/php.12987] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 07/24/2018] [Indexed: 12/17/2022]
Abstract
A wide variety of marine bioluminescent organisms emit light via the excited-state coelenteramide, which is produced from the coelenterazine oxidation via a series of complicated chemical reactions in protein. Photoluminescence of coelenteramide is a simple way to produce light without experiencing the intricate reactions starting from coelenterazine. To extend the color range of light emission, many coelenterazine analogues were synthesized, but mostly only produce blue and cyan fluorescence. Based on the 42 synthesized coelenterazine analogues, we theoretically studied the absorption and fluorescence properties of the corresponding coelenteramide analogues. The electronic effect, steric effect, conjugated effect and solvated effect were considered. The results indicated that conjugated effect has great influence on the strength and wavelength of fluorescence and large electron transfer is beneficial to redshift. Based on the regularities, we theoretically designed six coelenteramide analogues, and together with the original coelenteramide, the seven-ones emit the seven colors of rainbow via their photoluminescences. This study expands the coelenteramide fluorescence to the whole visible light region and could inspire new application.
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Affiliation(s)
- Meng Gao
- Key Laboratory of Theoretical and Computational Photochemistry College of Chemistry, Ministry of Education, Beijing Normal University, Beijing, 100875, China
| | - Ya-Jun Liu
- Key Laboratory of Theoretical and Computational Photochemistry College of Chemistry, Ministry of Education, Beijing Normal University, Beijing, 100875, China
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Hossain MN, Suzuki K, Iwano M, Matsuda T, Nagai T. Bioluminescent Low-Affinity Ca 2+ Indicator for ER with Multicolor Calcium Imaging in Single Living Cells. ACS Chem Biol 2018; 13:1862-1871. [PMID: 29494125 DOI: 10.1021/acschembio.7b01014] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The sarco/endoplasmic reticulum (SR/ER) is the foremost intercellular Ca2+ store (at submillimolar concentrations), playing a crucial role in controlling intracellular Ca2+ levels. For the investigation of SR/ER Ca2+ dynamics in cells, fluorescent protein-based genetically encoded calcium indicators (GECIs) with low Ca2+ affinity have been used. Recently, bioluminescent protein-based GECIs with high brightness have been reported to counter the constraints of fluorescence imaging, such as phototoxicity. However, their Ca2+ affinity is high and limited for imaging in the cytosol, nucleus, or mitochondria. In this study, we developed a novel cyan color, low-affinity ( Kd = 110 μM) intensiometric bioluminescent GECI, which enables monitoring of the Ca2+ dynamics in the ER of HeLa cells and the SR of C2C12-derived myotubes. To facilitate the broad concentration range of Ca2+ in cellular organelles, we additionally developed an intermediate affinity ( Kd = 18 μM), orange color, and bioluminescent GECI, which enables monitoring of Ca2+ dynamics in the mitochondria of HeLa cells. With these indicators, in conjunction with an existing high-affinity, green, bioluminescent GECI, we succeeded in multicolor bioluminescent Ca2+ imaging in three distinct organelles (nuclei, mitochondria, and ER) simultaneously. The multicolor, live, bioluminescent Ca2+ imaging demonstrated here can be used to stably reveal the ER Ca2+ homeostasis and cooperative Ca2+ regulation among organelles. This will lead to the further understanding of Ca2+-related physiological functions and pathophysiological mechanisms.
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Affiliation(s)
- Md Nadim Hossain
- Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Japan
| | - Kazushi Suzuki
- Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Japan
| | - Megumi Iwano
- Department of Biomolecular Science and Engineering, The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki 567-0047, Japan
| | - Tomoki Matsuda
- Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Japan
- Department of Biomolecular Science and Engineering, The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki 567-0047, Japan
| | - Takeharu Nagai
- Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Japan
- Department of Biomolecular Science and Engineering, The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki 567-0047, Japan
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45
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Aulestia FJ, Néant I, Dong J, Haiech J, Kilhoffer MC, Moreau M, Leclerc C. Quiescence status of glioblastoma stem-like cells involves remodelling of Ca 2+ signalling and mitochondrial shape. Sci Rep 2018; 8:9731. [PMID: 29950651 PMCID: PMC6021377 DOI: 10.1038/s41598-018-28157-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 06/14/2018] [Indexed: 12/31/2022] Open
Abstract
Quiescence is a reversible cell-cycle arrest which allows cancer stem-like cells to evade killing following therapies. Here, we show that proliferating glioblastoma stem-like cells (GSLCs) can be induced and maintained in a quiescent state by lowering the extracellular pH. Through RNAseq analysis we identified Ca2+ signalling genes differentially expressed between proliferating and quiescent GSLCs. Using the bioluminescent Ca2+ reporter EGFP-aequorin we observed that the changes in Ca2+ homeostasis occurring during the switch from proliferation to quiescence are controlled through store-operated channels (SOC) since inhibition of SOC drives proliferating GSLCs to quiescence. We showed that this switch is characterized by an increased capacity of GSLCs’ mitochondria to capture Ca2+ and by a dramatic and reversible change of mitochondrial morphology from a tubular to a donut shape. Our data suggest that the remodelling of the Ca2+ homeostasis and the reshaping of mitochondria might favours quiescent GSLCs’ survival and their aggressiveness in glioblastoma.
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Affiliation(s)
- Francisco J Aulestia
- Centre de Biologie du Développement (CBD), Centre de Biologie Intégrative (CBI), Université de Toulouse, CNRS, UPS, F-31062, Toulouse, France
| | - Isabelle Néant
- Centre de Biologie du Développement (CBD), Centre de Biologie Intégrative (CBI), Université de Toulouse, CNRS, UPS, F-31062, Toulouse, France
| | - Jihu Dong
- Laboratoire d'Excellence Medalis, Université de Strasbourg, CNRS, LIT UMR 7200, F-67000, Strasbourg, France
| | - Jacques Haiech
- Laboratoire d'Excellence Medalis, Université de Strasbourg, CNRS, LIT UMR 7200, F-67000, Strasbourg, France
| | - Marie-Claude Kilhoffer
- Laboratoire d'Excellence Medalis, Université de Strasbourg, CNRS, LIT UMR 7200, F-67000, Strasbourg, France
| | - Marc Moreau
- Centre de Biologie du Développement (CBD), Centre de Biologie Intégrative (CBI), Université de Toulouse, CNRS, UPS, F-31062, Toulouse, France
| | - Catherine Leclerc
- Centre de Biologie du Développement (CBD), Centre de Biologie Intégrative (CBI), Université de Toulouse, CNRS, UPS, F-31062, Toulouse, France.
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Eremeeva EV, Vysotski ES. Exploring Bioluminescence Function of the Ca2+
-regulated Photoproteins with Site-directed Mutagenesis. Photochem Photobiol 2018; 95:8-23. [DOI: 10.1111/php.12945] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Accepted: 05/25/2018] [Indexed: 11/29/2022]
Affiliation(s)
- Elena V. Eremeeva
- Photobiology Laboratory; Institute of Biophysics SB RAS; Federal Research Center “Krasnoyarsk Science Center SB RAS”; Krasnoyarsk Russia
| | - Eugene S. Vysotski
- Photobiology Laboratory; Institute of Biophysics SB RAS; Federal Research Center “Krasnoyarsk Science Center SB RAS”; Krasnoyarsk Russia
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47
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Bioluminescence and kinetic aspects of double mutated aequorin variants. Int J Biol Macromol 2018; 112:163-168. [DOI: 10.1016/j.ijbiomac.2018.01.170] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 01/24/2018] [Accepted: 01/25/2018] [Indexed: 11/21/2022]
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48
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Costa A, Navazio L, Szabo I. The contribution of organelles to plant intracellular Calcium signalling. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:4996169. [PMID: 29767757 DOI: 10.1093/jxb/ery185] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Indexed: 05/18/2023]
Abstract
Calcium (Ca2+) is among the most important intracellular messengers in living organisms. Understanding of the players and dynamics of Ca2+ signalling pathways in plants may help to unravel the molecular basis of their exceptional flexibility to respond and to adapt to different stimuli. In the present review we focus on new tools that have recently revolutionized our view of organellar Ca2+ signalling as well as on the current knowledge regarding the pathways mediating Ca2+ fluxes across intracellular membranes. The contribution of organelles and cellular subcompartments to the orchestrated response via Ca2+ signalling within a cell is also discussed, underlining the fact that one of the greatest challenges in the field is the elucidation of how influx and efflux Ca2+ transporters/channels are regulated in a concerted manner to translate specific information into a Ca2+ signature.
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Affiliation(s)
- Alex Costa
- Department of Biosciences, University of Milan, Via G. Celoria, Milan, Italy
- Institute of Biophysics, Consiglio Nazionale delle Ricerche, Via G. Celoria, Milan, Italy
| | - Lorella Navazio
- Department of Biology, University of Padova, Via U. Bassi, Padova, Italy
- Botanical Garden, University of Padova, Via Orto Botanico, Padova, Italy
| | - Ildiko Szabo
- Department of Biology, University of Padova, Via U. Bassi, Padova, Italy
- Botanical Garden, University of Padova, Via Orto Botanico, Padova, Italy
- Institute of Neurosciences, Consiglio Nazionale delle Ricerche, Via U. Bassi, Padova, Italy
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Discovery and functional characterisation of a luqin-type neuropeptide signalling system in a deuterostome. Sci Rep 2018; 8:7220. [PMID: 29740074 PMCID: PMC5940834 DOI: 10.1038/s41598-018-25606-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 04/24/2018] [Indexed: 12/25/2022] Open
Abstract
Neuropeptides are diverse and evolutionarily ancient regulators of physiological/behavioural processes in animals. Here we have investigated the evolution and comparative physiology of luqin-type neuropeptide signalling, which has been characterised previously in protostomian invertebrates. Phylogenetic analysis indicates that luqin-type receptors and tachykinin-type receptors are paralogous and probably originated in a common ancestor of the Bilateria. In the deuterostomian lineage, luqin-type signalling has been lost in chordates but interestingly it has been retained in ambulacrarians. Therefore, here we characterised luqin-type signalling for the first time in an ambulacrarian – the starfish Asterias rubens (phylum Echinodermata). A luqin-like neuropeptide with a C-terminal RWamide motif (ArLQ; EEKTRFPKFMRW-NH2) was identified as the ligand for two luqin-type receptors in A. rubens, ArLQR1 and ArLQR2. Furthermore, analysis of the expression of the ArLQ precursor using mRNA in situ hybridisation revealed expression in the nervous system, digestive system and locomotory organs (tube feet) and in vitro pharmacology revealed that ArLQ causes dose-dependent relaxation of tube feet. Accordingly, previous studies have revealed that luqin-type signalling regulates feeding and locomotor activity in protostomes. In conclusion, our phylogenetic analysis combined with characterisation of luqin-type signalling in a deuterostome has provided new insights into neuropeptide evolution and function in the animal kingdom.
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Schmidt A, Bauknecht P, Williams EA, Augustinowski K, Gründer S, Jékely G. Dual signaling of Wamide myoinhibitory peptides through a peptide‐gated channel and a GPCR in
Platynereis. FASEB J 2018; 32:5338-5349. [DOI: 10.1096/fj.201800274r] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Axel Schmidt
- Institute of Physiology, Rheinisch‐Westfälische Technische Hochschule (RWTH) Aachen UniversityAachenGermany
| | | | | | - Katrin Augustinowski
- Institute of Physiology, Rheinisch‐Westfälische Technische Hochschule (RWTH) Aachen UniversityAachenGermany
| | - Stefan Gründer
- Institute of Physiology, Rheinisch‐Westfälische Technische Hochschule (RWTH) Aachen UniversityAachenGermany
| | - Gáspár Jékely
- Living Systems Institute, University of ExeterExeterUnited Kingdom
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