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Corcia P, Vourc'h P, Bernard E, Cassereau J, Codron P, Fleury MC, Guy N, Mouzat K, Pradat PF, Soriani MH, Couratier P. French National Protocol for genetic of amyotrophic lateral sclerosis. Rev Neurol (Paris) 2023; 179:1020-1029. [PMID: 37735015 DOI: 10.1016/j.neurol.2023.05.005] [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: 04/06/2023] [Revised: 05/16/2023] [Accepted: 05/17/2023] [Indexed: 09/23/2023]
Abstract
Relationships between genes and amyotrophic lateral sclerosis (ALS) have been widely accepted since the first studies highlighting pathogenic mutations in the SOD1 gene 30years ago. Over the last three decades, scientific literature has clearly highlighted the central role played by genetic factors in the disease, in both clinics and pathophysiology, as well as in therapeutics. This implies that health professionals who care for patients with ALS are increasingly faced with patients and relatives eager to have answers to questions related to the role of genetic factors in the occurrence of the disease and the risk for their relatives to develop ALS. In order to address these public health issues, the French ALS network FILSLAN proposed to the Haute Autorité de santé (HAS) the drafting of a French National Protocol (PNDS) on ALS genetics. This PNDS was developed according to the "method for developing a national diagnosis and care protocol for rare diseases" published by the HAS in 2012 (methodological guide for PNDS available on the HAS website: http://www.has-sante.fr/). This document aims to provide the most recent data on the role of genes in ALS and to detail the implications for diagnosis and care.
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Affiliation(s)
- P Corcia
- CRMR SLA, CHRU Bretonneau, Tours, France; UMR 1253 iBrain, Tours, France.
| | - P Vourc'h
- UMR 1253 iBrain, Tours, France; Laboratoire de biochimie et biologie moléculaire, CHRU Bretonneau, Tours, France
| | | | | | - P Codron
- CRMR SLA, CHU d'Angers, Angers, France
| | - M-C Fleury
- CRC SLA, CHU de Strasbourg, Strasbourg, France
| | - N Guy
- CRC SLA, CHU de Clermont-Ferrand, Clermont-Ferrand, France
| | - K Mouzat
- Laboratoire de biochimie et biologie moléculaire, CHU de Nîmes, Nîmes, France
| | - P-F Pradat
- CRMR SLA, CHU Pitié-Salpêtrière, Paris, France
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Altinsoy I, Guy N, Ozacar M, Bindal C. Preparation of ZnWO4 (Sanmartinite) Powder Through Mechanochemical Method for Visible Light-Induced Photocatalysis. Arab J Sci Eng 2021. [DOI: 10.1007/s13369-020-04859-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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3
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Lavie C, Rollot F, Durand-Dubief F, Marignier R, Ionescu I, Casey R, Moreau T, Tourniaire P, Hutchinson M, D’Hooghe MB, Laplaud DA, Clavelou P, De Sèze J, Debouverie M, Brassat D, Pelletier J, Lebrun-Frenay C, Le Page E, Castelnovo G, Berger E, Hautecoeur P, Heinzlef O, Durelli L, Clerico M, Trojano M, Patti F, Vukusic S, Alpérovitch A, Carton H, d’Hooghe M, Hommes O, Hutchinson M, Adeleine P, Biron A, Cortinovis-Tourniaire P, Grimaud J, Hours M, Moreau T, Vukusic S, Confavreux C, Chauplannaz G, Confavreux C, Cortinovis-Tourniaire P, Grimaud J, Latombe D, Moreau T, Clanet M, Lau G, Rumbach L, Goas J, Rouhart F, Mazingue A, Roullet E, Madigand M, Hautecoeur P, Brunet P, Edan G, Allaire C, Riffault G, Leche J, Benoit T, Simonin C, Ziegler F, Baron J, Rivrain Y, Dumas R, Loche D, Bourrin J, Huttin B, Delisse B, Gibert I, Boulay C, Verceletto M, Durand G, Bonneviot G, Gil R, Hedreville M, Belair C, Poitevin R, Devoize J, Wyremblewski P, Delestre F, Setiey A, Comi G, Filippi M, Ghezzi A, Martinelli V, Rossi P, Zaffaroni M, Tola M, Amato M, Fioretti C, Meucci G, Inglese M, Mancardi G, Gambi D, Thomas A, Cavazzuti M, Citterio A, Heltberg A, Hansen H, Fernandez O, Romero F, Arbizu T, Hernandez J, De Andres de Frutos C, Geffner Sclarky D, Aladro Benito Y, Reyes Yanes P, Aguilar M, Burguera J, Yaya R, Bonakim Dib W, Arzua-Mouronte D, d’Hooghe M, Sindic C, Carton H, Medaer R, Roose H, Geens K, Guillaume D, Van Zandycke M, Janssens J, Cornette M, Mol L, Weilbach F, Flachenecker P, Hartung H, Haas J, Tendolkar I, Sindrn E, Kölmel H, Reichel D, Rauch M, Preuss S, Poser S, Mauch E, Strausser-Fuchs S, Kolleger H, Hawkins S, Howell S, Rees J, Thompson A, Johnson M, Boggild M, Gregory R, Bates D, Bone I, Hutchinson M, Polman C, Frequin S, Jongen P, Hommes O, Correia de Sa J, Rio M, Huber S, Lechner-Scott J, Kappos L, Ionescu I, Cornu C, Confavreux C, Vukusic S, El-Etr M, Baulieu E, El-Etr M, Schumacher M, Ionescu I, Confavreux C, Cornu C, Vukusic S, Hartung H, Miller D, Hutchinson M, Pugeat M, d’Archangues C, Conard J, Ménard J, Sitruk-Ware R, Pelissier C, Dat S, Belaïsch-Allard J, Athéa N, Büschsenschutz D, Lyon-Caen O, Gonsette R, Boissel J, Ffrench P, Durand-Dubief F, Cotton F, Pachai C, Bracoud L, Vukusic S, Ionescu I, Androdias G, Marignier R, Chauplannaz G, Laplaud D, Wiertlewski S, Lanctin-Garcia C, Moreau T, Couvreur G, Madinier G, Clavelou P, Taithe F, Aufauvre D, Guy N, Ferrier A, De Sèze J, Collongues N, Debouverie M, Viala F, Brassat D, Gerdelat-Mas A, Henry P, Pelletier J, Rico-Lamy A, Lebrun-Frenay C, Lepage E, Deburghraeve V, Edan G, Castelnovo G, Berger E, Hautecoeur P, Blondiau M, Heinzlef O, Coustans M, Clerc C, Rieu L, Lauxerois M, Hinzelin G, Ouallet J, Minier D, Vion P, Gromaire-Fayolle N, Derache N, Thouvenot E, Sallansonnet-Froment M, Tourniaire P, Toureille L, Borgel F, Stankoff B, Grimaud J, Moroianu C, Guennoc A, Tournier-Gervason C, Peysson S, Trojano M, Patti F, D’Amico E, Motti L, Zaffaroni M, Durelli L, Tavella A. Neuraxial analgesia is not associated with an increased risk of post-partum relapses in MS. Mult Scler 2018; 25:591-600. [DOI: 10.1177/1352458518763080] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Background: Obstetrical analgesia remains a matter of controversy because of the fear of neurotoxicity of local anesthetics on demyelinated fibers or their potential relationship with subsequent relapses. Objective: To assess the impact of neuraxial analgesia on the risk of relapse during the first 3 months post-partum, with a focus on women who experienced relapses during pregnancy. Methods: We analyzed data of women followed-up prospectively during their pregnancies and at least 3 months post-partum, collected in the Pregnancy in Multiple Sclerosis (PRIMS) and Prevention of Post-Partum Relapses with Progestin and Estradiol in Multiple Sclerosis (POPARTMUS) studies between 1992–1995 and 2005–2012, respectively. The association of neuraxial analgesia with the occurrence of a post-partum relapse was estimated by logistic regression analysis. Results: A total of 389 women were included, 215 from PRIMS and 174 from POPARTMUS. In total, 156 women (40%) had neuraxial analgesia. Overall, 24% experienced a relapse during pregnancy and 25% in the 3 months post-partum. Women with a pregnancy relapse were more likely to have a post-partum relapse (odds ratio (OR) = 1.83, p = 0.02), independently of the use of neuraxial analgesia. There was no association between neuraxial analgesia and post-partum relapse (OR = 1.08, p = 0.78). Conclusion: Neuraxial analgesia was not associated with an increased risk of post-partum relapses, whatever multiple sclerosis (MS) activity during pregnancy.
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Affiliation(s)
- Caroline Lavie
- Service de Neurologie A, Hôpital Pierre Wertheimer,
Hospices Civils de Lyon, Lyon, France
| | - Fabien Rollot
- Observatoire Français de la Sclérose en Plaques (OFSEP),
Lyon, France
| | | | - Romain Marignier
- Service de Neurologie A, Hôpital Pierre Wertheimer,
Hospices Civils de Lyon, Lyon, France/Centre de Recherche en Neurosciences de Lyon,
INSERM U1028, CNRS UMR5292, Equipe Neuro-Oncologie et Neuro-Inflammation, Lyon, France;
Université de Lyon 1, Lyon, France
| | - Iuliana Ionescu
- Service de Neurologie A, Hôpital Pierre Wertheimer,
Hospices Civils de Lyon, Lyon, France
| | - Romain Casey
- Observatoire Français de la Sclérose en Plaques (OFSEP),
Lyon, France
| | - Thibault Moreau
- Department of Neurology, EA4184, University Hospital of
Dijon, Dijon, France
| | | | - Michael Hutchinson
- School of Medicine and Medical Science, University College
Dublin, Dublin, Ireland/Department of Neurology, St Vincent’s University Hospital,
Dublin, Ireland
| | - Marie Béatrice D’Hooghe
- National MS Center Melsbroek, Melsbroek, Belgium; Center
for Neurosciences, Vrije Universiteit Brussel (VUB), Brussel, Belgium
| | - David-Axel Laplaud
- Service de Neurologie, CHU de Nantes, CIC015 INSERM,
Nantes, France/INSERM UMR1064, Nantes, France
| | - Pierre Clavelou
- Service de Neurologie, CHU de Clermont-Ferrand,
Clermont-Ferrand, France/INSERM UMR1107, Clermont Université, Université d’Auvergne,
Neuro-Dol, Clermont-Ferrand, France
| | - Jérôme De Sèze
- Department of Neurology, Clinical Investigation Center
INSERM 1434, Hôpitaux Universitaires de Strasbourg, FMTS INSERM 1119, Strasbourg,
France
| | - Marc Debouverie
- EA 4360 APEMAC, University of Lorraine, Nancy,
France/Department of Neurology, Nancy University Hospital, Nancy, France
| | - David Brassat
- Pôle Neurosciences, CHU Toulouse Purpan, Toulouse,
France/INSERM U1043, CNRS UMR 5282, Université Toulouse III, Toulouse, France
| | - Jean Pelletier
- Service de Neurologie, Hôpital de la Timone, Pôle de
Neurosciences Cliniques, AP-HM, Aix-Marseille Université, Marseille, France/CNRS,
Aix-Marseille Université, CRMBM UMR7339, Marseille, France
| | | | - Emmanuelle Le Page
- Clinical Neuroscience Centre, CIC-P 1414 INSERM, Rennes
University Hospital, Rennes, France
| | | | - Eric Berger
- Department of Neurology, CHU Besançon, Besançon,
France
| | - Patrick Hautecoeur
- Service de Neurologie, Groupement des Hôpitaux de
l’Institut Catholique de Lille, Lille, France
| | - Olivier Heinzlef
- Department of Neurology, Hôpital CHI de
Poissy/Saint-Germain-en-Laye, Paris, France
| | - Luca Durelli
- Division of Neurology, Department of Clinical and
Biological Sciences, University of Torino, San Luigi Gonzaga University Hospital,
Orbassano, Italy
| | - Marinella Clerico
- Division of Neurology, Department of Clinical and
Biological Sciences, University of Torino, San Luigi Gonzaga University Hospital,
Orbassano, Italy
| | - Maria Trojano
- Department of Basic Medical Sciences, Neuroscience and
Sense Organs, University of Bari Aldo Moro, Bari, Italy
| | - Francesco Patti
- Department of Medical and Surgical Sciences, and Advanced
Technologies, G.F. Ingrassia, Multiple Sclerosis Center, University of Catania, Catania,
Italy
| | - Sandra Vukusic
- Service de Neurologie A, Hôpital Pierre Wertheimer,
Hospices Civils de Lyon, Lyon, France/Observatoire Français de la Sclérose en Plaques
(OFSEP), Lyon, France/Centre de Recherche en Neurosciences de Lyon, INSERM U1028, CNRS
UMR5292, Equipe Neuro-Oncologie et Neuro-Inflammation, Lyon, France/Université de Lyon
1, Lyon, France
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Simkin D, Robin G, Giuliano S, Vukolic A, Moceri P, Guy N, Wagner KD, Lacampagne A, Allard B, Bendahhou S. Andersen's syndrome mutants produce a knockdown of inwardly rectifying K + channel in mouse skeletal muscle in vivo. Cell Tissue Res 2017; 371:309-323. [PMID: 29018970 DOI: 10.1007/s00441-017-2696-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 05/03/2017] [Accepted: 09/05/2017] [Indexed: 11/30/2022]
Abstract
Andersen's syndrome (AS) is a rare autosomal disorder that has been defined by the triad of periodic paralysis, cardiac arrhythmia, and developmental anomalies. AS has been directly linked to over 40 different autosomal dominant negative loss-of-function mutations in the KCNJ2 gene, encoding for the tetrameric strong inward rectifying K+ channel KIR2.1. While KIR2.1 channels have been suggested to contribute to setting the resting membrane potential (RMP) and to control the duration of the action potential (AP) in skeletal and cardiac muscle, the mechanism by which AS mutations produce such complex pathophysiological symptoms is poorly understood. Thus, we use an adenoviral transduction strategy to study in vivo subcellular distribution of wild-type (WT) and AS-associated mutant KIR2.1 channels in mouse skeletal muscle. We determined that WT and D71V AS mutant KIR2.1 channels are localized to the sarcolemma and the transverse tubules (T-tubules) of skeletal muscle fibers, while the ∆314-315 AS KIR2.1 mutation prevents proper trafficking of the homo- or hetero-meric channel complexes. Whole-cell voltage-clamp recordings in individual skeletal muscle fibers confirmed the reduction of inwardly rectifying K+ current (IK1) after transduction with ∆314-315 KIR2.1 as compared to WT channels. Analysis of skeletal muscle function revealed reduced force generation during isometric contraction as well as reduced resistance to muscle fatigue in extensor digitorum longus muscles transduced with AS mutant KIR2.1. Together, these results suggest that KIR2.1 channels may be involved in the excitation-contraction coupling process required for proper skeletal muscle function. Our findings provide clues to mechanisms associated with periodic paralysis in AS.
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Affiliation(s)
- Dina Simkin
- UMR 7370 CNRS, LP2M, Laboratoire d'Excellence - ICST, Université Côte d'Azur, Faculté de Médecine, 06107, Nice, France.,Department of Pharmacology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Gaëlle Robin
- UMR CNRS 5534, Université Claude Bernard Lyon 1, 69622, Lyon, France
| | - Serena Giuliano
- UMR 7370 CNRS, LP2M, Laboratoire d'Excellence - ICST, Université Côte d'Azur, Faculté de Médecine, 06107, Nice, France
| | - Ana Vukolic
- Institute for Molecular Health Science, ETH Zurich, 8093, Zurich, Switzerland
| | - Pamela Moceri
- UMR 7370 CNRS, LP2M, Laboratoire d'Excellence - ICST, Université Côte d'Azur, Faculté de Médecine, 06107, Nice, France.,Service de Cardiologie, Pasteur Hospital, CHU de Nice, 06107, Nice, France
| | - Nicolas Guy
- UMR 7275 CNRS, IPMC, Université Côte d'Azur, 06560, Valbonne, France
| | - Kay-Dietrich Wagner
- UMR 7284 CNRS, INSERM, IBV, Université Côte d'Azur, Faculté de Médecine, 06107, Nice, France
| | - Alain Lacampagne
- INSERM U1046, UMR CNRS 9214, Université de Montpellier, CHRU de Montpellier, 34295, Montpellier, France
| | - Bruno Allard
- UMR CNRS 5534, Université Claude Bernard Lyon 1, 69622, Lyon, France
| | - Saïd Bendahhou
- UMR 7370 CNRS, LP2M, Laboratoire d'Excellence - ICST, Université Côte d'Azur, Faculté de Médecine, 06107, Nice, France.
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Marin B, Beghi E, Vial C, Bernard E, Lautrette G, Clavelou P, Guy N, Lemasson G, Debruxelles S, Cintas P, Antoine JC, Camdessanche JP, Logroscino G, Preux PM, Couratier P. Evaluation of the application of the European guidelines for the diagnosis and clinical care of amyotrophic lateral sclerosis (ALS) patients in six French ALS centres. Eur J Neurol 2016; 23:787-95. [DOI: 10.1111/ene.12941] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Accepted: 11/13/2015] [Indexed: 11/28/2022]
Affiliation(s)
- B. Marin
- INSERM, U1094; Tropical Neuroepidemiology; Limoges France
- Univ. Limoges; UMR_S 1094; Tropical Neuroepidemiology; Institute of Neuroepidemiology and Tropical Neurology; CNRS FR 3503 GEIST; F-87000 Limoges France
- CHU Limoges; Centre d'Epidémiologie de Biostatistique et de Méthodologie de la Recherche; Limoges France
| | - E. Beghi
- Laboratorio di Malattie Neurologiche; Dipartimento di Neuroscienze; IRCCS Istituto di Ricerche Farmacologiche Mario Negri; Milano Italy
| | - C. Vial
- CHU Lyon Hôpital Neurologique P. Wertheimer; Electromyographie et pathologies neuromusculaires; Lyon France
| | - E. Bernard
- CHU Lyon Hôpital Neurologique P. Wertheimer; Electromyographie et pathologies neuromusculaires; Lyon France
| | - G. Lautrette
- CHU Limoges; Service de Neurologie; Centre Expert SLA; Limoges France
| | - P. Clavelou
- CHU Clermont-Ferrand; Hopital Gabriel Montpied; Service de Neurologie; Centre Expert SLA; Clermont-Ferrand France
| | - N. Guy
- CHU Clermont-Ferrand; Hopital Gabriel Montpied; Service de Neurologie; Centre Expert SLA; Clermont-Ferrand France
| | - G. Lemasson
- CHU Pellegrin; Service de Neurologie; Centre Expert SLA; Bordeaux France
| | - S. Debruxelles
- CHU Pellegrin; Service de Neurologie; Centre Expert SLA; Bordeaux France
| | - P. Cintas
- CHU Toulouse Purpan; Centre Expert SLA; Unité de neurophysiologie clinique; Toulouse France
| | - J. C. Antoine
- CHU Saint-Étienne; Hôpital Nord; Service de Neurologie; Centre Expert SLA; Saint-Étienne France
| | - J. P. Camdessanche
- CHU Saint-Étienne; Hôpital Nord; Service de Neurologie; Centre Expert SLA; Saint-Étienne France
| | - G. Logroscino
- Department of Basic Medical Sciences; Neuroscience and Sense Organs; University of Bari ‘Aldo Moro’; Bari Italy
- Unit of Neurodegenerative Diseases; Department of Clinical Research in Neurology; University of Bari ‘Aldo Moro’; at Pia Fondazione Cardinale G. Panico; Tricase Lecce Italy
| | - P. M. Preux
- INSERM, U1094; Tropical Neuroepidemiology; Limoges France
- Univ. Limoges; UMR_S 1094; Tropical Neuroepidemiology; Institute of Neuroepidemiology and Tropical Neurology; CNRS FR 3503 GEIST; F-87000 Limoges France
- CHU Limoges; Centre d'Epidémiologie de Biostatistique et de Méthodologie de la Recherche; Limoges France
| | - P. Couratier
- INSERM, U1094; Tropical Neuroepidemiology; Limoges France
- Univ. Limoges; UMR_S 1094; Tropical Neuroepidemiology; Institute of Neuroepidemiology and Tropical Neurology; CNRS FR 3503 GEIST; F-87000 Limoges France
- CHU Limoges; Service de Neurologie; Centre Expert SLA; Limoges France
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Vigàno A, Bogdanov VB, Noirhomme Q, Guy N, Dallel R, Laureys S, Phillips C, Schoenen J. Mechanisms of individual differences in heterotopic noxious analgesia (DNIC), an fMRI study. J Headache Pain 2013. [PMCID: PMC3620377 DOI: 10.1186/1129-2377-14-s1-p94] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Vigàno A, Bogdanov VB, Noirhomme Q, Guy N, Dallel R, Laureys S, Phillips C, Schoenen J. Mechanisms of individual differences in heterotopic noxious analgesia (DNIC), an fMRI study. J Headache Pain 2013. [DOI: 10.1186/1129-2377-1-s1-p94] [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: 11/10/2022] Open
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Moisset X, Vitello N, Cornut-Chauvinc C, Taithe F, Dionet E, Lauxerois M, Guy N, Clavelou P. [Unilateral Creutzfeld-Jakob disease: report of a probable case on electroclinical, MRI and biological criteria]. Rev Neurol (Paris) 2012; 169:162-5. [PMID: 23079855 DOI: 10.1016/j.neurol.2012.07.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 07/01/2012] [Accepted: 07/23/2012] [Indexed: 11/28/2022]
Abstract
We report the case of a 70-year-old man who developed probable unilateral Creutzfeldt-Jakob disease. Clinically, he presented with right hemiparesis, progressive aphasia, temporospatial disorientation and cerebellar ataxia and later on, myoclonia. The MRI showed a hypersignal from the left caudate in DWI with decreased ADC. Repeated electroencephalograms showed a slow background rhythm in the left hemisphere with superimposed periodic, biphasic and triphasic sharp-wave complexes in the left temporal region. Death occurred after 5weeks. Although exceptional, unilateral Creutzfeldt-Jakob disease was retained as possible.
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Affiliation(s)
- X Moisset
- Service de neurologie, Clermont université, université d'Auvergne, CHU Gabriel-Montpied, place Henri-Dunant, 63000 Clermont-Ferrand, France.
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El Wakil A, Bandulik S, Guy N, Bendahhou S, Zennaro MC, Niehrs C, Mari B, Warth R, Barhanin J, Lalli E. Dkk3 is a component of the genetic circuitry regulating aldosterone biosynthesis in the adrenal cortex. Hum Mol Genet 2012; 21:4922-9. [DOI: 10.1093/hmg/dds333] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Justo D, Guy N, Halperin E, Lerman Y. Admission Norton scale scores are associated with long-term mortality following rehabilitation in older adults. J Rehabil Med 2012; 44:172-5. [DOI: 10.2340/16501977-0923] [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: 11/16/2022] Open
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Millecamps S, Salachas F, Cazeneuve C, Gordon P, Bricka B, Camuzat A, Guillot-Noel L, Russaouen O, Bruneteau G, Pradat PF, Le Forestier N, Vandenberghe N, Danel-Brunaud V, Guy N, Thauvin-Robinet C, Lacomblez L, Couratier P, Hannequin D, Seilhean D, Le Ber I, Corcia P, Camu W, Brice A, Rouleau G, LeGuern E, Meininger V. SOD1, ANG, VAPB, TARDBP, and FUS mutations in familial amyotrophic lateral sclerosis: genotype-phenotype correlations. J Med Genet 2010; 47:554-60. [DOI: 10.1136/jmg.2010.077180] [Citation(s) in RCA: 216] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Pradat PF, Attarian S, Camdessanché JP, Carluer L, Cintas P, Corcia P, Echaniz-Laguna A, Gonzalez-Bermejo J, Guy N, Nicolas G, Perez T, Soriani MH, Vandenberghe N, Verschueren A. [Research in amyotrophic lateral sclerosis: what is new in 2009?]. Rev Neurol (Paris) 2010; 166:683-98. [PMID: 20472259 DOI: 10.1016/j.neurol.2010.03.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2010] [Accepted: 03/03/2010] [Indexed: 12/12/2022]
Abstract
This paper, written by French amyotrophic lateral sclerosis (ALS) center experts, presents an update of recent advances in fundamental, epidemiological and clinical research in ALS based on a review of the literature between September 2008 and November 2009. Among other pathophysiological mechanisms, the role of stress of the endoplasmic reticulum and the importance of energetic metabolic disturbances have been underscored. In the field of genetics, research has been advanced through the identification of mutations of the gene FUsed in Sarcoma/Translated in LipoSarcoma (FUS/TLS) in individuals with familial and sporadic ALS. This gene is involved in the regulation of transcription, splicing and RNA transport, and has functional homology to another ALS gene, TARDBP, which suggests that a common mechanism may underlie motor neuron degeneration. A report showed that mice expressing a mutant form of human TDP-43 develop a progressive and fatal neurodegenerative disease reminiscent of both ALS and frontotemporal lobar degeneration with ubiquitin aggregates (FTLD-U), providing a new animal model that may help to better understand the pathophysiology and test new therapeutics. Beside genetic studies, several epidemiologic studies have investigated the role of environmental factors. A recent study suggests that smoking is a risk factor for developing ALS and it is hypothesized that this could occur through lipid peroxidation via formaldehyde exposure. From a neuroprotective perspective, trials with IGF-1, sodium valproate, coenzyme Q or glatiramer acetate have failed to demonstrate any beneficial effect. A study published in 2008 argued that lithium may have a neuroprotective effect in ALS mice and also in patients. However, two preclinical studies failed to replicate the neuroprotective effect of lithium in ALS mice. Therapeutic trials have been performed or are currently ongoing in Europe and North America. Their results have not yet been published.
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Affiliation(s)
- P-F Pradat
- CHU Pitié-Salpêtrière, AP-HP, Paris cedex 13, France.
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13
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Simkin D, Guy N, Brau F, Barhanin J, Lacampagne A, Bendahhou S. Exploring the Inwardly Rectifying Potassium Channel Kir2.1 and Andersen’s Syndrome in the Skeletal Muscle. Biophys J 2010. [DOI: 10.1016/j.bpj.2009.12.3835] [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: 10/19/2022] Open
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14
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Guy N, Marques AR, Orliaguet T, Lanteri-Minet M, Dallel R, Clavelou P. Are there differences between cephalic and extracephalic cutaneous allodynia in migraine patients? Cephalalgia 2009; 30:881-6. [DOI: 10.1111/j.1468-2982.2009.02008.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Cutaneous allodynia (CA), pain in response to innocuous cutaneous stimuli, is recognized as a sign of central sensitization during migraine episodes. It is either restricted within the pain area on the ipsilateral head, or extends within and outside the head. Moreover, CA can be elicited in response to thermal (heat or cold) and/or mechanical stimuli. This raises the question as to whether cephalic and extracephalic CAs share the same properties. We assessed cephalic and extracephalic CAs in migraine episodic patients using a questionnaire completed at home during migraine attacks. A total of 67 episodic migraine patients (58 women, nine men; 40 ± 13 years old) addressed all questions in the questionnaire. Forty-nine patients (73%) cited one or more allodynic symptoms during or immediately after the migraine attack. Almost all 49 patients reported cephalic CA, whereas 24 (49%) also reported extracephalic CA. Occurrence and extension of CA correlated ( P = 0.005) with headache intensity. Modalities of cephalic and extracephalic CA were different (χ2 = 12.03; P = 0.002), extracephalic CA being mostly thermal (75%) whereas cephalic CA was mostly mechanical (92%). This suggests that cephalic and extracephalic CAs involve different mechanisms.
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Affiliation(s)
- N Guy
- Inserm, U929, Clermont-Ferrand, F-63000 France
- Université Clermont1, Clermont-Ferrand, F-63000 France
- CHU Clermont-Ferrand, Clermont-Ferrand, F-63000, France
| | - AR Marques
- Inserm, U929, Clermont-Ferrand, F-63000 France
- Université Clermont1, Clermont-Ferrand, F-63000 France
- CHU Clermont-Ferrand, Clermont-Ferrand, F-63000, France
| | - T Orliaguet
- Inserm, U929, Clermont-Ferrand, F-63000 France
- Université Clermont1, Clermont-Ferrand, F-63000 France
- CHU Clermont-Ferrand, Clermont-Ferrand, F-63000, France
| | - M Lanteri-Minet
- Inserm, U929, Clermont-Ferrand, F-63000 France
- CHU Nice, Nice, F-06002, France
| | - R Dallel
- Inserm, U929, Clermont-Ferrand, F-63000 France
- Université Clermont1, Clermont-Ferrand, F-63000 France
- CHU Clermont-Ferrand, Clermont-Ferrand, F-63000, France
| | - P Clavelou
- Inserm, U929, Clermont-Ferrand, F-63000 France
- Université Clermont1, Clermont-Ferrand, F-63000 France
- CHU Clermont-Ferrand, Clermont-Ferrand, F-63000, France
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15
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Noël J, Zimmermann K, Busserolles J, Deval E, Alloui A, Diochot S, Guy N, Borsotto M, Reeh P, Eschalier A, Lazdunski M. The mechano-activated K+ channels TRAAK and TREK-1 control both warm and cold perception. EMBO J 2009; 28:1308-18. [PMID: 19279663 DOI: 10.1038/emboj.2009.57] [Citation(s) in RCA: 269] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2008] [Accepted: 02/11/2009] [Indexed: 11/09/2022] Open
Abstract
The sensation of cold or heat depends on the activation of specific nerve endings in the skin. This involves heat- and cold-sensitive excitatory transient receptor potential (TRP) channels. However, we show here that the mechano-gated and highly temperature-sensitive potassium channels of the TREK/TRAAK family, which normally work as silencers of the excitatory channels, are also implicated. They are important for the definition of temperature thresholds and temperature ranges in which excitation of nociceptor takes place and for the intensity of excitation when it occurs. They are expressed with thermo-TRP channels in sensory neurons. TRAAK and TREK-1 channels control pain produced by mechanical stimulation and both heat and cold pain perception in mice. Expression of TRAAK alone or in association with TREK-1 controls heat responses of both capsaicin-sensitive and capsaicin-insensitive sensory neurons. Together TREK-1 and TRAAK channels are important regulators of nociceptor activation by cold, particularly in the nociceptor population that is not activated by menthol.
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Affiliation(s)
- Jacques Noël
- Université de Nice-Sophia Antipolis, CNRS UMR6097, Institut de Pharmacologie Moléculaire et Cellulaire, Institut Paul Hamel, Sophia Antipolis, Valbonne, France.
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16
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Meininger V, Antoine JC, Arne-Bes M, Broussolle E, Bruneteau G, Camdessanche J, Camu W, Carluer L, Cintas P, Clavelou P, Corcia P, Couratier P, Danel-Brunaud V, Desnuelle C, Destée A, Dib M, Fleury MC, Furby A, Giroud M, Gonzales J, Guy N, Kolev I, Lacomblez L, Lardillier-Noel D, Le Forestier N, Maugin D, Nicolas G, Pittion S, Pouget J, Pradat P, Rousso E, Salachas F, Soriani M, Tranchant C, Vandenberghe N, Verschueren A, Viader F, Vial C. Les méfaits d’Internet dans les traitements de la sclérose latérale amyotrophique. Rev Neurol (Paris) 2009; 165:207-10. [DOI: 10.1016/j.neurol.2009.01.003] [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: 11/26/2022]
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17
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Seyedi D, Ducellier A, Foerster E, Guy N, Hild F, Rohmer J. Coupled hydromechanical modeling to study the integrity and safety of geological storage of CO2. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.egypro.2009.02.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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18
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Gil J, Funalot B, Verschueren A, Danel-Brunaud V, Camu W, Vandenberghe N, Desnuelle C, Guy N, Camdessanche JP, Cintas P, Carluer L, Pittion S, Nicolas G, Corcia P, Fleury MC, Maugras C, Besson G, Le Masson G, Couratier P. Causes of death amongst French patients with amyotrophic lateral sclerosis: a prospective study. Eur J Neurol 2009; 15:1245-51. [PMID: 18973614 DOI: 10.1111/j.1468-1331.2008.02307.x] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND PURPOSE To prospectively investigate causes of death and the circumstances surrounding death in 302 patients with amyotrophic lateral sclerosis (ALS). The functional status of patients immediately before death was also determined. METHODS Information was obtained from neurologists at ALS centres, patients' files, and, when deaths occurred outside a medical facility, attending physicians. RESULTS Most patients (63%) died in a medical facility. The most frequently reported cause of death was respiratory failure (77%), including terminal respiratory insufficiency (58%), pneumonia (14%), asphyxia due to a foreign body (3%) and pulmonary embolism (2%). Ten per cent of patients died from other causes: post-surgical or traumatic conditions (5%), cardiac causes (3.4%), suicide (1.3%) and sudden death of unknown origin (0.7%). The cause of death could not be determined in 13% of cases (6% inside a medical facility and 25% outside). At the time of death, only 55% of patients were receiving riluzole, 33% were undergoing non-invasive ventilation, 3% had a tracheotomy and 37% a gastrostomy. CONCLUSION The information provided by this study helps to improve our understanding of the natural history of the disease and may help optimize the quality of care we can offer patients at the end of life.
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Affiliation(s)
- J Gil
- EA 3174 Faculté de Médecine, Limoges, France
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Clavelou P, Bouteloup C, Desport JC, Ouchachne L, Guy N, Besson G, Couratier P. Effets de la gastrostomie sur la survie et la qualité de vie des patients atteints de sclérose latérale amyotrophique (SLA). Rev Neurol (Paris) 2009. [DOI: 10.1016/s0035-3787(09)70011-6] [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: 11/30/2022]
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20
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Affiliation(s)
- C Chapuis
- Pharmacie centrale, Centre Hospitalier Universitaire, Grenoble, France.
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Johnston SD, Camacho FC, Carrillo L, Guy N, Govea J, Martinez O, Parãs A, Lisle AT, D'Occhio M. The development of a testosterone stimulation test in the Virginia opossum (Didelphis virginiana) and its use in evaluating deslorelin contraception. Reprod Fertil Dev 2008; 20:563-9. [PMID: 18577353 DOI: 10.1071/rd07215] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2007] [Accepted: 03/04/2008] [Indexed: 11/23/2022] Open
Abstract
The aims of the present study were to examine the variability of testosterone secretion in the Virginia Opossum over a 24 h period and to develop a testosterone stimulation test that would provide an index of the prevailing testosterone biosynthetic capacity of the testes; the latter was used to clinically evaluate the efficacy of a gonadotrophin-releasing hormone agonist contraceptive. Sexually-mature captive opossums (n = 12) located in Africam Safari (Mexico) sampled every 12 h over 24 h consistently showed basal (<0.21 ng mL(-1)) blood testosterone concentrations. Intra-muscular injection of buserelin (2 microg mL(-1)) and human chorionic gonadotrophin (hCG; 1000 IU) resulted in an increase (P < 0.05) of plasma testosterone concentrations with maximal concentrations (3.9 ng mL(-1) and 5.8 ng mL(-1) respectively) occurring 120 min after injection. Plasma testosterone declined relatively rapidly to basal concentrations after 240 min with hCG but remained elevated after the same period of time with buserelin. Male opossums treated with (n = 6) and without (n = 6) a controlled-release deslorelin implant (Suprelorin; 4.7 mg deslorelin) were evaluated over a 10-week period for changes in testosterone secretion (hCG stimulation test) and sperm production (spermatorrhea). At the end of this period, the animals were hemi-castrated and their relative testicular quantitative histology compared. Testosterone concentration decreased over the course of the study in both treated and control animals (P < 0.0001) but there was no apparent effect of deslorelin on testosterone secretion, testicular histology (relative proportions of testicular cell types and seminiferous tubule diameter), or sperm production (presence of sperm in the cauda epididymis or urine).
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Affiliation(s)
- S D Johnston
- School of Animal Studies, The University of Queensland, Gatton, Queensland 4343, Australia.
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22
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Heitzmann D, Derand R, Jungbauer S, Bandulik S, Sterner C, Schweda F, El Wakil A, Lalli E, Guy N, Mengual R, Reichold M, Tegtmeier I, Bendahhou S, Gomez-Sanchez CE, Aller MI, Wisden W, Weber A, Lesage F, Warth R, Barhanin J. Invalidation of TASK1 potassium channels disrupts adrenal gland zonation and mineralocorticoid homeostasis. EMBO J 2007; 27:179-87. [PMID: 18034154 DOI: 10.1038/sj.emboj.7601934] [Citation(s) in RCA: 153] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2007] [Accepted: 11/02/2007] [Indexed: 01/18/2023] Open
Abstract
TASK1 (KCNK3) and TASK3 (KCNK9) are two-pore domain potassium channels highly expressed in adrenal glands. TASK1/TASK3 heterodimers are believed to contribute to the background conductance whose inhibition by angiotensin II stimulates aldosterone secretion. We used task1-/- mice to analyze the role of this channel in adrenal gland function. Task1-/- exhibited severe hyperaldosteronism independent of salt intake, hypokalemia, and arterial 'low-renin' hypertension. The hyperaldosteronism was fully remediable by glucocorticoids. The aldosterone phenotype was caused by an adrenocortical zonation defect. Aldosterone synthase was absent in the outer cortex normally corresponding to the zona glomerulosa, but abundant in the reticulo-fasciculata zone. The impaired mineralocorticoid homeostasis and zonation were independent of the sex in young mice, but were restricted to females in adults. Patch-clamp experiments on adrenal cells suggest that task3 and other K+ channels compensate for the task1 absence. Adrenal zonation appears as a dynamic process that even can take place in adulthood. The striking changes in the adrenocortical architecture in task1-/- mice are the first demonstration of the causative role of a potassium channel in development/differentiation.
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Affiliation(s)
- Dirk Heitzmann
- Institute of Physiology, University of Regensburg, Regensburg, Germany
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23
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Westphalen RI, Krivitski M, Amarosa A, Guy N, Hemmings HC. Reduced inhibition of cortical glutamate and GABA release by halothane in mice lacking the K+ channel, TREK-1. Br J Pharmacol 2007; 152:939-45. [PMID: 17828284 PMCID: PMC2078222 DOI: 10.1038/sj.bjp.0707450] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND AND PURPOSE Deletion of TREK-1, a two-pore domain K(+) channel (K(2P)) activated by volatile anaesthetics, reduces volatile anaesthetic potency in mice, consistent with a role for TREK-1 as an anaesthetic target. We used TREK-1 knockout mice to examine the presynaptic function of TREK-1 in transmitter release and its role in the selective inhibition of glutamate vs GABA release by volatile anaesthetics. EXPERIMENTAL APPROACH The effects of halothane on 4-aminopyridine-evoked and basal [(3)H]glutamate and [(14)C]GABA release from cerebrocortical nerve terminals isolated from TREK-1 knockout (KO) and littermate wild-type (WT) mice were compared. TREK-1 was quantified by immunoblotting of nerve terminal preparations. KEY RESULTS Deletion of TREK-1 significantly reduced the potency of halothane inhibition of 4-aminopyridine-evoked release of both glutamate and GABA without affecting control evoked release or the selective inhibition of glutamate vs GABA release. TREK-1 deletion also reduced halothane inhibition of basal glutamate release, but did not affect basal GABA release. CONCLUSIONS AND IMPLICATIONS The reduced sensitivity of glutamate and GABA release to inhibition by halothane in TREK-1 KO nerve terminals correlates with the reduced anaesthetic potency of halothane in TREK-1 KO mice observed in vivo. A presynaptic role for TREK-1 was supported by the enrichment of TREK-1 in isolated nerve terminals determined by immunoblotting. This study represents the first evidence for a link between an anaesthetic-sensitive 2-pore domain K(+) channel and presynaptic function, and provides further support for presynaptic mechanisms in determining volatile anaesthetic action.
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Affiliation(s)
- R I Westphalen
- Departments of Anesthesiology and Pharmacology, Weill Cornell Medical College New York, NY, USA
| | - M Krivitski
- Departments of Anesthesiology and Pharmacology, Weill Cornell Medical College New York, NY, USA
| | - A Amarosa
- Departments of Anesthesiology and Pharmacology, Weill Cornell Medical College New York, NY, USA
| | - N Guy
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UMR 6097, Université de Nice Sophia-Antipolis Sophia Antipolis, 06560 Valbonne, France
| | - H C Hemmings
- Departments of Anesthesiology and Pharmacology, Weill Cornell Medical College New York, NY, USA
- Author for correspondence:
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24
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Guy N. [Lyme disease: basis for treatment strategy, primary preventive care and secondary preventive care]. Med Mal Infect 2007; 37:381-93. [PMID: 17408897 DOI: 10.1016/j.medmal.2006.01.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2006] [Accepted: 01/15/2006] [Indexed: 10/23/2022]
Abstract
Lyme disease is the most common tick borne disease and is caused by Borrelia burgdorferi sensu lato. Ticks of the genus Ixodes are the vectors that transmit the infection to host mammals in endemic foci. Ixodes is infected by Borrelia at larval stage when it feeds on infected mammals. Man is an occasional host. The infection risk is linked to interaction between human and the natural environment. Strategies for prevention are closely related to the enzootic cycle of the Ixodes tick. Environmental measures to reduced tick density or host mammals are expensive, need to be repeated annually and cannot be applied to large areas. The primary prevention could be reduced to personal preventive measures such as reducing the amount of exposed skin and frequent checking for ticks. The risk of Lyme disease transmission after a tick bite is relatively low, and remains under 4%. The transmission rate depends on the duration of feeding. A rapide tick removal with fine tweezers or preferably special forceps and disinfection of the bite site appear to be the best technique. The absence of scientific evidence, and the risk of adverse events does not lead to recommending antimicrobial prophylaxis. Follow-up and educating the patients on the disease, clinical manifestation, and later primary prevention should be undertaken.
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Affiliation(s)
- N Guy
- Service de neurologie, CHU de Clermont-Ferrand, BP 69, 63003 Clermont-Ferrand cedex 01, France.
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25
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Garry A, Fromy B, Blondeau N, Henrion D, Brau F, Gounon P, Guy N, Heurteaux C, Lazdunski M, Saumet JL. Altered acetylcholine, bradykinin and cutaneous pressure-induced vasodilation in mice lacking the TREK1 potassium channel: the endothelial link. EMBO Rep 2007; 8:354-9. [PMID: 17347672 PMCID: PMC1852759 DOI: 10.1038/sj.embor.7400916] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2006] [Revised: 12/14/2006] [Accepted: 01/11/2007] [Indexed: 11/08/2022] Open
Abstract
The TWIK related K+ channel TREK1 is an important member of the class of two-pore-domain K+ channels. It is a background K+ channel and is regulated by hormones, neurotransmitters, intracellular pH and mechanical stretch. This work shows that TREK1 is present both in mesenteric resistance arteries and in skin microvessels. It is particularly well expressed in endothelial cells. Deletion of TREK1 in mice leads to an important alteration in vasodilation of mesenteric arteries induced by acetylcholine and bradykinin. Iontophoretic delivery of acetylcholine and bradykinin in the skin of TREK1+/+ and TREK1-/- mice also shows the important role of TREK1 in cutaneous endothelium-dependent vasodilation. The vasodilator response to local pressure application is also markedly decreased in TREK1-/- mice, mimicking the decreased response to pressure observed in diabetes. Deletion of TREK1 is associated with a marked alteration in the efficacy of the G-protein-coupled receptor-associated cascade producing NO that leads to major endothelial dysfunction.
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Affiliation(s)
- Ambroise Garry
- Biologie Neuro-vasculaire Intégrée, UMR CNRS 6214—INSERM 771, Faculté de Médecine Angers, 49045 Angers, France
| | - Bérengère Fromy
- Biologie Neuro-vasculaire Intégrée, UMR CNRS 6214—INSERM 771, Faculté de Médecine Angers, 49045 Angers, France
| | - Nicolas Blondeau
- Institut de Pharmacologie Moléculaire et Cellulaire, UMR CNRS, Institut Paul Hamel, Université de Nice-Sophia Antipolis, 660, Route des Lucioles, Sophia Antipolis, 06560 Valbonne, France
| | - Daniel Henrion
- Biologie Neuro-vasculaire Intégrée, UMR CNRS 6214—INSERM 771, Faculté de Médecine Angers, 49045 Angers, France
| | - Frédéric Brau
- Institut de Pharmacologie Moléculaire et Cellulaire, UMR CNRS, Institut Paul Hamel, Université de Nice-Sophia Antipolis, 660, Route des Lucioles, Sophia Antipolis, 06560 Valbonne, France
| | - Pierre Gounon
- Centre Commun de Microscopie Appliquée, Université de Nice-Sophia Antipolis, 28 avenue de Valrose, 06108 Nice Cedex 2, France
| | - Nicolas Guy
- Institut de Pharmacologie Moléculaire et Cellulaire, UMR CNRS, Institut Paul Hamel, Université de Nice-Sophia Antipolis, 660, Route des Lucioles, Sophia Antipolis, 06560 Valbonne, France
| | - Catherine Heurteaux
- Institut de Pharmacologie Moléculaire et Cellulaire, UMR CNRS, Institut Paul Hamel, Université de Nice-Sophia Antipolis, 660, Route des Lucioles, Sophia Antipolis, 06560 Valbonne, France
| | - Michel Lazdunski
- Institut de Pharmacologie Moléculaire et Cellulaire, UMR CNRS, Institut Paul Hamel, Université de Nice-Sophia Antipolis, 660, Route des Lucioles, Sophia Antipolis, 06560 Valbonne, France
- Tel: +33 493 957701; Fax: +33 493 957704; E-mail:
| | - Jean Louis Saumet
- Biologie Neuro-vasculaire Intégrée, UMR CNRS 6214—INSERM 771, Faculté de Médecine Angers, 49045 Angers, France
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26
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Sandoz G, Thümmler S, Duprat F, Feliciangeli S, Vinh J, Escoubas P, Guy N, Lazdunski M, Lesage F. AKAP150, a switch to convert mechano-, pH- and arachidonic acid-sensitive TREK K(+) channels into open leak channels. EMBO J 2006; 25:5864-72. [PMID: 17110924 PMCID: PMC1698884 DOI: 10.1038/sj.emboj.7601437] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2006] [Accepted: 10/16/2006] [Indexed: 11/09/2022] Open
Abstract
TREK channels are unique among two-pore-domain K(+) channels. They are activated by polyunsaturated fatty acids (PUFAs) including arachidonic acid (AA), phospholipids, mechanical stretch and intracellular acidification. They are inhibited by neurotransmitters and hormones. TREK-1 knockout mice have impaired PUFA-mediated neuroprotection to ischemia, reduced sensitivity to volatile anesthetics and altered perception of pain. Here, we show that the A-kinase-anchoring protein AKAP150 is a constituent of native TREK-1 channels. Its binding to a key regulatory domain of TREK-1 transforms low-activity outwardly rectifying currents into robust leak conductances insensitive to AA, stretch and acidification. Inhibition of the TREK-1/AKAP150 complex by Gs-coupled receptors such as serotonin 5HT4sR and noradrenaline beta2AR is as extensive as for TREK-1 alone, but is faster. Inhibition of TREK-1/AKAP150 by Gq-coupled receptors such as serotonin 5HT2bR and glutamate mGluR5 is much reduced when compared to TREK-1 alone. The association of AKAP150 with TREK channels integrates them into a postsynaptic scaffold where both G-protein-coupled membrane receptors (as demonstrated here for beta2AR) and TREK-1 dock simultaneously.
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MESH Headings
- Adaptor Proteins, Signal Transducing/analysis
- Adaptor Proteins, Signal Transducing/metabolism
- Amino Acid Sequence
- Animals
- Arachidonic Acid/metabolism
- COS Cells
- Chlorocebus aethiops
- Dogs
- GTP-Binding Protein alpha Subunits, Gq-G11/metabolism
- Hydrogen-Ion Concentration
- Mice
- Mice, Inbred C57BL
- Molecular Sequence Data
- Oocytes
- Potassium Channels, Tandem Pore Domain/chemistry
- Potassium Channels, Tandem Pore Domain/metabolism
- Protein Binding
- Protein Structure, Tertiary
- Proteomics
- Receptors, Adrenergic, beta-2/metabolism
- Receptors, Cell Surface/metabolism
- Up-Regulation/genetics
- Xenopus
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Affiliation(s)
- Guillaume Sandoz
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UMR6097, Institut Paul Hamel, Valbonne, France
| | - Susanne Thümmler
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UMR6097, Institut Paul Hamel, Valbonne, France
| | - Fabrice Duprat
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UMR6097, Institut Paul Hamel, Valbonne, France
| | - Sylvain Feliciangeli
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UMR6097, Institut Paul Hamel, Valbonne, France
| | | | - Pierre Escoubas
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UMR6097, Institut Paul Hamel, Valbonne, France
| | - Nicolas Guy
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UMR6097, Institut Paul Hamel, Valbonne, France
| | - Michel Lazdunski
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UMR6097, Institut Paul Hamel, Valbonne, France
| | - Florian Lesage
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UMR6097, Institut Paul Hamel, Valbonne, France
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UMR6097, Institut Paul Hamel, 660, route des lucioles, 06560 Valbonne, France. Tel.: +33 4 93 95 77 32; Fax: +33 4 93 95 77 32; E-mail:
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27
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Heurteaux C, Lucas G, Guy N, El Yacoubi M, Thümmler S, Peng XD, Noble F, Blondeau N, Widmann C, Borsotto M, Gobbi G, Vaugeois JM, Debonnel G, Lazdunski M. Deletion of the background potassium channel TREK-1 results in a depression-resistant phenotype. Nat Neurosci 2006; 9:1134-41. [PMID: 16906152 DOI: 10.1038/nn1749] [Citation(s) in RCA: 289] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2006] [Accepted: 07/21/2006] [Indexed: 12/14/2022]
Abstract
Depression is a devastating illness with a lifetime prevalence of up to 20%. The neurotransmitter serotonin or 5-hydroxytryptamine (5-HT) is involved in the pathophysiology of depression and in the effects of antidepressant treatments. However, molecular alterations that underlie the pathology or treatment of depression are still poorly understood. The TREK-1 protein is a background K+ channel regulated by various neurotransmitters including 5-HT. In mice, the deletion of its gene (Kcnk2, also called TREK-1) led to animals with an increased efficacy of 5-HT neurotransmission and a resistance to depression in five different models and a substantially reduced elevation of corticosterone levels under stress. TREK-1-deficient (Kcnk2-/-) mice showed behavior similar to that of naive animals treated with classical antidepressants such as fluoxetine. Our results indicate that alterations in the functioning, regulation or both of the TREK-1 channel may alter mood, and that this particular K+ channel may be a potential target for new antidepressants.
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Affiliation(s)
- Catherine Heurteaux
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université de Nice Sophia Antipolis, Institut Paul Hamel, 660 Route des Lucioles, Sophia-Antipolis, 06560 Valbonne, France
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28
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Clavelou P, Guy N. [Symptomatic treatments in amyotrophic lateral sclerosis]. Rev Neurol (Paris) 2006; 162 Spec No 2:4S228-4S234. [PMID: 17128116] [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] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
ALS is a progressive, fatal, degenerative motor neuron disease of unknown cause. Although advances in understanding pathophysiology of ALS have stimulated the development of new therapies, most of them remain few efficient or ineffective and the main management of ALS patient, to improve quality of life by alleviating symptoms, is symptomatic treatment. This article discusses the approaches now in use to manage some of the most common symptoms of ALS including the following: spasticity, cramps, pain, laryngospasm, pseudobulbar syndrome, salivation and drooling, sleep disorders and fatigue, constipation and trophic troubles.
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Affiliation(s)
- P Clavelou
- Neurologie, CHU Montpied, Clermont-Ferrand.
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29
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Alloui A, Zimmermann K, Mamet J, Duprat F, Noël J, Chemin J, Guy N, Blondeau N, Voilley N, Rubat-Coudert C, Borsotto M, Romey G, Heurteaux C, Reeh P, Eschalier A, Lazdunski M. TREK-1, a K+ channel involved in polymodal pain perception. EMBO J 2006; 25:2368-76. [PMID: 16675954 PMCID: PMC1478167 DOI: 10.1038/sj.emboj.7601116] [Citation(s) in RCA: 303] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2006] [Accepted: 04/04/2006] [Indexed: 12/14/2022] Open
Abstract
The TREK-1 channel is a temperature-sensitive, osmosensitive and mechano-gated K+ channel with a regulation by Gs and Gq coupled receptors. This paper demonstrates that TREK-1 qualifies as one of the molecular sensors involved in pain perception. TREK-1 is highly expressed in small sensory neurons, is present in both peptidergic and nonpeptidergic neurons and is extensively colocalized with TRPV1, the capsaicin-activated nonselective ion channel. Mice with a disrupted TREK-1 gene are more sensitive to painful heat sensations near the threshold between anoxious warmth and painful heat. This phenotype is associated with the primary sensory neuron, as polymodal C-fibers were found to be more sensitive to heat in single fiber experiments. Knockout animals are more sensitive to low threshold mechanical stimuli and display an increased thermal and mechanical hyperalgesia in conditions of inflammation. They display a largely decreased pain response induced by osmotic changes particularly in prostaglandin E2-sensitized animals. TREK-1 appears as an important ion channel for polymodal pain perception and as an attractive target for the development of new analgesics.
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Affiliation(s)
- Abdelkrim Alloui
- Laboratoire de Pharmacologie Médicale EA 3848 INSERM/Faculté de Médecine/CHU, Clermont-Ferrand, France
| | - Katharina Zimmermann
- Department of Physiology and Pathophysiology, University Erlangen-Nuremberg, Erlangen, Germany
| | - Julien Mamet
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS-Université de Nice, Institut Paul Hamel, Sophia Antipolis, Valbonne, France
| | - Fabrice Duprat
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS-Université de Nice, Institut Paul Hamel, Sophia Antipolis, Valbonne, France
| | - Jacques Noël
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS-Université de Nice, Institut Paul Hamel, Sophia Antipolis, Valbonne, France
| | - Jean Chemin
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS-Université de Nice, Institut Paul Hamel, Sophia Antipolis, Valbonne, France
| | - Nicolas Guy
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS-Université de Nice, Institut Paul Hamel, Sophia Antipolis, Valbonne, France
| | - Nicolas Blondeau
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS-Université de Nice, Institut Paul Hamel, Sophia Antipolis, Valbonne, France
| | - Nicolas Voilley
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS-Université de Nice, Institut Paul Hamel, Sophia Antipolis, Valbonne, France
| | - Catherine Rubat-Coudert
- Laboratoire de Pharmacologie Médicale EA 3848 INSERM/Faculté de Médecine/CHU, Clermont-Ferrand, France
| | - Marc Borsotto
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS-Université de Nice, Institut Paul Hamel, Sophia Antipolis, Valbonne, France
| | - Georges Romey
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS-Université de Nice, Institut Paul Hamel, Sophia Antipolis, Valbonne, France
| | - Catherine Heurteaux
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS-Université de Nice, Institut Paul Hamel, Sophia Antipolis, Valbonne, France
| | - Peter Reeh
- Department of Physiology and Pathophysiology, University Erlangen-Nuremberg, Erlangen, Germany
| | - Alain Eschalier
- Laboratoire de Pharmacologie Médicale EA 3848 INSERM/Faculté de Médecine/CHU, Clermont-Ferrand, France
| | - Michel Lazdunski
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS-Université de Nice, Institut Paul Hamel, Sophia Antipolis, Valbonne, France
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS-Université de Nice, Institut Paul Hamel, 660, Route des Lucioles, Sophia Antipolis, 06560 Valbonne, France. Tel.: +33 493 957702; Fax: +33 493 957704; E-mail:
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30
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Lauritzen I, Chemin J, Honoré E, Jodar M, Guy N, Lazdunski M, Jane Patel A. Cross-talk between the mechano-gated K2P channel TREK-1 and the actin cytoskeleton. EMBO Rep 2005; 6:642-8. [PMID: 15976821 PMCID: PMC1369110 DOI: 10.1038/sj.embor.7400449] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2005] [Revised: 04/28/2005] [Accepted: 05/05/2005] [Indexed: 12/12/2022] Open
Abstract
TREK-1 (KCNK2) is a K(2P) channel that is highly expressed in fetal neurons. This K(+) channel is opened by a variety of stimuli, including membrane stretch and cellular lipids. Here, we show that the expression of TREK-1 markedly alters the cytoskeletal network and induces the formation of actin- and ezrin-rich membrane protrusions. The genetic inactivation of TREK-1 significantly alters the growth cone morphology of cultured embryonic striatal neurons. Cytoskeleton remodelling is crucially dependent on the protein kinase A phosphorylation site S333 and the interactive proton sensor E306, but is independent of channel permeation. Conversely, the actin cytoskeleton tonically represses TREK-1 mechano-sensitivity. Thus, the dialogue between TREK-1 and the actin cytoskeleton might influence both synaptogenesis and neuronal electrogenesis.
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Affiliation(s)
- Inger Lauritzen
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UMR 6097, Université de Nice-Sophia Antipolis, Institut Paul Hamel, 660 Route des Lucioles, 06560 Valbonne, France
| | - Jean Chemin
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UMR 6097, Université de Nice-Sophia Antipolis, Institut Paul Hamel, 660 Route des Lucioles, 06560 Valbonne, France
| | - Eric Honoré
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UMR 6097, Université de Nice-Sophia Antipolis, Institut Paul Hamel, 660 Route des Lucioles, 06560 Valbonne, France
| | - Martine Jodar
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UMR 6097, Université de Nice-Sophia Antipolis, Institut Paul Hamel, 660 Route des Lucioles, 06560 Valbonne, France
| | - Nicolas Guy
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UMR 6097, Université de Nice-Sophia Antipolis, Institut Paul Hamel, 660 Route des Lucioles, 06560 Valbonne, France
| | - Michel Lazdunski
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UMR 6097, Université de Nice-Sophia Antipolis, Institut Paul Hamel, 660 Route des Lucioles, 06560 Valbonne, France
| | - Amanda Jane Patel
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UMR 6097, Université de Nice-Sophia Antipolis, Institut Paul Hamel, 660 Route des Lucioles, 06560 Valbonne, France
- Tel: +33 4 93 95 7730; Fax: +33 4 93 95 7704; E-mail:
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31
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Abstract
In the thalamus, noradrenergic output from the pontine nucleus locus coeruleus (LC) may actively shape the response properties of various sensory networks en route to the cortex. Little is known, however, about the involvement of ascending noradrenergic innervation of the somatosensory thalamus in the processing of nociceptive information. To address this question, we combined the study of Fos expression upon nociceptive tooth pulp stimulation in the anaesthetized rat, with the detection of retrogradely traced neurones from the somatosensory thalamus. Cell bodies labelled retrogradely from the left thalamus were observed on both sides of the LC, with an ipsilateral predominance (n = 8). Electrical stimulation of the right incisor pulp (n = 4) provoked a significantly stronger Fos expression (around twice) than sham surgery (n = 4), in both the ipsi- and contralateral LC. Significantly larger numbers of double labelled neurones were counted in the LC of tooth-pulp-stimulated animals (representing around 30% of retrogradely labelled cells in LC) than in the LC of sham animals. They were found bilaterally, but with a clear, significant, ipsilateral (i.e. left) predominance. The present data offer an anatomical framework to understand how the LC is involved in the sensory processing of nociceptive information in the thalamus. For the first time, it is shown that nociceptive stimulation activates LC neurones projecting to the somatosensory thalamus. This suggests a new role for LC in modulating nociception within the thalamus.
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Affiliation(s)
- D L Voisin
- Inserm E216 Neurobiologie de la douleur trigéminale, Faculté de Chirurgie Dentaire, 11 boulevard Charles de Gaulle, 63000 Clermont-Ferrand, France.
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32
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Heurteaux C, Guy N, Laigle C, Blondeau N, Duprat F, Mazzuca M, Lang-Lazdunski L, Widmann C, Zanzouri M, Romey G, Lazdunski M. TREK-1, a K+ channel involved in neuroprotection and general anesthesia. EMBO J 2004; 23:2684-95. [PMID: 15175651 PMCID: PMC449762 DOI: 10.1038/sj.emboj.7600234] [Citation(s) in RCA: 390] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2004] [Accepted: 04/19/2004] [Indexed: 12/13/2022] Open
Abstract
TREK-1 is a two-pore-domain background potassium channel expressed throughout the central nervous system. It is opened by polyunsaturated fatty acids and lysophospholipids. It is inhibited by neurotransmitters that produce an increase in intracellular cAMP and by those that activate the Gq protein pathway. TREK-1 is also activated by volatile anesthetics and has been suggested to be an important target in the action of these drugs. Using mice with a disrupted TREK-1 gene, we now show that TREK-1 has an important role in neuroprotection against epilepsy and brain and spinal chord ischemia. Trek1-/- mice display an increased sensitivity to ischemia and epilepsy. Neuroprotection by polyunsaturated fatty acids, which is impressive in Trek1+/+ mice, disappears in Trek1-/- mice indicating a central role of TREK-1 in this process. Trek1-/- mice are also resistant to anesthesia by volatile anesthetics. TREK-1 emerges as a potential innovative target for developing new therapeutic agents for neurology and anesthesiology.
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Affiliation(s)
- C Heurteaux
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS, Institut Paul Hamel, Sophia-Antipolis, Valbonne, France
| | - N Guy
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS, Institut Paul Hamel, Sophia-Antipolis, Valbonne, France
| | - C Laigle
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS, Institut Paul Hamel, Sophia-Antipolis, Valbonne, France
| | - N Blondeau
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS, Institut Paul Hamel, Sophia-Antipolis, Valbonne, France
| | - F Duprat
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS, Institut Paul Hamel, Sophia-Antipolis, Valbonne, France
| | - M Mazzuca
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS, Institut Paul Hamel, Sophia-Antipolis, Valbonne, France
| | - L Lang-Lazdunski
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS, Institut Paul Hamel, Sophia-Antipolis, Valbonne, France
| | - C Widmann
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS, Institut Paul Hamel, Sophia-Antipolis, Valbonne, France
| | - M Zanzouri
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS, Institut Paul Hamel, Sophia-Antipolis, Valbonne, France
| | - G Romey
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS, Institut Paul Hamel, Sophia-Antipolis, Valbonne, France
| | - M Lazdunski
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS, Institut Paul Hamel, Sophia-Antipolis, Valbonne, France
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS-UMR 6097, Institut Paul Hamel, 660 Route des Lucioles, Sophia-Antipolis, 06560 Valbonne, France. Tel.: +33 493 957702/03; Fax: +33 493 957704; E-mail:
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33
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Warth R, Barrière H, Meneton P, Bloch M, Thomas J, Tauc M, Heitzmann D, Romeo E, Verrey F, Mengual R, Guy N, Bendahhou S, Lesage F, Poujeol P, Barhanin J. Proximal renal tubular acidosis in TASK2 K+ channel-deficient mice reveals a mechanism for stabilizing bicarbonate transport. Proc Natl Acad Sci U S A 2004; 101:8215-20. [PMID: 15141089 PMCID: PMC419583 DOI: 10.1073/pnas.0400081101] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.9] [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: 11/18/2022] Open
Abstract
The acid- and volume-sensitive TASK2 K+ channel is strongly expressed in renal proximal tubules and papillary collecting ducts. This study was aimed at investigating the role of TASK2 in renal bicarbonate reabsorption by using the task2 -/- mouse as a model. After backcross to C57BL6, task2 -/- mice showed an increased perinatal mortality and, in adulthood, a reduced body weight and arterial blood pressure. Patch-clamp experiments on proximal tubular cells indicated that TASK2 was activated during HCO3- transport. In control inulin clearance measurements, task2 -/- mice showed normal NaCl and water excretion. During i.v. NaHCO3 perfusion, however, renal Na+ and water reabsorption capacity was reduced in -/- animals. In conscious task2 -/- mice, blood pH, HCO3- concentration, and systemic base excess were reduced but urinary pH and HCO3- were increased. These data suggest that task2 -/- mice exhibit metabolic acidosis caused by renal loss of HCO3-. Both in vitro and in vivo results demonstrate the specific coupling of TASK2 activity to HCO3- transport through external alkalinization. The consequences of the task2 gene inactivation in mice are reminiscent of the clinical manifestations seen in human proximal renal tubular acidosis syndrome.
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Affiliation(s)
- Richard Warth
- Institute of Physiology, Universitätsstrasse 31, 93053 Regensburg, Germany
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Ettaiche M, Guy N, Hofman P, Lazdunski M, Waldmann R. Acid-sensing ion channel 2 is important for retinal function and protects against light-induced retinal degeneration. J Neurosci 2004; 24:1005-12. [PMID: 14762118 PMCID: PMC6793571 DOI: 10.1523/jneurosci.4698-03.2004] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.2] [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: 11/21/2022] Open
Abstract
pH variations in the retina are thought to be involved in the fine-tuning of visual perception. We show that both photoreceptors and neurons of the mouse retina express the H+-gated cation channel subunits acid-sensing ion channel 2a (ASIC2a) and ASIC2b. Inactivation of the ASIC2 gene in mice leads to an increase in the rod electroretinogram a- and b-waves and thus to an enhanced gain of visual transduction. ASIC2 knock-out mice are also more sensitive to light-induced retinal degeneration. We suggest that ASIC2 is a negative modulator of rod phototransduction, and that functional ASIC2 channels are beneficial for the maintenance of retinal integrity.
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Affiliation(s)
- Mohamed Ettaiche
- Institute of Molecular and Cellular Pharmacology, Centre National de la Recherche Scientifique, Unité Mixte de Recherche 6097, Sophia-Antipolis, 06560 Valbonne, France
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35
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Colodner R, Rock W, Chazan B, Keller N, Guy N, Sakran W, Raz R. Risk factors for the development of extended-spectrum beta-lactamase-producing bacteria in nonhospitalized patients. Eur J Clin Microbiol Infect Dis 2004; 23:163-7. [PMID: 14986159 DOI: 10.1007/s10096-003-1084-2] [Citation(s) in RCA: 224] [Impact Index Per Article: 11.2] [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: 10/26/2022]
Abstract
Although the risk factors for acquiring infection by extended-spectrum beta-lactamase (ESBL)-producing bacteria have been investigated in hospitalized patients, such risk factors have not been defined in the community setting. In this study, clinical data from a total of 311 nonhospitalized patients with community-acquired urinary tract infection (128 with ESBL-positive strains and 183 with ESBL-negative strains) were obtained. According to a multivariate analysis, the following were identified as independent risk factors: previous hospitalization in the past 3 months (OR=8.95, 95%CI, 3.77-21.25), antibiotic treatment in the past 3 months (OR=3.23, 95%CI, 1.76-5.91), age over 60 years (OR=2.65, 95%CI, 1.45-4.83), diabetes (OR=2.57, 95%CI, 1.20-5.51), male gender (OR=2.47, 95%CI, 1.22-5.01), Klebsiella pneumoniae infection (OR=2.31, 95%CI, 1.17-4.54), previous use of third-generation cephalosporins (P=0.014, OR=15.8, 95%CI, 1.7-143), previous use of second-generation cephalosporins (P<0.0001, OR=10.1, 95%CI, 4.2-24), previous use of quinolones (P=0.001, OR=4.1, 95%CI, 1.8-9.0), and previous use of penicillin (P=0.003, OR=4.0, 95%CI, 1.6-9.0).
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Affiliation(s)
- R Colodner
- Clinical Microbiology Laboratory, Ha'Emek Medical Center, 18101 Afula, Israel.
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Barriere H, Belfodil R, Rubera I, Tauc M, Lesage F, Poujeol C, Guy N, Barhanin J, Poujeol P. Role of TASK2 potassium channels regarding volume regulation in primary cultures of mouse proximal tubules. J Gen Physiol 2003; 122:177-90. [PMID: 12860925 PMCID: PMC2229545 DOI: 10.1085/jgp.200308820] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.7] [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] [Indexed: 12/12/2022] Open
Abstract
Several papers reported the role of TASK2 channels in cell volume regulation and regulatory volume decrease (RVD). To check the possibility that the TASK2 channel modulates the RVD process in kidney, we performed primary cultures of proximal convoluted tubules (PCT) and distal convoluted tubules (DCT) from wild-type and TASK2 knockout (KO) mice. In KO mice, the TASK2 coding sequence was in part replaced by the lac-Z gene. This allows for the precise localization of TASK2 in kidney sections using beta-galactosidase staining. TASK2 was only localized in PCT cells. K+ currents were analyzed by the whole-cell clamp technique with 125 mM K-gluconate in the pipette and 140 mM Na-gluconate in the bath. In PCT cells from wild-type mice, hypotonicity induced swelling-activated K+ currents insensitive to 1 mM tetraethylammonium, 10 nM charybdotoxin, and 10 microM 293B, but blocked by 500 microM quinidine and 10 microM clofilium. These currents were increased in alkaline pH and decreased in acidic pH. In PCT cells from TASK2 KO, swelling-activated K+ currents were completely impaired. In conclusion, the TASK2 channel is expressed in kidney proximal cells and could be the swelling-activated K+ channel responsible for the cell volume regulation process during osmolyte absorptions in the proximal tubules.
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Affiliation(s)
- Herve Barriere
- UMR CNRS 6548, Université de Nice-Sophia Antipolis, 06108 Nice Cedex 2, France
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37
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Zeitz KP, Guy N, Malmberg AB, Dirajlal S, Martin WJ, Sun L, Bonhaus DW, Stucky CL, Julius D, Basbaum AI. The 5-HT3 subtype of serotonin receptor contributes to nociceptive processing via a novel subset of myelinated and unmyelinated nociceptors. J Neurosci 2002; 22:1010-9. [PMID: 11826129 PMCID: PMC6758503] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023] Open
Abstract
Serotonin is a major component of the inflammatory chemical milieu and contributes to the pain of tissue injury via an action on multiple receptor subtypes. Here we studied mice after genetic or pharmacological disruption of the 5-HT(3) receptor, an excitatory serotonin-gated ion channel. We demonstrate that tissue injury-induced persistent, but not acute, nociception is significantly reduced after functional elimination of this receptor subtype. Specifically, in the setting of tissue injury, the 5-HT(3) receptor mediates activation of nociceptors but does not contribute to injury-associated edema. This result is explained by the localization of 5-HT(3) receptor transcripts to a previously uncharacterized subset of myelinated and unmyelinated afferents, few of which express the proinflammatory neuropeptide substance P. Finally, we provide evidence that central serotonergic circuits modulate nociceptive transmission via a facilitatory action at spinal 5-HT(3) receptors. We conclude that activation of both peripheral and central 5-HT(3) receptors is pronociceptive and that the contribution of peripheral 5-HT(3) receptors involves a novel complement of primary afferent nociceptors.
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MESH Headings
- Animals
- Autoradiography
- Behavior, Animal/physiology
- Cells, Cultured
- Mice
- Mice, Inbred Strains
- Mice, Mutant Strains
- Nerve Fibers/metabolism
- Nerve Fibers, Myelinated/metabolism
- Nociceptors/cytology
- Nociceptors/metabolism
- Pain/genetics
- Pain/metabolism
- Pain Measurement
- Protein Subunits
- Radioligand Assay
- Receptors, Serotonin/deficiency
- Receptors, Serotonin/genetics
- Receptors, Serotonin/metabolism
- Receptors, Serotonin, 5-HT3
- Serotonin/metabolism
- Stem Cells/cytology
- Stem Cells/metabolism
- Transfection
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Affiliation(s)
- Karla P. Zeitz
- Departments of Anatomy and Physiology and W. M. Keck Foundation Center for Integrative Neuroscience and
- K.P.Z., N.G., and A.B.M. contributed equally to this work. Correspondence should be addressed to Allan Basbaum, Department of Anatomy, University of California at San Francisco, 513 Parnassus Avenue, Box 0452, San Francisco, CA 94143. E-mail: . N. Guy's present address: Centre National de la Recherche Scientifique, l'Institut de Pharmacologie Moléculaire et cellulaire, 06560 Valbonne, France. A. B. Malmberg's present address: NeurogesX, 969C Industrial Road, San Carlos, CA 94070. W. J. Martin's present address: Merck and Co., P.O. Box 2000, RY80Y-145, Rahway, NJ 07065
| | - Nicolas Guy
- Department of Cellular and Molecular Pharmacology and Silvio Conte Center for Neuroscience Research, University of California at San Francisco, San Francisco, California 94143
- K.P.Z., N.G., and A.B.M. contributed equally to this work. Correspondence should be addressed to Allan Basbaum, Department of Anatomy, University of California at San Francisco, 513 Parnassus Avenue, Box 0452, San Francisco, CA 94143. E-mail: . N. Guy's present address: Centre National de la Recherche Scientifique, l'Institut de Pharmacologie Moléculaire et cellulaire, 06560 Valbonne, France. A. B. Malmberg's present address: NeurogesX, 969C Industrial Road, San Carlos, CA 94070. W. J. Martin's present address: Merck and Co., P.O. Box 2000, RY80Y-145, Rahway, NJ 07065
| | - Annika B. Malmberg
- Departments of Anatomy and Physiology and W. M. Keck Foundation Center for Integrative Neuroscience and
- K.P.Z., N.G., and A.B.M. contributed equally to this work. Correspondence should be addressed to Allan Basbaum, Department of Anatomy, University of California at San Francisco, 513 Parnassus Avenue, Box 0452, San Francisco, CA 94143. E-mail: . N. Guy's present address: Centre National de la Recherche Scientifique, l'Institut de Pharmacologie Moléculaire et cellulaire, 06560 Valbonne, France. A. B. Malmberg's present address: NeurogesX, 969C Industrial Road, San Carlos, CA 94070. W. J. Martin's present address: Merck and Co., P.O. Box 2000, RY80Y-145, Rahway, NJ 07065
| | - Sahera Dirajlal
- Departments of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, and
| | - William J. Martin
- Departments of Anatomy and Physiology and W. M. Keck Foundation Center for Integrative Neuroscience and
| | - Linda Sun
- Department of Cellular and Molecular Pharmacology and Silvio Conte Center for Neuroscience Research, University of California at San Francisco, San Francisco, California 94143
| | | | - Cheryl L. Stucky
- Departments of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, and
| | - David Julius
- Department of Cellular and Molecular Pharmacology and Silvio Conte Center for Neuroscience Research, University of California at San Francisco, San Francisco, California 94143
| | - Allan I. Basbaum
- Departments of Anatomy and Physiology and W. M. Keck Foundation Center for Integrative Neuroscience and
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Guy N, Deffond D, Gabrillargues J, Carriere N, Dordain G, Clavelou P. Spontaneous internal carotid artery dissection with lower cranial nerve palsy. Can J Neurol Sci 2001; 28:265-9. [PMID: 11513348 DOI: 10.1017/s031716710000144x] [Citation(s) in RCA: 19] [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] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Typical presentation of spontaneous internal carotid artery (ICA) dissection is an ipsilateral pain in neck and face with Horner's syndrome and contralateral deficits. Although rare, lower cranial nerve palsy have been reported in association with an ipsilateral spontaneous ICA dissection. CASE STUDIES We report three new cases of ICA dissection with lower cranial nerve palsies. RESULTS The first symtom to appear was headache in all three patients. Examination disclosed a Horner's syndrome in two cases (1 and 2), an isolated XIIth nerve palsy in two patients (case 1 and 3) and IX, X, and XIIth nerve palsies (case 2) revealing an ipsilateral carotid dissection, confirmed by MRI and angiography. In all cases, prognosis was good after a few weeks. CONCLUSIONS These cases, analysed with those in the literature, led us to discuss two possible mechanisms: direct compression of cranial nerves by a subadventitial haematoma in the parapharyngeal space or ischemic palsy by compression of the ascending pharyngeal artery.
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Affiliation(s)
- N Guy
- Fédération de Neurologie, CHU de Clermont Ferrand, France
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39
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Spivak B, Musin E, Mester R, Gonen N, Talmon Y, Guy N, Roitman S, Kupchik M, Kotler M, Weizman A. The effect of long-term antipsychotic treatment on the body weight of patients suffering from chronic schizophrenia: clozapine versus classical antipsychotic agents. Int Clin Psychopharmacol 1999; 14:229-32. [PMID: 10468315 DOI: 10.1097/00004850-199907000-00004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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: 11/26/2022]
Abstract
The aim of this study was to evaluate the effect of long-term clozapine treatment on body weight changes in neuroleptic-resistant chronic schizophrenic patients and to compare it with that of classical antipsychotic agents. The body mass index (BMI) of 96 neuroleptic-resistant chronic schizophrenic patients was calculated before the beginning and after long-term (mean +/- SD 1.7 +/- 1.3 years) clozapine treatment. These data were compared to the BMI of 98 chronic schizophrenic patients maintained on classical antipsychotic agents for a similar duration (mean +/- SD 1.9 +/- 1.6 years). A significant elevation in BMI was detected in both groups during these periods (P < 0.0001 versus baseline, for both groups). The change in BMI (delta BMI) was similar in both groups (P < 0.9). We conclude that the increase in body weight caused by long-term (> 6 months) clozapine treatment is comparable to that obtained following long-term classical antipsychotic agents treatment.
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Affiliation(s)
- B Spivak
- Ness-Ziona Mental Health Center, Israel
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40
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Pfeiffer E, Guy N, Cribb A. Clomipramine-induced urinary retention in a cat. Can Vet J 1999; 40:265-7. [PMID: 10200885 PMCID: PMC1539679] [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: 02/11/2023]
Abstract
A 10-year-old, female, spayed shorthair with presumed psychogenic alopecia was treated with clomipramine (1 mg/kg body weight/day). The cat developed urinary retention within 2 days. Clomipramine was discontinued. Clinical signs resolved over the next 7 days. The urinary retention was attributed to the anticholinergic effects of clomipramine.
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Affiliation(s)
- E Pfeiffer
- South Central Veterinary Clinic, Notre-Dame, Manitoba
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41
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Spivak B, Lamschtein C, Talmon Y, Guy N, Mester R, Feinberg I, Kotler M, Weizman A. The impact of clozapine treatment on serum lipids in chronic schizophrenic patients. Clin Neuropharmacol 1999; 22:98-101. [PMID: 10202605 DOI: 10.1097/00002826-199903000-00006] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.6] [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: 11/26/2022]
Abstract
The aim of this retrospective study is to determine whether lipid levels rise in neuroleptic-resistant chronic schizophrenic patients during clozapine treatment and if this rise is correlated with a decrease in aggressive and suicidal behavior. Seventy neuroleptic-resistant schizophrenic patients treated with clozapine for at least 6 months were compared with 30 chronic schizophrenic patients treated with classic antipsychotic agents for the same length of time. Data on serum levels of cholesterol and triglycerides and on aggressive and suicidal behavior, as measured by the Overt Aggression Scale (OAS), were collected in both groups before treatment and 6 months later. A significant reduction in aggressive and suicidal behavior was noted in the clozapine-treated group but not in the classical antipsychotic-treated group. Clozapine treatment was associated with an elevation in serum triglyceride level, whereas classic antipsychotic treatment was associated with an increase in serum cholesterol level. We conclude that serum cholesterol level does not play a role in the clozapine-induced attenuation in aggressive and suicidal behavior in neuroleptic-resistant schizophrenic patients, though the accompanying elevation in triglycerides may be relevant to a behavioral effect.
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Affiliation(s)
- B Spivak
- Ness Ziona Psychiatric Hospital, Israel
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42
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Spivak B, Roitman S, Vered Y, Mester R, Graff E, Talmon Y, Guy N, Gonen N, Weizman A. Diminished suicidal and aggressive behavior, high plasma norepinephrine levels, and serum triglyceride levels in chronic neuroleptic-resistant schizophrenic patients maintained on clozapine. Clin Neuropharmacol 1998; 21:245-50. [PMID: 9704166] [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] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Impulsiveness and aggressiveness may be the most common behavioral correlates of central serotonergic dysfunction. The aim of this study was to determine whether clozapine, an atypical antipsychotic agent with a potent serotonergic antagonistic activity, affects impulsiveness and aggression. Its effects on serum lipids, platelet-poor plasma serotonin (5-HT), and norepinephrine (NE) levels were also studied. Thirty neuroleptic-resistant chronic schizophrenic patients, maintained on clozapine for 1 year, were evaluated for aggressiveness, impulsiveness, and suicidality in comparison with 30 chronic schizophrenic patients maintained on classical antipsychotic agents for the same period of time. Clozapine treatment was associated with less impulsiveness (p < 0.05), aggressiveness (p < 0.01) and fewer suicidal attempts (p < 0.05). Serum triglycerides and plasma NE levels were significantly higher (p < 0.01 and p < 0.0001, respectively) in the patients treated with clozapine, as compared with patients treated with classical neuroleptic drugs. The authors conclude that long-term clozapine treatment may be effective in controlling aggressive, impulsive, and suicidal behavior in neuroleptic-resistant chronic schizophrenic patients. The elevated plasma NE levels in patients treated with clozapine as compared to those treated with classical neuroleptic drugs may be relevant for the anti-aggressive/antisuicidal activity of clozapine.
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Affiliation(s)
- B Spivak
- Research Unit, Ness-Ziona Mental Health Center, Israel
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43
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Talmon Y, Guy N, Wittenberg N. [Clozapine for resistant schizophrenia and characteristics of those responding]. Harefuah 1995; 129:451-4, 536. [PMID: 8846949] [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: 02/02/2023]
Abstract
Clozapine (Leponex) is an atypical antipsychotic drug which is effective in the treatment of resistant schizophrenia. The most severe side-effect is agranulocytosis, which occurs in 12%. 50 patients with resistant schizophrenia were screened retrospectively in order to characterize features which might help predict good response to the drug. The drug was more effective in young patients with recent onset of illness and short total duration of hospitalization.
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Affiliation(s)
- Y Talmon
- Psychiatric Day Care Unit, Kaplan Hospital, Rehovot
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44
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Fadlallah N, Guy N, Teillet MA, Schuler B, Le Douarin NM, Naquet R, Batini C. Brain chimeras for the study of an avian model of genetic epilepsy: structures involved in sound and light-induced seizures. Brain Res 1995; 675:55-66. [PMID: 7796153 DOI: 10.1016/0006-8993(95)00038-r] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [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: 01/27/2023]
Abstract
The epileptic homozygotes of the Fayoumi strain of chickens (Fepi) are affected by photogenic reflex epilepsy with complete penetrance. Here we demonstrate that they are equally affected by audiogenic reflex epilepsy induced by intense sound stimulation. All the Fepi display sound-induced seizures from hatching to adulthood consisting of initial 'ictal arousal' and running fits usually followed by generalized clonico-tonic convulsions. A running fit is the preconvulsive motor symptom specifically induced by auditory stimulation while neck myoclonus is the preconvulsive motor symptom specifically induced by photic stimulation. The EEG interictal spikes and spike and waves are suppressed and replaced by a desynchronized trace during the seizures of both kinds. Viable neural chimeras were obtained by graft of embryonic brain vesicles from Fepi donors into normal chick embryos. Transfer of the complete audiogenic and photogenic phenotypes was obtained in chimeras resulting from embryonic substitution of both the prosencephalon and mesencephalon. The substitution of the prosencephalon alone resulted in transfer of interictal paroxysmal EEG activity accompanied by the sound and light-induced desynchronization and 'ictal arousal' with no motor seizures. Chimeras with embryonic substitution of the mesencephalon alone displayed running fits and convulsions induced by sound stimulation but only neck myoclonus following light stimulation. The conclusions are reached that: (i) the Fepi is a model of audiogenic and photogenic reflex epilepsy; (ii) in both types, the seizure initiator and the convulsion generator are localized in the brainstem, although reinforcement from telencephalic visual structures is needed to trigger photogenic generalized convulsions.
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Affiliation(s)
- N Fadlallah
- Laboratoire de Physiologie de la Motricité, CNRS et Université Pierre et Marie Curie, Paris, France
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Teillet MA, Guy N, Fadlallah N, Le Gal La Salle G, Schuler B, Batini C, Le Douarin N, Naquet R. Reflex epilepsy of the fowl and its transfer to normal chickens by brain embryonic grafts. Ital J Neurol Sci 1995; 16:83-89. [PMID: 7642357 DOI: 10.1007/bf02229079] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The genetic photosensitive epilepsy of the Fayoumi chicken was transferred to normal chickens by in situ grafts at 2 days of incubation, of both the prosencephalic and mesencephalic brain vesicles taken from epileptic embryos. However, mesencephalic graft is sufficient to allow convulsions under sound stimulation. Typical EEG patterns are recorded in chimeras having the prosencephalon plus or not the mesencephalon. We conclude that, in this mutant, the whole neural tissue is affected, but the seizure generator is localized inside the mesencephalon, and specific sensory pathways are necessary for seizures to occur.
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Affiliation(s)
- M A Teillet
- Institut d'Embryologie Cellulaire et Moléculaire, CNRS-UMRC 9924, Nogent/Marne, France
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Talmon Y, Guy M, Eisenkraft S, Guy N. [A case of self-circumcision]. Harefuah 1994; 127:230-1, 287. [PMID: 7813947] [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: 01/27/2023]
Abstract
A 29-year-old bachelor had immigrated from Uzbekistan to Israel 2 years before to improve his economic situation. He began drinking at the age of 20, and increased to 1-1.5 bottles of vodka a day. He was unable to keep a job more than a few months. When called up for limited military service, he thought that the army might be a solution for his employment problem. However, he felt that he would not be able to integrate into the army, and later into Israeli society, unless he was circumcised. The Ministry of Religion deferred his request for a religious circumcision because they did not consider him Jewish. Since he could not afford to pay for the operation, he read up on the procedure, drank a bottle of vodka as premedication, and tried to circumcise himself with a razor blade. Since he was unable to control bleeding, he applied to the hospital emergency room half an hour later, where the circumcision was completed and sutured. The psychiatric diagnosis was an unspecified personality disorder with psychopathic but not psychotic features.
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Affiliation(s)
- Y Talmon
- Psychiatry Dept., Kaplan Hospital, Rehovot
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47
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Talmon Y, Abrahams A, Guy N. [Mediagenic psychoses]. Harefuah 1994; 127:13-6, 63. [PMID: 7959379] [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: 01/28/2023]
Abstract
Disturbances of psychotic intensity resulting from external trauma at times of crisis and tension have been described in the literature, particularly in combat reactions, including the Saddam syndrome. Acute psychoses as reactions to mystical-religious fervor have also been described. We describe 2 clusters of patients admitted with an acute, delusional, psychotic picture against the background of the Vanunu treason trial and later the strong messianic expectations aroused among the followers of the Rebbe of Lubavitch. Both of these events received extensive coverage in the Israeli press and electronic telecommunication media. The emergence of the mental disturbances and the content of the psychoses were linked to the particularly strident and dramatic media coverage of these 2 events. The impact of the reports of wide-spread messianic fantasies in the contemporary news bulletins on those with preexisting premorbid sensitivity was sufficient to trigger the psychoses. The delusional content was topical, and not that of the traditional psychotic delusions such as that of being Napoleon. This emphasizes that not only an authentic major external trauma such as a war is capable of triggering psychosis, but also emotionladen, stressful news items, frequently repeated in the media (such as reports of espionage or messianic fervor), may have similar effects.
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Affiliation(s)
- Y Talmon
- Psychiatric Service, Kaplan Hospital, Rehovot
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Talmon Y, Guy M, Eisenkraft S, Guy N. [Retrograde ejaculation as a side-effect of clozapine]. Harefuah 1994; 126:509-10, 563. [PMID: 8034264] [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: 01/28/2023]
Abstract
3 chronic paranoid schizophrenic men, aged 29, 30 and 37 years, respectively, developed retrograde ejaculation, a rare side-effect of clozapine. It disappeared after the dose was lowered in 1 of the patients and after stopping the drug in the other 2. On rechallenging with the drug, retrograde ejaculation recurred.
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Affiliation(s)
- Y Talmon
- Psychiatric Day-Care Unit, Kaplan Hospital, Rehovot
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49
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Guy N. [Principles of the process of computerization in primary care clinic]. Harefuah 1994; 126:324-8. [PMID: 8194789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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50
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Talmon Y, Guy M, Eisenkraft S, Guy N. Ejaculatory Dysfunction Produced by Clozapine. Three Case Reports and Review of Pathophysiological Mechanisms. Urologia 1993. [DOI: 10.1177/039156039306000413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Three chronic paranoid schizophrenic patients were treated with clozapine, a new anti-psychotic agent. Retrograde ejaculation developed as a side-effect. Stopping the drug therapy or reducing the dosage caused the side-effect to disappear. Re-challenge caused the return of the side-effect. We discuss this rare side-effect to clozapine, and the pathophysiological mechanisms of ejaculation disturbances, with emphasis on those that are drug-induced.
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Affiliation(s)
- Y. Talmon
- Department of Psychiatry
- Hebrew University Hadassah - Medical School - Jerusalem - Israel
| | - M. Guy
- Department of Urology - Kaplan Hospital - Rehovot - Israel
- Hebrew University Hadassah - Medical School - Jerusalem - Israel
| | - S. Eisenkraft
- Department of Urology - Kaplan Hospital - Rehovot - Israel
- Hebrew University Hadassah - Medical School - Jerusalem - Israel
| | - N. Guy
- Department of Psychiatry
- Hebrew University Hadassah - Medical School - Jerusalem - Israel
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