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Camacho AI, Mas-Peinado P, Hutchins BT, Schwartz BF, Dorda BA, Casado A, Rey I. New stygofauna from Texas, USA: three new species of Parabathynellidae (Crustacea: Bathynellacea). J NAT HIST 2021. [DOI: 10.1080/00222933.2021.1928316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- A. I. Camacho
- Dpto. Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales (CSIC), Madrid, Spain
| | - P. Mas-Peinado
- Dpto. Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales (CSIC), Madrid, Spain
- Centro de Investigación en Biodiversidad y Cambio Global CIBC-UAM, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, Spain
| | - B. T. Hutchins
- Edwards Aquifer Research and Data Center, Texas State University, San Marcos, TX, USA
| | - B. F. Schwartz
- Edwards Aquifer Research and Data Center, Texas State University, San Marcos, TX, USA
- Department of Biology, Texas State University, San Marcos, TX, USA
| | - B. A. Dorda
- Dpto. Colecciones, Colección de Tejidos y AND, Museo Nacional de Ciencias Naturales (CSIC), Madrid, Spain
| | - A. Casado
- Dpto. Colecciones, Colección de Tejidos y AND, Museo Nacional de Ciencias Naturales (CSIC), Madrid, Spain
| | - I. Rey
- Dpto. Colecciones, Colección de Tejidos y AND, Museo Nacional de Ciencias Naturales (CSIC), Madrid, Spain
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Basquiera AL, García MJ, Martinez Rolón J, Olmedo J, Laviano J, Burgos R, Caeiro G, Remaggi G, Raña P, Paoletti M, González CM, Fernández I, Pavlovsky A, Perusini MA, Rodriguez A, Guanchiale L, Carvani A, Mandrile L, Figueroa F, Vicente Reparaz A, Fragapane Mathus PN, Garate G, Fauque ME, Kantor G, Cruset S, Gonzalez Lorch JS, Szelagowski M, Giarini MP, Oliveira N, García MC, Ventriglia MV, Pereyra PH, Gutierrez DR, Kusminsky G, Troccoli J, Freitas MJ, Cranco S, Del V Sanchez N, Rey I, Funes ME, Jarchum S, Freue J, Miroli A, Guerrero O, López Ares L, Campestri R, Bove V, Salinas GN, Cabrejo M, Milone JH, Zabaljauregui S, Gotta D, Dupont JC, Stemmelin G. Clinical characteristics and evolution of hematological patients and COVID-19 in Argentina: a report from the Argentine Society of Hematology. Medicina (B Aires) 2021; 81:536-545. [PMID: 34453794] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023] Open
Abstract
Individuals with malignancies and COVID-19 have a lower survival compared with the general population. However, the information about the impact of COVID-19 on the whole hematological population is scarce. We aimed to describe the 30th day overall survival (OS) after COVID-19 infection in patients with a hematological disease in Argentina. A completely anonymous survey from the Argentine Society of Hematology was delivered to all the hematologists in Argentina; it started in April 2020. A cut-off to analyze the data was performed in December 2020 and, finally, 419 patients were reported and suitable for the analysis (average age: 58 years, 90% with malignant diseases). After the COVID-19 diagnosis, the 30-day OS for the whole population was 80.2%. From the entire group (419), 101 (24.1%) individuals required intensive care unit admission, where the 30-day OS was 46.6%. Among allogeneic stem cell transplant recipients, the 30-day OS was 70.3%. Factors associated with a low OS were two or more comorbidities, an active hematological disease and history of chemotherapy. In individuals with the three factors, the 30-day OS was 49.6% while the 30-day OS in those without those factors was 100%. Patients with hematological diseases have a higher mortality than the general population. This group represents a challenge and requires careful decision-making of the treatment in order not to compromise the chances of cure.
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Affiliation(s)
- Ana L Basquiera
- Hospital Privado Universitario de Córdoba, Córdoba, Argentina. E-mail:
| | - Mercedes J García
- Hospital Privado Universitario de Córdoba, Córdoba, Argentina
- Hospital Raúl Ferreyra, Córdoba, Argentina
| | | | | | | | - Rubén Burgos
- Conciencia-Instituto Oncohematológico de la Patagonia, Argentina
| | - Gastón Caeiro
- Hospital Privado Universitario de Córdoba, Córdoba, Argentina
- Hospital Raúl Ferreyra, Córdoba, Argentina
| | | | - Pablo Raña
- Conciencia-Instituto Oncohematológico de la Patagonia, Argentina
| | | | | | | | | | | | | | | | - Analia Carvani
- Hospital Diego Paroissien, Isidro Casanova, Buenos Aires, Argentina
| | - Laura Mandrile
- Hospital Diego Paroissien, Isidro Casanova, Buenos Aires, Argentina
| | | | | | | | | | | | | | - Soledad Cruset
- Hospital El Cruce, Florencio Varela, Buenos Aires, Argentina
| | | | | | | | | | | | | | | | | | | | | | - María J Freitas
- Hospital Nacional Posadas, El Palomar, Buenos Aires, Argentina
| | | | | | - Irene Rey
- Hospital Ramos Mejía, Buenos Aires, Argentina
| | | | | | | | | | | | | | | | - Victor Bove
- Instituto Oncohematológico Privado, Río Cuarto, Córdoba, Argentina
| | | | - María Cabrejo
- Sanatorio Municipal Julio Méndez, Buenos Aires, Argentina
| | | | | | - Daniel Gotta
- Hospital Urquiza, Concepción del Uruguay, Entre Ríos, Argentina
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Ceresetto JM, Duboscq C, Korin J, Fondevila C, Casais P, Rossi A, Scazziota A, Martinuzzo M, Aris Cancela ME, Rosa C, Pombo G, Guimelli C, Adamczuk Y, Martí A, Penchasky D, Riveros D, Puente D, Celebrin L, Molnar S, Meschengieser S, Castro Ríos M, Blanco A, Hendler H, Brodsky A, Sánchez Luceros A, Negri Aranguren P, Fedele JL, Merlo C, Raña P, Gumpel C, Colorio C, Grand B, Canónico V, Rossi E, Colimodio P, Orlando S, Fassi D, Arias M, Viudez L, Farreras R, Martínez P, Ferro H, Casali C, Baques A, Arbesú G, Viñuales S, Medina F, Cortés V, Gallo MDC, Ehelou L, Barrera L, Rey I, de Larrañaga G, Figueroa F, Vilaseca A, Kuri I, Maneyro A, Otaran M, Xavier DL, Garbiero S, Salviú J, Fontenla P, Eckhardt A, Bomparola C, Fornasiero L. [Argentine Consensus in effective management of anticoagulation clinics for the use of vitamin k antagonists]. Medicina (B Aires) 2020; 80 Suppl 4:1-26. [PMID: 32897867] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023] Open
Abstract
Treating an anticoagulated patient with vitamin K antagonists (VKA) remains a challenge, especially in areas where dicoumarins are still the first drug of choice due to the cost of other oral anticoagulants. Anticoagulation clinics have proven to be the most efficient and safe way to avoid thrombotic and hemorrhagic complications and to keep patients in optimal treatment range. However, they require adequate infrastructure and trained personnel to work properly. In this Argentine consensus we propose a series of guidelines for the effective management of the anticoagulation clinics. The goal is to achieve the excellence in both the clinical healthcare and the hemostasis laboratory for the anticoagulated patient. The criteria developed in the document were agreed upon by a large group of expert specialists in hematology and biochemistry from all over the country. The criteria presented here must always be considered when indicating VKA although they had to be adapted to the unequal reality of each center. Taking these premises into consideration will allow us to optimize the management of the anticoagulated patient with VKA and thus minimize thrombotic and hemorrhagic intercurrences, in order to honor our promise not to harm the patient.
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Affiliation(s)
| | | | - Jorge Korin
- Consultorios Hematológicos, Buenos Aires, Argentina
| | | | | | | | | | | | | | - Claudio Rosa
- Hospital Universitario Austral, Pilar, Provincia de Buenos Aires, Argentina
| | | | - Carla Guimelli
- Instituto de Cardiología de Corrientes Juana Francisca Cabral, Corrientes, Argentina
| | - Yolanda Adamczuk
- Hospital General de Agudos Dr. Enrique Tornú, Buenos Aires, Argentina
| | - Alejandra Martí
- Hospital El Cruce - Néstor Kirchner, Florencio Varela, Provincia de Buenos Aires, Argentina
| | | | - Dardo Riveros
- Centro de Educación Médica e Investigaciones Clínicas Norberto Quirno (CEMIC), Buenos Aires, Argentina
| | | | - Lucía Celebrin
- Hospital General de Agudos Dr. Enrique Tornú, Buenos Aires, Argentina
| | | | | | | | - Alicia Blanco
- IIHEMA-Academia Nacional de Medicina, Buenos Aires, Argentina
| | | | - Andrés Brodsky
- Hospital de Clínicas José de San Martín, Buenos Aires, Argenitna
| | | | | | | | - Claudio Merlo
- Hospital General de Agudos José María Ramos Mejía, Buenos Aires, Argentina
| | - Pablo Raña
- Clínica Dr. Roberto Raña, Neuquén, Argentina
| | | | | | - Beatriz Grand
- Hospital General de Agudos Dr. Juan A. Fernández, Buenos Aires, Argentina
| | | | - Eleonora Rossi
- Laboratorio de Salud Pública, San Miguel de Tucumán, Argentina
| | | | - Sergio Orlando
- Hospital Interzonal General de Agudos Dr. Rodolfo Rossi, La Plata, Provincia de Buenos Aires, Argentina
| | - Daniel Fassi
- Clínica de la Esperanza, Buenos Aires, Argentina
| | - Mirta Arias
- Hospital Dr. César Milstein, Buenos Aires, Argentina
| | | | - Roberto Farreras
- Hospital Interzonal General de Agudos Dr. Oscar E. Alende, Mar del Plata, Provincia de Buenos Aires, Argentina
| | - Pablo Martínez
- Hospital Interzonal Dr. José Penna, Bahía Blanca, Provincia de Buenos Aires, Argentina
| | - Hugo Ferro
- Clínica Suizo Argentina, Buenos Aires, Argentina
| | | | - Alejandra Baques
- Hospital Militar Central Cirujano Mayor Dr. Cosme Argerich, Buenos Aires, Argentina
| | | | | | - Fernanda Medina
- Instituto de Cardiología de Corrientes Juana Francisca Cabral, Corrientes, Argentina
| | - Verónica Cortés
- Instituto de Investigaciones Médicas Alfredo Lanari, Buenos Aires, Argentina
| | | | | | | | - Irene Rey
- Hospital General de Agudos José María Ramos Mejía, Buenos Aires, Argentina
| | | | - Flavia Figueroa
- Hospital de Día Pte. Néstor C. Kirchner, San Miguel de Tucumán, Argentina
| | | | | | | | - María Otaran
- Hospital General de Agudos José María Ramos Mejía, Buenos Aires, Argentina
| | - David Luis Xavier
- Clínica Privada Monte Grande, Monte Grande, Provincia de Buenos Aires, Argentina
| | - Susana Garbiero
- Hospital Interzonal Dr. José Penna, Bahía Blanca, Provincia de Buenos Aires, Argentina
| | - Julieta Salviú
- 4Centro de Hematología Pavlovsky, Buenos Aires, Argentina
| | - Patricia Fontenla
- Hospital San Juan de Dios, Ramos Mejía, Provincia de Buenos Aries, Argentina
| | - Andrea Eckhardt
- Hospital Privado Universitario de Córdoba, Córdoba, Argentina
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Weinhard J, Franko B, Rey I, Serra A, Baudet A, Ducret M. Déficit en vitamine B12 par exposition au protoxyde d’azote : conséquences et enjeux diagnostiques chez l’insuffisant rénal chronique. Nephrol Ther 2019. [DOI: 10.1016/j.nephro.2019.07.229] [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: 11/25/2022]
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Camacho AI, Hutchins B, Schwartz BF, Dorda BA, Casado A, Rey I. Description of a new genus and species of Bathynellidae (Crustacea: Bathynellacea) from Texas based on morphological and molecular characters. J NAT HIST 2017. [DOI: 10.1080/00222933.2017.1401680] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- A. I. Camacho
- Dpto. Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales (CSIC), Madrid, Spain
| | - B. Hutchins
- Texas Parks and Wildlife Department, Austin, TX, USA
| | - B. F. Schwartz
- Department of Biology, Aquatic Station, Texas State University, San Marcos, TX USA
- Edwards Aquifer Research and Data Center, Texas State University, San Marcos, TX USA
| | - B. A. Dorda
- Museo Nacional de Ciencias Naturales (CSIC), Dpto. Colecciones, Colección de Tejidos y ADN. Madrid, Spain
| | - A. Casado
- Museo Nacional de Ciencias Naturales (CSIC), Dpto. Colecciones, Colección de Tejidos y ADN. Madrid, Spain
| | - I. Rey
- Museo Nacional de Ciencias Naturales (CSIC), Dpto. Colecciones, Colección de Tejidos y ADN. Madrid, Spain
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Camacho A, Brancelj A, Dorda B, Casado A, Rey I. New Parabathynellidae species in Africa: the first bathynellids from Chad and an assay of their phylogenetic position in the order Bathynellacea (Crustacea: Malacostraca) based on 18S sequences. J NAT HIST 2016. [DOI: 10.1080/00222933.2016.1210260] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- A.I. Camacho
- Museo Nacional de Ciencias Naturales (CSIC), Dpto. Biodiversidad y Biología Evolutiva, C/ José Gutiérrez Abascal 2, 28006-Madrid, Spain
| | - A. Brancelj
- National Institute of Biology, Večna pot 111, 1000 Ljubljana, Slovenia
- School for Natural Sciences, Unversity of Nova Gorica, Vipavska c. 13, 5000 Nova Gorica, Slovenia
| | - B.A. Dorda
- Museo Nacional de Ciencias Naturales (CSIC), Dpto. de Colecciones. Col. de Tejidos y ADN, C/ José Gutiérrez Abascal 2, 28006-MADRID (Spain)
| | - A. Casado
- Museo Nacional de Ciencias Naturales (CSIC), Dpto. de Colecciones. Col. de Tejidos y ADN, C/ José Gutiérrez Abascal 2, 28006-MADRID (Spain)
| | - I. Rey
- Museo Nacional de Ciencias Naturales (CSIC), Dpto. de Colecciones. Col. de Tejidos y ADN, C/ José Gutiérrez Abascal 2, 28006-MADRID (Spain)
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Camacho A, Newell R, Crete Z, Dorda B, Casado A, Rey I. Northernmost discovery of Bathynellacea (Syncarida: Bathynellidae) with description of a new species ofPacificabathynellafrom Alaska (USA). J NAT HIST 2015. [DOI: 10.1080/00222933.2015.1083621] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Camacho AI, Dorda BA, Rey I. Integrated DNA and morphological taxonomy to describe a new species of the Family Bathynellidae (Crustacea, Syncarida) from Spain. GRAELLSIA 2014. [DOI: 10.3989/graellsia.2013.v69.086] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Camacho AI, Dorda BA, Rey I. Old and new taxonomic tools: description of a new genus and two new species of Bathynellidae from Spain with morphological and molecular characters. J NAT HIST 2013. [DOI: 10.1080/00222933.2013.768361] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Camacho AI, Dorda BA, Rey I. Identifying cryptic speciation across groundwater populations: first COI sequences of Bathynellidae (Crustacea, Syncarida). GRAELLSIA 2011. [DOI: 10.3989/graellsia.2011.v67.031] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Rey I, Dorda BA. Catálogo de las muestras de fauna de la Comunidad de Madrid conservadas en la colección de Tejidos y ADN del Museo Nacional de Ciencias Naturales. GRAELLSIA 2009. [DOI: 10.3989/graellsia.2006.v62.iextra.120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Boignard A, Bonadona A, Hamidfar R, Pavese P, Bouvaist H, Hammer L, Rey I, Schwebel C, Vanzetto G, Barnoud D. [Cardiogenic shock due to acute myocarditis complicating leptospirosis]. Arch Mal Coeur Vaiss 2006; 99:251-4. [PMID: 16618030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
A 48 year old man was admitted to the intensive care unit with septicaemic shock associated with febrile jaundice and anuric renal failure. Within hours, he developed cardiogenic shock with multi-organ failure due to an acute myocarditis refractory to catecholamines and requiring intra-aortic balloon pumping. The diagnosis was an ictero-haemorrhagic leptospirosis, the outcome of which was finally favourable. Myocarditis is an underestimated complication of leptospirosis because it is often symptomless. The main signs are arrhythmias, conduction defects and ST-T wave abnormalities which have little clinical expression. The disease may progress and is sometimes fatal. Leptospirosis myocarditis should therefore be carefully considered because of its potential severity and its reversibility with appropriate antibiotic therapy and also the necessity of initial management in a specific infrastructure.
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Affiliation(s)
- A Boignard
- Unité de réanimation médicale, Fédération des maladies cardiovasculaire et thoraciques, CHU de Grenoble, BP 217, 38043 Grenoble 9
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Rey I, Johansson P, Lindgren J, Lassègues JC, Grondin J, Servant L. Spectroscopic and Theoretical Study of (CF3SO2)2N- (TFSI-) and (CF3SO2)2NH (HTFSI). J Phys Chem A 1998. [DOI: 10.1021/jp980375v] [Citation(s) in RCA: 394] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- I. Rey
- Laboratoire de Physico-Chimie Moléculaire (UMR 5803), Université Bordeaux I, 351 Cours de la Libération, 33405 Talence Cedex, France, and The Ångström Laboratory, Inorganic Chemistry, Box 538, Uppsala SE−75121, Sweden
| | - P. Johansson
- Laboratoire de Physico-Chimie Moléculaire (UMR 5803), Université Bordeaux I, 351 Cours de la Libération, 33405 Talence Cedex, France, and The Ångström Laboratory, Inorganic Chemistry, Box 538, Uppsala SE−75121, Sweden
| | - J. Lindgren
- Laboratoire de Physico-Chimie Moléculaire (UMR 5803), Université Bordeaux I, 351 Cours de la Libération, 33405 Talence Cedex, France, and The Ångström Laboratory, Inorganic Chemistry, Box 538, Uppsala SE−75121, Sweden
| | - J. C. Lassègues
- Laboratoire de Physico-Chimie Moléculaire (UMR 5803), Université Bordeaux I, 351 Cours de la Libération, 33405 Talence Cedex, France, and The Ångström Laboratory, Inorganic Chemistry, Box 538, Uppsala SE−75121, Sweden
| | - J. Grondin
- Laboratoire de Physico-Chimie Moléculaire (UMR 5803), Université Bordeaux I, 351 Cours de la Libération, 33405 Talence Cedex, France, and The Ångström Laboratory, Inorganic Chemistry, Box 538, Uppsala SE−75121, Sweden
| | - L. Servant
- Laboratoire de Physico-Chimie Moléculaire (UMR 5803), Université Bordeaux I, 351 Cours de la Libération, 33405 Talence Cedex, France, and The Ångström Laboratory, Inorganic Chemistry, Box 538, Uppsala SE−75121, Sweden
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Rey I, Fath I, Parker F, Haun F, Schweighoffer F, Tocqué B. A role for Grb2 in apoptosis? Cell Death Differ 1995; 2:105-11. [PMID: 17180072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/1994] [Revised: 01/03/1995] [Accepted: 01/04/1995] [Indexed: 05/13/2023] Open
Abstract
Src homology type 2 (SH2) and type 3 (SH3) domains appear to have an important role in signal transduction pathways initiated by tyrosine kinases. SH2 domains allow proteins with signalling functions to interact with tyrosine kinases and tyrosine-phosphorylated proteins at the plasma membrane, whereas SH3 domains allow a distinct type of interaction through binding to proline-rich sequences. The adaptor protein Grb2 consists of one SH2 domain and two SH3 domains and connects tyrosine kinase receptors to activation of the Ras pathway. Its closely related counterpart, Grb3-3, thought to arise by alternative splicing of Grb2 transcripts, lacks a functional SH2 domain but retains functional SH3 domains. We recently presented evidence that Grb3-3 might deliver specific signals causing cells to undergo apoptosis. This review will document the mechanism of Grb3-3 function and discuss its putative involvement in several pathologies. It also further strengthens the notion that cells may use alternative splicing as a means to drive either a proliferative or a suicidal program.
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Affiliation(s)
- I Rey
- RPR Gencell, Rhône-Poulenc-Rorer Central Research Centre de Recherche de Vitry-Alfortville, 13 quai jules Guesde-BP14 94403 Vitry Sur Seine Cedex, France
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Abstract
Growth factor receptor-bound protein 2 (Grb2) links tyrosine-phosphorylated proteins to a guanine nucleotide releasing factor of the son of sevenless (Sos) class by attaching to the former by its Src homology 2 (SH2) moiety and to the latter by its SH3 domains. An isoform of grb2 complementary DNA (cDNA) was cloned that has a deletion in the SH2 domain. The protein encoded by this cDNA, Grb3-3, did not bind to phosphorylated epidermal growth factor receptor (EGFR) but retained functional SH3 domains and inhibited EGF-induced transactivation of a Ras-responsive element. The messenger RNA encoding Grb3-3 was expressed in high amounts in the thymus of rats at an age when massive negative selection of thymocytes occurs. Microinjection of Grb3-3 into Swiss 3T3 fibroblasts induced apoptosis. These findings indicate that Grb3-3, by acting as a dominant negative protein over Grb2 and by suppressing proliferative signals, may trigger active programmed cell death.
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Affiliation(s)
- I Fath
- Rhône-Poulenc Rorer, Centre de Recherche de Vitry-Alfortville, Vitry sur Seine, France
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Rey I, Taylor-Harris P, van Erp H, Hall A. R-ras interacts with rasGAP, neurofibromin and c-raf but does not regulate cell growth or differentiation. Oncogene 1994; 9:685-92. [PMID: 8108110] [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: 01/28/2023]
Abstract
Within the superfamily of ras-related GTP-binding proteins, only ras itself has been shown to act as an oncogene. Seven other proteins, however, have greater than 50% amino acid identity to ras and one of them, rap1A, has been shown to interact with the ras GTPase activating protein, ras-GAP, and to inhibit ras function when overexpressed. In this paper, we have examined the biological and biochemical activities of another close relative of ras, R-ras. We show that in vitro, R-ras shares a number of activities with ras; it interacts with the catalytic domain of ras-GAP, with the GAP-related domain of neurofibromin and with the ser/thr kinase, c-raf. Furthermore, R-ras stimulates the expression of c-fos when microinjected into Swiss 3T3 cells. However, unlike ras, R-ras does not include DNA synthesis or membrane ruffling in quiescent fibroblasts, nor does it induce maturation of Xenopus oocytes or differentiation of PC12 cells. In addition, we show that unlike rap1A, R-ras does not interfere with ras-stimulated gene transcription. We conclude from these experiments that although R-ras and ras share some biochemical activities, they control distinct biological processes.
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Affiliation(s)
- I Rey
- Chester Beatty Laboratories, Institute of Cancer Research, London, UK
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Abstract
GTP-binding proteins regulate a wide variety of intracellular signalling pathways in eukaryotic cells. The Ras GTP-binding proteins have received a great deal of attention since they were found to be modified by amino acid substitutions in a large number of cancers. It is now clear that Ras plays an essential role in regulating normal cell growth and differentiation, although how this is achieved biochemically is not known. The cellular concentration of Ras bound to GTP appears to be the limiting factor for signalling, and, not surprisingly, it is tightly controlled by both positive and negative regulators. There is now convincing evidence that the loss of one of these negative regulators of Ras, neurofibromin, can contribute to the development of malignancy; thus, neurofibromin behaves as a tumour suppressor gene product.
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Affiliation(s)
- I Rey
- Chester Beatty Laboratories, Institute of Cancer Research, 237 Fulham Road, London, UK SW3 6JB
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Saison-Behmoaras T, Tocqué B, Rey I, Chassignol M, Thuong NT, Hélène C. Short modified antisense oligonucleotides directed against Ha-ras point mutation induce selective cleavage of the mRNA and inhibit T24 cells proliferation. EMBO J 1991; 10:1111-8. [PMID: 1850694 PMCID: PMC452764 DOI: 10.1002/j.1460-2075.1991.tb08051.x] [Citation(s) in RCA: 161] [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: 11/11/2022] Open
Abstract
We have used derivatized antisense oligodeoxynucleotides both in vitro and in vivo specifically to inhibit translation of the activated human oncogene Ha-ras. The oligonucleotides (5'-CCACACCGA-3') were targeted to a region of Ha-ras mRNA including the point mutation G----T at the 12th codon which leads to a Gly----Val substitution in the ras p21 protein. They were linked to an intercalating agent and/or to a hydrophobic tail, both to increase their affinity for their mRNA target and to enhance their uptake by tumor cells. A cell-free translation system was used to demonstrate an RNase H-dependent specific inhibition of activated ras protein synthesis. 50% inhibition was observed at a concentration of 0.5 microM of the most efficient oligonucleotide (5'-substitution with an acridine derivative and 3'-substitution by a dodecanol chain). This inhibitory effect stems from a point mutation-sensitive cleavage of the mRNA and it mirrors the growth inhibition obtained with T24 bladder carcinoma cells, which carry activated Ha-ras. The proliferation of HBL100 cells (non tumorigenic human mammary cell line) which carry two copies of normal Ha-ras was unaffected. This study shows that it is possible to design antisense agents that will inactivate the mutated oncogene but not the protooncogene which is generally essential to cell survival.
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Affiliation(s)
- T Saison-Behmoaras
- Laboratoire de Biophysique, INSERM U.201-CNRS UA.481, Muséum National d'Histoire Naturelle, Paris, France
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Rey I, Schweighoffer F, Barlat I, Camonis J, Boy-Marcotte E, Guilbaud R, Jacquet M, Tocque B. The COOH-domain of the product of the Saccharomyces cerevisiae SCD25 gene elicits activation of p21-ras proteins in mammalian cells. Oncogene 1991; 6:347-9. [PMID: 2000228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The evidence presented here indicates that the domain containing the COOH-terminal part of the Saccharomyces cerevisiae SCD25 gene product (C-domain), which is homologous to the COOH-terminal part of CDC25 protein, can elicit activation of mammalian ras proteins in CHO cells. Transfection of expression vectors carrying the C-domain of SCD25, but not of CDC25, promotes the GTP-bound form of ras proteins as determined by analysis of the guanine nucleotides bound to ras proteins immunoprecipitated by Y13-259 mAb, and enhances transcription of a HIV-LTR-CAT construct. This is the first demonstration of the activation of ras proteins by transfection of a single heterologous gene.
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Affiliation(s)
- I Rey
- CRVA/IBV, Rhone-Poulenc Sante, Vitry sur Seine, France
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Abstract
Over the past 10 years, more than 40 potentially oncogenic genes, termed protooncogenes, have been identified in the human genome. Little is known of the physiological role of the proteins encoded by these genes, but they seem to be involved in the reception and transmission of hormonal and other environmental information from the cell membrane to the nucleus. These proteins may acquire transforming properties when over-expressed or if structurally altered following partial deletions or point mutations. Cytogenetic analysis shows loss of genetic material from specific chromosomal loci in many human tumors, suggesting that the absence of a functional gene at these loci may permit tumor development. The genes involved have been termed "anti-oncogenes". Understanding the control mechanisms of cell proliferation is essential in order to understand how cancer cells escape from this control. To this end, numerous oncogenes have been cloned, permitting the production of modified forms of oncogenic proteins and identification of the regions essential for their biological activity. Availability of large amounts of protein also allows the production of specific antibody which can be used to verify whether blockage of a given protein results in reversion of the transformed phenotype. If it can be shown that the expression of an oncogenic protein is essential for transformation, it should be possible to search for molecules that inhibit its action or which mimic the effects of an anti-oncogene. This type of research is already well advanced for the oncogenic ras proteins, and models have been established that permit both screening for potential inhibitors and design of specific antagonists.
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Affiliation(s)
- I Rey
- Rhône-Poulenc Santé, Centre de Recherche de Vitry, Vitry-sur-Seine, France
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Rey I, Soubigou P, Debussche L, David C, Morgat A, Bost PE, Mayaux JF, Tocque B. Antibodies to synthetic peptide from the residue 33 to 42 domain of c-Ha-ras p21 block reconstitution of the protein with different effectors. Mol Cell Biol 1989; 9:3904-10. [PMID: 2550807 PMCID: PMC362452 DOI: 10.1128/mcb.9.9.3904-3910.1989] [Citation(s) in RCA: 6] [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] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Residues 32 to 40, which are conserved among ras proteins from different species, are likely to participate in interactions with the p21 effector system. With the goal of understanding the structural basis of the regulatory functions of c-Ha-ras p21, we produced rabbit antisera against a synthetic peptide corresponding to amino acids 33 to 42 of the protein. The affinity-purified antibodies interacted specifically with p21 and with the antigenic peptide. The epitope recognized by the antibodies appeared to be centered on threonine 35. The antibodies inhibited both in vitro p21-induced production of cyclic AMP in detergent extracts of RAS-defective yeast membranes and GAP-stimulated GTPase activity. However, monoclonal anti-ras antibodies Y13-259 and Y13-238 were not capable of specifically inhibiting interactions of p21 with these two putative effector proteins. The apparent inhibitory effect of Y13-259 on stimulation of p21 by GAP was due to a greatly reduced rate of exchange of nucleotides in the binding pocket of the protein. These findings provide additional support for the essential role of the residue 32 to 40 domain as the true effector site and further evidence of the involvement of GAP as a cellular effector of ras proteins.
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Affiliation(s)
- I Rey
- Rhône-Poulenc Santé Centre de Recherche de Vitry, Vitry Sur Seine, France
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Abstract
Pertussis toxin (PT), which blocks the activity of several G-proteins, has been found to exert a marked inhibitory effect on the DNA synthesis induced in 3T3 cells by serum or growth factors. 3T3 cells transformed with human c-ras oncogenes (Ha-ras, Ki-ras, N-ras) or with src, an oncogene coding for a protein kinase, have lost sensitivity to growth control by PT, even though substrates for PT can still be ADP-ribosylated in vivo. In contrast, 3T3 cells transformed with the SV40 virus behave like normal untransformed cells with respect to the ability of PT to decrease their growth rate. Oncogenes can thus likely be classified either as 'responders' or 'non-responders' to PT.
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Affiliation(s)
- I Rey
- Rhône-Poulenc Santé, Centre de Recherches de Vitry, Vitry-sur-Seine, France
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Grégoriades S, Zen Ruffinen W, Rey I. [Three cases of postoperative hemorrhage]. Cah Anesthesiol 1985; 33:715-7. [PMID: 3879746] [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: 01/07/2023]
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Abstract
The first menstrual cycles after menarche are irregular and anovulatory. To determine whether these cycles reflect immature pituitary responsiveness to gonadotropin-releasing hormone (GnRH) in relationship to ovarian steroid secretion, we measured basal plasma estradiol (E2), progesterone (P), and gonadotropins as well as LH and FSH responses to GnRH in 90 healthy girls during the first 5 yr after menarche. During the first year postmenarche, sex steroids, basal gonadotropins, and responses to GnRH had not yet reached adult values. During the second year, the increase in E2 was accompanied by a higher secretion of gonadotropins, both basally and in response to GnRH, which was similar to that observed in control adult women during both phases of the menstrual cycle, although P remained low. From the third to the fifth postmenarchal years, there was a progressive increase in the luteal LH and FSH responses to GnRH, resulting in significantly higher responses than in adult controls. Despite the progressive increase in sex steroids there was still a low percentage of ovulatory cycles over the 5 postmenarchal yr (0-63%). When the data were classified according to luteal P levels, it was found that anovulatory cycles (P less than 0.9 ng/ml) with normal E2 levels (100 pg/ml) resulted in exaggerated responses to GnRH, while in ovulatory cycles with P levels greater than 10 ng/ml and normal E2 concentrations, a lower response was observed, suggesting that high concentrations of P exerted a negative feedback on LH and FSH secretion. In contrast, the association of lower E2 (less than 100 ng/ml) and P (less than 5 ng/ml) levels resulted in a synergistic positive action on gonadotropin secretion. These data extend to endogenous sex steroids the dose-dependent positive and negative actions on gonadotropin secretion previously demonstrated with exogenously administered steroids in women.
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Grandguillaume P, Rey I. [Gynecologic disorders in the prevention of juvenile diabetes]. Soz Praventivmed 1976; 21:155-6. [PMID: 997970 DOI: 10.1007/bf01994470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Repeated gynecological affections have been detected in 26 out of 30 diabetic children. Therefore, it is important to do gynecological examinations in diabetic children. In addition, during a systematic check out, an impaired glucose tolerance has been found in 7 out of 18 children who presented inflammatory and itching gynecological affections. These findings emphasize the importance of systematical gynecological examination in childhood and adolescence in preventive medicine.
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Bossart H, von Niederhäusern F, Rey I, Weihs D. pH sanguin, glycémie et lactacidémie chez la mere et l'enfant pendant et après Paccouchement normal. Gynecol Obstet Invest 1968. [DOI: 10.1159/000302471] [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: 11/19/2022]
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