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Rodriguez-Leor O, Toledano B, López-Palop R, Rivero F, Brugaletta S, Linares JA, Benito T, Carrillo P, Puigfel M, Cediel G, Sadaba M, Vaquerizo B, Rondán J, Gómez I, Alfonso F, Sáez R, Planas A, Lozano F, Hernández F, Sabaté M, Ruíz-Arroyo JR, Torres F, de la Torre Hernández JM, Gutiérrez E, Cid-Álvarez AB, Díez JL, Fernández L, Moreu J, Ojeda S, Cerrato P, Ruiz-Quevedo V, Sanchis J, Gómez-Menchero A, Ocaranza R, Mohandes M, Hernández JM, Alfageme MM, Aguiar P, López Mínguez JR, Pérez de Prado A. Changes in the treatment strategy following intracoronary pressure wire in a contemporaneous real-life cohort of patients with intermediate coronary stenosis. Results from a nationwide registry. Cardiovasc Revasc Med 2023; 51:55-64. [PMID: 36822975 DOI: 10.1016/j.carrev.2023.01.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 12/27/2022] [Accepted: 01/30/2023] [Indexed: 02/05/2023]
Abstract
BACKGROUND Intracoronary pressure wire is useful to guide revascularization in patients with coronary artery disease. AIMS To evaluate changes in diagnosis (coronary artery disease extent), treatment strategy and clinical results after intracoronary pressure wire study in real-life patients with intermediate coronary artery stenosis. METHODS Observational, prospective and multicenter registry of patients in whom pressure wire was performed. The extent of coronary artery disease and the treatment strategy based on clinical and angiographic criteria were recorded before and after intracoronary pressure wire guidance. 12-month incidence of MACE (cardiovascular death, non-fatal myocardial infarction or new revascularization of the target lesion) was assessed. RESULTS 1414 patients with 1781 lesions were included. Complications related to the procedure were reported in 42 patients (3.0 %). The extent of coronary artery disease changed in 771 patients (54.5 %). There was a change in treatment strategy in 779 patients (55.1 %) (18.0 % if medical treatment; 68.8 % if PCI; 58.9 % if surgery (p < 0.001 for PCI vs medical treatment; p = 0.041 for PCI vs CABG; p < 0.001 for medical treatment vs CABG)). In patients with PCI as the initial strategy, the change in strategy was associated with a lower rate of MACE (4.6 % vs 8.2 %, p = 0.034). CONCLUSIONS The use of intracoronary pressure wire was safe and led to the reclassification of the extent of coronary disease and change in the treatment strategy in more than half of the cases, especially in patients with PCI as initial treatment.
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Affiliation(s)
- Oriol Rodriguez-Leor
- Institut del Cor, Hospital Universitari Germans Trias i Pujol, Badalona, Spain; CIBER de Enfermedades CardioVasculares (CIBERCV) Instituto de Salud Carlos III, Madrid, Spain; Institut de Recerca en Ciències de la Salut Germans Trias i Pujol, Badalona, Spain.
| | - Beatriz Toledano
- Institut del Cor, Hospital Universitari Germans Trias i Pujol, Badalona, Spain
| | | | - Fernando Rivero
- Servicio de Cardiología, Hospital de la Princesa, Madrid, Spain
| | - Salvatore Brugaletta
- Servicio de Cardiología, Hospital Clínic i Provincial de Barcelona, Barcelona, Spain
| | | | - Tomás Benito
- Servicio de Cardiología, Hospital de León, León, Spain
| | - Pilar Carrillo
- Servicio de Cardiología, Hospital de Sant Joan, Alacant, Spain
| | - Martí Puigfel
- Servicio de Cardiología, Hospital Josep Trueta de Girona, Girona, Spain
| | - German Cediel
- Institut del Cor, Hospital Universitari Germans Trias i Pujol, Badalona, Spain
| | - Mario Sadaba
- Servicio de Cardiología, Hospital de Galdakao, Galdakao, Spain
| | | | - Juan Rondán
- Servicio de Cardiología, Hospital de Cabueñes, Gijón, Spain
| | - Iván Gómez
- Servicio de Cardiología, Hospital Universitario 12 de Octubre, Madrid, Spain
| | | | - Roberto Sáez
- Servicio de Cardiología, Hospital de Basurto, Basurto, Spain
| | - Ana Planas
- Servicio de Cardiología, Hospital de Castellón, Castellón de la Plana, Spain
| | - Fernando Lozano
- Servicio de Cardiología, Hospital de Ciudad Real, Ciudad Real, Spain
| | - Felipe Hernández
- Servicio de Cardiología, Clínica Universitaria de Navarra, Madrid, Spain
| | - Manel Sabaté
- Servicio de Cardiología, Hospital Clínic i Provincial de Barcelona, Barcelona, Spain
| | | | | | | | - Enrique Gutiérrez
- Servicio de Cardiología, Hospital Universitario Gregorio Marañón, Madrid, Spain
| | - Ana Belén Cid-Álvarez
- Servicio de Cardiología, Hospital Clínico de Santiago, Santiago de Compostela, Spain
| | - José Luís Díez
- Servicio de Cardiología, Hospital Universitari de la Fe, Valencia, Spain
| | - Luis Fernández
- Servicio de Cardiología, Hospital de Cruces, Barakaldo, Spain
| | - José Moreu
- Servicio de Cardiología, Hospital de Toledo, Toledo, Spain
| | - Soledad Ojeda
- Servicio de Cardiología, Hospital Universitario Reina Sofía, Córdoba, Spain
| | - Pablo Cerrato
- Servicio de Cardiología, Hospital de Mérida, Mérida, Spain
| | | | - Juan Sanchis
- Servicio de Cardiología, Hospital Clínico Universitario de Valencia, Valencia, Spain
| | | | | | - Mohsen Mohandes
- Servicio de Cardiología, Hospital Universitari Joan XXIII, Tarragona, Spain
| | | | | | - Pablo Aguiar
- Servicio de Cardiología, Hospital San Pedro de Logroño, Logroño, Spain
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García-Olea A, Elorriaga A, Arregui A, Mendoza P, Andrés A, Sáez R. Premature acute myocardial infarction with ST segment elevation: a cohort study in the 2012-2022 decade. Arch Cardiol Mex 2023; 93:442-450. [PMID: 37972359 DOI: 10.24875/acm.22000278] [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: 12/08/2022] [Accepted: 03/14/2023] [Indexed: 11/19/2023] Open
Abstract
BACKGROUND AND PURPOSE Premature infarction has a high socioeconomic impact and we lack contemporary studies that analyze the characteristics associated with its development and evolution. MATERIAL AND METHODS In an observational study on a retrospective cohort of patients younger than 46 years old, who had suffered from an infarction from June 2012 to June 2022, sociodemographic characteristics, cardiovascular and toxic risk factors, infarction characteristics, SARS-CoV-2 infection and immunization data were investigated. Indeed, a one-year retrospective follow-up was performed through their electronic health record and results were compared with the ones reported in literature. RESULTS 12.1% of primary angioplasties corresponded to premature infarctions (103). Among classical risk factors, dyslipidemia and overweight stood out, while hypertension and diabetes incidence was significantly lower than the one reported in older population. The consumption of tobacco and other drugs (especially cannabis and cocaine) was higher than that reported at older ages. Twenty-seven patients had a family history of ischemic cardiopathy or sudden cardiac death, 27.2% (28) had complications during admission and mortality was 4.9% (5). No significant differences were identified between the patients who debuted with an event before or after the pandemic, except for a tendency to smoking cessation. CONCLUSIONS Premature infarction is a rising pathology with considerable morbidity and mortality. Raising awareness about toxic habits and prevention of the classical risk factors are priority tasks in this setting.
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Affiliation(s)
| | | | | | | | - Abel Andrés
- Sección de Cardiología Intensiva
- Sección de Hemodinámica. Hospital Universitario Basurto, Bilbao, España
| | - Roberto Sáez
- Sección de Hemodinámica. Hospital Universitario Basurto, Bilbao, España
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Rodríguez-Leor O, Cid-Álvarez B, Pérez de Prado A, Rossello X, Ojeda S, Serrador A, López-Palop R, Martín-Moreiras J, Rumoroso JR, Cequier Á, Ibáñez B, Cruz-González I, Romaguera R, Moreno R, Villa M, Ruíz-Salmerón R, Molano F, Sánchez C, Muñoz-García E, Íñigo L, Herrador J, Gómez-Menchero A, Gómez-Menchero A, Caballero J, Ojeda S, Cárdenas M, Gheorghe L, Oneto J, Morales F, Valencia F, Ruíz JR, Diarte JA, Avanzas P, Rondán J, Peral V, Pernasetti LV, Hernández J, Bosa F, Lorenzo PLM, Jiménez F, Hernández JMDLT, Jiménez-Mazuecos J, Lozano F, Moreu J, Novo E, Robles J, Moreiras JM, Fernández-Vázquez F, Amat-Santos IJ, Gómez-Hospital JA, García-Picart J, Blanco BGD, Regueiro A, Carrillo-Suárez X, Tizón H, Mohandes M, Casanova J, Agudelo-Montañez V, Muñoz JF, Franco J, Del Castillo R, Salinas P, Elizaga J, Sarnago F, Jiménez-Valero S, Rivero F, Oteo JF, Alegría-Barrero E, Sánchez-Recalde Á, Ruíz V, Pinar E, Pinar E, Planas A, Ledesma BL, Berenguer A, Fernández-Cisnal A, Aguar P, Pomar F, Jerez M, Torres F, García R, Frutos A, Nodar JMR, García K, Sáez R, Torres A, Tellería M, Sadaba M, Mínguez JRL, Merchán JCR, Portales J, Trillo R, Aldama G, Fernández S, Santás M, Pérez MPP. Impact of COVID-19 on ST-segment elevation myocardial infarction care. The Spanish experience. ACTA ACUST UNITED AC 2020; 73:994-1002. [PMID: 32917566 PMCID: PMC7834732 DOI: 10.1016/j.rec.2020.08.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 07/28/2020] [Indexed: 12/29/2022]
Abstract
Introduction and objectives The COVID-19 outbreak has had an unclear impact on the treatment and outcomes of patients with ST-segment elevation myocardial infarction (STEMI). The aim of this study was to assess changes in STEMI management during the COVID-19 outbreak. Methods Using a multicenter, nationwide, retrospective, observational registry of consecutive patients who were managed in 75 specific STEMI care centers in Spain, we compared patient and procedural characteristics and in-hospital outcomes in 2 different cohorts with 30-day follow-up according to whether the patients had been treated before or after COVID-19. Results Suspected STEMI patients treated in STEMI networks decreased by 27.6% and patients with confirmed STEMI fell from 1305 to 1009 (22.7%). There were no differences in reperfusion strategy (> 94% treated with primary percutaneous coronary intervention in both cohorts). Patients treated with primary percutaneous coronary intervention during the COVID-19 outbreak had a longer ischemic time (233 [150-375] vs 200 [140-332] minutes, P < .001) but showed no differences in the time from first medical contact to reperfusion. In-hospital mortality was higher during COVID-19 (7.5% vs 5.1%; unadjusted OR, 1.50; 95%CI, 1.07-2.11; P < .001); this association remained after adjustment for confounders (risk-adjusted OR, 1.88; 95%CI, 1.12-3.14; P = .017). In the 2020 cohort, there was a 6.3% incidence of confirmed SARS-CoV-2 infection during hospitalization. Conclusions The number of STEMI patients treated during the current COVID-19 outbreak fell vs the previous year and there was an increase in the median time from symptom onset to reperfusion and a significant 2-fold increase in the rate of in-hospital mortality. No changes in reperfusion strategy were detected, with primary percutaneous coronary intervention performed for the vast majority of patients. The co-existence of STEMI and SARS-CoV-2 infection was relatively infrequent.
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Affiliation(s)
- Oriol Rodríguez-Leor
- Institut del Cor, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, Spain; Centro de Investigación Biomédica en Red Enfermedades Cardiovaculares (CIBERCV), Instituto de Salud Carlos III, Madrid, Spain; Institut de Recerca en Ciències de la Salut Germans Trias i Pujol, Badalona, Barcelona, Spain.
| | - Belén Cid-Álvarez
- Servicio de Cardiología, Hospital Clínico de Santiago de Compostela, Santiago de Compostela, A Coruña, Spain
| | | | - Xavier Rossello
- Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain; Servicio de Cardiología, Institut d'Investigació Sanitària de les Illes Balears (IdISBa), Hospital Universitari Son Espases, Palma de Mallorca, Islas Baleares, Spain; Centro de Investigación Biomédica en Red Enfermedades Cardiovaculares (CIBERCV), Instituto de Salud Carlos III, Madrid, Spain
| | - Soledad Ojeda
- Servicio de Cardiología, Hospital Universitario Reina Sofía, Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Universidad de Córdoba, Córdoba, Spain
| | - Ana Serrador
- Servicio de Cardiología, Hospital Clínico de Valladolid, Valladolid, Spain; Centro de Investigación Biomédica en Red Enfermedades Cardiovaculares (CIBERCV), Instituto de Salud Carlos III, Madrid, Spain
| | - Ramón López-Palop
- Servicio de Cardiología, Hospital Virgen de la Arrixaca, El Palmar, Murcia, Spain
| | - Javier Martín-Moreiras
- Servicio de Cardiología, Hospital Universitario de Salamanca, Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain; Centro de Investigación Biomédica en Red Enfermedades Cardiovaculares (CIBERCV), Instituto de Salud Carlos III, Madrid, Spain
| | - José Ramón Rumoroso
- Servicio de Cardiología, Hospital de Galdakao-Usansolo, Galdakao, Vizcaya, Spain
| | - Ángel Cequier
- Servicio de Cardiología, Hospital de Bellvitge-Instituto de Investigación Biomédica de Bellvitge (IDIBELL), Universitat de Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Borja Ibáñez
- Centro de Investigación Biomédica en Red Enfermedades Cardiovaculares (CIBERCV), Instituto de Salud Carlos III, Madrid, Spain; Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain; Servicio de Cardiología, Hospital Universitario IIS-Fundación Jiménez Díaz, Madrid, Spain
| | - Ignacio Cruz-González
- Servicio de Cardiología, Hospital Universitario de Salamanca, Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain; Centro de Investigación Biomédica en Red Enfermedades Cardiovaculares (CIBERCV), Instituto de Salud Carlos III, Madrid, Spain
| | - Rafael Romaguera
- Servicio de Cardiología, Hospital de Bellvitge-Instituto de Investigación Biomédica de Bellvitge (IDIBELL), Universitat de Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Raúl Moreno
- Servicio de Cardiología, Hospital Universitario La Paz, Madrid, Spain; Centro de Investigación Biomédica en Red Enfermedades Cardiovaculares (CIBERCV), Instituto de Salud Carlos III, Madrid, Spain
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Jesús Oneto
- Hospital Universitario de Jerez de la Frontera
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Juan Franco
- Hospital Universitario Fundación Jiménez Díaz
| | | | - Pablo Salinas
- Hospital Clínico San Carlos y Hospital Príncipe de Asturias
| | | | | | | | | | | | | | | | | | | | - Eduardo Pinar
- Luciano Consuegra-Sánchez, Hospital Universitario Santa Lucía de Cartagena
| | - Ana Planas
- Hospital General Universitario de Castellón
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Ramiro Trillo
- Hospital Clínico Universitario Santiago de Compostela
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Rubilar M, Morales E, Sáez R, Acevedo F, Palma B, Villarroel M, Shene C. Polyphenolic fractions improve the oxidative stability of microencapsulated linseed oil. EUR J LIPID SCI TECH 2012. [DOI: 10.1002/ejlt.201100230] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Monge MA, Bernini MC, Platero-Prats AE, Snejko N, Gutierrez-Puebla E, Labrador A, Romero J, Sáez R. Novel three-dimensional fluorinated MOFs: structure, topology and magnetic properties. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311090684] [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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Álvarez-Valero AM, Pérez-López R, Matos J, Capitán MA, Nieto JM, Sáez R, Delgado J, Caraballo M. Potential environmental impact at São Domingos mining district (Iberian Pyrite Belt, SW Iberian Peninsula): evidence from a chemical and mineralogical characterization. ACTA ACUST UNITED AC 2007. [DOI: 10.1007/s00254-007-1131-x] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ormaetxe JM, Sáez R, Arkotxa MF, Martinez-Alday JD. Catecholaminergic polymorphic ventricular tachycardia detected by an insertable loop recorder in a pediatric patient with exercise syncopal episodes. Pediatr Cardiol 2004; 25:693-5. [PMID: 15185051 DOI: 10.1007/s00246-004-0687-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Syncope is a common clinical problem that occurs at all ages and is particularly prevalent in childhood and adolescence. The evaluation of syncope is best approached using the history and physical examination, electrocardiogram and risk stratification to guide further diagnostic tests. Syncope associated with exercise or exertion must be considered dangerous, it can be a predictor of sudden cardiac death and therefore it must be taken seriously. The insertable loop recorder has been proven to be useful in the diagnosis of recurrent syncope in adult patients in whom the cause of the syncope cannot be found by other noninvasive means. We report the first known case of cathecolaminergic polymorphic ventricular tachycardia detected by an insertable loop recorder in a 5-year-old boy with a syncopal history and no structural heart disease.
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Affiliation(s)
- J M Ormaetxe
- Clinical Electrophysiology Laboratory, Servicio de Cardiologia, Hospital de Basurto, Avda. Montevideo, 18, 48013, Bilbao, Spain.
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Garre C, Mercader J, García B, Sáez R, Albaladejo A, Baños R. [Segmental Caroli's disease]. Rev Esp Enferm Dig 2002; 94:504-5. [PMID: 12486859] [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: 02/28/2023]
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de Granda-Orive JI, Escobar JA, Gutiérrez T, Albiach JM, Sáez R, Rodero A, Gallego V, Peña T, Herrera A. Smoking-related attitudes, characteristics, and opinions in a group of young men with asthma. Mil Med 2001; 166:959-65. [PMID: 11725324] [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: 02/22/2023] Open
Abstract
UNLABELLED The objective of this study was to examine the attitudes, characteristics, and opinions about smoking of a group of young asthmatic men. POPULATION AND METHODS An anonymous, personal questionnaire was administered to 611 young male volunteers who had been diagnosed with asthma (according to the National Heart, Lung, and Blood Institute/World Health Organization Global Initiative for Asthma, 1995) in the respiratory disease and allergy clinics of the Burgos Military Hospital (Spain). This questionnaire contained items related to personal information, asthma characteristics, opinions about smoking, and information related to smoking habits. RESULTS Six hundred patients with asthma completed the questionnaire. All were men, mean age 20.16 +/- 3.03 years; 189 (31.5%) were smokers and 16 (2.5%) were ex-smokers. Mean age at onset of regular smoking was 16.46 +/- 2 years. Sixty-five percent (65.07%) smoked fewer than 10 cigarettes per day. Most of the smoking asthmatics had mild asthma (58.9%). Eighty-eight percent (88.3%) had moderate dependence. Many of the smoking asthmatics were contemplating stopping smoking (54%), and 59% had tried before to stop. Concern about health was the main reason given for stopping smoking. Asthmatics who smoked had a higher percentage of smokers among family members, friends, and colleagues than nonsmoking asthmatics. Attitudes toward smoking were more permissive among smoking asthmatics. Only 36.64% of the total had received information about tobacco previously. In the sample group, 7% claimed that they did not smoke but their carbon monoxide concentration in exhaled air was 10 ppm or higher. CONCLUSIONS There were no differences in the onset of the smoking habit between asthmatic and nonasthmatic young people. A large percentage of the smoking asthmatics were considering smoking cessation, motivated mainly by their asthma condition. The group as a whole had little previous information about tobacco.
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Affiliation(s)
- J I de Granda-Orive
- Department of Respiratory Disease, Gómez Ulla Military Hospital, Madrid, Spain
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Castiñeiras A, Vidal MCF, Romero J, Sáez R, Matilla A, Niclós J, Tercero JM. Synthesis, Characterization, and Magnetic Behaviour of Dinuclear Nickel(II) Complexes of N,N′-Substituted Dithiooxamides derived from α-Amino Acids. Z Anorg Allg Chem 2001. [DOI: 10.1002/1521-3749(200107)627:7<1553::aid-zaac1553>3.0.co;2-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Llansola M, Sáez R, Felipo V. NMDA-induced phosphorylation of the microtubule-associated protein MAP-2 is mediated by activation of nitric oxide synthase and MAP kinase. Eur J Neurosci 2001; 13:1283-91. [PMID: 11298788 DOI: 10.1046/j.0953-816x.2001.01497.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Microtubule-associated protein MAP-2 is a neuronal phosphoprotein which modulates microtubule stability and spatial organization of signal transduction pathways. The functions of MAP-2 are modulated by phosphorylation. We studied the modulation of MAP-2 phosphorylation using the N-methyl- D-aspartate (NMDA) type of glutamate receptors and the signal transduction pathways mediating this modulation in primary cultures of rat cerebellar neurons. NMDA induced a rapid increase (330% of basal at 5 min) in MAP-2 phosphorylation which was not prevented by KN-62, indicating that it is not mediated by activation of Ca-calmodulin-dependent protein kinase. NMDA-induced phosphorylation of MAP-2 was inhibited by the nitric oxide synthase inhibitors nitroarginine and 7-nitroindazole and by PD098059 (an inhibitor of MAP kinase kinase), but was only slightly reduced by calphostin C or U-73122, inhibitors of protein kinase C and of phospholipase C, respectively. This indicates that the main pathway mediating NMDA-induced phosphorylation of MAP-2 is activation of nitric oxide synthase and subsequent activation of MAP kinase. We show that activation of NMDA receptors induces an activation of MAP kinase which is prevented by nitroarginine. The nitric oxide-generating agent (+/-)-S-nitroso-N-acetylpenicillamine (SNAP) also induced activation of MAP kinase and increased phosphorylation of MAP-2. Other nitric oxide-generating agents (NOC-18 and NOR-3) also increased MAP-2 phosphorylation. The interplay between NMDA receptors-associated signal transduction pathways and MAP-2 may be involved in the modulation of neuronal responses to extracellular signals and in the regulation of neuronal function.
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Affiliation(s)
- M Llansola
- Laboratory of Neurobiology, Instituto de Investigaciones Citologicas, Fundación Valenciana de Investigaciones Biomédicas, Amadeo de Saboya, 4. 46010 Valencia, Spain
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Sáez R, Llansola M, Felipo V. Chronic exposure to ammonia alters pathways modulating phosphorylation of microtubule-associated protein 2 in cerebellar neurons in culture. J Neurochem 1999; 73:2555-62. [PMID: 10582618 DOI: 10.1046/j.1471-4159.1999.0732555.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Hyperammonemia is considered the main cause for the neurological alterations found in hepatic failure. However, the mechanisms by which high ammonia levels impair cerebral function are not well understood. It has been shown that chronic hyperammonemia impairs signal transduction pathways associated with NMDA receptors and also alters phosphorylation of some neuronal proteins. The aim of the present work was to analyze the effects of chronic exposure to ammonia on phosphorylation of microtubule-associated protein 2 (MAP-2) in intact neurons in culture and to assess whether modulation of MAP-2 phosphorylation by glutamate receptor-associated transduction pathways is altered in neurons chronically exposed to ammonia. It is shown that chronic exposure to ammonia increases basal phosphorylation of MAP-2 by approximately 70%. This effect seems to be due to a decreased tonic activation of NMDA receptors and of calcineurin. Chronic exposure to ammonia also alters the modulation of MAP-2 phosphorylation by NMDA receptors and metabotropic glutamate receptors. In neurons exposed to ammonia, treatment with NMDA for 30 min induced a significant decrease in phosphorylation of MAP-2. Activation of metabotropic glutamate receptors with (1S,3R)-1-aminocyclopentane-1,3-dicarboxylic acid significantly increased phosphorylation of MAP-2 in control neurons, whereas in neurons exposed to ammonia the response was the opposite, with 1-aminocyclopentane-1,3-dicarboxylic acid inducing a dephosphorylation of MAP-2. These results indicate that ammonia alters significantly signal transduction pathways associated with different types of glutamate receptors. This would lead therefore to significant alterations in glutamatergic neurotransmission, which would contribute to the neurological alterations found in hyperammonemia and in hepatic encephalopathy.
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Affiliation(s)
- R Sáez
- Laboratory of Neurobiology, Instituto de Investigaciones Citologicas, Fundación Valenciana de Investigaciones Biomédicas, Valencia, Spain
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Montoliu C, Llansola M, Sáez R, Yenes S, Messeguer A, Felipo V. Prevention of glutamate neurotoxicity in cultured neurons by 3,4-dihydro-6-hydroxy-7-methoxy-2,2-dimethyl-1(2H)-benzopyran (CR-6), a scavenger of nitric oxide. Biochem Pharmacol 1999; 58:255-61. [PMID: 10423166 DOI: 10.1016/s0006-2952(99)00104-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [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: 11/23/2022]
Abstract
Glutamate neurotoxicity in cerebellar neurons in culture is mediated by excessive production of nitric oxide (NO). We anticipated that 3,4-dihydro-6-hydroxy-7-methoxy-2,2-dimethyl-1(2H)-benzopyran (CR-6) could act as a scavenger of NO since it contains a position (C-5) highly activated towards nitration reaction. The aim of this work was to assess whether CR-6 acts as an NO scavenger and prevents glutamate neurotoxicity in cultures of cerebellar neurons. It was shown that CR-6 reduced, in a dose-dependent manner, glutamate-induced formation of cGMP (EC50 approximately 15 microM) and prevented glutamate neurotoxicity. The protection was approximately 50% at 3-10 microM and nearly complete at 100 microM. CR-6 did not prevent glutamate-induced activation of NO synthase, but interfered with the glutamate-NO-cGMP pathway at a later step. CR-6 reduced the formation of cGMP induced by S-nitroso-N-acetylpenicillamine (SNAP), an NO-generating agent, indicating that CR-6 acts as a scavenger of NO in cultured neurons. This was further supported by experiments showing that in neurons treated with CR-6 and glutamate, the 5-nitro derivative of CR-6 was formed, as determined by GC-MS analyses. Moreover, in vitro incubation of CR-6 with SNAP also produced the 5-nitroderivative, thus confirming that CR-6 directly reacts with NO. The results reported indicate that CR-6 acts as an NO scavenger in neurons and prevents glutamate neurotoxicity.
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Affiliation(s)
- C Montoliu
- Instituto de Investigaciones Citologicas de la Fundación Valenciana de Investigaciones Biomedicas, Spain
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Hermenegildo C, Sáez R, Minoia C, Manzo L, Felipo V. Chronic exposure to aluminium impairs the glutamate-nitric oxide-cyclic GMP pathway in the rat in vivo. Neurochem Int 1999; 34:245-53. [PMID: 10355491 DOI: 10.1016/s0197-0186(99)00010-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Aluminium is neurotoxic and is considered a possible etiologic factor in Alzheimer's disease, dialysis syndrome and other neurological disorders. The molecular mechanism of aluminium-induced impairment of neurological functions remains unclear. We showed that aluminium impairs the glutamate-nitric oxide-cGMP pathway in cultured neurons. The aim of this work was to assess by in vivo brain microdialysis whether chronic administration of aluminium in the drinking water (2.5% aluminium sulfate) also impairs the glutamate-nitric oxide-cGMP pathway in the cerebellum of rats in vivo. Chronic exposure to aluminium reduced NMDA-induced increase of extracellular cGMP by ca 50%. The increase in extracellular cGMP induced by the nitric oxide generating agent S-nitroso-N-acetylpenicillamine was higher (240%) in rats treated with aluminium than in controls. Immunoblotting experiments showed that aluminium reduced the cerebellar content of calmodulin and nitric oxide synthase by 34 and 15%, respectively. Basal activity of soluble guanylate cyclase was decreased by 66% in aluminium-treated rats, while the activity after stimulation with S-nitroso-N-acetylpenicillamine was similar to controls. Basal cGMP in the cerebellar extracellular space was decreased by 50% in aluminium-treated rats. These results indicate that chronic exposure to aluminium reduces the basal activity of guanylate cyclase and impairs the glutamate-nitric oxide-cGMP pathway in the animal in vivo.
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Affiliation(s)
- C Hermenegildo
- Instituto de Investigaciones Citologicas, Fundación Valenciana de Investigaciones Biomédicas, Valencia, Spain
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Cucarella C, Montoliu C, Hermenegildo C, Sáez R, Manzo L, Miñana MD, Felipo V. Chronic exposure to aluminum impairs neuronal glutamate-nitric oxide-cyclic GMP pathway. J Neurochem 1998; 70:1609-14. [PMID: 9580158 DOI: 10.1046/j.1471-4159.1998.70041609.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Humans are exposed to aluminum from environmental sources and therapeutic treatments. However, aluminum is neurotoxic and is considered a possible etiologic factor in Alzheimer's disease and other neurological disorders. The molecular mechanism of aluminum neurotoxicity is not understood. We tested the effects of aluminum on the glutamate-nitric oxide-cyclic GMP pathway in cultured neurons. Neurons were exposed to 50 microM aluminum in culture medium for short-term (4 h) or long-term (8-14 days) periods, or rats were prenatally exposed, i.e., 3.7% aluminum sulfate in the drinking water, during gestation. Chronic (but not short-term) exposure of neurons to aluminum decreased glutamate-induced activation of nitric oxide synthase by 38% and the formation of cyclic GMP by 77%. The formation of cyclic GMP induced by the nitric oxide-generating agent S-nitroso-N-acetylpenicillamine was reduced by 33%. In neurons from rats prenatally exposed to aluminum but not exposed to it during culture, glutamate-induced formation of cyclic GMP was inhibited by 81%, and activation of nitric oxide synthase was decreased by 85%. The formation of cyclic GMP induced by S-nitroso-N-acetylpenicillamine was not affected. These results indicate that chronic exposure to aluminum impairs glutamate-induced activation of nitric oxide synthase and nitric oxide-induced activation of guanylate cyclase. Impairment of the glutamate-nitric oxide-cyclic GMP pathway in neurons may contribute to aluminum neurotoxicity.
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Affiliation(s)
- C Cucarella
- Instituto de Investigaciones Citológicas, Fundación Valenciana de Investigaciones Biomedicas, Valencia, Spain
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Castillo-Taucher S, Beca JP, Sáez R, Geldres V. Balanced pericentric inversion 8(p23q13) in a child with rhizomelic chondrodysplasia punctata and his mother. Clin Genet 1991; 40:247-8. [PMID: 1773541 DOI: 10.1111/j.1399-0004.1991.tb03086.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Sáez R, Burgal M, Renau-Piqueras J, Marqués A, Guerri C. Evolution of several cytoskeletal proteins of astrocytes in primary culture: effect of prenatal alcohol exposure. Neurochem Res 1991; 16:737-47. [PMID: 1944762 DOI: 10.1007/bf00965682] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In the present work we have analyzed, using immunoblotting and immunofluorescence techniques, the evolution of several cytoskeletal proteins during the development of astrocytes in primary culture. The effect of prenatal exposure to alcohol on these proteins was also evaluated. Microtubular protein alpha-tubulin decreased approximately 47% from 4 to 7 days after which its content remained practically constant. Immunofluorescence studies showed also that the content of alpha-tubulin was greater at day 4 of culture. This increase in fluorescence was coincident with the presence of globular particles which were found in interphase astrocytes and stained with both anti alpha- and anti-beta tubulin. These structures appeared only in proliferating cells. Glial fibrillary acidic protein (GFAP) and vimentin were analyzed as intermediate filament (IF) proteins. GFAP, in cytoskeletal preparations, increased regularly for 14 days followed by a decrease to day 21. In contrast, vimentin showed a progressive increase throughout the entire culture period. Fluorescence studies revealed some differences between the IF distribution patterns of GFAP and vimentin. In astrocytes obtained from rats prenatally exposed to ethanol, decreases in the amounts of all the cytoskeletal proteins studied were found during the entire culture period. In these cells a striking disorganization of cytoskeleton was also observed. The alcohol-induced decrease of GFAP in cultured astrocytes was also found when this protein was studied in preparations from whole brain developed "in vivo".
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Affiliation(s)
- R Sáez
- Instituto Investigaciones Citológicas de la Caja de Ahorros de Valencia (Centro Asociado del CSIC), Valencia, Spain
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Guerri C, Sáez R, Sancho-Tello M, Martin de Aquilera E, Renau-Piqueras J. Ethanol alters astrocyte development: a study of critical periods using primary cultures. Neurochem Res 1990; 15:559-65. [PMID: 2370949 DOI: 10.1007/bf00966217] [Citation(s) in RCA: 75] [Impact Index Per Article: 2.2] [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: 12/31/2022]
Abstract
Using astrocytes obtained from 21-day-old rat fetuses, in primary culture, we have analyzed the effect of prenatal alcohol consumption on DNA and protein synthesis of astrocytes during their development. The variation in sensitivity of astrocytes to ethanol "in vitro" during the proliferation and maturation periods was also assessed. Control astrocytes showed peaks of DNA and protein synthesis at 8 and 15 days, respectively. A significant decrease in both DNA and protein synthesis was found in astrocytes from fetuses prenatally exposed to ethanol. This effect on DNA synthesis was also observed when control astrocytes were exposed to ethanol (100 mM) "in vitro" during the entire culture period. The effects on astrocytes of short term (48h) exposure to ethanol during the proliferation or differentiation periods on the above mentioned parameters and on the cell cycle as well as the possible recovery from these effects were also evaluated. Decreases in DNA and protein synthesis were found in both periods. However, DNA synthesis and content were more affected in astrocytes exposed to ethanol during the proliferation period. This effect correlates with an accumulation of cells in the G0/G1 phase of the cell cycle. On the other hand, when cells exposed to ethanol were cultured in alcohol-free medium to assess recovery, only cells exposed to ethanol during days 4 to 6 still showed DNA ethanol-induced effects at 21 days. In conclusion, our results show that ethanol consumption during gestation induces serious damage to cortical astrocyte progenitor cells.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- C Guerri
- Instituto de Investigaciones Citologicas, Valencia, Spain
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Abstract
Triton X-100, sodium dodecylsulphate, sodium cholate, and beta-octylglucoside increase the size of sonicated, but not of unsonicated, phospholipid vesicles above the Tc gel to liquid-crystalline transition temperature. Lysophosphatidylcholine or glyceryl monooleate do not increase liposome size under these circumstances. The observed phenomenon of vesicle growth is virtually unaffected by phospholipid composition, surface potential, calcium ions, EDTA, or albumin. The presence of cholesterol makes the vesicles more susceptible to detergent-induced growth. The presence of detergents, even at concentrations much lower than required to observe any increase in vesicle size, favors the liberation of vesicle contents. These results may have implications concerning membrane fusion as well as the reconstitution of membrane proteins in the presence of detergents.
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Alonso A, Prado A, Rial E, Sáez R, Valpuesta JM. Constancy of liver lipid composition in two genera of toads after a short-term temperature acclimation. Rev Esp Fisiol 1981; 37:57-64. [PMID: 7244328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The lipid and fatty acid composition of Bufo calamytes and Alytes obstetricans livers has been studied. Data for both species are similar, and resemble closely those published for Rana sculenta. Total lipids constitute 20-25% of the total liver dry weight; about one fifth of these are phospholipids; cholesterol makes up 1.7-2.2% of the total liver dry weight. The most abundant phospholipids are phosphatidylcholine and phosphatidylethanolamine. The various lipid cases differ in their fatty acid composition: neutral lipids contain high proportions of palmitoleic and linoleic acids; phosphatidylcholine is characterized by its contents in palmitic acid, whereas cardiolipin contains polyunsaturated fatty acids. Thermal acclimation of toads for 96 h produces but few changes in liver lipid composition.
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