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Kouba S, Buscaglia P, Guéguinou M, Ibrahim S, Félix R, Guibon R, Fromont G, Pigat N, Capiod T, Vandier C, Mignen O, Potier-Cartereau M. Pivotal role of the ORAI3-STIM2 complex in the control of mitotic death and prostate cancer cell cycle progression. Cell Calcium 2023; 115:102794. [PMID: 37597301 DOI: 10.1016/j.ceca.2023.102794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/27/2023] [Accepted: 08/12/2023] [Indexed: 08/21/2023]
Abstract
Prostate cancer (PCa) represents one of the most frequent diagnosed cancer in males worldwide. Due to routine screening tests and the efficiency of available treatments, PCa-related deaths have significantly decreased over the past decades. However, PCa remains a critical threat if detected at a late stage in which, cancer cells would have already detached from the primary tumor to spread and invade other parts of the body. Calcium (Ca2+) channels and their protein regulators are now considered as hallmarks of cancer and some of them have been well examined in PCa. Among these Ca2+ channels, isoform 3 of the ORAI channel family has been shown to regulate the proliferation of PCa cells via the Arachidonic Acid-mediated Ca2+ entry, requiring the involvement of STIM1 (Stromal Interaction Molecule 1). Still, no study has yet demonstrated a role of the "neglected" STIM2 isoform in PCa or if it may interact with ORAI3 to promote an oncogenic behavior. In this study, we demonstrate that ORAI3 and STIM2 are upregulated in human PCa tissues. In old KIMAP (Knock-In Mouse Prostate Adenocarcinoma) mice, ORAI3 and STIM2 mRNA levels were significantly higher than ORAI1 and STIM1. In vitro, we show that ORAI3-STIM2 interact under basal conditions in PC-3 cells. ORAI3 silencing increased Store Operated Ca2+ Entry (SOCE) and induced a significant increase of the cell population in G2/M phase of the cell cycle, consistent with the role of ORAI3 as a negative regulator of SOCE. Higher expression levels of CDK1-Y15/Cyclin B1 were detected and mitotic arrest-related death occurred after ORAI3 silencing, which resulted in activating Bax/Bcl-2-mediated apoptotic pathway and caspase-8 activation and cleavage. STIM2 and ORAI3 expression increased in M phase while STIM1 expression and SOCE amplitude significantly decreased. Taken together, ORAI3 -STIM2 complex allows a successful progression through mitosis of PCa cells by evading mitotic catastrophe.
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Affiliation(s)
- Sana Kouba
- INSERM U1069, N2C: Nutrition, Croissance et Cancer, University of Tours, Tours, France
| | - Paul Buscaglia
- INSERM U1227, LBAI: Lymphocytes B, Autoimmunité et Immunotherapies, University of Bretagne Occidentale, Brest, France
| | - Maxime Guéguinou
- INSERM U1069, N2C: Nutrition, Croissance et Cancer, University of Tours, Tours, France
| | - Sajida Ibrahim
- EA 7501, University of Tours - ERL 7001 LNOx - CNRS, GICC: Groupe Innovation et Ciblage Cellulaire, Tours, France
| | - Romain Félix
- INSERM U1227, LBAI: Lymphocytes B, Autoimmunité et Immunotherapies, University of Bretagne Occidentale, Brest, France
| | - Roseline Guibon
- INSERM U1069, N2C: Nutrition, Croissance et Cancer, University of Tours, Tours, France; Service d'Anatomie et cytologie pathologiques, Bretonneau, Centre Hospitalier Régional et Universitaire, Tours, France
| | - Gaëlle Fromont
- INSERM U1069, N2C: Nutrition, Croissance et Cancer, University of Tours, Tours, France; Service d'Anatomie et cytologie pathologiques, Bretonneau, Centre Hospitalier Régional et Universitaire, Tours, France
| | - Natascha Pigat
- INSERM U1151, Institut Necker Enfants Malades, Universiy of Paris, 160 rue de Vaugirard, Paris 75015 France
| | - Thierry Capiod
- INSERM U1151, Institut Necker Enfants Malades, Universiy of Paris, 160 rue de Vaugirard, Paris 75015 France
| | - Christophe Vandier
- INSERM U1069, N2C: Nutrition, Croissance et Cancer, University of Tours, Tours, France
| | - Olivier Mignen
- INSERM U1227, LBAI: Lymphocytes B, Autoimmunité et Immunotherapies, University of Bretagne Occidentale, Brest, France.
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2
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Yin TC, Van Vranken JG, Srivastava D, Mittal A, Buscaglia P, Moore AE, Verdinez JA, Graham AE, Walsh SA, Acevedo MA, Kerns RJ, Artemyev NO, Gygi SP, Sebag JA. Insulin sensitization by small molecules enhancing GLUT4 translocation. Cell Chem Biol 2023; 30:933-942.e6. [PMID: 37453421 DOI: 10.1016/j.chembiol.2023.06.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 03/06/2023] [Accepted: 06/14/2023] [Indexed: 07/18/2023]
Abstract
Insulin resistance (IR) is the root cause of type II diabetes, yet no safe treatment is available to address it. Using a high throughput compatible assay that measures real-time translocation of the glucose transporter glucose transporter 4 (GLUT4), we identified small molecules that potentiate insulin action. In vivo, these insulin sensitizers improve insulin-stimulated GLUT4 translocation, glucose tolerance, and glucose uptake in a model of IR. Using proteomic and CRISPR-based approaches, we identified the targets of those compounds as Unc119 proteins and solved the structure of Unc119 bound to the insulin sensitizer. This study identifies compounds that have the potential to be developed into diabetes treatment and establishes Unc119 proteins as targets for improving insulin sensitivity.
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Affiliation(s)
- Terry C Yin
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA 52242, USA; Fraternal Order of Eagle Diabetes Research Center, University of Iowa, Iowa City, IA 52242, USA; Pappajohn Biomedical Institute, University of Iowa, Iowa City, IA 52242, USA
| | | | - Dhiraj Srivastava
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA 52242, USA
| | - Ayushi Mittal
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA 52242, USA; Fraternal Order of Eagle Diabetes Research Center, University of Iowa, Iowa City, IA 52242, USA; Pappajohn Biomedical Institute, University of Iowa, Iowa City, IA 52242, USA
| | - Paul Buscaglia
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA 52242, USA; Fraternal Order of Eagle Diabetes Research Center, University of Iowa, Iowa City, IA 52242, USA; Pappajohn Biomedical Institute, University of Iowa, Iowa City, IA 52242, USA
| | - Autumn E Moore
- Fraternal Order of Eagle Diabetes Research Center, University of Iowa, Iowa City, IA 52242, USA; College of Pharmacy, University of Iowa, Iowa City, IA 52242, USA
| | - Jissele A Verdinez
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA 52242, USA; Fraternal Order of Eagle Diabetes Research Center, University of Iowa, Iowa City, IA 52242, USA; Pappajohn Biomedical Institute, University of Iowa, Iowa City, IA 52242, USA
| | - Aschleigh E Graham
- Fraternal Order of Eagle Diabetes Research Center, University of Iowa, Iowa City, IA 52242, USA; College of Pharmacy, University of Iowa, Iowa City, IA 52242, USA
| | - Susan A Walsh
- Small Animal Imaging Core, University of Iowa, Iowa City, IA 52242, USA
| | - Michael A Acevedo
- Small Animal Imaging Core, University of Iowa, Iowa City, IA 52242, USA
| | - Robert J Kerns
- Fraternal Order of Eagle Diabetes Research Center, University of Iowa, Iowa City, IA 52242, USA; College of Pharmacy, University of Iowa, Iowa City, IA 52242, USA
| | - Nikolai O Artemyev
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA 52242, USA
| | - Steven P Gygi
- Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA
| | - Julien A Sebag
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA 52242, USA; Fraternal Order of Eagle Diabetes Research Center, University of Iowa, Iowa City, IA 52242, USA; Pappajohn Biomedical Institute, University of Iowa, Iowa City, IA 52242, USA.
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3
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Yin TC, Mittal A, Buscaglia P, Li W, Sebag JA. Activation of amygdala prokineticin receptor 2 neurons drives the anorexigenic activity of the neuropeptide PK2. J Biol Chem 2022; 299:102814. [PMID: 36539034 PMCID: PMC9860486 DOI: 10.1016/j.jbc.2022.102814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 12/09/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
Energy homeostasis is a complex system involving multiple hormones, neuropeptides, and receptors. Prokineticins (PK1 and PK2) are agonists to two G protein-coupled receptors, prokineticin receptor 1 and 2 (PKR1 and PKR2), which decrease food intake when injected in rodents. The relative contribution of PKR1 and PKR2 to the anorexigenic effect of PK2 and their site of action in the brain have not yet been elucidated. While PKR1 and PKR2 are both expressed in the hypothalamus, a central region involved in the control of energy homeostasis, PKR2 is also present in the amygdala, which has recently been shown to regulate food intake in response to several anorexigenic signals. PKR trafficking and signaling are inhibited by the melanocortin receptor accessory protein 2 (MRAP2), thus suggesting that MRAP2 has the potential to alter the anorexigenic activity of PK2 in vivo. In this study, we investigated the importance of PKR1 and PKR2 for PK2-mediated inhibition of food intake, the brain region involved in this function, and the effect of MRAP2 on PK2 action in vivo. Using targeted silencing of PKR2 and chemogenetic manipulation of PKR2 neurons, we show that the anorexigenic effect of PK2 is mediated by PKR2 in the amygdala and that altering MRAP2 expression in PKR2 neurons modulates the activity of PK2. Collectively, our results provide evidence that inhibition of food intake by PKs is not mediated through activation of hypothalamic neurons but rather amygdala PKR2 neurons and further establishes the importance of MRAP2 in the regulation of energy homeostasis.
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Affiliation(s)
- Terry C. Yin
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, Iowa, USA,Fraternal Order of Eagle Diabetes Research Center, University of Iowa, Iowa City, Iowa, USA,Iowa Neuroscience Institute, University of Iowa, Iowa City, Iowa, USA,Pappajohn Biomedical Institute, University of Iowa, Iowa City, Iowa, USA
| | - Ayushi Mittal
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, Iowa, USA,Fraternal Order of Eagle Diabetes Research Center, University of Iowa, Iowa City, Iowa, USA,Iowa Neuroscience Institute, University of Iowa, Iowa City, Iowa, USA,Pappajohn Biomedical Institute, University of Iowa, Iowa City, Iowa, USA
| | - Paul Buscaglia
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, Iowa, USA,Fraternal Order of Eagle Diabetes Research Center, University of Iowa, Iowa City, Iowa, USA,Iowa Neuroscience Institute, University of Iowa, Iowa City, Iowa, USA,Pappajohn Biomedical Institute, University of Iowa, Iowa City, Iowa, USA
| | - Wenxian Li
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, Iowa, USA,Fraternal Order of Eagle Diabetes Research Center, University of Iowa, Iowa City, Iowa, USA,Iowa Neuroscience Institute, University of Iowa, Iowa City, Iowa, USA,Pappajohn Biomedical Institute, University of Iowa, Iowa City, Iowa, USA
| | - Julien A. Sebag
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, Iowa, USA,Fraternal Order of Eagle Diabetes Research Center, University of Iowa, Iowa City, Iowa, USA,Iowa Neuroscience Institute, University of Iowa, Iowa City, Iowa, USA,Pappajohn Biomedical Institute, University of Iowa, Iowa City, Iowa, USA,For correspondence: Julien A. Sebag
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Rouault AAJ, Buscaglia P, Sebag JA. MRAP2 inhibits β-arrestin recruitment to the ghrelin receptor by preventing GHSR1a phosphorylation. J Biol Chem 2022; 298:102057. [PMID: 35605660 PMCID: PMC9190059 DOI: 10.1016/j.jbc.2022.102057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 05/17/2022] [Accepted: 05/18/2022] [Indexed: 11/19/2022] Open
Abstract
The melanocortin receptor accessory protein 2 (MRAP2) is essential for several physiological functions of the ghrelin receptor growth hormone secretagogue receptor 1a (GHSR1a), including increasing appetite and suppressing insulin secretion. In the absence of MRAP2, GHSR1a displays high constitutive activity and a weak G-protein-mediated response to ghrelin and readily recruits β-arrestin. In the presence of MRAP2, however, G-protein-mediated signaling via GHSR1a is strongly dependent on ghrelin stimulation and the recruitment of β-arrestin is significantly diminished. To better understand how MRAP2 modifies GHSR1a signaling, here we investigated the role of several phosphorylation sites within the C-terminal tail and third intracellular loop of GHSR1a, as well as the mechanism behind MRAP2-mediated inhibition of β-arrestin recruitment. We show that Ser252 and Thr261 in the third intracellular loop of GHSR1a contribute to β-arrestin recruitment, whereas the C-terminal region is not essential for β-arrestin interaction. Additionally, we found that MRAP2 inhibits GHSR1a phosphorylation by blocking the interaction of GRK2 and PKC with the receptor. Taken together, these data suggest that MRAP2 alters GHSR1a signaling by directly impacting the phosphorylation state of the receptor and that the C-terminal tail of GHSR1a prevents rather than contribute to β-arrestin recruitment.
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Affiliation(s)
- Alix A J Rouault
- Department of Molecular Physiology and Biophysics, University of Iowa, Carver College of Medicine, Iowa City, Iowa, USA; F.O.E.D.R.C, Iowa City, Iowa, USA; Pappajohn Biomedical Institute, Iowa City, Iowa, USA; Iowa Neuroscience Institute, Iowa City, Iowa, USA
| | - Paul Buscaglia
- Department of Molecular Physiology and Biophysics, University of Iowa, Carver College of Medicine, Iowa City, Iowa, USA; F.O.E.D.R.C, Iowa City, Iowa, USA; Pappajohn Biomedical Institute, Iowa City, Iowa, USA; Iowa Neuroscience Institute, Iowa City, Iowa, USA
| | - Julien A Sebag
- Department of Molecular Physiology and Biophysics, University of Iowa, Carver College of Medicine, Iowa City, Iowa, USA; F.O.E.D.R.C, Iowa City, Iowa, USA; Pappajohn Biomedical Institute, Iowa City, Iowa, USA; Iowa Neuroscience Institute, Iowa City, Iowa, USA.
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5
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Pierre O, Fouchard M, Le Goux N, Buscaglia P, Leschiera R, Lewis RJ, Mignen O, Fluhr JW, Misery L, Le Garrec R. Pacific-Ciguatoxin-2 and Brevetoxin-1 Induce the Sensitization of Sensory Receptors Mediating Pain and Pruritus in Sensory Neurons. Mar Drugs 2021; 19:387. [PMID: 34356812 PMCID: PMC8306505 DOI: 10.3390/md19070387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 06/25/2021] [Accepted: 06/26/2021] [Indexed: 11/24/2022] Open
Abstract
Ciguatera fish poisoning (CFP) and neurotoxic shellfish poisoning syndromes are induced by the consumption of seafood contaminated by ciguatoxins and brevetoxins. Both toxins cause sensory symptoms such as paresthesia, cold dysesthesia and painful disorders. An intense pruritus, which may become chronic, occurs also in CFP. No curative treatment is available and the pathophysiology is not fully elucidated. Here we conducted single-cell calcium video-imaging experiments in sensory neurons from newborn rats to study in vitro the ability of Pacific-ciguatoxin-2 (P-CTX-2) and brevetoxin-1 (PbTx-1) to sensitize receptors and ion channels, (i.e., to increase the percentage of responding cells and/or the response amplitude to their pharmacological agonists). In addition, we studied the neurotrophin release in sensory neurons co-cultured with keratinocytes after exposure to P-CTX-2. Our results show that P-CTX-2 induced the sensitization of TRPA1, TRPV4, PAR2, MrgprC, MrgprA and TTX-r NaV channels in sensory neurons. P-CTX-2 increased the release of nerve growth factor and brain-derived neurotrophic factor in the co-culture supernatant, suggesting that those neurotrophins could contribute to the sensitization of the aforementioned receptors and channels. Our results suggest the potential role of sensitization of sensory receptors/ion channels in the induction or persistence of sensory disturbances in CFP syndrome.
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Affiliation(s)
- Ophélie Pierre
- Laboratoire Interactions Epithéliums-Neurones (LIEN), University of Brest, EA4685, F-29200 Brest, France; (M.F.); (R.L.); (J.W.F.); (L.M.); (R.L.G.)
| | - Maxime Fouchard
- Laboratoire Interactions Epithéliums-Neurones (LIEN), University of Brest, EA4685, F-29200 Brest, France; (M.F.); (R.L.); (J.W.F.); (L.M.); (R.L.G.)
- Department of Dermatology, University Hospital of Brest, F-29200 Brest, France
| | - Nelig Le Goux
- Lymphocytes B et Autoimmunité, Faculty of Medicine and Health Sciences, University of Brest, Inserm, UMR1227, F-29200 Brest, France; (N.L.G.); (P.B.); (O.M.)
| | - Paul Buscaglia
- Lymphocytes B et Autoimmunité, Faculty of Medicine and Health Sciences, University of Brest, Inserm, UMR1227, F-29200 Brest, France; (N.L.G.); (P.B.); (O.M.)
- Department of Molecular Physiology and Biophysics, Fraternal Order of Eagle Diabetes Research Center, Iowa Neuroscience Institute, Pappajohn Biomedical Institute, University of Iowa, Iowa City, IA 52242, USA
| | - Raphaël Leschiera
- Laboratoire Interactions Epithéliums-Neurones (LIEN), University of Brest, EA4685, F-29200 Brest, France; (M.F.); (R.L.); (J.W.F.); (L.M.); (R.L.G.)
| | - Richard J. Lewis
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4072, Australia;
| | - Olivier Mignen
- Lymphocytes B et Autoimmunité, Faculty of Medicine and Health Sciences, University of Brest, Inserm, UMR1227, F-29200 Brest, France; (N.L.G.); (P.B.); (O.M.)
| | - Joachim W. Fluhr
- Laboratoire Interactions Epithéliums-Neurones (LIEN), University of Brest, EA4685, F-29200 Brest, France; (M.F.); (R.L.); (J.W.F.); (L.M.); (R.L.G.)
- Department of Dermatology, University Hospital of Brest, F-29200 Brest, France
- Department of Dermatology and Allergology, Universitaetsmedizin Charité Berlin, D-10117 Berlin, Germany
| | - Laurent Misery
- Laboratoire Interactions Epithéliums-Neurones (LIEN), University of Brest, EA4685, F-29200 Brest, France; (M.F.); (R.L.); (J.W.F.); (L.M.); (R.L.G.)
- Department of Dermatology, University Hospital of Brest, F-29200 Brest, France
| | - Raphaële Le Garrec
- Laboratoire Interactions Epithéliums-Neurones (LIEN), University of Brest, EA4685, F-29200 Brest, France; (M.F.); (R.L.); (J.W.F.); (L.M.); (R.L.G.)
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6
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Burgos M, Philippe R, Antigny F, Buscaglia P, Masson E, Mukherjee S, Dubar P, Le Maréchal C, Campeotto F, Lebonvallet N, Frieden M, Llopis J, Domingo B, Stathopulos PB, Ikura M, Brooks W, Guida W, Chen JM, Ferec C, Capiod T, Mignen O. The p.E152K-STIM1 mutation deregulates Ca 2+ signaling contributing to chronic pancreatitis. J Cell Sci 2021; 134:jcs.244012. [PMID: 33468626 DOI: 10.1242/jcs.244012] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 12/24/2020] [Indexed: 11/20/2022] Open
Abstract
Since deregulation of intracellular Ca2+ can lead to intracellular trypsin activation, and stromal interaction molecule-1 (STIM1) protein is the main regulator of Ca2+ homeostasis in pancreatic acinar cells, we explored the Ca2+ signaling in 37 STIM1 variants found in three pancreatitis patient cohorts. Extensive functional analysis of one particular variant, p.E152K, identified in three patients, provided a plausible link between dysregulated Ca2+ signaling within pancreatic acinar cells and chronic pancreatitis susceptibility. Specifically, p.E152K, located within the STIM1 EF-hand and sterile α-motif domain, increased the release of Ca2+ from the endoplasmic reticulum in patient-derived fibroblasts and transfected HEK293T cells. This event was mediated by altered STIM1-sarco/endoplasmic reticulum calcium transport ATPase (SERCA) conformational change and enhanced SERCA pump activity leading to increased store-operated Ca2+ entry (SOCE). In pancreatic AR42J cells expressing the p.E152K variant, Ca2+ signaling perturbations correlated with defects in trypsin activation and secretion, and increased cytotoxicity after cholecystokinin stimulation.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Miguel Burgos
- Université de Brest, INSERM, EFS, UMR 1078, GGB, F-29200 Brest, France .,Centro Regional de Investigaciones Biomédicas (CRIB) and Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, 02002 Albacete, Spain.,Complejo Hospitalario Universitario de Albacete (UI-CHUA), 02002 Albacete, Spain
| | - Reginald Philippe
- Université de Brest, INSERM, EFS, UMR 1078, GGB, F-29200 Brest, France
| | - Fabrice Antigny
- Univ. Paris-Sud, Faculté de Médecine, Université Paris-Saclay, 94270 Le Kremlin Bicêtre, France.,Inserm UMR_S 999, Hôpital Marie Lannelongue, 92350 Le Plessis Robinson, France.,Department of Cell Physiology and Metabolism, Geneva Medical Center, CH-1211 Geneva, Switzerland
| | - Paul Buscaglia
- Université de Brest, INSERM, EFS, UMR 1078, GGB, F-29200 Brest, France.,UMR1227, Lymphocytes B et Autoimmunité, Université de Brest, INSERM, CHU de Brest, BP824, F29609 Brest, France
| | - Emmanuelle Masson
- Université de Brest, INSERM, EFS, UMR 1078, GGB, F-29200 Brest, France
| | - Sreya Mukherjee
- Department of Chemistry, University of South Florida, Tampa, FL 33620, USA
| | - Pauline Dubar
- Université de Brest, INSERM, EFS, UMR 1078, GGB, F-29200 Brest, France
| | | | - Florence Campeotto
- Hôpital Necker, AP-HP, Service de Gastroentérologie et Explorations Fonctionnelles Digestives Pédiatriques, Paris Descartes-Sorbonne Paris Cité Université, Institut Imagine, 75015 Paris, France
| | - Nicolas Lebonvallet
- Laboratory of Interactions Keratinocytes Neurons (EA4685), University of Western Brittany, F-29200 Brest, France
| | - Maud Frieden
- Department of Cell Physiology and Metabolism, Geneva Medical Center, CH-1211 Geneva, Switzerland
| | - Juan Llopis
- Centro Regional de Investigaciones Biomédicas (CRIB) and Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, 02002 Albacete, Spain
| | - Beatriz Domingo
- Centro Regional de Investigaciones Biomédicas (CRIB) and Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, 02002 Albacete, Spain
| | - Peter B Stathopulos
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, London, ON N6A 5C1, Canada
| | - Mitsuhiko Ikura
- Department of Medical Biophysics, University of Toronto, Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 2M9, Canada
| | - Wesley Brooks
- Department of Chemistry, University of South Florida, Tampa, FL 33620, USA
| | - Wayne Guida
- Department of Chemistry, University of South Florida, Tampa, FL 33620, USA
| | - Jian-Min Chen
- Université de Brest, INSERM, EFS, UMR 1078, GGB, F-29200 Brest, France
| | - Claude Ferec
- Université de Brest, INSERM, EFS, UMR 1078, GGB, F-29200 Brest, France
| | - Thierry Capiod
- INSERM Unit 1151, Institut Necker Enfants Malades (INEM), Université Paris Descartes, Paris 75014, France
| | - Olivier Mignen
- Université de Brest, INSERM, EFS, UMR 1078, GGB, F-29200 Brest, France .,UMR1227, Lymphocytes B et Autoimmunité, Université de Brest, INSERM, CHU de Brest, BP824, F29609 Brest, France
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7
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Pierre O, Fouchard M, Buscaglia P, Le Goux N, Leschiera R, Mignen O, Fluhr JW, Misery L, Le Garrec R. Calcium Increase and Substance P Release Induced by the Neurotoxin Brevetoxin-1 in Sensory Neurons: Involvement of PAR2 Activation through Both Cathepsin S and Canonical Signaling. Cells 2020; 9:E2704. [PMID: 33348659 PMCID: PMC7767211 DOI: 10.3390/cells9122704] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 12/14/2020] [Accepted: 12/15/2020] [Indexed: 12/17/2022] Open
Abstract
Red tides involving Karenia brevis expose humans to brevetoxins (PbTxs). Oral exposition triggers neurotoxic shellfish poisoning, whereas inhalation induces a respiratory syndrome and sensory disturbances. No curative treatment is available and the pathophysiology is not fully elucidated. Protease-activated receptor 2 (PAR2), cathepsin S (Cat-S) and substance P (SP) release are crucial mediators of the sensory effects of ciguatoxins (CTXs) which are PbTx analogs. This work explored the role of PAR2 and Cat-S in PbTx-1-induced sensory effects and deciphered the signaling pathway involved. We performed calcium imaging, PAR2 immunolocalization and SP release experiments in monocultured sensory neurons or co-cultured with keratinocytes treated with PbTx-1 or P-CTX-2. We demonstrated that PbTx-1-induced calcium increase and SP release involved Cat-S, PAR2 and transient receptor potential vanilloid 4 (TRPV4). The PbTx-1-induced signaling pathway included protein kinase A (PKA) and TRPV4, which are compatible with the PAR2 biased signaling induced by Cat-S. Internalization of PAR2 and protein kinase C (PKC), inositol triphosphate receptor and TRPV4 activation evoked by PbTx-1 are compatible with the PAR2 canonical signaling. Our results suggest that PbTx-1-induced sensory disturbances involve the PAR2-TRPV4 pathway. We identified PAR2, Cat-S, PKA, and PKC that are involved in TRPV4 sensitization induced by PbTx-1 in sensory neurons.
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Affiliation(s)
- Ophélie Pierre
- EA4685 Laboratory of Interactions Neurons-Keratinocytes (LIEN), Faculty of Medicine and Health Sciences, University Brest, F-29200 Brest, France; (M.F.); (R.L.); (J.W.F.); (L.M.); (R.L.G.)
| | - Maxime Fouchard
- EA4685 Laboratory of Interactions Neurons-Keratinocytes (LIEN), Faculty of Medicine and Health Sciences, University Brest, F-29200 Brest, France; (M.F.); (R.L.); (J.W.F.); (L.M.); (R.L.G.)
- Department of Dermatology, University Hospital of Brest, F-29200 Brest, France
| | - Paul Buscaglia
- InsermUMR1227, Lymphocytes B et Autoimmunity, University Brest, F-29200 Brest, France; (P.B.); (N.L.G.); (O.M.)
| | - Nelig Le Goux
- InsermUMR1227, Lymphocytes B et Autoimmunity, University Brest, F-29200 Brest, France; (P.B.); (N.L.G.); (O.M.)
| | - Raphaël Leschiera
- EA4685 Laboratory of Interactions Neurons-Keratinocytes (LIEN), Faculty of Medicine and Health Sciences, University Brest, F-29200 Brest, France; (M.F.); (R.L.); (J.W.F.); (L.M.); (R.L.G.)
| | - Olivier Mignen
- InsermUMR1227, Lymphocytes B et Autoimmunity, University Brest, F-29200 Brest, France; (P.B.); (N.L.G.); (O.M.)
| | - Joachim W. Fluhr
- EA4685 Laboratory of Interactions Neurons-Keratinocytes (LIEN), Faculty of Medicine and Health Sciences, University Brest, F-29200 Brest, France; (M.F.); (R.L.); (J.W.F.); (L.M.); (R.L.G.)
- Department of Dermatology, University Hospital of Brest, F-29200 Brest, France
- Department of Dermatology and Allergology, Universitaetsmedizin Charit Berlin, D-10117 Berlin, Germany
| | - Laurent Misery
- EA4685 Laboratory of Interactions Neurons-Keratinocytes (LIEN), Faculty of Medicine and Health Sciences, University Brest, F-29200 Brest, France; (M.F.); (R.L.); (J.W.F.); (L.M.); (R.L.G.)
- Department of Dermatology, University Hospital of Brest, F-29200 Brest, France
| | - Raphaële Le Garrec
- EA4685 Laboratory of Interactions Neurons-Keratinocytes (LIEN), Faculty of Medicine and Health Sciences, University Brest, F-29200 Brest, France; (M.F.); (R.L.); (J.W.F.); (L.M.); (R.L.G.)
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8
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Pierre O, Fouchard M, Le Goux N, Buscaglia P, Leschiera R, Mignen O, Misery L, Le Garrec R. La ciguatoxine-2 du Pacifique et la brévétoxine-1 entraînent la sensibilisation de récepteurs sensoriels impliqués dans le prurit. Ann Dermatol Venereol 2020. [DOI: 10.1016/j.annder.2020.09.087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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9
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Potier-Cartereau M, Raoul W, Weber G, Mahéo K, Rapetti-Mauss R, Gueguinou M, Buscaglia P, Goupille C, Le Goux N, Abdoul-Azize S, Lecomte T, Fromont G, Chantome A, Mignen O, Soriani O, Vandier C. Potassium and Calcium Channel Complexes as Novel Targets for Cancer Research. Rev Physiol Biochem Pharmacol 2020; 183:157-176. [PMID: 32767122 DOI: 10.1007/112_2020_24] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The intracellular Ca2+ concentration is mainly controlled by Ca2+ channels. These channels form complexes with K+ channels, which function to amplify Ca2+ flux. In cancer cells, voltage-gated/voltage-dependent Ca2+ channels and non-voltage-gated/voltage-independent Ca2+ channels have been reported to interact with K+ channels such as Ca2+-activated K+ channels and voltage-gated K+ channels. These channels are activated by an increase in cytosolic Ca2+ concentration or by membrane depolarization, which induces membrane hyperpolarization, increasing the driving force for Ca2+ flux. These complexes, composed of K+ and Ca2+ channels, are regulated by several molecules including lipids (ether lipids and cholesterol), proteins (e.g. STIM), receptors (e.g. S1R/SIGMAR1), and peptides (e.g. LL-37) and can be targeted by monoclonal antibodies, making them novel targets for cancer research.
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Affiliation(s)
| | - William Raoul
- N2C UMR 1069, University of Tours, INSERM, Tours, France
| | - Gunther Weber
- N2C UMR 1069, University of Tours, INSERM, Tours, France
| | - Karine Mahéo
- N2C UMR 1069, University of Tours, INSERM, Tours, France
| | | | | | - Paul Buscaglia
- LBAI UMR 1227, University of Brest, INSERM, Brest, France
| | - Caroline Goupille
- N2C UMR 1069, University of Tours, INSERM, CHRU de Tours, Tours, France
| | - Nelig Le Goux
- LBAI UMR 1227, University of Brest, INSERM, Brest, France
| | | | - Thierry Lecomte
- EA 7501 GICC, University of Tours, CHRU de Tours, Department of Hepato-Gastroenterology and Digestive Oncology, Tours, France
| | - Gaëlle Fromont
- N2C UMR 1069, University of Tours, INSERM, CHRU de Tours, Department of Pathology, Tours, France
| | | | - Olivier Mignen
- LBAI UMR 1227, University of Brest, INSERM, Brest, France
| | - Olivier Soriani
- iBV, INSERM, CNRS, University of the Côte d'Azur, Nice, France
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10
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Pierre O, L’Herondelle K, Fouyet S, Leschiera R, Le Gall - Ianotto C, Philippe R, Buscaglia P, Mignen O, Misery L, Le Garrec R. 334 Involvement of cathepsin S and protease-activated receptor-2 in ciguatoxin-induced substance P release: new promising targets to treat ciguatera pruritus. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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11
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Debant M, Burgos M, Hemon P, Buscaglia P, Fali T, Melayah S, Le Goux N, Vandier C, Potier-Cartereau M, Pers JO, Tempescul A, Berthou C, Bagacean C, Mignen O, Renaudineau Y. STIM1 at the plasma membrane as a new target in progressive chronic lymphocytic leukemia. J Immunother Cancer 2019; 7:111. [PMID: 31014395 PMCID: PMC6480884 DOI: 10.1186/s40425-019-0591-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 04/02/2019] [Indexed: 12/27/2022] Open
Abstract
Background Dysregulation in calcium (Ca2+) signaling is a hallmark of chronic lymphocytic leukemia (CLL). While the role of the B cell receptor (BCR) Ca2+ pathway has been associated with disease progression, the importance of the newly described constitutive Ca2+ entry (CE) pathway is less clear. In addition, we hypothesized that these differences reflect modifications of the CE pathway and Ca2+ actors such as Orai1, transient receptor potential canonical (TRPC) 1, and stromal interaction molecule 1 (STIM1), the latter being the focus of this study. Methods An extensive analysis of the Ca2+ entry (CE) pathway in CLL B cells was performed including constitutive Ca2+ entry, basal Ca2+ levels, and store operated Ca2+ entry (SOCE) activated following B cell receptor engagement or using Thapsigargin. The molecular characterization of the calcium channels Orai1 and TRPC1 and to their partner STIM1 was performed by flow cytometry and/or Western blotting. Specific siRNAs for Orai1, TRPC1 and STIM1 plus the Orai1 channel blocker Synta66 were used. CLL B cell viability was tested in the presence of an anti-STIM1 monoclonal antibody (mAb, clone GOK) coupled or not with an anti-CD20 mAb, rituximab. The Cox regression model was used to determine the optimal threshold and to stratify patients. Results Seeking to explore the CE pathway, we found in untreated CLL patients that an abnormal CE pathway was (i) highly associated with the disease outcome; (ii) positively correlated with basal Ca2+ concentrations; (iii) independent from the BCR-PLCγ2-InsP3R (SOCE) Ca2+ signaling pathway; (iv) supported by Orai1 and TRPC1 channels; (v) regulated by the pool of STIM1 located in the plasma membrane (STIM1PM); and (vi) blocked when using a mAb targeting STIM1PM. Next, we further established an association between an elevated expression of STIM1PM and clinical outcome. In addition, combining an anti-STIM1 mAb with rituximab significantly reduced in vitro CLL B cell viability within the high STIM1PM CLL subgroup. Conclusions These data establish the critical role of a newly discovered BCR independent Ca2+ entry in CLL evolution, provide new insights into CLL pathophysiology, and support innovative therapeutic perspectives such as targeting STIM1 located at the plasma membrane. Electronic supplementary material The online version of this article (10.1186/s40425-019-0591-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Marjolaine Debant
- INSERM U1227 B lymphocytes and autoimmunity, University of Brest, Brest, France
| | - Miguel Burgos
- INSERM U1227 B lymphocytes and autoimmunity, University of Brest, Brest, France
| | - Patrice Hemon
- INSERM U1227 B lymphocytes and autoimmunity, University of Brest, Brest, France
| | - Paul Buscaglia
- INSERM U1227 B lymphocytes and autoimmunity, University of Brest, Brest, France
| | - Tinhinane Fali
- INSERM U1227 B lymphocytes and autoimmunity, University of Brest, Brest, France
| | - Sarra Melayah
- INSERM U1227 B lymphocytes and autoimmunity, University of Brest, Brest, France.,Laboratory of Immunology and Immunotherapy, CHRU Brest Morvan, Brest, France
| | - Nelig Le Goux
- INSERM U1227 B lymphocytes and autoimmunity, University of Brest, Brest, France
| | - Christophe Vandier
- INSERM U1069, N2C, 37032, University of Tours, Tours, France.,IC-CGO network from "Canceropole Grand Ouest", Brest, France
| | - Marie Potier-Cartereau
- INSERM U1069, N2C, 37032, University of Tours, Tours, France.,IC-CGO network from "Canceropole Grand Ouest", Brest, France
| | | | - Adrian Tempescul
- INSERM U1227 B lymphocytes and autoimmunity, University of Brest, Brest, France.,Department of Haematology, CHRU Brest Morvan, Brest, France
| | - Christian Berthou
- INSERM U1227 B lymphocytes and autoimmunity, University of Brest, Brest, France.,Department of Haematology, CHRU Brest Morvan, Brest, France
| | - Cristina Bagacean
- INSERM U1227 B lymphocytes and autoimmunity, University of Brest, Brest, France.,Laboratory of Immunology and Immunotherapy, CHRU Brest Morvan, Brest, France.,Department of Haematology, CHRU Brest Morvan, Brest, France
| | - Olivier Mignen
- INSERM U1227 B lymphocytes and autoimmunity, University of Brest, Brest, France.,IC-CGO network from "Canceropole Grand Ouest", Brest, France
| | - Yves Renaudineau
- INSERM U1227 B lymphocytes and autoimmunity, University of Brest, Brest, France. .,IC-CGO network from "Canceropole Grand Ouest", Brest, France. .,Laboratory of Immunology and Immunotherapy, CHRU Brest Morvan, Brest, France.
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12
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Gouin O, L'Herondelle K, Buscaglia P, Le Gall-Ianotto C, Philippe R, Legoux N, Mignen O, Buhé V, Leschiera R, Sakka M, Kerfant N, Carré JL, Le Garrec R, Lefeuvre L, Lebonvallet N, Misery L. Major Role for TRPV1 and InsP3R in PAR2-Elicited Inflammatory Mediator Production in Differentiated Human Keratinocytes. J Invest Dermatol 2018; 138:1564-1572. [DOI: 10.1016/j.jid.2018.01.034] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 01/24/2018] [Accepted: 01/28/2018] [Indexed: 11/15/2022]
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13
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Sakka M, Leschiera R, Le Gall-Ianotto C, Gouin O, L'herondelle K, Buscaglia P, Mignen O, Philbé JL, Saguet T, Carré JL, Misery L, Lebonvallet N. A new tool to test active ingredient using lactic acid in vitro, a help to understand cellular mechanism involved in stinging test: An example using a bacterial polysaccharide (Fucogel ® ). Exp Dermatol 2018; 27:238-244. [PMID: 29280518 DOI: 10.1111/exd.13489] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/20/2017] [Indexed: 12/15/2022]
Abstract
The stinging test is an in vivo protocol that evaluates sensitive skin using lactic acid (LA). A soothing sensation of cosmetics or ingredients can be also appreciated through a decrease in stinging score. To predict the soothing sensation of a product before in vivo testing, we developed a model based on an LA test and substance P (SP) release using a co-culture of human keratinocytes and NGF-differentiated PC12 cells. A bacterial fucose-rich polysaccharide present in Fucogel® was evaluated as the soothing molecule in the in vivo stinging test and our in vitro model. Excluding toxic concentrations, the release of SP was significant from 0.2% of lactic acid for the PC12 cells and from 0.1% of lactic acid for the keratinocytes. When the pH was adjusted to approximately 7.4, LA did not provoke SP release. At these concentrations of LA, 0.1% of polysaccharide showed a significant decrease in SP release from the two cellular types and in co-cultures without modifying the pH of the medium. In vivo, a stinging test using the polysaccharide showed a 30% decrease in prickling intensity vs the placebo in 19 women between the ages of 21 and 69. Our in vitro model is ethically interesting and is adapted for cosmetic ingredients screening because it does not use animal experimentation and limits human volunteers. Moreover, Fucogel® reduced prickling sensation as revealed by the in vivo stinging test and inhibits the neurogenic inflammation as showed by our new in vitro stinging test based on SP release.
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Affiliation(s)
- Mehdi Sakka
- Laboratory Interactions Neurons-Keratinocytes, University of Western Brittany, Brest, France
| | - Raphael Leschiera
- Laboratory Interactions Neurons-Keratinocytes, University of Western Brittany, Brest, France
| | | | - Olivier Gouin
- Laboratory Interactions Neurons-Keratinocytes, University of Western Brittany, Brest, France
| | - Killian L'herondelle
- Laboratory Interactions Neurons-Keratinocytes, University of Western Brittany, Brest, France
| | - Paul Buscaglia
- INSERM U1227 "Lymphocyte B et Auto-Immunité", Brest, France
| | - Olivier Mignen
- INSERM U1227 "Lymphocyte B et Auto-Immunité", Brest, France
| | | | | | - Jean-Luc Carré
- Laboratory Interactions Neurons-Keratinocytes, University of Western Brittany, Brest, France
| | - Laurent Misery
- Laboratory Interactions Neurons-Keratinocytes, University of Western Brittany, Brest, France
| | - Nicolas Lebonvallet
- Laboratory Interactions Neurons-Keratinocytes, University of Western Brittany, Brest, France
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14
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Mignen O, Constantin B, Potier-Cartereau M, Penna A, Gautier M, Guéguinou M, Renaudineau Y, Shoji KF, Félix R, Bayet E, Buscaglia P, Debant M, Chantôme A, Vandier C. Constitutive calcium entry and cancer: updated views and insights. Eur Biophys J 2017; 46:395-413. [PMID: 28516266 DOI: 10.1007/s00249-017-1216-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 03/10/2017] [Accepted: 04/26/2017] [Indexed: 12/20/2022]
Abstract
Tight control of basal cytosolic Ca2+ concentration is essential for cell survival and to fine-tune Ca2+-dependent cell functions. A way to control this basal cytosolic Ca2+ concentration is to regulate membrane Ca2+ channels including store-operated Ca2+ channels and secondary messenger-operated channels linked to G-protein-coupled or tyrosine kinase receptor activation. Orai, with or without its reticular STIM partner and Transient Receptor Potential (TRP) proteins, were considered to be the main Ca2+ channels involved. It is well accepted that, in response to cell stimulation, opening of these Ca2+ channels contributes to Ca2+ entry and the transient increase in cytosolic Ca2+ concentration involved in intracellular signaling. However, in various experimental conditions, Ca2+ entry and/or Ca2+ currents can be recorded at rest, without application of any experimental stimulation. This led to the proposition that some plasma membrane Ca2+ channels are already open/activated in basal condition, contributing therefore to constitutive Ca2+ entry. This article focuses on direct and indirect observations supporting constitutive activity of channels belonging to the Orai and TRP families and on the mechanisms underlying their basal/constitutive activities.
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Affiliation(s)
- Olivier Mignen
- Inserm UMR 1078 IFR148 Université de Bretagne Occidentale, Brest, France
- Network "Ion Channels and Cancer-Canceropôle Grand Ouest", (IC-CGO), Grand Ouest, France
| | - Bruno Constantin
- STIM, ERL 7368 CNRS Université de Poitiers, Poitiers, France
- Network "Ion Channels and Cancer-Canceropôle Grand Ouest", (IC-CGO), Grand Ouest, France
| | - Marie Potier-Cartereau
- Inserm/University of Tours U1069, Nutrition-Croissance et Cancer (N2C), 37032, Tours, France
- Network "Ion Channels and Cancer-Canceropôle Grand Ouest", (IC-CGO), Grand Ouest, France
| | - Aubin Penna
- IRSET, Inserm U1085, University of Rennes 1, 36043, Rennes, France
- Network "Ion Channels and Cancer-Canceropôle Grand Ouest", (IC-CGO), Grand Ouest, France
| | - Mathieu Gautier
- EA4667, Université de Picardie Jules Verne, 80039, Amiens, France
| | - Maxime Guéguinou
- Inserm/University of Tours U1069, Nutrition-Croissance et Cancer (N2C), 37032, Tours, France
- Network "Ion Channels and Cancer-Canceropôle Grand Ouest", (IC-CGO), Grand Ouest, France
| | - Yves Renaudineau
- EA 2216, Inserm ESPRI, ERI 29, Brest, France
- Network "Ion Channels and Cancer-Canceropôle Grand Ouest", (IC-CGO), Grand Ouest, France
| | - Kenji F Shoji
- IRSET, Inserm U1085, University of Rennes 1, 36043, Rennes, France
- Network "Ion Channels and Cancer-Canceropôle Grand Ouest", (IC-CGO), Grand Ouest, France
| | - Romain Félix
- Inserm/University of Tours U1069, Nutrition-Croissance et Cancer (N2C), 37032, Tours, France
- Network "Ion Channels and Cancer-Canceropôle Grand Ouest", (IC-CGO), Grand Ouest, France
| | - Elsa Bayet
- STIM, ERL 7368 CNRS Université de Poitiers, Poitiers, France
- IRSET, Inserm U1085, University of Rennes 1, 36043, Rennes, France
- Network "Ion Channels and Cancer-Canceropôle Grand Ouest", (IC-CGO), Grand Ouest, France
| | - Paul Buscaglia
- Inserm UMR 1078 IFR148 Université de Bretagne Occidentale, Brest, France
- Network "Ion Channels and Cancer-Canceropôle Grand Ouest", (IC-CGO), Grand Ouest, France
| | - Marjolaine Debant
- Inserm UMR 1078 IFR148 Université de Bretagne Occidentale, Brest, France
- EA 2216, Inserm ESPRI, ERI 29, Brest, France
- Network "Ion Channels and Cancer-Canceropôle Grand Ouest", (IC-CGO), Grand Ouest, France
| | - Aurélie Chantôme
- Inserm/University of Tours U1069, Nutrition-Croissance et Cancer (N2C), 37032, Tours, France
- Network "Ion Channels and Cancer-Canceropôle Grand Ouest", (IC-CGO), Grand Ouest, France
| | - Christophe Vandier
- Inserm/University of Tours U1069, Nutrition-Croissance et Cancer (N2C), 37032, Tours, France.
- Network "Ion Channels and Cancer-Canceropôle Grand Ouest", (IC-CGO), Grand Ouest, France.
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15
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Mukherjee S, Karolak A, Debant M, Buscaglia P, Renaudineau Y, Mignen O, Guida WC, Brooks WH. Molecular Dynamics Simulations of Membrane-Bound STIM1 to Investigate Conformational Changes during STIM1 Activation upon Calcium Release. J Chem Inf Model 2017; 57:335-344. [PMID: 28151650 DOI: 10.1021/acs.jcim.6b00475] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Calcium is involved in important intracellular processes, such as intracellular signaling from cell membrane receptors to the nucleus. Typically, calcium levels are kept at less than 100 nM in the nucleus and cytosol, but some calcium is stored in the endoplasmic reticulum (ER) lumen for rapid release to activate intracellular calcium-dependent functions. Stromal interacting molecule 1 (STIM1) plays a critical role in early sensing of changes in the ER's calcium level, especially when there is a sudden release of stored calcium from the ER. Inactive STIM1, which has a bound calcium ion, is activated upon ion release. Following activation of STIM1, there is STIM1-assisted initiation of extracellular calcium entry through channels in the cell membrane. This extracellular calcium entering the cell then amplifies intracellular calcium-dependent actions. At the end of the process, ER levels of stored calcium are reestablished. The main focus of this work was to study the conformational changes accompanying homo- or heterodimerization of STIM1. For this purpose, the ER luminal portion of STIM1 (residues 58-236), which includes the sterile alpha motif (SAM) domain plus the calcium-binding EF-hand domains 1 and 2 attached to the STIM1 transmembrane region (TM), was modeled and embedded in a virtual membrane. Next, molecular dynamics simulations were performed to study the conformational changes that take place during STIM1 activation and subsequent protein-protein interactions. Indeed, the simulations revealed exposure of residues in the EF-hand domains, which may be important for dimerization steps. Altogether, understanding conformational changes in STIM1 can help in drug discovery when targeting this key protein in intracellular calcium functions.
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Affiliation(s)
- Sreya Mukherjee
- Department of Chemistry, University of South Florida , Tampa, Florida 33620, United States
| | - Aleksandra Karolak
- Department of Chemistry, University of South Florida , Tampa, Florida 33620, United States
| | - Marjolaine Debant
- INSERM ESPRI, ERI29/EA2216 Laboratory of Immunotherapy and B Cell Pathologies, Laboratory of Immunology and Immunotherapy, CHRU Morvan, European University of Brittany , F29609 Brest, France.,Network "Ion channels and cancer-Cancéropole Grand Ouest (IC-CGO)" , F29609 Brest, France.,INSERM U1078, Brest University Medical School , F29609 Brest, France
| | - Paul Buscaglia
- Network "Ion channels and cancer-Cancéropole Grand Ouest (IC-CGO)" , F29609 Brest, France.,INSERM U1078, Brest University Medical School , F29609 Brest, France
| | - Yves Renaudineau
- INSERM ESPRI, ERI29/EA2216 Laboratory of Immunotherapy and B Cell Pathologies, Laboratory of Immunology and Immunotherapy, CHRU Morvan, European University of Brittany , F29609 Brest, France.,Network "Ion channels and cancer-Cancéropole Grand Ouest (IC-CGO)" , F29609 Brest, France
| | - Olivier Mignen
- Network "Ion channels and cancer-Cancéropole Grand Ouest (IC-CGO)" , F29609 Brest, France.,INSERM U1078, Brest University Medical School , F29609 Brest, France
| | - Wayne C Guida
- Department of Chemistry, University of South Florida , Tampa, Florida 33620, United States
| | - Wesley H Brooks
- Department of Chemistry, University of South Florida , Tampa, Florida 33620, United States
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16
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Huguet F, Calvez ML, Benz N, Le Hir S, Mignen O, Buscaglia P, Horgen FD, Férec C, Kerbiriou M, Trouvé P. Function and regulation of TRPM7, as well as intracellular magnesium content, are altered in cells expressing ΔF508-CFTR and G551D-CFTR. Cell Mol Life Sci 2016; 73:3351-73. [PMID: 26874684 DOI: 10.1007/s00018-016-2149-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 01/14/2016] [Accepted: 01/25/2016] [Indexed: 02/03/2023]
Abstract
Cystic fibrosis (CF), one of the most common fatal hereditary disorders, is caused by mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene. The CFTR gene product is a multidomain adenosine triphosphate-binding cassette (ABC) protein that functions as a chloride (Cl(-)) channel that is regulated by intracellular magnesium [Mg(2+)]i. The most common mutations in CFTR are a deletion of a phenylalanine residue at position 508 (ΔF508-CFTR, 70-80 % of CF phenotypes) and a Gly551Asp substitution (G551D-CFTR, 4-5 % of alleles), which lead to decreased or almost abolished Cl(-) channel function, respectively. Magnesium ions have to be finely regulated within cells for optimal expression and function of CFTR. Therefore, the melastatin-like transient receptor potential cation channel, subfamily M, member 7 (TRPM7), which is responsible for Mg(2+) entry, was studies and [Mg(2+)]i measured in cells stably expressing wildtype CFTR, and two mutant proteins (ΔF508-CFTR and G551D-CFTR). This study shows for the first time that [Mg(2+)]i is decreased in cells expressing ΔF508-CFTR and G551D-CFTR mutated proteins. It was also observed that the expression of the TRPM7 protein is increased; however, membrane localization was altered for both ΔF508del-CFTR and G551D-CFTR. Furthermore, both the function and regulation of the TRPM7 channel regarding Mg(2+) is decreased in the cells expressing the mutated CFTR. Ca(2+) influx via TRPM7 were also modified in cells expressing a mutated CFTR. Therefore, there appears to be a direct involvement of TRPM7 in CF physiopathology. Finally, we propose that the TRPM7 activator Naltriben is a new potentiator for G551D-CFTR as the function of this mutant increases upon activation of TRPM7 by Naltriben.
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Affiliation(s)
- F Huguet
- Inserm, UMR1078, 46, rue Félix le Dantec, CS 51819, 29218, Brest Cedex 2, France.,Faculté de Médecine et des sciences de la santé, Université de Bretagne Occidentale, Brest, 29200, France
| | - M L Calvez
- Inserm, UMR1078, 46, rue Félix le Dantec, CS 51819, 29218, Brest Cedex 2, France.,Faculté de Médecine et des sciences de la santé, Université de Bretagne Occidentale, Brest, 29200, France.,Association G. Saleun, Brest, 29218, France
| | - N Benz
- Inserm, UMR1078, 46, rue Félix le Dantec, CS 51819, 29218, Brest Cedex 2, France.,Association G. Saleun, Brest, 29218, France
| | - S Le Hir
- Inserm, UMR1078, 46, rue Félix le Dantec, CS 51819, 29218, Brest Cedex 2, France.,Laboratoire de Génétique Moléculaire, Hôpital Morvan, C.H.U. Brest, Brest, 29200, France
| | - O Mignen
- Inserm, UMR1078, 46, rue Félix le Dantec, CS 51819, 29218, Brest Cedex 2, France.,Faculté de Médecine et des sciences de la santé, Université de Bretagne Occidentale, Brest, 29200, France
| | - P Buscaglia
- Inserm, UMR1078, 46, rue Félix le Dantec, CS 51819, 29218, Brest Cedex 2, France.,Faculté de Médecine et des sciences de la santé, Université de Bretagne Occidentale, Brest, 29200, France
| | - F D Horgen
- Laboratory of Marine Biological Chemistry, Department of Natural Sciences, Hawaii Pacific University, Kaneohe, HI, 96744, USA
| | - C Férec
- Inserm, UMR1078, 46, rue Félix le Dantec, CS 51819, 29218, Brest Cedex 2, France. .,Faculté de Médecine et des sciences de la santé, Université de Bretagne Occidentale, Brest, 29200, France. .,Laboratoire de Génétique Moléculaire, Hôpital Morvan, C.H.U. Brest, Brest, 29200, France. .,Etablissement Français du Sang - Bretagne, Brest, 29200, France.
| | - M Kerbiriou
- Inserm, UMR1078, 46, rue Félix le Dantec, CS 51819, 29218, Brest Cedex 2, France.,Faculté de Médecine et des sciences de la santé, Université de Bretagne Occidentale, Brest, 29200, France
| | - P Trouvé
- Inserm, UMR1078, 46, rue Félix le Dantec, CS 51819, 29218, Brest Cedex 2, France.
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Philippe R, Antigny F, Buscaglia P, Norez C, Becq F, Frieden M, Mignen O. SERCA and PMCA pumps contribute to the deregulation of Ca2+ homeostasis in human CF epithelial cells. Biochim Biophys Acta 2015; 1853:892-903. [PMID: 25661196 DOI: 10.1016/j.bbamcr.2015.01.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 01/12/2015] [Accepted: 01/15/2015] [Indexed: 11/26/2022]
Abstract
Cystic Fibrosis (CF) disease is caused by mutations in the CFTR gene (CF transmembrane conductance regulator). F508 deletion is the most represented mutation, and F508del-CFTR is absent of plasma membrane and accumulates into the endoplasmic reticulum (ER) compartment. Using specific Ca2+ genetics cameleon probes, we showed in the human bronchial CF epithelial cell line CFBE that ER Ca2+ concentration was strongly increased compared to non-CF (16HBE) cells, and normalized by the F508del-CFTR corrector agent, VX-809. We also showed that ER F508del-CFTR retention increases SERCA (Sarcoplasmic/Reticulum Ca2+ ATPase) pump activity whereas PMCA (Plasma Membrane Ca2+ ATPase) activities were reduced in these CF cells compared to corrected CF cells (VX-809) and non-CF cells. We are showing for the first time CFTR/SERCA and CFTR/PMCA interactions that are modulated in CF cells and could explain part of Ca2+ homeostasis deregulation due to mislocalization of F508del-CFTR. Using ER or mitochondria genetics Ca2+ probes, we are showing that ER Ca2+ content, mitochondrial Ca2+ uptake, SERCA and PMCA pump, activities are strongly affected by the localization of F508del-CFTR protein.
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Affiliation(s)
- Réginald Philippe
- NSERM U1078, Université Bretagne Occidentale, 22 Avenue Camille Desmoulins, 29200 Brest, France
| | - Fabrice Antigny
- Department of Basic Neurosciences, 1, Rue Michel Servet, 1211 Geneva 4, Switzerland
| | - Paul Buscaglia
- NSERM U1078, Université Bretagne Occidentale, 22 Avenue Camille Desmoulins, 29200 Brest, France
| | - Caroline Norez
- Laboratoire Signalisation et Transport Ioniques Membranaires, Université Poitiers-CNRS Pole Biologie Santé, 1 rue George Bonnet, 86073 Poitiers Cedex, France
| | - Frédéric Becq
- Laboratoire Signalisation et Transport Ioniques Membranaires, Université Poitiers-CNRS Pole Biologie Santé, 1 rue George Bonnet, 86073 Poitiers Cedex, France
| | - Maud Frieden
- Cell Physiology and Metabolism University of Geneva Medical School, 1, Rue Michel Servet, 1211 Geneva 4, Switzerland
| | - Olivier Mignen
- NSERM U1078, Université Bretagne Occidentale, 22 Avenue Camille Desmoulins, 29200 Brest, France.
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18
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Re A, Albertin F, Bortolin C, Brancaccio R, Buscaglia P, Corsi J, Cotto G, Dughera G, Durisi E, Ferrarese W, Gambaccini M, Giovagnoli A, Grassi N, Lo Giudice A, Mereu P, Mila G, Nervo M, Pastrone N, Petrucci F, Prino F, Ramello L, Ravera M, Ricci C, Romero A, Sacchi R, Staiano A, Visca L, Zamprotta L. Results of the Italian neu_ART project. ACTA ACUST UNITED AC 2012. [DOI: 10.1088/1757-899x/37/1/012007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Luraschi A, Buscaglia P, Fedeli P, Montanara S, Uccelli E, Antonietti MP. [Myelodysplastic syndromes. Clinico-pathologic analysis of 54 cases]. Recenti Prog Med 2001; 92:521-9. [PMID: 11552307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
UNLABELLED For myelodysplastic syndromes (MDS) many scoring systems were developed to improve the prognostic stratification of patients. METHODS AND AIM OF THE STUDY We enrolled 54 primary MDS patients, having an advanced median age of 78.5 years, that discouraged the choice of aggressive treatments. Then, we employed only the Bournemouth score (without cytogenetic analysis), with the aim to identify the best predictor of death and of AML development. RESULTS Both for overall and leukemia-free analysis, shorter survival and faster development of AML were found in MDS patients with severe peripheral cytopenia, RAEB-T, major proportion of bone marrow blasts (over 20%) and with the higher Bournemouth score (i.e. 3-4). The multivariate analysis by the Cox's regression model showed that a high percentage of bone marrow blasts presented the best statistical significance. CONCLUSIONS In our survey we confirmed the value of Bournemouth score in identifying those MDS patients presenting a greater risk of death and AML development. Moreover, a high percentage of bone marrow blasts rose as the best predictor of death and leukemic evolution. The kariotypic analysis, with a stronger prognostic power but also complex and expensive, was not performed in our elderly MDS patients, who were unable to tolerate aggressive treatments.
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Affiliation(s)
- A Luraschi
- Divisione di Medicina, Ospedale di Omegna, Omegna
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20
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Gazzaruso C, Garzaniti A, Buscaglia P, Bonetti G, Falcone C, Fratino P, Finardi G, Geroldi D. Association between apolipoprotein(a) phenotypes and coronary heart disease at a young age. J Am Coll Cardiol 1999; 33:157-63. [PMID: 9935023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
OBJECTIVES The purpose of this study was to investigate lipoprotein(a) [Lp(a)] levels and apolipoprotein(a) [apo(a)] phenotypes in relation to age of onset of coronary heart disease (CHD). BACKGROUND Although Lp(a) levels have been extensively analyzed in relation to age of CHD, apo(a) phenotypes have not. METHODS Three hundred and thirty-five consecutive CHD patients were enrolled and grouped according to their age of CHD onset (<45 years; 45 to 54 years; > or = 55 years). RESULTS In each patient group Lp(a) levels were higher than in an age-matched control group, but among the patient groups no differences in Lp(a) levels were observed. Apolipoprotein(a) phenotype distributions showed significant differences between patients and age-matched control subjects. Among the patient groups the difference in percentage of subjects with two apo(a) isoforms of low molecular weight (MW) was highly significant (p < 0.001). Multivariate analysis showed that apo(a) phenotypes were the best predictors of early CHD (p < 0.000001). The age-specific odds ratios (ORs) of the presence of at least one apo(a) isoform of low MW for CHD declined with age; in particular apo(a) phenotypes had their highest predictive value in younger persons (OR: 14.62). The OR for the presence of two isoforms of low MW/presence of only isoforms of high MW was 40.88 in the younger age group, 27.17 in age group of 45 to 54 years and 15.83 in the older age group. CONCLUSIONS The present article reports the first evidence of a strong independent association of apo(a) phenotypes with the age of onset of CHD. Thus, if our data are confirmed by larger studies, apo(a) phenotypes might be used together with Lp(a) levels as powerful genetic markers in assessing the actual risk of developing CHD at a young age.
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Affiliation(s)
- C Gazzaruso
- Department of Internal Medicine and Medical Therapeutics, IRCCS Policlinico San Matteo, University of Pavia, Italy
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21
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Gazzaruso C, Geroldi D, Garzaniti A, Falcone C, Fratino P, Finardi G, Buscaglia P. Apolipoprotein(a) phenotypes as genetic markers of coronary atherosclerosis severity. Int J Cardiol 1998; 64:277-84. [PMID: 9672409 DOI: 10.1016/s0167-5273(98)00050-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
We investigated Lp(a) levels and apo(a) polymorphism in relation to the severity of coronary artery disease, expressed both by the number of coronary arteries stenosed and three different coronary scoring systems. In a sample of 267 patients with coronary artery disease, a Mono-, Bi- or Multi-vessel coronary stenosis was documented by angiography. Twenty-five apo(a) isoforms were detected by a high resolution phenotyping method. Lp(a) levels did not show any differences among subgroups of patients. Both the percentage of apo(a) isoforms of low molecular weight (<655 kDa) (P=0.00015) and the percentage of subjects with at least one apo(a) isoform of low molecular weight (P=0.00027) were significantly correlated with increasing number of coronary vessels stenosed. In multivariate analysis, only apo(a) isoforms of low molecular weight were predictors of coronary atherosclerosis severity, when we used as the dependent variable both the '1-2-multi-vessels' categorization (P=0.000067) and the Gensini (P=0.008767), or Green Lane (P= 0.000001) or Dahlen (P=0.000102) coronary scoring system. Our data show that apo(a) isoforms of low molecular weight are associated with a greater severity of coronary atherosclerosis. If these data are confirmed by prospective studies, apo(a) phenotypes might be used as genetic markers of a greater severity of coronary atherosclerotic lesions.
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Affiliation(s)
- C Gazzaruso
- Department of Internal Medicine and Medical Therapeutics, IRCCS Policlinico San Matteo, University of Pavia, Italy
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22
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Gazzaruso C, Garzaniti A, Buscaglia P, D'Annunzio G, Porta A, Vandelli G, Lorini R, Finardi G, Fratino P, Geroldi D. Lipoprotein(a) levels and apolipoprotein(a) polymorphism in type 1 diabetes mellitus: relationships to microvascular and neurological complications. Acta Diabetol 1998; 35:13-8. [PMID: 9625284 DOI: 10.1007/s005920050095] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
To investigate plasma concentrations of lipoprotein(a) [Lp(a)] and apolipoprotein(a) [apo(a)] polymorphism in relation to the presence of microvascular and neurological complications in type 1 diabetes mellitus, 118 young diabetic patients and 127 age-matched controls were recruited. Lp(a) levels were higher in patients than in controls, but the apo(a) isoforms distribution did not differ between the two groups [higher prevalence of isoforms of high relative molecular mass (RMM) in both groups]. Microalbuminuric patients had Lp(a) levels significantly greater than normoalbuminuric patients, and normoalbuminuric patients showed higher Lp(a) levels than controls. Patients with retinopathy or neuropathy showed similar Lp(a) levels to those without retinopathy or neuropathy. No differences in apo(a) isoforms frequencies were observed between subgroups with and without complications (higher prevalence of isoforms of high RMM in every subgroup). However, among patients with retinopathy, those with proliferative retinopathy had higher Lp(a) levels and a different apo(a) isoforms distribution (higher prevalence of isoforms of low RMM) than those with non-proliferative and background retinopathy (higher prevalence of isoforms of high RMM). Our data suggest that young type 1 diabetic patients without microalbuminuria have Lp(a) levels higher than healthy subjects of the same age. Lp(a) levels are further increased in microalbuminuric patients. High Lp(a) levels and apo(a) isoforms of low RMM seem to be associated with the presence of proliferative retinopathy, but have no relation to neuropathy.
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Affiliation(s)
- C Gazzaruso
- Department of Internal Medicine and Medical Therapeutics, IRCCS Policlinico San Matteo, University of Pavia, Italy
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Gazzaruso C, Garzaniti A, Buscaglia P, Bonetti G, Falcone C, Fratino P, Finardi G, Geroldi D. Apolipoprotein(a) phenotypes and their predictive value for coronary heart disease: identification of an operative cut-off of apolipoprotein(a) polymorphism. J Cardiovasc Risk 1998; 5:37-42. [PMID: 9816554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
BACKGROUND Apolipoprotein(a) isoforms of low-molecular weight are associated with coronary heart disease. However, because of the high number of apolipoprotein(a) isoforms, it is difficult to assess the cardiovascular risk linked to the apolipoprotein(a) gene of a subject; indeed a cut-off of apolipoprotein(a) polymorphism has not been established. The aim of this investigation was to identify an 'operative' cut-off that discriminates apolipoprotein(a) isoforms associated with high genetic risk for coronary heart disease. METHODS Two hundred and fifty-one patients with coronary heart disease and 284 controls were recruited. Apolipoprotein(a) isoforms were detected using a high-resolution phenotyping method. RESULTS Twenty-seven apolipoprotein(a) isoforms with apparent molecular weight varying from 280 to 820 kDa were identified. Several cut-offs of apolipoprotein(a) polymorphism were used in order to compare the frequencies of apolipoprotein(a) isoforms of low and high molecular weight between patients and controls: the cut-off between 640 and 655 kDa had the highest chi 2 (130.40). Even when possible differences in apolipoprotein(a) phenotypes (subjects with at least one isoform of low molecular weight and subjects with only isoforms of high molecular weight) were assessed, the same cut-off showed the highest chi 2 (122.47). Multivariate analysis showed that apolipoprotein (a) isoforms had the greatest predictive value for coronary heart disease (F value = 107.0720), when the cut-off between 640 and 655 kDa was used. CONCLUSIONS The cut-off between 640 and 655 kDa appears to be the most efficient in identifying subjects at high cardiovascular risk linked to apolipoprotein(a) gene, since this cut-off discriminates apolipoprotein(a) isoforms expressing a greater risk for coronary heart disease.
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Affiliation(s)
- C Gazzaruso
- Department of Internal Medicine and Medical Therapeutics, IRCCS, Policlinico San Matteo, University of Pavia, Italy
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Gazzaruso C, Buscaglia P, Garzaniti A, Falcone C, Mariotti S, Savino S, Bonetti G, Finardi G, Geroldi D. Association of lipoprotein(a) levels and apolipoprotein(a) phenotypes with coronary heart disease in patients with essential hypertension. J Hypertens 1997; 15:227-35. [PMID: 9468449 DOI: 10.1097/00004872-199715030-00003] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Besides hypertension, several cardiovascular risk factors can play a role in the development of coronary heart disease (CHD) in hypertensive patients. Lipoprotein(a) [Lp(a)] is an important and independent cardiovascular risk factor, but its role in the development of CHD in hypertensives has not been studied. OBJECTIVE To investigate whether or not Lp(a) levels and isoforms of apolipoprotein(a) [apo(a)] are predictors of CHD in patients with essential hypertension. METHODS Lp(a) levels and apo(a) polymorphism were evaluated in 249 patients with essential hypertension, in 142 non-hypertensive patients with CHD and in 264 healthy controls. RESULTS Hypertensives with CHD (n = 61) had Lp(a) levels [19 (range 0.5-73.5) versus 7 mg/dl (range 0-83.5), P < 0.001] and a percentage of apo(a) isoforms of low (< 655 kDa) relative molecular mass (RMM, 59.2 versus 25.9%, P < 0.001) higher than did those without CHD (n = 188). Moreover, there were more subjects with at least one apo(a) isoform of low RMM in the subgroup of patients with CHD than there were in that of those without CHD (80.3 versus 30.8%, P< 0.001). Lp(a) levels and apo(a) polymorphism did not differ significantly between hypertensive and non-hypertensive patients with CHD. Stepwise regression analysis indicated that high Lp(a) levels (P= 0.002073) and particularly the presence of at least one apo(a) isoform of low RMM (P < 0.000001) are strong predictors of CHD in hypertensive patients. CONCLUSIONS Our data show that high Lp(a) levels and the presence of at least one apo(a) isoform of low RMM are strong and independent genetic risk factors for CHD in hypertensive patients. These findings suggest that Lp(a) and apo(a) isoforms should be assessed together with other cardiovascular risk factors to establish the overall CHD risk status of each hypertensive patient
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Affiliation(s)
- C Gazzaruso
- Department of Internal Medicine and Medical Therapeutics, IRCCS Policlinico San Matteo, University of Pavia, Italy
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Gazzaruso C, Buscaglia P, Garzaniti A, Bonetti G, Savino S, Mariotti S, Jucci A, Finardi G, Geroldi D. Lipoprotein(a) plasma concentrations, apolipoprotein (a) polymorphism and family history of coronary heart disease in patients with essential hypertension. J Cardiovasc Risk 1996; 3:191-197. [PMID: 8836862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
AIM The purpose of the study was to investigate lipoprotein (a) (Lp(a)) levels and apolipoprotein (a) (apo(a)) phenotypes, and their relationship with a family history of coronary heart disease (CHD) in patients with essential hypertension (EH). METHODS One hundred and eight newly diagnosed patients with mild to moderate EH and 159 controls were studied. Lp(a) levels were determined with an ELISA method. Apo(a) isoforms were identified by a capillary immunoblotting technique. RESULTS Lp(a) levels and frequency distribution of apo(a) isoforms did not show significant differences between patients and controls. Lp(a) levels in hypertensives with a family history of CHD were significantly higher than in those without a family history of CHD (P < 0.01). Hypertensives with a family history of CHD showed significantly different frequencies of apo(a) isoforms to those without a family history of CHD (P < 0.05). In EH patients with a family history of CHD, apo(a) isoforms of low molecular weight (MW) had a higher prevalence (62.6%), while in hypertensives without a family history of CHD, apo(a) isoforms of high MW were prevalent (81.6%); the difference between the two subgroups was significant (P < 0.001). Multivariate analysis showed that both Lp(a) levels and apo(a) isoforms of low MW are significant variables in distinguishing between the subgroups. CONCLUSIONS Lp(a) levels and apo(a) phenotypes do not differ between hypertensives and controls. High Lp(a) levels and apo(a) isoforms of low MW are strongly associated with a family history of CHD in hypertensives. The quantification of Lp(a) levels and the characterization of apo(a) phenotypes may be used for assessment of familial predisposition to CHD in hypertensives.
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Affiliation(s)
- C Gazzaruso
- Department of Internal Medicine and Medical Therapeutics, First Medical Clinic, IRCCS Policlinico San Matteo, University of Pavia, Italy
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Buscaglia P, Gazzaruso C, Garzaniti A, Bonetti G, Fratino P, Geroldi D. Lipoprotein(a), apolipoprotein(a) polymorphism, and insulin treatment in type II diabetic patients. Diabetes Care 1995; 18:1202-3. [PMID: 7587865 DOI: 10.2337/diacare.18.8.1202] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Geroldi D, Gazzaruso C, Garzaniti A, Buscaglia P, Bonetti G, Auguadro C, Chioffi M, Falcone C, Bobbio-Pallavicini E, Fratino P, Finardi G. Apo(a) isoforms: a genetic marker for progression of coronary atherosclerosis. Atherosclerosis 1994. [DOI: 10.1016/0021-9150(94)94132-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Geroldi D, Bellotti V, Buscaglia P, Bonetti G, Gazzaruso C, Caprioli A, Fratino P. Characterization of apo(a) polymorphism by a modified immunoblotting technique in an Italian population sample. Clin Chim Acta 1993; 221:159-69. [PMID: 8149633 DOI: 10.1016/0009-8981(93)90030-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Apo(a), the specific lipoprotein(a) (Lp(a)) apolipoprotein, is characterized by different isoforms (from 6 to 11 on SDS-PAGE) encoded by a system of autosomal codominant alleles. Electrophoresis on agarose gel displays a better resolving power than SDS-PAGE (a larger number of apo(a) isoforms is detected). The aim of this work was to set up a simple technique that uses a capillary blotting apparatus and a polyvinylidene difluoride membrane for protein transfer. We tested an Italian population sample of 202 healthy subjects (123 men and 79 women) and we detected 22 apo(a) isoforms varying from 280 to 775 kDa. In our sample, 135 subjects (66.5%) had a single-band phenotype, 64 (31.7%) had a double-band phenotype and 3 subjects (1.5%) had no detectable bands ('null' phenotype). This simple and reproducible technique could be applied in the genetic screening of apo(a) polymorphisms and for clinical investigations of the risk of developing cardiovascular diseases.
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Affiliation(s)
- D Geroldi
- Department of Internal Medicine, University of Pavia, IRCCS Policlinico San Matteo, Italy
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