287 results on '"D. Benítez"'
Search Results
102. Metabolic Syndrome in Mexican Adolescents
- Author
-
Saby Camacho-Lopez, Maribel Pena-Corona, Guadalupe M. Zúñiga‐Torres, Fernando Farfan-Gonzalez, Roxana Valdés-Ramos, and Alejandra D. Benítez-Arciniega
- Subjects
Pediatrics ,medicine.medical_specialty ,Mexican adolescents ,business.industry ,Genetics ,Medicine ,Metabolic syndrome ,business ,medicine.disease ,Molecular Biology ,Biochemistry ,Biotechnology - Published
- 2006
- Full Text
- View/download PDF
103. Modified Differential Absolute Contrast using Thermal Quadrupoles for the Nondestructive Testing of Finite Thickness Specimens by Infrared Thermography
- Author
-
Clemente Ibarra-Castanedo, Hernán D. Benítez, Eduardo Caicedo, Abdelhakim Bendada, Humberto Loaiza, and Xavier Maldague
- Subjects
Materials science ,Diffusion equation ,business.industry ,Infrared ,Thermal diffusivity ,symbols.namesake ,Fourier transform ,Optics ,Nondestructive testing ,Thermography ,Thermal ,symbols ,business ,Finite thickness - Abstract
Infrared thermography is a nondestructive evaluation technique in which the specimen surface is thermally stimulated to produce a temperature difference between "sound" (free of defects) areas and eventual defective regions. It is well known that the thermographic methods based on the thermal contrast are strongly affected by non-uniform heating at the surface. Hence, thermal contrast-based results considerably depend on the chosen reference point. The differential absolute contrast (DAC) method was developed to eliminate the need of determining a reference point by defining the thermal contrast with respect to an "ideal" sound area. The DAC technique is based on the 1D solution of the Fourier diffusion equation for homogeneous and semi-infinite materials stimulated with a Dirac heat pulse. Although very useful at early times, this assumption considerably decreases DAC accuracy when the heat front approaches the sample rear face. We propose a modified DAC version by explicitly introducing the sample thickness using the thermal quadrupoles theory. We demonstrate that taking into account the sample thickness, the DAC validity range considerably extends for long times after excitation while preserving its performance for short times.
- Published
- 2006
- Full Text
- View/download PDF
104. Balance de siete años en pro de la conservación de razas iberoamericanas: red CYTED-XII-H
- Author
-
J.L. Vaca, D. Benítez, J. Ribamar, H. Anzola, F. Velazquez, D. Zambrano, A. Sierra, J.S. Hernandez, R. Perezgrovas, A. Medrano, A. Aluja, N. Gomez Urviola, C. Matos, F. Carcamo, G. Fernández, F. Pariacote, P.M. Toledo, J. V. Delgado, R. Martínez, M. A. Revidatti, A. Stemmer, J. R. B. Sereno, A. S. Mariante, M. N. Ribeiro, and M.E. Camacho
- Subjects
Cooperación internacional ,Utilización ,Conservación ,Utilización. Cooperación internacional ,Veterinaria ,Razas locales - Abstract
"En la presente comunicación se presenta un resumen de las actividades realizadas en los siete años de vida de la Red Iberoamericana sobre la Conservación de la Biodiversidad de los Animales Domésticos Locales para el Desarrollo Rural Sustentable. En esta red financiada por el programa CYTED participan 23 grupos de investigación de 13 países, con un total de 230 investigadores relacionados de una manera directa. Se describen los objetivos de la red, sus contenidos y sus logros, éstos últimos distribuidos en los siguientes aspectos: 1. Fortalecimiento del intercambio de conocimientos entre los grupos miembros y desde éstos al resto de la comunidad científica (simposios, talleres, seminarios, congresos). 2. Investigaciones conjuntas (libros, ponencias, artículos, etc). 3. Formación de alto nivel (cursos de posgrado, publicaciones pedagógicas, dirección de tesis doctorales y de maestría, estancias de corta duración). 4. Proyectos de investigación. Todo lo descrito se centra en la caracterización morfológica, productiva y genética de las poblaciones domésticas, el estudio de los sistemas tradicionales de explotación, la evaluación de los impactos ecológicos y sociales de estos recursos y sistemas, y todo ello orientado a su utilización en el desarrollo rural sostenible de Iberoamérica."
- Published
- 2005
105. [The stability of solid food labeled with different radiopharmaceuticals for studying gastric emptying]
- Author
-
T, Martínez, D, Benítez, J A, Nuño de la Rosa, and T, Fuente
- Subjects
Hot Temperature ,Eggs ,In Vitro Techniques ,Technetium Compounds ,Rhenium ,Drug Stability ,Gastric Emptying ,Solubility ,Isotope Labeling ,Technetium Tc 99m Sulfur Colloid ,Solvents ,Digestion ,Hydrochloric Acid ,Stress, Mechanical ,Particle Size ,Radiopharmaceuticals ,Technetium Tc 99m Aggregated Albumin - Abstract
Sulfur colloid 99mTc-SC, the radiopharmaceutical of choice for solid gastric emptying studies, is not available in our country. It has led us to assess the solid binding stability of seven alternative radiopharmaceuticals that could present adequate fixation to it a priori.The stability of labelled solid food with seven colloidal 99mTc-radiopharmaceuticals of different sizes and nature (MAA, tin colloid, rhenium sulphide macrocolloid, albumin microcolloid, sulfur nanocolloid, albumin nanocolloid and rhenium sulfur nanocolloid) has been studied by measuring their dissociated activity after two hours digestion in simulated gastric fluid (kept 120' in agitation, in HCl 0.1 M at 37). The survey also assesses radiopharmaceutical labelling stability after two hours digestion in identical conditions by measuring their radiochemical purity in ITLC.In these conditions, MAA, rhenium sulphide macrocolloid, albumin microcolloid and albumin microcolloid present the best behaviour, with an activity linked to food over 90 % of the previously fixed activity.According to the results, there is no relationship between the radiopharmaceutical size and nature and the stability of its binding to the solid food. Because rhenium sulphide macrocolloid is no longer manufactured and the other three radiopharmaceuticals which have a binding stability to the solid food over 90 % do not include digestive explorations amongst their indications, nowadays, there is a serious legal limitation to carry out this type of studies in our country.
- Published
- 2004
106. LA INFORMACIÓN GEOGRÁFICA COMO HERRAMIENTA PARA LA PLANIFICACIÓN Y GESTIÓN TURÍSTICA EN RTT
- Author
-
Enríquez, A. Fernández, primary, López, D. Benítez, additional, Benito, A. Soto, additional, and Azzariohi, A., additional
- Full Text
- View/download PDF
107. [Herpes simplex and varicella zoster in HIV seropositive and AIDS patients diagnosed at the 'Pedro Kouri' Institute of Tropical Medicine. Nurses' role]
- Author
-
A, Alfonso Rittoles, M E, Ricardo Fonseca, N, Feliú Lamarque, and D, Benítez Mazorra
- Subjects
Chickenpox ,AIDS-Related Opportunistic Infections ,Tropical Medicine ,HIV Seropositivity ,Academies and Institutes ,Cuba ,Humans ,Herpes Simplex ,Retrospective Studies - Abstract
A retrospective and descriptive study composed of HIV and AIDS seropositive patients was conducted, 90 patients with infections caused by herpes simplex and zoster varicella were taken as a sample. Percentage was applied to them. Within the opportunistic infections, those caused by microorganisms from the Herpes viridae family, such as herpes simplex virus type I and II, cytomegalovirus, hoster varicella, and Epstein Barr's virus are very frequent among these patients. The nursing role in the attention to HIV and AIDS seropositive patients with infections produced by herpes simplex and zoster varicella was analyzed during two years. Herpes simplex infection (88.8% of the cases) showed the highest incidence and its genital localization was the most frequent one. 100% of the lesions of the skin and of the mucous membranes were cured. The efficiency of nursing care in these infections was proved and emphasis was made on how important it is to fulfil the biosafety measures with these patients.
- Published
- 1997
108. [Dermatitis and neurological changes]
- Author
-
M D, Benítez León, J, Tercedor, A, Ibáñez Pérez de la Blanca, and J, Martí García
- Subjects
Adult ,Diagnosis, Differential ,Chronic Disease ,Humans ,Dermatitis ,Female ,Nervous System Diseases ,Pellagra - Published
- 1995
109. [Dietary habits of 2 populations of the province of Barcelona (I): design and validation of a semiquantitative questionnaire of frequency of food consumption]
- Author
-
J M, Ramón, T, Micaló, D, Benítez, L, Escolano, P, Pe, A, Recasens, and M, Romera
- Subjects
Adult ,Male ,Time Factors ,Adolescent ,Feeding Behavior ,Middle Aged ,Diet Records ,Diet ,Evaluation Studies as Topic ,Spain ,Surveys and Questionnaires ,Humans ,Female ,Aged - Abstract
The identification of associations between alimentary factors and specific chronic diseases has led to the development of valid diet measurement methods. In the present article the design and validation of a questionnaire on the frequency of food consumption is reported.From an initial sample of 1,034 inhabitants of two populations in the province of Barcelona, Spain, a sample stratified by age, sex and population of 64 individuals between 13-70 years of age was randomly selected. A semiquantitative questionnaire was initially given to 58 of the 64 subjects including 39 foods or groups of food and these were instructed as to how to follow a registry of food for 7 days in two different periods. The intakes of energy products, macronutrients, fiber, cholesterol and vitamins C, A and E were estimated by the two methods were compared.The means of nutrients estimated were lower in the questionnaire than those obtained by the reports of foods with the exception of the intake of carbohydrates. The range of the correlation coefficients for the values obtained by both methods was of 0.17 for vitamin E and 0.54 for the monounsaturated fatty acids which, after correction for the alternation factor, were found to be 0.20 and 0.67, respectively. Thirty-nine percent of the individuals were classified within the quintile of low consumption with 33% being within the quintile of greatest consumption.The use of a semiquantitative questionnaire may be useful to describe the dietary habits in a given population and fundamentally when the population studied is to be classified according to the normal consumption of energy and macronutrients.
- Published
- 1994
110. [Dietary habits of 2 populations of the province of Barcelona (II): comparative study of the frequency of consumption in both populations and its relationship to recommended diet in diabetes]
- Author
-
T, Micaló, D, Benítez, L, Escolano, P, Pe, J M, Ramón, A, Recasens, and M, Romera
- Subjects
Adult ,Aged, 80 and over ,Male ,Adolescent ,Feeding Behavior ,Middle Aged ,Age Distribution ,Cross-Sectional Studies ,Spain ,Diet, Diabetic ,Diabetes Mellitus ,Humans ,Female ,Sex Distribution ,Aged - Abstract
The aim of the present study was to compare the eating habits of two urban populations (Vilanova i la Geltrú and Gavá) of the province of Barcelona, Spain, and determine the relation with the diet recommended in diabetes since this diet does not differ from what is considered "equilibrated diet".One thousand thirty-four individuals randomly selected from Primary Health Care Centers (PHCC) by a systematic sampling of all the outpatient consultations over one year to whom a questionnaire on semiquantitative frequencies were studied with the aim of determining their everyday diet. All those between 13 and 80 years of age, residing in the two municipalities studied and who attended the PHCC over the period of the study were included in the study.On comparison of both populations a statistically higher consumption (p0.01) of milk products, fish, vegetables, fruits and oils was observed in Vilanova i la Geltrú than in Gavá. Both groups presented a lower intake than recommended of fish, vegetables, and fruits. In contrast a high intake of sugar, ice cream and sugared beverages and foods were observed in the two populations studied and in the younger are groups.The population of Vilanova i la Geltrú have dietary habits which are closer to those recommended in the diet of diabetics than the population of Gavá.
- Published
- 1994
111. Lipomatosis simétrica múltiple
- Author
-
D. Benítez Merelo and M.C. Gómez Molero
- Subjects
Community and Home Care ,business.industry ,Lipomatosis ,Gastroenterology ,medicine ,Anatomy ,medicine.disease ,business - Published
- 2001
- Full Text
- View/download PDF
112. Análisis tridimensional del proceso de granallado utilizando un modelo de múltiples impactos.
- Author
-
Gonzales, M. A. Calle, Barrios, D. Benítez, Ângelo, E., and Gonçalves, E.
- Subjects
- *
SHOT peening , *MATERIAL fatigue , *METAL fatigue , *CYCLIC loads , *RESIDUAL stresses - Abstract
The shot peening is one of the most used superficial treatments for, amongst other applications, providing a considerable increase of the fatigue life elements of machines and structures submitted to cyclic loads. The control of parameters, such as, the depth of the plastic zone, residual stresses level, among others, is of vital importance to guarantee the adequate application of the treatment. To simulate the shot peening process, using the Finite Elements Method, a three-dimensional representative cell model of the treated part surface is created and submitted to the multiple impact shots. The model evaluates the compression residual stresses field in different regions of the cell surface, due to the impact shots, in order to find the best representation through out the cell. The representative profile evaluation is important, since it is responsible for the improvement of the mechanical properties of the component. The results reveal additionally, in an implicit way, the effect of the shot peening process covering, in the behavior of the residual stress profile, which is also commented in the work. The results are compared with experimental results available in the specialized literature and presented in form of graphs and tables. [ABSTRACT FROM AUTHOR]
- Published
- 2006
113. A giant exoplanet orbiting a very-low-mass star challenges planet formation models
- Author
-
Jesus M. Carro, A. Guijarro, F. Hernández Otero, Javier López-Santiago, E. Mirabet, Eduardo L. Martín, Hugo M. Tabernero, H. Martínez-Rodríguez, Antonio Claret, Martin Kürster, Florian Rodler, Birgit Fuhrmeister, M. Llamas, Z. M. Berdiñas, Thomas Henning, A. Rosich, Otmar Stahl, Guillem Anglada-Escudé, Luigi Mancini, E. W. Guenther, P. Huke, L. González-Cuesta, Ralf Launhardt, F. F. Bauer, Ignasi Ribas, D. Baroch, E. N. Johnson, M. Lafarga, Grzegorz Nowak, Priyanka Chaturvedi, M. Ammler-von Eiff, M. R. Zapatero Osorio, V. Wolthoff, E. Rodriguez, L. F. Sarmiento, E. Sánchez-Blanco, Luisa Lara, C. del Burgo, M. López del Fresno, Artie P. Hatzes, S. Lalitha, M. Kehr, Simon Tulloch, F. J. Lázaro, D. Montes, J. Klüter, Melvyn B. Davies, F. J. Aceituno, S. Martin-Ruiz, R. González-Peinado, Juan Luis Cano, Francesc Vilardell, Aviv Ofir, F. J. Abellán, J. Colomé, C. Cardona Guillén, Mathias Zechmeister, Urs Mall, D. Hintz, Richard P. Nelson, I. M. Ferro, V. M. Passegger, M. Cortés-Contreras, P. Martín-Fernández, M. Brinkmöller, Evangelos Nagel, Michael Perryman, Ovidio Rabaza, Jose Antonio Pascual, A. Kaminski, M. Perger, Gilles Bergond, D. Pérez Medialdea, Remo Burn, J. I. González Hernández, B. Arroyo-Torres, Rafael Luque, Martin Schlecker, Armin Huber, A. Fernández-Martín, M. J. López-González, S. Sabotta, G. Veredas, A. Ramón Ballesta, E. González-Álvarez, Fei Yan, Holger Mandel, J. Kemmer, J. I. Vico-Linares, S. Becerril-Jarque, Jorge Sanz-Forcada, Paula Sarkis, R. P. Hedrosa, Rafael Rebolo, J. Stürmer, A. Sánchez-López, Trifon Trifonov, F. Labarga, Jürgen H. M. M. Schmitt, Núria Casasayas-Barris, Alexandre Emsenhuber, Sebastian Schafer, J. A. Marín Molina, Alexander J. Mustill, Anders Johansen, H. Magán Madinabeitia, Hubert Klahr, F. J. Alonso-Floriano, S. V. Jeffers, I. Gallardo Cava, E. de Juan, Andreas Schweitzer, Peter H. Hauschildt, Ricardo Dorda, P. Redondo, M. Azzaro, M. Salz, M. Abril, Juan Carlos Suárez, Hans-Walter Rix, Carlos Cifuentes, Walter Seifert, M. L. García Vargas, Pedro J. Amado, J. Winkler, R. Hernández Arabí, S. Sadegi, I. Hermelo, A. Rodríguez Trinidad, G. Holgado, Karl Wagner, Vianak Naranjo, S. Czesla, M. Kim, D. Benítez, Sabine Reffert, A. Pavlov, Lluis Gesa, Nicolas Lodieu, Lisa Nortmann, D. Galadí-Enríquez, A. Moya, Andreas Quirrenbach, Jose A. Caballero, J. Aceituno, Enrique Herrero, Juan Carlos Morales, E. Casal, Emilio Marfil, Enrique Solano, Diana Kossakowski, E. Díez-Alonso, J.-L. Lizon, J. F. López Salas, M. Lampón, M. C. Cárdenas, P. Schöfer, Ansgar Reiners, R. Calvo-Ortega, T. Stuber, R. Antona, A. Garcia-Piquer, Lev Tal-Or, N. Labiche, Alfredo Sota, Ana Pérez-Calpena, David Barrado, Enric Palle, Stefan Dreizler, Cristina Rodríguez-López, Víctor J. S. Béjar, S. Stock, M. Fernandez, Chris Mordasini, E. de Guindos, S. Pedraz, H.-J. Hagen, Jaime Guardia, A. Klutsch, M. A. Sánchez Carrasco, Christopher Marvin, V. Casanova, Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737, Centros de Excelencia Severo Ochoa, INSTITUTO DE ASTROFISICA DE ANDALUCIA (IAA), SEV-2017-0709, Morales, J. C. [0000-0003-0061-518X], Mustill, A. J. [0000-0002-2086-3642], Ribas, I. [0000-0002-6689-0312], Davies, M. B. [0000-0001-6080-1190], Bauer, F. F. [0000-0003-1212-5225], Herrrero, E. [0000-0001-8602-6639], Rodríguez, E. [0000-0001-6827-9077], López González, M. J. [0000-0001-8104-5128], Rodríguez López, C. [0000-0001-5559-7850], Guenther, E. W. [0000-0002-9130-6747], López Santiago, J. [0000-0003-2402-8166], Kaminski, A. [0000-0003-0203-8208], Montes, D. [0000-0002-7779-238X], Baroch, D. [0000-0001-7568-5161], Alonso Floriano, F. J. [0000-0003-1202-5734], Ammler-von Eiff, M. [0000-0001-9565-1698], Anglada Escudé, G. [0000-0002-3645-5977], Barrado, D. [0000-0002-5971-9242], Becerril Jarque, S. [0000-0001-9009-1150], Díez Alonso, E. [0000-0002-5826-9892], Passegger, V. M. [0000-0002-8569-7243], Bergond, G. [0000-0003-3132-9215], Burn, R. [0000-0002-9020-7309], García Vargas, M. L. [0000-0002-2058-3528], Amado, P. J. [0000-0002-8388-6040], Cano, J. [0000-0003-1984-5401], Cardona Guillén, C. [0000-0002-2198-4200], Carro, J. [0000-0002-0838-3603], Abellán, F. J. [0000-0002-5724-1636], Chaturvedi, P. [0000-0002-1887-1192], Sabotta, S. [0000-0001-9078-5574], Cifuentes, C. [0000-0003-1715-5087], Colomé, J. [0000-0002-1678-2241], Arroyo Torres, B. [0000-0002-3392-4694], Emsenhuber, A. [0000-0002-8811-1914], Fuhrmeister, B. [0000-0001-8321-5514], Berdiñas, Z. M. [0000-0002-6057-6461], González Álvarez, E. [0000-0002-4820-2053], González Hernández, J. I. [0000-0002-0264-7356], Calvo Ortega, R. [0000-0003-3693-6030], Guàrdia, J. [0000-0002-7191-9001], Guijarro, A. [0000-0001-5518-1759], Lara, L. M. [0000-0002-7184-920X], Casasayas Barris, N. [0000-0002-2891-8222], Hermelo, I. [0000-0001-9178-694X], Hintz, D. [0000-0002-5274-2589], López del Fresno, M. [0000-0002-9479-7780], Czesla, S. [0000-0002-4203-4773], Johnson, E. [0000-0003-2260-5134], De Juan Fernández, E. [0000-0002-9382-4505], Kehr, M. [0000-0002-7420-7368], Galadí Enríquez, D. [0000-0003-4946-5653], Klüter, J. [0000-0002-3469-5133], González Cuesta, L. [0000-0002-1241-5508], Klutsch, A. [0000-0001-7869-3888], Labarga, F. [0000-0002-7143-0206], González Peinado, R. [0000-0002-6658-8930], Launhardt, R. [0000-0002-8298-2663], Lizon, J. L. [0000-0001-8928-2566], De Guindos, E. [0000-0002-8124-9101], Magan Madinabeitia, H. [0000-0003-1243-4597], Manici, L. [0000-0002-9428-8732], Huke, P. [0000-0001-5913-2743], Marín Molina, J. A. [0000-0002-3525-0806], Martín, E. [0000-0002-1208-4833], Rabaza, O. [0000-0003-2766-2103], Kim, M. [0000-0001-6218-2004], Martínez Rodríguez, H. [0000-0002-1919-228X], Marvin, C. J. [0000-0002-2249-2611], Rodríguez Trinidad, A. [0000-0002-3356-8634], Lampón, M. [0000-0002-0183-7158], Naranjo, V. [0000-0003-0097-1061], Nelson, R. [0000-0002-9687-8779], Nortmann, L. [0000-0001-8419-8760], Lodieu, N. [0000-0002-3612-8968], Ofir, A. [0000-0002-9152-5042], Aceituno, F. J. [0000-0001-8074-4760], Pascual Granado, J. [0000-0003-0139-6951], Pedraz, S. [0000-0003-1346-208X], Marfil, E. [0000-0001-8907-4775], Ramón Ballesta, A. [0000-0002-4323-0610], Redondo, P. G. [0000-0001-5992-5778], Martín Ruiz, S. [0000-0002-9006-7182], Sadegi, S. [0000-0001-9897-6121], Sánchez Carrasco, M. A. [0000-0001-5533-3660], Moya, A. [0000-0003-1665-5389], Sanz Forcada, J. [0000-0002-1600-7835], Sarkis, P. [0000-0001-8128-3126], Vilardell, F. [0000-0003-0441-1504], Nowak, G. [0000-0002-7031-7754], Schäfer, S. [0000-0001-8597-8048], Schlecker, M. [0000-0001-8355-2107], Béjar, V. J. S. [0000-0002-5086-4232], Pérez Calpena, A. [0000-0001-7361-9240], Schöfer, P. [0000-0002-5969-3708], Solano, E. [0000-0003-1885-5130], Sota, A. [https://orcid.org/0000-0002-9404-6952], Rodler, F. [0000-0003-0650-5723], Stuber, T. [0000-0003-2185-0525], García Piquer, A. [0000-0002-6872-4262], Suárez, J. C. [0000-0003-3649-8384], Tabernero, H. [0000-0002-8087-4298], Sánchez López, A. [0000-0002-0516-7956], Winkler, J. [0000-0003-0568-8820], Yan, F. [0000-0001-9585-9034], Sarmiento, L. F. [0000-0002-8475-9705], Luque, R. [0000-0002-4671-2957], Perger, M. [0000-0001-7098-0372], Schmitt, J. H. M. M. [0000-0003-2554-9916], Klahr, H. [0000-0002-8227-5467], Mordasini, C. [0000-0002-1013-2811], Aceituno, J. [0000-0003-0487-1105], Stock, S. [0000-0002-1166-9338], Cortés Contreras, M. [0000-0003-3734-9866], Lafarga, M. [0000-0002-8815-9416], Nagel, E. [0000-0002-4019-3631], Tulloch, S. [0000-0003-0840-8521], Reffert, S. [0000-0002-0460-8289], Rosich, A. [0000-0002-9141-3067], Trifonov, T. [0000-0002-0236-775X], Zapatero Osorio, M. R. [0000-0001-5664-2852], Israel Science Foundation (ISF), Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT), Swiss National Science Foundation (SNSF), Deutsches Zentrum für Luft- und Raumfahrt (DLR), Ministero dell'Istruzione, dell'Università e della Ricerca (MIUR), European Research Council (ERC), Generalitat de Catalunya, Deutsche Forschungsgemeinschaft (DFG), Queen Mary University of London, Consejo Nacional de Ciencia y Tecnología (CONACYT), Ministerio de Ciencia, Innovación y Universidades (España), European Commission, Israel Science Foundation, Consejo Nacional de Ciencia y Tecnología (México), German Centre for Air and Space Travel, European Research Council, German Research Foundation, National Science Foundation (US), Swiss National Science Foundation, Science and Technology Facilities Council (UK), Knut and Alice Wallenberg Foundation, Spanish Ministry for Science, Ramón y Cajal programa, Israel Science Foundation grant, CONICYT-FONDECYT/Chile Postdoctorado, Deutsches Zentrum fur Luft-un Raumfahrt (DLR), Italian Minister of Instruction, Mexican national council for science and technology, Centro de Excelencia Científica Severo Ochoa Instituto de Astrofísica de Andalucía CSIC, German Science Foundation (DFG) Research Unit, Priority Programs SPP, Exploring the Diversity of Extrasolar Planets, Swiss National Science Foundation under grant, Queen Mary University of London Scholarship and STFC, Spanish MCIU FPI-SO predoctoral contract, and European Research Council under the European Union Horizon 2020 research and innovation program
- Subjects
010504 meteorology & atmospheric sciences ,Gas giant ,530 Physics ,FOS: Physical sciences ,Minimum mass ,Astrophysics::Cosmology and Extragalactic Astrophysics ,7. Clean energy ,01 natural sciences ,Settore FIS/05 - Astronomia e Astrofisica ,Planet ,0103 physical sciences ,Astrophysics::Solar and Stellar Astrophysics ,010303 astronomy & astrophysics ,Solar and Stellar Astrophysics (astro-ph.SR) ,Astrophysics::Galaxy Astrophysics ,0105 earth and related environmental sciences ,Earth and Planetary Astrophysics (astro-ph.EP) ,Physics ,Multidisciplinary ,520 Astronomy ,Giant planet ,Astronomy ,Planetary system ,620 Engineering ,Accretion (astrophysics) ,Exoplanet ,Orbit ,Astrophysics - Solar and Stellar Astrophysics ,13. Climate action ,Astrophysics::Earth and Planetary Astrophysics ,Astrophysics - Earth and Planetary Astrophysics - Abstract
Surveys have shown that super-Earth and Neptune-mass exoplanets are more frequent than gas giants around low-mass stars, as predicted by the core accretion theory of planet formation. We report the discovery of a giant planet around the very-low-mass star GJ 3512, as determined by optical and near-infrared radial-velocity observations. The planet has a minimum mass of 0.46 Jupiter masses, very high for such a small host star, and an eccentric 204-day orbit. Dynamical models show that the high eccentricity is most likely due to planet-planet interactions. We use simulations to demonstrate that the GJ 3512 planetary system challenges generally accepted formation theories, and that it puts constraints on the planet accretion and migration rates. Disk instabilities may be more efficient in forming planets than previously thought.Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science, This research was supported by the following programs, grants, and fellowships: Spanish Ministry for Science, Innovation and Universities (MCIU) ESP2014-54062-R, ESP2014-54362P, AYA2015-69350-C3-2-P, BES-2015-074542, AYA2016-79425-C3-1/2/3-P, ESP2016-76076-R, ESP2016-80435-C2-1-R, ESP2016-80435-C2-2-R, ESP2017-87143-R, ESP2017-87676-C05-02-R, ESP-2017-87676-2-2, RYC-2012-09913 (>Ramon y Cajal> program), and FPU15/01476; Israel Science Foundation grant 848/16, CONICYT-FONDECYT/Chile Postdoctorado 3180405; Deutsches Zentrum fur Luft-un Raumfahrt (DLR) 50OW0204 and 50OO1501; Italian Minister of Instruction, University and Research (MIUR), FFABR 2017; University of Rome Tor Vergata, >Mission: Sustainability 2016> fund; European Research Council under the European Union Horizon 2020 research and innovation program 694513; Mexican national council for science and technology CONACYT, CVU 448248; the >Center of Excellence Severo Ochoa> award for the Instituto de Astrofisica de Andalucia (SEV-2017-0709); Generalitat de Catalunya/CERCA program; Fondo Europeo de Desarollo Regional (FEDER); German Science Foundation (DFG) Research Unit FOR2544 >Blue Planets around Red Stars> and Priority Programs SPP 1833, >Building a Habitable Earth> and SPP 1992, >Exploring the Diversity of Extrasolar Planets> NSF grants PHY17-48958 and PHY-1607761; Swiss National Science Foundation under grant BSGIO_155816 >PlaneltsInTime' and within the framework of the NCCR PlanetS; Queen Mary University of London Scholarship and STFC Consolidated Grant ST/P000592/1; Spanish MCIU FPI-SO predoctoral contract BES-2017-082610 and the Knut and Alice Wallenberg Foundation.
- Full Text
- View/download PDF
114. [Neural and cochlear potentials registered through the Eustachian tube]
- Author
-
L D, Benítez, E, Dávalos, and I, Ortega
- Subjects
Tympanic Membrane ,Evaluation Studies as Topic ,Eustachian Tube ,Cats ,Action Potentials ,Animals ,Humans ,Wounds and Injuries ,Cochlear Nerve ,Electrodes - Published
- 1974
115. [Measurement of cardiac output by thermodilution with a diode as a temperature sensor]
- Author
-
A, Díaz Fernández, D, Benítez, G, Sánchez Tello, and L A, Márquez
- Subjects
Dogs ,Thermodilution ,Animals ,Cardiac Output ,Electrodes - Abstract
An area integrator for the thermodilution curve in cardiac output measurement is described. A new temperature sensor is used, a diode with some advantages over the thermistor normally used. The main advantages are: easy calibration and replacement, and broad range of linearity. The cardiac output values obtained in dog with the integrator follow a linear relationship with those of the flowmeter. In simultaneous measurements the correlation is R = 0.96. Using a diode as temperature sensor a modification of the Steward Hamilton equation (used for thermistor) is necessary. With this new equation a monogram is performed to calculate the cardiac output from the area given by the numerical integrator.
- Published
- 1979
116. [Temporal cochlear changes evoked by prolonged exposure to low intensity noise. Electrophysiological study in guinea pigs]
- Author
-
L D, Benítez
- Subjects
Time Factors ,Acoustic Stimulation ,Audiometry ,Hearing Loss, Noise-Induced ,Guinea Pigs ,Animals ,Noise ,Cochlear Nerve - Abstract
Behavioral temporal threshold shifts (TTS) have been shown in the chinchilla, to be correlated with cochlear microphonic (CM) and whole-nerve action potential (AP) losses in the sensitivity as well as in maximum voltage. The Guinea-pig's ear differs significantly both anatomically and physiologically from the chinchilla's; as a result, it does not seem to be as susceptible to TTS at non-injurious noise levels, except at those frequency bands were middle-ear impedance and other factors are more favorable. At times varying from 2 hrs to 48 hrs after termination of noise exposures of 48 hrs duration to an octave-band of noise (7-14 KHz) with a sound-pressure level of 95 dB, the CM from the first three cochlear turns as well as the whole-nerve AP were measured in Guinea pigs. Losses in sensitivity as well as in maximum voltage were found in the CM recorded from the first turn. CM recovered gradually with time, reaching normal levels at about 40 hrs after termination of noise exposures. The AP +showed similar losses. Microscopic examination of the organ of Corti showed no loss of hair cells.
- Published
- 1976
117. Correlative ultrastructural and electrophysiological study of the Purkinje system of the heart
- Author
-
A. Trillo, D. Benítez, J. Alanís, and S.A. Bencosme
- Subjects
Pathology ,medicine.medical_specialty ,Purkinje fibers ,Biology ,Tendons ,Purkinje Cells ,Dogs ,Myofibrils ,Heart Conduction System ,medicine ,Animals ,False tendon ,Papillary muscle ,Trabeculae carneae ,CATS ,Ventricular wall ,Anatomy ,Papillary Muscles ,Mitochondria ,Electrophysiology ,Microscopy, Electron ,medicine.anatomical_structure ,Ultrastructure ,Cats ,Rabbits ,Cardiology and Cardiovascular Medicine - Abstract
Summary To delineate major morphological differences between Purkinje and working myocardial fibers, a comparative electrophysiological and ultrastructural study of the Purkinje system and working myocardial cells was undertaken. To this effect, the false tendon, papillary muscle, trabeculae carneae and segments of the Purkinje extramural network from hearts of dogs, rabbits and cats were studied. The cell populations of the false tendon and of the extramural Purkinje network have similar characteristics and can be, therefore, easily differentiated from the papillary muscle, trabeculae carneae and working myocardial fibers of the ventricular wall. The main distinguishing features of Purkinje fibers are the absence of triads and the presence of peculiar small mitochondria. In addition, the intercalated discs are straighter and thus less prominent than in working myocardial fibers. Some of the current discrepancies on the ultrastructure of the Purkinje system and working myocardial fibers have been resolved by this correlated electrophysiological and morphological study.
- Published
- 1969
118. [Transitional potentials in heart cells and propagation of impulses through heterogeneous structures]
- Author
-
J, Alanís and D, Benítez
- Subjects
Electrocardiography ,Dogs ,Heart Conduction System ,Action Potentials ,Animals ,Rabbits ,Electric Stimulation - Published
- 1966
119. Sympathetic cardiac stimulating fibers in the vagi
- Author
-
S. Middleton, B. Holmgren, and D. Benítez
- Subjects
Cardiac function curve ,Isolated Heart Preparation ,CATS ,Cardiotonic Agents ,business.industry ,Stimulation ,Heart ,Vagus Nerve ,Vagus nerve ,Cardiovascular physiology ,Physiology (medical) ,Heart innervation ,Anesthesia ,Medicine ,Humans ,business ,Adrenergic Fibers - Abstract
The cardiac effects obtained by the stimulation of the vagus nerve were studied in the isolated heart preparation of cats, perfused with Tyrode's solution according to Langendorff's technique. High cervical stimulation of the vagus produced slight or no positive inotropic and chronotropic effects in the atropinized heart. Excitation of the thoracic portion produced intense cardiac stimulation. The cardiac stimulating effect is not influenced by supra- or infranodose vagotomy. Complete cervical and upper thoracic sympathectomy abolished vagal cardiac stimulation. It is concluded that sympathetic fibers that join the vagal trunk at the lower cervical and, perhaps, upper thoracic level, are responsible for the positive chrono and inotropic effects obtained when stimulating the intact or degenerated vagus nerve.
- Published
- 1959
120. The CARMENES search for exoplanets around M dwarfs. First visual-channel radial-velocity measurements and orbital parameter updates of seven M-dwarf planetary systems
- Author
-
E. de Juan, Ralf Launhardt, M. Zechmeister, P. Rhode, Birgit Fuhrmeister, E. Díez-Alonso, Rafael Luque, H. J. Hagen, David Barrado, H. W. Rix, Ignasi Ribas, J. F. López Salas, L. M. Lara, Enric Palle, Stefan Dreizler, Cristina Rodríguez-López, Víctor J. S. Béjar, F. F. Bauer, Paula Sarkis, J. Stürmer, C. J. Marvin, Ovidio Rabaza, J. I. González Hernández, V. Wolthoff, Grzegorz Nowak, Jose Antonio Pascual, P. Schöfer, D. Maroto Fernández, Richard J. Mathar, Juan Gutiérrez-Soto, M. Cortés-Contreras, A. Claret, A. Kaminski, S. Grohnert, M. Lafarga, Walter Seifert, A. Guijarro, Susana Martín-Ruiz, I. Hermelo, A. Rosich, S. Sadegi, W. Xu, Holger Mandel, C. del Burgo, S. V. Jeffers, H. Magán Madinabeitia, Jorge Sanz-Forcada, M. Pluto, R.-R. Rohloff, D. Benítez, J. Klüter, M. Tala, Eike W. Guenther, D. Galadí-Enríquez, D. Montes, Ana Pérez-Calpena, Josep Colomé, Peter H. Hauschildt, M. Brinkmöller, Werner Laun, C. Feiz, A. Pavlov, E. Solano, J. Winkler, Eduardo L. Martín, Hugo M. Tabernero, U. Lemke, Ulrich Mall, Andreas Schweitzer, Manuel Perger, R. Hernández Arabí, Miguel Abril, A. Ramón, E. de Guindos, L. F. Sarmiento, Simon Tulloch, Karl Wagner, S. Pedraz, Fei Yan, J. B. P. Strachan, R. P. Hedrosa, A. P. Hatzes, Jesús Aceituno, P. Redondo, Guillem Anglada-Escudé, Johana Panduro, Rafael Rebolo, R. Oreiro, Philipp Huke, A. Sánchez-López, E. Rodriguez, E. Herrero, Evangelos Nagel, V. Gómez Galera, V. M. Passegger, Ralf Klein, M. E. Moreno-Raya, Otmar Stahl, H. Anwand-Heerwart, M. Azzaro, E. Casal, Luigi Mancini, M. A. C. Perryman, M. A. Sánchez Carrasco, J. Schiller, J. H. M. M. Schmitt, S. Reinhardt, M. Lampón, Z. M. Berdiñas, B. Arroyo-Torres, A. Klutsch, Ulrich Grözinger, S. Czesla, J. I. Vico Linares, M. J. López-González, M. López del Fresno, Reinhard Mundt, Sebastian Schafer, L. Hernández Castaño, Juan Carlos Suárez, Florian Rodler, D. Baroch, Lluis Gesa, Jose A. Caballero, M. Kürster, M. Blümcke, Emilio Marfil, Gilles Bergond, G. Veredas, C. Cifuentes, J. A. Marín Molina, F. J. Alonso-Floriano, Ernesto Sánchez-Blanco, S. Becerril, I. M. Ferro, Vianak Naranjo, Javier López-Santiago, E. Mirabet, J. Helmling, E. N. Johnson, Ansgar Reiners, R. Antona, M. L. García Vargas, A. Garcia-Piquer, Pedro J. Amado, A. Rodríguez Trinidad, J. Cano, M. Kim, Juan Carlos Morales, Trifon Trifonov, Lisa Nortmann, Andreas Quirrenbach, A. Moya, Th. Henning, Lev Tal-Or, M. Fernandez, J. Guàrdia, F. Hernández Hernando, Manuel López-Puertas, M. Ammler-von Eiff, M. R. Zapatero Osorio, Francesc Vilardell, M. C. Cárdenas Vázquez, Aviv Ofir, Rainer Lenzen, R. González-Peinado, Sabine Reffert, D. Pérez Medialdea, Armin Huber, Max Planck Society, Consejo Superior de Investigaciones Científicas (España), European Commission, Ministerio de Economía y Competitividad (España), Ministry of Science, Research and Art Baden-Württemberg, German Research Foundation, Junta de Andalucía, Universidad Complutense de Madrid, Ministerio de Ciencia, Innovación y Universidades (España), Comisión Nacional de Investigación Científica y Tecnológica (Chile), and German Centre for Air and Space Travel
- Subjects
Astrofísica ,FOS: Physical sciences ,Context (language use) ,Stars: late-type ,Astrophysics ,7. Clean energy ,01 natural sciences ,Settore FIS/05 - Astronomia e Astrofisica ,low-mass [Stars] ,Planet ,0103 physical sciences ,Stars: low-mass ,010303 astronomy & astrophysics ,Earth and Planetary Astrophysics (astro-ph.EP) ,Orbital elements ,Physics ,Planets and satellites: dynamical evolution and stability ,010308 nuclear & particles physics ,Astronomy and Astrophysics ,Planetary system ,dynamical evolution and stability [Planets and satellites] ,Exoplanet ,Radial velocity ,Astronomía ,Planetary systems ,Stars ,13. Climate action ,Space and Planetary Science ,late-type [Stars] ,Terrestrial planet ,Astrophysics - Earth and Planetary Astrophysics - Abstract
The appendix tables are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/609/A117, Context. The main goal of the CARMENES survey is to find Earth-mass planets around nearby M-dwarf stars. Seven M dwarfs included in the CARMENES sample had been observed before with HIRES and HARPS and either were reported to have one short period planetary companion (GJ 15 A, GJ 176, GJ 436, GJ 536 and GJ 1148) or are multiple planetary systems (GJ 581 and GJ 876). Aims. We aim to report new precise optical radial velocity measurements for these planet hosts and test the overall capabilities of CARMENES. Methods. We combined our CARMENES precise Doppler measurements with those available from HIRES and HARPS and derived new orbital parameters for the systems. Bona-fide single planet systems were fitted with a Keplerian model. The multiple planet systems were analyzed using a self-consistent dynamical model and their best fit orbits were tested for long-term stability. Results. We confirm or provide supportive arguments for planets around all the investigated stars except for GJ 15 A, for which we find that the post-discovery HIRES data and our CARMENES data do not show a signal at 11.4 days. Although we cannot confirm the super-Earth planet GJ 15 Ab, we show evidence for a possible long-period (P = 7030 d) Saturn-mass (msini = 51.8M) planet around GJ 15 A. In addition, based on our CARMENES and HIRES data we discover a second planet around GJ 1148, for which we estimate a period P = 532.6 days, eccentricity e = 0.342 and minimum mass msini = 68.1M. Conclusions. The CARMENES optical radial velocities have similar precision and overall scatter when compared to the Doppler measurements conducted with HARPS and HIRES. We conclude that CARMENES is an instrument that is up to the challenge of discovering rocky planets around low-mass stars.© ESO, 2018., CARMENES is an instrument for the Centro Astronomico Hispano-Aleman de Calar Alto (CAHA, Almeria, Spain). CARMENES is funded by the German Max-Planck-Gesellschaft (MPG), the Spanish Consejo Superior de Investigaciones Cientificas (CSIC), the European Union through FEDER/ERF FICTS-2011-02 funds, and the members of the CARMENES Consortium (Max-Planck-Institut fur Astronomie, Instituto de Astrofisica de Andalucia, Landessternwarte Konigstuhl, Institut de Ciencies de l'Espai, Insitut fur Astrophysik Gottingen, Universidad Complutense de Madrid, Thuringer Landessternwarte Tautenburg, Instituto de Astrofisica de Canarias, Hamburger Sternwarte, Centro de Astrobiologia and Centro Astronomico Hispano-Aleman), with additional contributions by the Spanish Ministry of Economy, the German Science Foundation (DFG), the Klaus Tschira Stiftung, the states of Baden-Wurttemberg and Niedersachsen, the DFG Research Unit FOR2544 >Blue Planets around Red Stars>, and by the Junta de Andalucia. This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. This work used the Systemic Console package (Meschiari et al. 2009) for cross-checking our Keplerian and Dynamical fits and the python package astroML (VanderPlas et al. 2012) for the calculation of the GLS periodogram. The IEEC-CSIC team acknowledges support by the Spanish Ministry of Economy and Competitiveness (MINECO) and the Fondo Europeo de Desarrollo Regional (FEDER) through grant ESP2016-80435-C2-1-R, as well as the support of the Generalitat de Catalunya/CERCA programme. The IAA-CSIC team acknowledges support by the Spanish Ministry of Economy and Competitiveness (MINECO) through grants AYA2014-54348-C03-01 and AYA2016-79425-C3-3-P as well as FEDER funds. The UCM team acknowledges support by the Spanish Ministry of Economy and Competitiveness (MINECO) from projects AYA2015-68012-C2-2-P and AYA2016-79425- C3-1,2,3-P and the Spanish Ministerio de Educacion, Cultura y Deporte, programa de Formacion de Profesorado Universitario, under grant FPU15/01476. T. T. and M.K. thank to Jan Rybizki for the very helpful discussion in the early phases of this work. V.J.S.B. is supported by grant AYA2015-69350-C3-2-P from the Spanish Ministry of Economy and Competiveness (MINECO). J.C.S. acknowledges funding support from Spanish public funds for research under project ESP2015-65712-C5-5-R (MINECO/FEDER), and under Research Fellowship program >Ramon y Cajal> with reference RYC2012-09913 (MINECO/FEDER). The contributions of M.A. were supported by DLR (Deutsches Zentrum fur Luft- und Raumfahrt) through the grants 50OW0204 and 50OO1501. J.L.-S. acknowledges the Office of Naval Research Global (award No. N62909-15- 1-2011) for support. C.d.B. acknowledges that this work has been supported by Mexican CONACyT research grant CB-2012-183007 and the Spanish Ministry of Economy and Competitivity through projects AYA2014-54348-C3-2-R. J.I.G.H., and R.R. acknowledge financial support from the Spanish Ministry project MINECO AYA2014-56359-P. J.I.G.H. also acknowledges financial support from the Spanish MINECO under the 2013 Ramon y Cajal program MINECO RYC-2013-14875. V. Wolthoff acknowledges funding from the DFG Research Unit FOR2544 >Blue Planets around Red Stars>, project No. RE 2694/4-1.We thank the anonymous referee for the excellent comments that helped to improve the quality of this paper.
121. The CARMENES search for exoplanets around M dwarfs - HD 147379b: A nearby Neptune in the temperate zone of an early-M dwarf
- Author
-
Lluis Gesa, A. Lamert, Jose A. Caballero, Fei Yan, M. Blümcke, Karl Wagner, J. H. M. M. Schmitt, E. de Juan, E. Casal, V. Gómez Galera, Simon Tulloch, R. Oreiro, David Barrado, P. Schöfer, M. Lampón, Eike W. Guenther, A. P. Hatzes, Jesús Aceituno, A. Rosich, Rainer Lenzen, Enric Palle, Stefan Dreizler, Cristina Rodríguez-López, Víctor J. S. Béjar, B. Arroyo-Torres, H. Anwand-Heerwart, U. Lemke, J. B. P. Strachan, Miguel Abril, J. Schiller, J. Helmling, Evangelos Nagel, M. Lafarga, E. N. Johnson, Walter Seifert, R. P. Hedrosa, Rafael Rebolo, A. Guijarro, Sebastian Schafer, C. del Burgo, J. Klüter, M. Tala, S. Czesla, M. E. Moreno-Raya, A. Sánchez-López, Grzegorz Nowak, D. Montes, F. Labarga, L. Hernández Castaño, Juan Carlos Suárez, A. Claret, Ulrich Mall, J. F. López Salas, J. I. Vico Linares, E. Herrero, Florian Rodler, Manuel López-Puertas, M. Ammler-von Eiff, D. Baroch, Philipp Huke, R. González-Peinado, C. Feiz, M. J. López-González, S. V. Jeffers, S. Becerril, H. Magán Madinabeitia, I. M. Ferro, M. Brinkmöller, P. Rhode, M. R. Zapatero Osorio, I. Hermelo, Francesc Vilardell, C. J. Marvin, Ralf Launhardt, Gilles Bergond, M. López del Fresno, Reinhard Mundt, M. Zechmeister, Jorge Sanz-Forcada, M. C. Cárdenas Vázquez, G. Veredas, D. Pérez Medialdea, Aviv Ofir, Andreas Schweitzer, Armin Huber, Ansgar Reiners, R. Antona, A. Garcia-Piquer, Ana Pérez-Calpena, D. Maroto Fernández, D. Galadí-Enríquez, S. Reinhart, R. G. Ulbrich, H. W. Rix, Javier López-Santiago, E. Mirabet, C. Cifuentes, Johana Panduro, L. M. Lara, J. A. Marín Molina, A. Pavlov, M. Azzaro, M. A. Sánchez Carrasco, Susana Martín-Ruiz, Birgit Fuhrmeister, V. M. Passegger, A. Kaminski, M. Pluto, Richard J. Mathar, F. F. Bauer, Otmar Stahl, L. F. Sarmiento, Z. M. Berdiñas, Eduardo L. Martín, Hugo M. Tabernero, A. Rodríguez Trinidad, M. Kim, Peter H. Hauschildt, E. Solano, J. Winkler, Manuel Perger, R. Hernández Arabí, J. Cano, Lisa Nortmann, Andreas Quirrenbach, Trifon Trifonov, A. Klutsch, Ulrich Grözinger, S. Sadegi, Luigi Mancini, A. Moya, Holger Mandel, Ovidio Rabaza, Werner Laun, M. A. C. Perryman, J. I. González Hernández, W. Xu, F. J. Alonso-Floriano, A. Ramón, Ignasi Ribas, Ernesto Sánchez-Blanco, E. de Guindos, S. Pedraz, Vianak Naranjo, Sabine Reffert, M. Kürster, V. Wolthoff, H. J. Hagen, Emilio Marfil, Juan Gutiérrez-Soto, E. Díez-Alonso, M. Cortés-Contreras, Jose Antonio Pascual, Guillem Anglada-Escudé, Rafael Luque, Paula Sarkis, J. Stürmer, P. Redondo, S. Grohnert, E. Rodriguez, Ralf Klein, R.-R. Rohloff, D. Benítez, Josep Colomé, Th. Henning, Lev Tal-Or, M. Fernandez, J. Guàrdia, F. Hernández Hernando, M. L. García Vargas, Pedro J. Amado, Juan Carlos Morales, Max Planck Society, Consejo Superior de Investigaciones Científicas (España), European Commission, Ministerio de Economía y Competitividad (España), Ministry of Science, Research and Art Baden-Württemberg, Comisión Nacional de Investigación Científica y Tecnológica (Chile), German Centre for Air and Space Travel, European Research Council, and Ministerio de Ciencia, Innovación y Universidades (España)
- Subjects
Rotation period ,Stars: activity ,Astrofísica ,010504 meteorology & atmospheric sciences ,media_common.quotation_subject ,FOS: Physical sciences ,Astrophysics ,Stars: late-type ,01 natural sciences ,Planets and satellites: individual: HD 147379 b ,Settore FIS/05 - Astronomia e Astrofisica ,Neptune ,Planet ,low-mass [Stars] ,0103 physical sciences ,Stars: low-mass ,Eccentricity (behavior) ,individual: HD 147379 [Stars] ,010303 astronomy & astrophysics ,Solar and Stellar Astrophysics (astro-ph.SR) ,0105 earth and related environmental sciences ,media_common ,Physics ,Earth and Planetary Astrophysics (astro-ph.EP) ,Stars: rotation ,Stars: individual: HD 147379 ,Astronomy and Astrophysics ,Exoplanet ,individual: HD147379 [Stars] ,Radial velocity ,Astronomía ,rotation [Stars] ,Astrophysics - Solar and Stellar Astrophysics ,Space and Planetary Science ,late-type [Stars] ,individual: HD147379 b [Planets and satellites] ,individual: HD 147379 b [Planets and satellites] ,activity [Stars] ,Astrophysics - Earth and Planetary Astrophysics - Abstract
We report on the first star discovered to host a planet detected by radial velocity (RV) observations obtained within the CARMENES survey for exoplanets around M dwarfs. HD 147379 (V = 8.9 mag, M = 0.58 ± 0.08 M⊙), a bright M0.0 V star at a distance of 10.7 pc, is found to undergo periodic RV variations with a semi-amplitude of K = 5.1 ± 0.4 m s−1 and a period of P = 86.54 ± 0.06 d. The RV signal is found in our CARMENES data, which were taken between 2016 and 2017, and is supported by HIRES/Keck observations that were obtained since 2000. The RV variations are interpreted as resulting from a planet of minimum mass mP sin i = 25 ± 2 M⊕, 1.5 times the mass of Neptune, with an orbital semi-major axis a = 0.32 au and low eccentricity (e < 0.13). HD 147379 b is orbiting inside the temperate zone around the star, where water could exist in liquid form. The RV time-series and various spectroscopic indicators show additional hints of variations at an approximate period of 21.1 d (and its first harmonic), which we attribute to the rotation period of the star., FEDER/ERF FICTS-2011-02 funds, Major Research Instrumentation Programme and DFG Research Unit FOR2544 “Blue Planets around Red Stars, European Research Council (ERC-279347), Deutsche Forschungsgemeinschaft (RE 1664/12-1, RE 2694/4-1), Bundesministerium für Bildung und Forschung (BMBF-05A14MG3, BMBF-05A17MG3), Spanish Ministry of Economy and Competitiveness (MINECO, grants AYA2015-68012-C2-2-P, AYA2016-79425-C3-1,2,3-P, AYA2015-69350-C3-2-P, AYA2014-54348-C03- 01, AYA2014-56359-P, AYA2014-54348-C3-2-R, AYA2016-79425-C3-3-P and 2013 Ramòn y Cajal program RYC-2013-14875), Fondo Europeo de Desarrollo Regional (FEDER, grant ESP2016-80435-C2-1-R, ESP2015-65712-C5- 5-R), Generalitat de Catalunya/CERCA programme, Spanish Ministerio de Educación, Cultura y Deporte, programa de Formación de Profesorado Universitario (grant FPU15/01476), Deutsches Zentrum für Luft- und Raumfahrt (grants 50OW0204 and 50OO1501), Office of Naval Research Global (award no. N62909-15-1-2011), Mexican CONACyT grant CB-2012-183007.
122. Responsabilidad social de la universidad en la salud de la población rural
- Author
-
M. R. Olmos, D. M. Schettino, C. A. Castro, J. Bolpe, T. Cesio, and D. Benitez
- Subjects
salud ,responsabilidad social ,universidad ,educación ,equinococosis ,Medicine (General) ,R5-920 ,Public aspects of medicine ,RA1-1270 - Abstract
“Promoción y Educación para la Salud Social en Poblaciones Rurales” tiene como objetivos desarrollar acciones de salud comprendidas y compartidas por los diversos actores de la comunidad contribuyendo con la incorporación de hábitos saludables, identificación y diagnóstico de problemas sanitarios y colaborar en la provisión de medicamentos para el control de la equinococosis en las comunidades rurales del partido de Tandil. Posee financiamiento del Ministerio de Educación de la Nación y la participación de las Facultades de Ciencias Veterinarias y de Arte de la Universidad Nacional del Centro; dependencias gubernamentales de las áreas Salud y Educación de la Provincia de Buenos Aires y del Municipio de Tandil; el Rotary Club Tandil Norte y alumnos voluntarios de la universidad. La vinculación de la Universidad con su comunidad permite desarrollar prácticas en el área de Salud Pública. La transmisión de valores y actitudes en la educación superior fortalece la formación de profesionales socialmente responsables.
- Published
- 2014
- Full Text
- View/download PDF
123. High prevalence of Neospora caninum antibodies in water buffaloes (Bubalus bubalis) in ranches of Corrientes, Chaco and Formosa provinces, Argentina
- Author
-
M. Arzeno, A. Odeón, M.R. Leunda, D. Cano, J. Konrad, D. Polich, G. Draghi, D. Benitez, D.P. Moore, C.M. Campero, and G. Crudeli
- Subjects
Neospora caninum, Bubalus bubalis, Serology, Argentina ,Animal culture ,SF1-1100 - Abstract
Water buffaloes (Bubalus bubalis) are important to the economy of several countries including Argentina. N. caninum exposure and isolation have been reported in water buffaloes. The goal of this paper is to describe the prevalence of antibodies against N. caninum in water buffaloes from eight ranches located in the provinces of Corrientes, Chaco and Formosa. Anti-Neospora caninum antibodies were determined by using an indirect fluorescent antibody test (IFAT) in sera of 1,024 water buffaloes at a 1:100 dilution. Reproductive parameters were normal having >80% of pregnancy, >75% of calving and >70% of weaning in all farms. Antibody titers were found in 665 (64.9%) buffaloes. All farms presented positive animals. Results indicate a high exposure of water buffaloes to N. caninum in these provinces of the northeastern Argentina. Although more studies should be performed in order to assess the consequences of Neospora-infections in the water buffalo industry, the high prevalence of infected animals should be considered as a risky epidemiological variable.
- Published
- 2010
- Full Text
- View/download PDF
124. Médicos de familia y continuidad de cuidados
- Author
-
D. Benítez Merelo
- Subjects
Medicine(all) ,History ,Médico familia ,MEDLINE ,Cuidados ,General Medicine ,Family Practice ,Humanities ,Continuidad - Full Text
- View/download PDF
125. Inulin Supplementation Reduces Systolic Blood Pressure in Women with Breast Cancer Undergoing Neoadjuvant Chemotherapy
- Author
-
Becerril-Alarcón, Yizel, Campos-Gómez, Saúl, J. Valdez-Andrade, Juan, A. Campos-Gómez, Karen, Y. Reyes-Barretero, Diana, D. Benítez-Arciniega, Alejandra, Valdés-Ramos, Roxana, and E. Soto-Piña, Alexandra
- Abstract
Introduction. Breast cancer is the most frequently diagnosed malignancy in women, and comorbidities like hypertension and obesity diminish their quality of life and negatively affect their response to chemotherapy. Furthermore, inulin supplementation is associated with the reduction of cardiovascular diseases (CVD) risk. Objective. To determine whether inulin supplementation prevents the elevation of blood pressure in women with breast cancer undergoing neoadjuvant therapy with cyclophosphamide and doxorubicin. Methods. This was a randomized, double-blind placebo controlled trial which included women with early-stage breast cancer undergoing neoadjuvant therapy (n=38). Patients were randomly assigned to participate in two different groups to receive either 15 g of inulin or 15 g of placebo (maltodextrin) for 21 days. Body composition and blood pressure were evaluated before and after the supplementation period. Results. Women in the inulin group showed a lower systolic blood pressure (SBP) after the supplementation (-4.21 mmHg, p<0.001). However, SBP increased in the placebo supplemented group. Diastolic blood pressure (DBP) nonsignificantly decreased in the inulin group. Inulin supplementation also increased BMI (p<0.001) but reduced BFP (p=0.288). Furthermore, confounding variables, such as BMI, baseline fasting glucose, age, menopause status, vomiting, constipation, and chronic medication did not have a statistical influence over the inulin effect on SBP. Conclusion. Inulin supplementation reduces SBP and prevents increases in DBP in women with breast cancer. This could be an innovative nutraceutical approach to prevent hypertension present in women with this type of cancer at an early stage and may improve the quality of life of the patients and their prognostic development through chemotherapy. Trial Registration Number. This trial is registered with ACTRN12616001532493.
- Published
- 2019
- Full Text
- View/download PDF
126. MicroRNA-centered theranostics for pulmoprotection in critical COVID-19
- Author
-
Manel Perez-Pons, Marta Molinero, Iván D. Benítez, María C. García-Hidalgo, Shambhabi Chatterjee, Christian Bär, Jessica González, Antoni Torres, Ferran Barbé, and David de Gonzalo-Calvo
- Subjects
MT: Novel therapeutic targets and biomarker development Special Issue ,post-COVID syndrome ,long COVID ,microRNA ,pulmoprotection ,theranostics ,Therapeutics. Pharmacology ,RM1-950 - Abstract
Elucidating the pathobiological mechanisms underlying post-acute pulmonary sequelae following SARS-CoV-2 infection is essential for early interventions and patient stratification. Here, we investigated the potential of microRNAs (miRNAs) as theranostic agents for pulmoprotection in critical illness survivors. Multicenter study including 172 ICU survivors. Diffusion impairment was defined as a lung-diffusing capacity for carbon monoxide (DLCO)
- Published
- 2024
- Full Text
- View/download PDF
127. Cerebrospinal fluid lipidomic fingerprint of obstructive sleep apnoea in Alzheimer’s disease
- Author
-
Farida Dakterzada, Iván D. Benítez, Adriano Targa, Anna Carnes, Montse Pujol, Mariona Jové, Olga Mínguez, Rafi Vaca, Manuel Sánchez-de-la-Torre, Ferran Barbé, Reinald Pamplona, and Gerard Piñol-Ripoll
- Subjects
Alzheimer’s disease ,Biomarker ,Cerebrospinal fluid ,Diagnosis ,Lipidomics ,Obstructive sleep apnoea ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Abstract Background Obstructive sleep apnoea (OSA) has a high prevalence in patients with Alzheimer’s disease (AD). Both conditions have been shown to be associated with lipid dysregulation. However, the relationship between OSA severity and alterations in lipid metabolism in the brains of patients with AD has yet to be fully elucidated. In this context, we examined the cerebrospinal fluid (CSF) lipidome of patients with suspected OSA to identify potential diagnostic biomarkers and to provide insights into the pathophysiological mechanisms underlying the effect of OSA on AD. Methods The study included 91 consecutive AD patients who underwent overnight polysomnography (PSG) to diagnose severe OSA (apnoea-hypopnea index ≥ 30/h). The next morning, CSF samples were collected and analysed by liquid chromatography coupled to mass spectrometry in an LC-ESI-QTOF-MS/MS platform. Results The CSF levels of 11 lipid species were significantly different between AD patients with (N = 38) and without (N = 58) severe OSA. Five lipids (including oxidized triglyceride OxTG(57:2) and four unknown lipids) were significantly correlated with specific PSG measures of OSA severity related to sleep fragmentation and hypoxemia. Our analyses revealed a 4-lipid signature (including oxidized ceramide OxCer(40:6) and three unknown lipids) that provided an accuracy of 0.80 (95% CI: 0.71–0.89) in the detection of severe OSA. These lipids increased the discriminative power of the STOP-Bang questionnaire in terms of the area under the curve (AUC) from 0.61 (0.50–0.74) to 0.85 (0.71–0.93). Conclusions Our results reveal a CSF lipidomic fingerprint that allows the identification of AD patients with severe OSA. Our findings suggest that an increase in central nervous system lipoxidation may be the principal mechanism underlying the association between OSA and AD.
- Published
- 2023
- Full Text
- View/download PDF
128. Breathing cessation events that compose the apnea–hypopnea index are distinctively associated with the adverse outcomes in Alzheimer’s disease
- Author
-
Adriano D. S. Targa, Iván D. Benítez, Anna Moncusí-Moix, Farida Dakterzada, Olga Minguez, Rafaela Vaca, Mireia Dalmases, Manuel Sanchez-de-la-Torre, Ferran Barbé, and Gerard Piñol-Ripoll
- Subjects
Alzheimer’s disease ,Obstructive sleep apnea ,Apnea–hypopnea index ,Hypopneas ,Cognitive decline ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Abstract Background Previous studies challenge the impact of obstructive sleep apnea (OSA) once patients are diagnosed with Alzheimer’s disease (AD). Nevertheless, OSA recognizably disrupts sleep, and relevant associations between sleep, AD pathological markers, and cognition have been demonstrated. We aimed to further explore this, evaluating the associations between each breathing cessation event that compose the apnea–hypopnea index (AHI) and the sleep structure to finally investigate whether this was related to increased levels of AD markers and higher cognitive decline. Methods Observational, prospective study, including consecutive patients diagnosed with mild-moderate AD. The participants were submitted to overnight polysomnography followed by a cerebrospinal fluid collection for AD pathological markers levels determination. Neuropsychological assessment was performed at baseline and after 12 months of follow-up. Results The cohort was composed of 116 patients (55.2% females) with a median [p25;p75] age of 76.0 [72.0;80.0] years and an AHI of 25.9 [15.1;48.5], which was mainly defined by the presence of hypopneas and obstructive apneas. These were distinctively associated with the sleep structure, with obstructive apneas being related to arousals and sleep lightening and hypopneas being related to an increased number of arousals only. Despite having a lower frequency, mixed and central apneas also presented associations with the sleep structure, particularly increasing the time spent in the lighter sleep stages. In relation to AD pathological markers, obstructive and mixed apneas were related to an augment in neurofilament light levels while hypopneas were associated with a higher phosphorylated-tau/amyloid-beta protein ratio. Hypopneas were the most important event for an increased cognitive decline at the 12-month follow-up. Conclusions Our findings highlight the importance of a patient-centered approach, with a comprehensive and detailed analysis of the AHI to effectively predict the different outcomes and tailor the appropriate therapeutic strategies.
- Published
- 2023
- Full Text
- View/download PDF
129. A blood microRNA classifier for the prediction of ICU mortality in COVID-19 patients: a multicenter validation study
- Author
-
David de Gonzalo-Calvo, Marta Molinero, Iván D. Benítez, Manel Perez-Pons, Nadia García-Mateo, Alicia Ortega, Tamara Postigo, María C. García-Hidalgo, Thalia Belmonte, Carlos Rodríguez-Muñoz, Jessica González, Gerard Torres, Clara Gort-Paniello, Anna Moncusí-Moix, Ángel Estella, Luis Tamayo Lomas, Amalia Martínez de la Gándara, Lorenzo Socias, Yhivian Peñasco, Maria Del Carmen de la Torre, Elena Bustamante-Munguira, Elena Gallego Curto, Ignacio Martínez Varela, María Cruz Martin Delgado, Pablo Vidal-Cortés, Juan López Messa, Felipe Pérez-García, Jesús Caballero, José M. Añón, Ana Loza-Vázquez, Nieves Carbonell, Judith Marin-Corral, Ruth Noemí Jorge García, Carmen Barberà, Adrián Ceccato, Laia Fernández-Barat, Ricard Ferrer, Dario Garcia-Gasulla, Jose Ángel Lorente-Balanza, Rosario Menéndez, Ana Motos, Oscar Peñuelas, Jordi Riera, Jesús F. Bermejo-Martin, Antoni Torres, and Ferran Barbé
- Subjects
Biomarker ,COVID-19 ,ICU ,microRNA ,Prognosis ,SARS-CoV-2 ,Diseases of the respiratory system ,RC705-779 - Abstract
Abstract Background The identification of critically ill COVID-19 patients at risk of fatal outcomes remains a challenge. Here, we first validated candidate microRNAs (miRNAs) as biomarkers for clinical decision-making in critically ill patients. Second, we constructed a blood miRNA classifier for the early prediction of adverse outcomes in the ICU. Methods This was a multicenter, observational and retrospective/prospective study including 503 critically ill patients admitted to the ICU from 19 hospitals. qPCR assays were performed in plasma samples collected within the first 48 h upon admission. A 16-miRNA panel was designed based on recently published data from our group. Results Nine miRNAs were validated as biomarkers of all-cause in-ICU mortality in the independent cohort of critically ill patients (FDR
- Published
- 2023
- Full Text
- View/download PDF
130. Identification of circulating microRNA profiles associated with pulmonary function and radiologic features in survivors of SARS-CoV-2-induced ARDS
- Author
-
María C. García-Hidalgo, Jessica González, Iván D. Benítez, Paola Carmona, Sally Santisteve, Manel Pérez-Pons, Anna Moncusí-Moix, Clara Gort-Paniello, Fátima Rodríguez-Jara, Marta Molinero, Thalia Belmonte, Gerard Torres, Gonzalo Labarca, Estefania Nova-Lamperti, Jesús Caballero, Jesús F. Bermejo-Martin, Adrián Ceccato, Laia Fernández-Barat, Ricard Ferrer, Dario Garcia-Gasulla, Rosario Menéndez, Ana Motos, Oscar Peñuelas, Jordi Riera, Antoni Torres, Ferran Barbé, and David de Gonzalo-Calvo
- Subjects
Acute respiratory distress syndrome ,COVID-19 ,lung function ,microRNA ,sequelae ,total severity score ,Infectious and parasitic diseases ,RC109-216 ,Microbiology ,QR1-502 - Abstract
There is a limited understanding of the pathophysiology of postacute pulmonary sequelae in severe COVID-19. The aim of current study was to define the circulating microRNA (miRNA) profiles associated with pulmonary function and radiologic features in survivors of SARS-CoV-2-induced ARDS. The study included patients who developed ARDS secondary to SARS-CoV-2 infection (n = 167) and a group of infected patients who did not develop ARDS (n = 33). Patients were evaluated 3 months after hospital discharge. The follow-up included a complete pulmonary evaluation and chest computed tomography. Plasma miRNA profiling was performed using RT-qPCR. Random forest was used to construct miRNA signatures associated with lung diffusing capacity for carbon monoxide (DLCO) and total severity score (TSS). Kyoto Encyclopedia of Genes and Genomes (KEGG) and Gene Ontology (GO) enrichment analyses were conducted. DLCO
- Published
- 2022
- Full Text
- View/download PDF
131. GATEKEEPER’s Strategy for the Multinational Large-Scale Piloting of an eHealth Platform: Tutorial on How to Identify Relevant Settings and Use Cases
- Author
-
Jordi de Batlle, Ivan D Benítez, Anna Moncusí-Moix, Odysseas Androutsos, Rosana Angles Barbastro, Alessio Antonini, Eunate Arana, Maria Fernanda Cabrera-Umpierrez, Gloria Cea, George Ε Dafoulas, Frans Folkvord, Ane Fullaondo, Francesco Giuliani, Hsiao-Ling Huang, Pasquale F Innominato, Przemyslaw Kardas, Vivian W Q Lou, Yannis Manios, Maria Matsangidou, Franco Mercalli, Mounir Mokhtari, Silvio Pagliara, Julia Schellong, Lisa Stieler, Konstantinos Votis, Paula Currás, Maria Teresa Arredondo, Jorge Posada, Sergio Guillén, Leandro Pecchia, Ferran Barbé, Gerard Torres, and Giuseppe Fico
- Subjects
Computer applications to medicine. Medical informatics ,R858-859.7 ,Public aspects of medicine ,RA1-1270 - Abstract
BackgroundThe World Health Organization’s strategy toward healthy aging fosters person-centered integrated care sustained by eHealth systems. However, there is a need for standardized frameworks or platforms accommodating and interconnecting multiple of these systems while ensuring secure, relevant, fair, trust-based data sharing and use. The H2020 project GATEKEEPER aims to implement and test an open-source, European, standard-based, interoperable, and secure framework serving broad populations of aging citizens with heterogeneous health needs. ObjectiveWe aim to describe the rationale for the selection of an optimal group of settings for the multinational large-scale piloting of the GATEKEEPER platform. MethodsThe selection of implementation sites and reference use cases (RUCs) was based on the adoption of a double stratification pyramid reflecting the overall health of target populations and the intensity of proposed interventions; the identification of a principles guiding implementation site selection; and the elaboration of guidelines for RUC selection, ensuring clinical relevance and scientific excellence while covering the whole spectrum of citizen complexities and intervention intensities. ResultsSeven European countries were selected, covering Europe’s geographical and socioeconomic heterogeneity: Cyprus, Germany, Greece, Italy, Poland, Spain, and the United Kingdom. These were complemented by the following 3 Asian pilots: Hong Kong, Singapore, and Taiwan. Implementation sites consisted of local ecosystems, including health care organizations and partners from industry, civil society, academia, and government, prioritizing the highly rated European Innovation Partnership on Active and Healthy Aging reference sites. RUCs covered the whole spectrum of chronic diseases, citizen complexities, and intervention intensities while privileging clinical relevance and scientific rigor. These included lifestyle-related early detection and interventions, using artificial intelligence–based digital coaches to promote healthy lifestyle and delay the onset or worsening of chronic diseases in healthy citizens; chronic obstructive pulmonary disease and heart failure decompensations management, proposing integrated care management based on advanced wearable monitoring and machine learning (ML) to predict decompensations; management of glycemic status in diabetes mellitus, based on beat to beat monitoring and short-term ML-based prediction of glycemic dynamics; treatment decision support systems for Parkinson disease, continuously monitoring motor and nonmotor complications to trigger enhanced treatment strategies; primary and secondary stroke prevention, using a coaching app and educational simulations with virtual and augmented reality; management of multimorbid older patients or patients with cancer, exploring novel chronic care models based on digital coaching, and advanced monitoring and ML; high blood pressure management, with ML-based predictions based on different intensities of monitoring through self-managed apps; and COVID-19 management, with integrated management tools limiting physical contact among actors. ConclusionsThis paper provides a methodology for selecting adequate settings for the large-scale piloting of eHealth frameworks and exemplifies with the decisions taken in GATEKEEPER the current views of the WHO and European Commission while moving forward toward a European Data Space.
- Published
- 2023
- Full Text
- View/download PDF
132. Metabolipidomic Analysis in Patients with Obstructive Sleep Apnea Discloses a Circulating Metabotype of Non-Dipping Blood Pressure
- Author
-
Lucía Pinilla, Iván D. Benítez, Esther Gracia-Lavedan, Gerard Torres, Olga Mínguez, Rafaela Vaca, Mariona Jové, Joaquim Sol, Reinald Pamplona, Ferran Barbé, and Manuel Sánchez-de-la-Torre
- Subjects
obstructive sleep apnea ,blood pressure ,non-dipping ,metabolomic ,lipidomic ,metabolic pathways ,Therapeutics. Pharmacology ,RM1-950 - Abstract
A non-dipping blood pressure (BP) pattern, which is frequently present in patients with obstructive sleep apnea (OSA), confers high cardiovascular risk. The mechanisms connecting these two conditions remain unclear. In the present study we performed a comprehensive analysis of the blood metabolipidome that aims to provide new insights into the molecular link between OSA and the dysregulation of circadian BP rhythmicity. This was an observational prospective longitudinal study involving adults with suspected OSA who were subjected to full polysomnography (PSG). Patients with an apnea–hypopnea index ≥ 5 events/h were included. Fasting plasma samples were obtained the morning after PSG. Based on the dipping ratio (DR; ratio of night/day BP values) measured via 24 h ambulatory BP monitoring, two groups were established: dippers (DR ≤ 0.9) and non-dippers (DR > 0.9). Treatment recommendations for OSA followed the clinical guidelines. Untargeted metabolomic and lipidomic analyses were performed in plasma samples via liquid chromatography–tandem mass spectrometry. Non-dipper patients represented 53.7% of the cohort (88/164 patients). A set of 31 metabolic species and 13 lipidic species were differentially detected between OSA patients who present a physiologic nocturnal BP decrease and those with abnormal BP dipping. Among the 44 differentially abundant plasma compounds, 25 were putatively identified, notably glycerophospholipids, glycolipids, sterols, and fatty acid derivates. Multivariate analysis defined a specific metabotype of non-dipping BP, which showed a significant dose-response relationship with PSG parameters of OSA severity, and with BP dipping changes after 6 months of OSA treatment with continuous positive airway pressure (CPAP). Bioinformatic analyses revealed that the identified metabolipidomic profile was found to be implicated in multiple systemic biological pathways, with potential physiopathologic implications for the circadian control of BP among individuals with OSA.
- Published
- 2023
- Full Text
- View/download PDF
133. Upgrading the Fusion of Imprecise Classifiers
- Author
-
Serafín Moral-García, María D. Benítez, and Joaquín Abellán
- Subjects
imprecise classification ,Credal Decision Trees ,ensembles ,bagging ,combination technique ,Science ,Astrophysics ,QB460-466 ,Physics ,QC1-999 - Abstract
Imprecise classification is a relatively new task within Machine Learning. The difference with standard classification is that not only is one state of the variable under study determined, a set of states that do not have enough information against them and cannot be ruled out is determined as well. For imprecise classification, a mode called an Imprecise Credal Decision Tree (ICDT) that uses imprecise probabilities and maximum of entropy as the information measure has been presented. A difficult and interesting task is to show how to combine this type of imprecise classifiers. A procedure based on the minimum level of dominance has been presented; though it represents a very strong method of combining, it has the drawback of an important risk of possible erroneous prediction. In this research, we use the second-best theory to argue that the aforementioned type of combination can be improved through a new procedure built by relaxing the constraints. The new procedure is compared with the original one in an experimental study on a large set of datasets, and shows improvement.
- Published
- 2023
- Full Text
- View/download PDF
134. Prognostic implications of comorbidity patterns in critically ill COVID-19 patients: A multicenter, observational study
- Author
-
Iván D. Benítez, Jordi de Batlle, Gerard Torres, Jessica González, David de Gonzalo-Calvo, Adriano D.S. Targa, Clara Gort-Paniello, Anna Moncusí-Moix, Adrián Ceccato, Laia Fernández-Barat, Ricard Ferrer, Dario Garcia-Gasulla, Rosario Menéndez, Anna Motos, Oscar Peñuelas, Jordi Riera, Jesús F. Bermejo-Martin, Yhivian Peñasco, Pilar Ricart, María Cruz Martin Delgado, Luciano Aguilera, Alejandro Rodríguez, Maria Victoria Boado Varela, Fernando Suarez-Sipmann, Juan Carlos Pozo-Laderas, Jordi Solé-Violan, Maite Nieto, Mariana Andrea Novo, José Barberán, Rosario Amaya Villar, José Garnacho-Montero, Jose Luis García-Garmendia, José M. Gómez, José Ángel Lorente, Aaron Blandino Ortiz, Luis Tamayo Lomas, Esther López-Ramos, Alejandro Úbeda, Mercedes Catalán-González, Angel Sánchez-Miralles, Ignacio Martínez Varela, Ruth Noemí Jorge García, Nieves Franco, Víctor D. Gumucio-Sanguino, Arturo Huerta Garcia, Elena Bustamante-Munguira, Luis Jorge Valdivia, Jesús Caballero, Elena Gallego, Amalia Martínez de la Gándara, Álvaro Castellanos-Ortega, Josep Trenado, Judith Marin-Corral, Guillermo M Albaiceta, Maria del Carmen de la Torre, Ana Loza-Vázquez, Pablo Vidal, Juan Lopez Messa, Jose M. Añón, Cristina Carbajales Pérez, Victor Sagredo, Neus Bofill, Nieves Carbonell, Lorenzo Socias, Carme Barberà, Angel Estella, Manuel Valledor Mendez, Emili Diaz, Ana López Lago, Antoni Torres, and Ferran Barbé
- Subjects
COVID-19 ,Critical Care ,Prognosis ,Public aspects of medicine ,RA1-1270 - Abstract
Summary: Background: The clinical heterogeneity of COVID-19 suggests the existence of different phenotypes with prognostic implications. We aimed to analyze comorbidity patterns in critically ill COVID-19 patients and assess their impact on in-hospital outcomes, response to treatment and sequelae. Methods: Multicenter prospective/retrospective observational study in intensive care units of 55 Spanish hospitals. 5866 PCR-confirmed COVID-19 patients had comorbidities recorded at hospital admission; clinical and biological parameters, in-hospital procedures and complications throughout the stay; and, clinical complications, persistent symptoms and sequelae at 3 and 6 months. Findings: Latent class analysis identified 3 phenotypes using training and test subcohorts: low-morbidity (n=3385; 58%), younger and with few comorbidities; high-morbidity (n=2074; 35%), with high comorbid burden; and renal-morbidity (n=407; 7%), with chronic kidney disease (CKD), high comorbidity burden and the worst oxygenation profile. Renal-morbidity and high-morbidity had more in-hospital complications and higher mortality risk than low-morbidity (adjusted HR (95% CI): 1.57 (1.34-1.84) and 1.16 (1.05-1.28), respectively). Corticosteroids, but not tocilizumab, were associated with lower mortality risk (HR (95% CI) 0.76 (0.63-0.93)), especially in renal-morbidity and high-morbidity. Renal-morbidity and high-morbidity showed the worst lung function throughout the follow-up, with renal-morbidity having the highest risk of infectious complications (6%), emergency visits (29%) or hospital readmissions (14%) at 6 months (p
- Published
- 2022
- Full Text
- View/download PDF
135. Management and Treatment of Patients With Obstructive Sleep Apnea Using an Intelligent Monitoring System Based on Machine Learning Aiming to Improve Continuous Positive Airway Pressure Treatment Compliance: Randomized Controlled Trial
- Author
-
Cecilia Turino, Ivan D Benítez, Xavier Rafael-Palou, Ana Mayoral, Alejandro Lopera, Lydia Pascual, Rafaela Vaca, Anunciación Cortijo, Anna Moncusí-Moix, Mireia Dalmases, Eloisa Vargiu, Jordi Blanco, Ferran Barbé, and Jordi de Batlle
- Subjects
Computer applications to medicine. Medical informatics ,R858-859.7 ,Public aspects of medicine ,RA1-1270 - Abstract
BackgroundContinuous positive airway pressure (CPAP) is an effective treatment for obstructive sleep apnea (OSA), but treatment compliance is often unsatisfactory. ObjectiveThe aim of this study was to assess the effectiveness and cost-effectiveness of an intelligent monitoring system for improving CPAP compliance. MethodsThis is a prospective, open label, parallel, randomized controlled trial including 60 newly diagnosed patients with OSA requiring CPAP (Apnea–Hypopnea Index [AHI] >15) from Lleida, Spain. Participants were randomized (1:1) to standard management or the MiSAOS intelligent monitoring system, involving (1) early compliance detection, thus providing measures of patient’s CPAP compliance from the very first days of usage; (2) machine learning–based prediction of midterm future CPAP compliance; and (3) rule-based recommendations for the patient (app) and care team. Clinical and anthropometric variables, daytime sleepiness, and quality of life were recorded at baseline and after 6 months, together with patient’s compliance, satisfaction, and health care costs. ResultsRandomized patients had a mean age of 57 (SD 11) years, mean AHI of 50 (SD 27), and 13% (8/60) were women. Patients in the intervention arm had a mean (95% CI) of 1.14 (0.04-2.23) hours/day higher adjusted CPAP compliance than controls (P=.047). Patients’ satisfaction was excellent in both arms, and up to 88% (15/17) of intervention patients reported willingness to keep using the MiSAOS app in the future. No significant differences were found in costs (control: mean €90.2 (SD 53.14) (US $105.76 [SD 62.31]); intervention: mean €96.2 (SD 62.13) (US $112.70 [SD 72.85]); P=.70; €1=US $1.17 was considered throughout). Overall costs combined with results on compliance demonstrated cost-effectiveness in a bootstrap-based simulation analysis. ConclusionsA machine learning–based intelligent monitoring system increased daily compliance, reported excellent patient satisfaction similar to that reported in usual care, and did not incur in a substantial increase in costs, thus proving cost-effectiveness. This study supports the implementation of intelligent eHealth frameworks for the management of patients with CPAP-treated OSA and confirms the value of patients’ empowerment in the management of chronic diseases. Trial RegistrationClinicalTrials.gov NCT03116958; https://clinicaltrials.gov/ct2/show/NCT03116958
- Published
- 2021
- Full Text
- View/download PDF
136. La integración física, química, biológica y geográfica en el uso de la Medicina Natural y Tradicional
- Author
-
Gerson D. Benítez-Azahares
- Subjects
Medicina Natural ,medicina tradicional ,plantas medicinales ,medicina alternativa. ,Social Sciences ,Mining engineering. Metallurgy ,TN1-997 - Abstract
Se valoraron los posibles usos de la Medicina Natural y Tradicional para el tratamiento de diferentes enfermedades, teniendo en cuenta las propiedades de las plantas medicinales desde el punto de vista físico, químico y biológico, así como su localización geográfica. Se utilizaron los métodos análisis-síntesis, inducción-deducción y sistémico estructural. El uso adecuado de plantas medicinales constituye una opción de tratamiento natural que repercute de manera favorable en el mantenimiento y conservación de un buen estado de salud.
- Published
- 2020
137. Dexamethasone Causes Hypertension in Rats Even Under Chemical Blockade of Peripheral Sympathetic Nerves
- Author
-
Alexandra E. Soto-Piña, Cynthia Franklin, C. S. Sheela Rani, Elizabeth Fernandez, Elías Cardoso-Peña, Alejandra D. Benítez-Arciniega, Helmut Gottlieb, Carmen Hinojosa-Laborde, and Randy Strong
- Subjects
dexamethasone ,hypertension ,adrenal medulla ,6-OHDA ,renal denervation ,sympathetic nerves ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Synthetic glucocorticoids (GCs) are widely used to treat inflammatory conditions. However, chronic use of GCs can lead to hypertension. The cause of this undesired side effect remains unclear. Previously, we developed an in vivo rat model to study the mechanisms underlying hypertension induced by the chronic administration of the potent synthetic GC, dexamethasone (DEX) and found that the catecholamine biosynthetic pathway plays an important role. In the current study, we used this model to investigate the role of the adrenal medulla, renal nerves, and other peripheral sympathetic nerves in DEX-induced hypertension. After 5 days of baseline telemetric recording of mean arterial pressure (MAP) and heart rate (HR), rats were subjected to one of the following treatments: renal denervation (RDNX), adrenal medullectomy (ADMX), 6-hydroxydopamine (6-OHDA, 20 mg/kg, i.p.) to induce chemical sympathectomy, or a combination of ADMX and 6-OHDA. On day 11, the animals received vehicle (VEH) or DEX in drinking water for 7 days, with the latter causing an increase in MAP in control animals. ADMX and RDNX by themselves exacerbated the pressor effect of DEX. In the chemical sympathectomy group, DEX still caused a rise in MAP but the response was lower (ΔMAP of 6-OHDA/DEX < VEH/DEX, p = 0.039). However, when ΔMAP was normalized to day 10, 6-OHDA + DEX did not show any difference from VEH + DEX, certainly not an increase as observed in DEX + ADMX or RDNX groups. This indicates that sympathetic nerves do not modulate the pressor effect of DEX. TH mRNA levels increased in the adrenal medulla in both VEH/DEX (p = 0.009) and 6-OHDA/DEX (p = 0.031) groups. In the 6-OHDA group, DEX also increased plasma levels of norepinephrine (NE) (p = 0.016). Our results suggest that the activation of catecholamine synthetic pathway could be involved in the pressor response to DEX in animals even under chemical sympathectomy with 6-OHDA.
- Published
- 2019
- Full Text
- View/download PDF
138. Inulin Supplementation Reduces Systolic Blood Pressure in Women with Breast Cancer Undergoing Neoadjuvant Chemotherapy
- Author
-
Yizel Becerril-Alarcón, Saúl Campos-Gómez, Juan J. Valdez-Andrade, Karen A. Campos-Gómez, Diana Y. Reyes-Barretero, Alejandra D. Benítez-Arciniega, Roxana Valdés-Ramos, and Alexandra E. Soto-Piña
- Subjects
Therapeutics. Pharmacology ,RM1-950 ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Introduction. Breast cancer is the most frequently diagnosed malignancy in women, and comorbidities like hypertension and obesity diminish their quality of life and negatively affect their response to chemotherapy. Furthermore, inulin supplementation is associated with the reduction of cardiovascular diseases (CVD) risk. Objective. To determine whether inulin supplementation prevents the elevation of blood pressure in women with breast cancer undergoing neoadjuvant therapy with cyclophosphamide and doxorubicin. Methods. This was a randomized, double-blind placebo controlled trial which included women with early-stage breast cancer undergoing neoadjuvant therapy (n=38). Patients were randomly assigned to participate in two different groups to receive either 15 g of inulin or 15 g of placebo (maltodextrin) for 21 days. Body composition and blood pressure were evaluated before and after the supplementation period. Results. Women in the inulin group showed a lower systolic blood pressure (SBP) after the supplementation (-4.21 mmHg, p
- Published
- 2019
- Full Text
- View/download PDF
139. Assessing sleep health in a European population: Results of the Catalan Health Survey 2015.
- Author
-
Mireia Dalmases, Ivan D Benítez, Anna Mas, Oriol Garcia-Codina, Antonia Medina-Bustos, Joan Escarrabill, Esteve Saltó, Daniel J Buysse, Núria Roure, Manuel Sánchez-de-la-Torre, Montse Rué, Ferran Barbé, and Jordi de Batlle
- Subjects
Medicine ,Science - Abstract
To describe the overall sleep health of the Catalan population using data from the 2015 Catalan Health Survey and to compare the performance of two sleep health indicators: sleep duration and a 5-dimension sleep scale (SATED).Multistage probability sampling representative of the non-institutionalized population aged 15 or more years, stratified by age, gender and municipality size, was used, excluding nightshift-workers. A total of 4385 surveys were included in the analyses. Associations between sleep health and the number of reported chronic diseases were assessed using non-parametric smoothed splines. Differences in the predictive ability of age-adjusted logistic regression models of self-rated health status were assessed. Multinomial logistic regression models were used to assess SATED determinants.Overall mean (SD) sleep duration was 7.18 (1.16) hours; and SATED score 7.91 (2.17) (range 0-10), lower (worse) scores were associated with increasing age and female sex. Alertness and efficiency were the most frequently impaired dimensions across age groups. SATED performed better than sleep duration when assessing self-rated health status (area under the curve = 0.856 vs. 0.798; p-value
- Published
- 2018
- Full Text
- View/download PDF
140. To Be or Not To Be T4: Evidence of a Complex Evolutionary Pathway of Head Structure and Assembly in Giant Salmonella Virus SPN3US
- Author
-
Bazla Ali, Maxim I. Desmond, Sara A. Mallory, Andrea D. Benítez, Larry J. Buckley, Susan T. Weintraub, Michael V. Osier, Lindsay W. Black, and Julie A. Thomas
- Subjects
Salmonella ,myovirus ,giant phage ,mass spectrometry ,prohead protease ,CTS (capsid targeting sequence) ,Microbiology ,QR1-502 - Abstract
Giant Salmonella phage SPN3US has a 240-kb dsDNA genome and a large complex virion composed of many proteins for which the functions of most are undefined. We recently determined that SPN3US shares a core set of genes with related giant phages and sequenced and characterized 18 amber mutants to facilitate its use as a genetic model system. Notably, SPN3US and related giant phages contain a bolus of ejection proteins within their heads, including a multi-subunit virion RNA polymerase (vRNAP), that enter the host cell with the DNA during infection. In this study, we characterized the SPN3US virion using mass spectrometry to gain insight into its head composition and the features that its head shares with those of related giant phages and with T4 phage. SPN3US has only homologs to the T4 proteins critical for prohead shell formation, the portal and major capsid proteins, as well as to the major enzymes essential for head maturation, the prohead protease and large terminase subunit. Eight of ~50 SPN3US head proteins were found to undergo proteolytic processing at a cleavage motif by the prohead protease gp245. Gp245 undergoes auto-cleavage of its C-terminus, suggesting this is a conserved activation and/or maturation feature of related phage proteases. Analyses of essential head gene mutants showed that the five subunits of the vRNAP must be assembled for any subunit to be incorporated into the prohead, although the assembled vRNAP must then undergo subsequent major conformational rearrangements in the DNA packed capsid to allow ejection through the ~30 Å diameter tail tube for transcription from the injected DNA. In addition, ejection protein candidate gp243 was found to play a critical role in head assembly. Our analyses of the vRNAP and gp243 mutants highlighted an unexpected dichotomy in giant phage head maturation: while all analyzed giant phages have a homologous protease that processes major capsid and portal proteins, processing of ejection proteins is not always a stable/defining feature. Our identification in SPN3US, and related phages, of a diverged paralog to the prohead protease further hints toward a complicated evolutionary pathway for giant phage head structure and assembly.
- Published
- 2017
- Full Text
- View/download PDF
141. Integrative single-cell multi-omics of CD19-CAR pos and CAR neg T cells suggest drivers of immunotherapy response in B cell neoplasias.
- Author
-
Guerrero-Murillo M, Rill-Hinarejos A, Trincado JL, Bataller A, Ortiz-Maldonado V, Benítez-Ribas D, Español-Rego M, González-Navarro EA, Martínez-Cibrián N, Marchese D, Martín-Martín L, Martín García-Sancho A, Rives S, Heyn H, Juan M, Urbano-Ispizúa Á, Delgado J, Orfao A, Mereu E, Bueno C, and Menendez P
- Subjects
- Humans, Receptors, Chimeric Antigen immunology, Single-Cell Analysis, Female, Male, Immunotherapy methods, Adult, T-Lymphocytes immunology, Middle Aged, Lymphoma, Large B-Cell, Diffuse immunology, Lymphoma, Large B-Cell, Diffuse therapy, Multiomics, Antigens, CD19 immunology, Immunotherapy, Adoptive methods
- Abstract
The impact of phenotypic, clonal, and functional heterogeneity of chimeric antigen receptor (CAR)-T cells on clinical outcome remains understudied. Here, we integrate clonal kinetics with transcriptomic heterogeneity resolved by single-cell omics to interrogate cellular dynamics of non-transduced (CAR
neg ) and transduced (CARpos ) T cells, in the infusion product (IP) and at the CAR-T cell expansion peak in five B cell acute lymphoblastic leukemia (B-ALL) patients treated with CD19CAR-T cells (varni-cel). We identify significant differences in cellular dynamics in response to therapy. CARpos T cells at IP of complete response patients exhibit a significantly higher CD4:CD8 ratio, validated in a larger cohort B-ALL patients (n = 47). Conversely, at the expansion peak, there is a clonal expansion of CD8+ effector memory and cytotoxic T cells. Cytotoxic CARpos γδ-T cells expansion correlates with treatment efficacy validated in a cohort of B-ALL (n = 18) and diffuse large B cell lymphoma (DLBCL) patients (n = 58). Our data provide insights into the complexity of T cell responses following CAR-T cell therapy and suggest drivers of immunotherapy response., Competing Interests: Declaration of interests P.M. is a founder of the spin-off OneChain ImmunoTx, which has no connection with the present research. V.O.-M. reports honoraria and/or consulting fees from BMS/Celgene, Novartis, Gilead/Kite, Miltenyi Biomedicine, Pfizer, and Janssen. A.M.G.-S. reports honoraria and/or consulting fees from Roche, BMS/Celgene, Kyowa Kirin, Novartis, Gilead/Kite, Incyte, Lilly, ADC Therapeutics America, Miltenyi, Ideogen, AbbVie, and Sobi., (Copyright © 2024 The Author(s). Published by Elsevier Inc. All rights reserved.)- Published
- 2024
- Full Text
- View/download PDF
142. Serum mass spectrometry for treatment monitoring in patients with multiple myeloma receiving ARI0002h CAR T-cells.
- Author
-
Ortiz de Landazuri I, Oliver-Caldés A, Español-Rego M, Agulló C, Contreras MT, Zabaleta A, Puig N, Cabañas V, González-Calle V, Zugasti I, Inogés S, Rodríguez Otero P, Martin-Antonio B, Reguera JL, López-Diaz de Cerio A, Aróstegui JI, Uribe-Herranz M, Benítez-Ribas D, Rodríguez-Lobato LG, González EA, Tovar N, Charry P, Navarro S, Rosiñol L, Tréboles K, Mora G, Yagüe J, Moraleda JM, Urbano-Ispizua Á, Mateos MV, Pascal M, Paiva B, Juan M, and Fernández de Larrea C
- Subjects
- Humans, Male, Female, Middle Aged, Aged, Receptors, Chimeric Antigen, Myeloma Proteins analysis, Adult, Antibodies, Monoclonal, Humanized therapeutic use, B-Cell Maturation Antigen, Multiple Myeloma therapy, Multiple Myeloma blood, Immunotherapy, Adoptive methods, Mass Spectrometry methods
- Abstract
Chimeric antigen receptor (CAR) T-cell therapies have increased the patients with relapsed/refractory multiple myeloma (RRMM) in whom standard electrophoretic techniques fail to detect the M-protein. Quantitative immunoprecipitation mass spectrometry (QIP-MS) can accurately measure serum M-protein with high sensitivity, and identify interferences caused by therapeutic monoclonal antibodies. Here, we investigate the outcome of QIP-MS in 33 patients treated with the academic BCMA-directed CAR T-cell ARI0002h (Cesnicabtagene Autoleucel). QIP-MS offered more detailed insights than serum immunofixation (sIFE), identifying glycosylated M-proteins and minor additional peaks. Moreover, the potential interferences owing to daratumumab or tocilizumab treatments were successfully detected. When analysing different assay platforms during patient's monitoring after ARI0002h administration, we observed that QIP-MS showed a high global concordance (78.8%) with sIFE, whereas it was only moderate (55.6%) with bone marrow (BM)-based next-generation flow cytometry (NGF). Furthermore, QIP-MS consistently demonstrated the lowest negativity rate across the different timepoints (27.3% vs. 60.0% in months 1 and 12, respectively). Patients with QIP-MS(+)/BM-based NGF(-) showed a non-significant shorter median progression free survival than those with QIP-MS(-)/BM-based NGF(-). In summary, we show the first experience to our knowledge demonstrating that QIP-MS could be particularly useful as a non-invasive technique when evaluating response after CAR T-cell treatment in MM., (© 2024 The Author(s). British Journal of Haematology published by British Society for Haematology and John Wiley & Sons Ltd.)
- Published
- 2024
- Full Text
- View/download PDF
143. Ex Vivo Study of Colon Health, Contractility and Innervation in Male and Female Rats after Regular Exposure to Instant Cascara Beverage.
- Author
-
Gallego-Barceló P, Benítez-Álvarez D, Bagues A, Silván-Ros B, Montalbán-Rodríguez A, López-Gómez L, Vera G, Del Castillo MD, Uranga JA, and Abalo R
- Abstract
Instant Cascara (IC) is a sustainable beverage made from dried coffee cherry pulp, a by-product of coffee processing. It is rich in nutrients and bioactive compounds and has a high concentration of antioxidants. This study explored the impact of regular IC consumption on colonic motor function and innervation. Over a period of 4 weeks, male and female healthy rats were given drinking water containing 10 mg/mL of IC. Thereafter, colon samples were obtained to evaluate the longitudinal (LM) and circular (CM) smooth muscle contractile response to acetylcholine (ACh) and electrical field stimulation (EFS) in an organ bath, before and after atropine administration (10
-6 M). Histological and immunohistochemical analyses assessed colon damage, muscle thickness, and immunoreactivity to substance P (SP) and neuronal nitric oxide synthase (nNOS). ACh and EFS induced similar responses across groups, but the CM response to EFS was greater in females compared with males, despite their lower body weight. Atropine completely blocked the response to ACh but only partially antagonized the neural response to EFS, particularly that of CM in females treated with IC, which had a greater liquid intake than those exposed to water. However, in the myenteric ganglia, no statistically significant differences were observed in SP or nNOS. Our results suggest that regular IC exposure may enhance specific neural pathway functions, particularly in females, possibly due to their increased IC consumption.- Published
- 2024
- Full Text
- View/download PDF
144. DistilIQA: Distilling Vision Transformers for no-reference perceptual CT image quality assessment.
- Author
-
Baldeon-Calisto M, Rivera-Velastegui F, Lai-Yuen SK, Riofrío D, Pérez-Pérez N, Benítez D, and Flores-Moyano R
- Subjects
- Humans, Neural Networks, Computer, Tomography, X-Ray Computed methods
- Abstract
No-reference image quality assessment (IQA) is a critical step in medical image analysis, with the objective of predicting perceptual image quality without the need for a pristine reference image. The application of no-reference IQA to CT scans is valuable in providing an automated and objective approach to assessing scan quality, optimizing radiation dose, and improving overall healthcare efficiency. In this paper, we introduce DistilIQA, a novel distilled Vision Transformer network designed for no-reference CT image quality assessment. DistilIQA integrates convolutional operations and multi-head self-attention mechanisms by incorporating a powerful convolutional stem at the beginning of the traditional ViT network. Additionally, we present a two-step distillation methodology aimed at improving network performance and efficiency. In the initial step, a "teacher ensemble network" is constructed by training five vision Transformer networks using a five-fold division schema. In the second step, a "student network", comprising of a single Vision Transformer, is trained using the original labeled dataset and the predictions generated by the teacher network as new labels. DistilIQA is evaluated in the task of quality score prediction from low-dose chest CT scans obtained from the LDCT and Projection data of the Cancer Imaging Archive, along with low-dose abdominal CT images from the LDCTIQAC2023 Grand Challenge. Our results demonstrate DistilIQA's remarkable performance in both benchmarks, surpassing the capabilities of various CNNs and Transformer architectures. Moreover, our comprehensive experimental analysis demonstrates the effectiveness of incorporating convolutional operations within the ViT architecture and highlights the advantages of our distillation methodology., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Ltd. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
145. Multifunctional Organometallic Compounds Active against Infective Trypanosomes: Ru(II) Ferrocenyl Derivatives with Two Different Bioactive Ligands.
- Author
-
Rivas F, Del Mármol C, Scalese G, Pérez Díaz L, Machado I, Blacque O, Salazar F, Coitiño EL, Benítez D, Medeiros A, Comini M, and Gambino D
- Subjects
- Ligands, Animals, Mice, Metallocenes chemistry, Metallocenes pharmacology, Metallocenes chemical synthesis, Trypanosoma brucei brucei drug effects, Parasitic Sensitivity Tests, Molecular Structure, Organometallic Compounds pharmacology, Organometallic Compounds chemistry, Organometallic Compounds chemical synthesis, Coordination Complexes pharmacology, Coordination Complexes chemistry, Coordination Complexes chemical synthesis, Ferrous Compounds chemistry, Ferrous Compounds pharmacology, Ferrous Compounds chemical synthesis, Trypanosoma cruzi drug effects, Trypanocidal Agents pharmacology, Trypanocidal Agents chemistry, Trypanocidal Agents chemical synthesis, Ruthenium chemistry, Ruthenium pharmacology
- Abstract
Human African trypanosomiasis (HAT, sleeping sickness) and American trypanosomiasis (Chagas disease) are endemic zoonotic diseases caused by genomically related trypanosomatid protozoan parasites ( Trypanosoma brucei and Trypanosoma cruzi , respectively). Just a few old drugs are available for their treatment, with most of them sharing poor safety, efficacy, and pharmacokinetic profiles. Only fexinidazole has been recently incorporated into the arsenal for the treatment of HAT. In this work, new multifunctional Ru(II) ferrocenyl compounds were rationally designed as potential agents against these pathogens by including in a single molecule 1,1'-bis(diphenylphosphino)ferrocene (dppf) and two bioactive bidentate ligands: pyridine-2-thiolato-1-oxide ligand (mpo) and polypyridyl ligands (NN). Three [Ru(mpo)(dppf)(NN)](PF
6 ) compounds and their derivatives with chloride as a counterion were synthesized and fully characterized in solid state and solution. They showed in vitro activity on bloodstream T. brucei (EC50 = 31-160 nM) and on T. cruzi trypomastigotes (EC50 = 190-410 nM). Compounds showed the lowest EC50 values on T. brucei when compared to the whole set of metal-based compounds previously developed by us. In addition, several of the Ru compounds showed good selectivity toward the parasites, particularly against the highly proliferative bloodstream form of T. brucei . Interaction with DNA and generation of reactive oxygen species (ROS) were ruled out as potential targets and modes of action of the Ru compounds. Biochemical assays and in silico analysis led to the insight that they are able to inhibit the NADH-dependent fumarate reductase from T. cruzi . One representative hit induced a mild oxidation of low molecular weight thiols in T. brucei . The compounds were stable for at least 72 h in two different media and more lipophilic than both bioactive ligands, mpo and NN. An initial assessment of the therapeutic efficacy of one of the most potent and selective candidates, [Ru(mpo)(dppf)(bipy)]Cl, was performed using a murine infection model of acute African trypanosomiasis. This hit compound lacks acute toxicity when applied to animals in the dose/regimen described, but was unable to control parasite proliferation in vivo , probably because of its rapid clearance or low biodistribution in the extracellular fluids. Future studies should investigate the pharmacokinetics of this compound in vivo and involve further research to gain deeper insight into the mechanism of action of the compounds.- Published
- 2024
- Full Text
- View/download PDF
146. Casein kinase 2 phosphorylates and induces the SALL2 tumor suppressor degradation in colon cancer cells.
- Author
-
Hermosilla VE, Gyenis L, Rabalski AJ, Armijo ME, Sepúlveda P, Duprat F, Benítez-Riquelme D, Fuentes-Villalobos F, Quiroz A, Hepp MI, Farkas C, Mastel M, González-Chavarría I, Jackstadt R, Litchfield DW, Castro AF, and Pincheira R
- Subjects
- Animals, Humans, DNA-Binding Proteins metabolism, Transcription Factors genetics, Transcription Factors metabolism, Cell Line, Tumor, Casein Kinase II, Colonic Neoplasms genetics
- Abstract
Spalt-like proteins are Zinc finger transcription factors from Caenorhabditis elegans to vertebrates, with critical roles in development. In vertebrates, four paralogues have been identified (SALL1-4), and SALL2 is the family's most dissimilar member. SALL2 is required during brain and eye development. It is downregulated in cancer and acts as a tumor suppressor, promoting cell cycle arrest and cell death. Despite its critical functions, information about SALL2 regulation is scarce. Public data indicate that SALL2 is ubiquitinated and phosphorylated in several residues along the protein, but the mechanisms, biological consequences, and enzymes responsible for these modifications remain unknown. Bioinformatic analyses identified several putative phosphorylation sites for Casein Kinase II (CK2) located within a highly conserved C-terminal PEST degradation motif of SALL2. CK2 is a serine/threonine kinase that promotes cell proliferation and survival and is often hyperactivated in cancer. We demonstrated that CK2 phosphorylates SALL2 residues S763, T778, S802, and S806 and promotes SALL2 degradation by the proteasome. Accordingly, pharmacological inhibition of CK2 with Silmitasertib (CX-4945) restored endogenous SALL2 protein levels in SALL2-deficient breast MDA-MB-231, lung H1299, and colon SW480 cancer cells. Silmitasertib induced a methuosis-like phenotype and cell death in SW480 cells. However, the phenotype was significantly attenuated in CRISPr/Cas9-mediated SALL2 knockout SW480 cells. Similarly, Sall2-deficient tumor organoids were more resistant to Silmitasertib-induced cell death, confirming that SALL2 sensitizes cancer cells to CK2 inhibition. We identified a novel CK2-dependent mechanism for SALL2 regulation and provided new insights into the interplay between these two proteins and their role in cell survival and proliferation., (© 2024. The Author(s).)
- Published
- 2024
- Full Text
- View/download PDF
147. The academic point-of-care anti-CD19 chimeric antigen receptor T-cell product varnimcabtagene autoleucel (ARI-0001 cells) shows efficacy and safety in the treatment of relapsed/refractory B-cell non-Hodgkin lymphoma.
- Author
-
Martínez-Cibrián N, Ortiz-Maldonado V, Español-Rego M, Blázquez A, Cid J, Lozano M, Magnano L, Giné E, Correa JG, Mozas P, Rodríguez-Lobato LG, Rivero A, Montoro-Lorite M, Ayora P, Navarro S, Alserawan L, González-Navarro EA, Castellà M, Sánchez-Castañón M, Cabezón R, Benítez-Ribas D, Setoaín X, Rodríguez S, Brillembourg H, Varea S, Olesti E, Guillén E, Sáez-Peñataro J, de Larrea CF, López-Guillermo A, Pascal M, Urbano-Ispizua Á, Juan M, and Delgado J
- Subjects
- Humans, Point-of-Care Systems, Immunotherapy, Adoptive adverse effects, Antibodies, Antigens, CD19, T-Lymphocytes, Receptors, Chimeric Antigen, Lymphoma, B-Cell therapy, Lymphoma, Non-Hodgkin therapy, Precursor Cell Lymphoblastic Leukemia-Lymphoma therapy
- Abstract
Varnimcabtagene autoleucel (var-cel) is an academic anti-CD19 chimeric antigen receptor (CAR) product used for the treatment of non-Hodgkin lymphoma (NHL) in the CART19-BE-01 trial. Here we report updated outcomes of patients with NHL treated with var-cel. B-cell recovery was compared with patients with acute lymphoblastic leukaemia (ALL). Forty-five patients with NHL were treated. Cytokine release syndrome (any grade) occurred in 84% of patients (4% grade ≥3) and neurotoxicity in 7% (2% grade ≥3). The objective response rate was 73% at Day +100, and the 3-year duration of response was 56%. The 3-year progression-free and overall survival were 40% and 52% respectively. High lactate dehydrogenase was the only covariate with an impact on progression-free survival. The 3-year incidence of B-cell recovery was lower in patients with NHL compared to ALL (25% vs. 60%). In conclusion, in patients with NHL, the toxicity of var-cel was manageable, while B-cell recovery was significantly prolonged compared to ALL. This trial was registered as NCT03144583., (© 2023 The Authors. British Journal of Haematology published by British Society for Haematology and John Wiley & Sons Ltd.)
- Published
- 2024
- Full Text
- View/download PDF
148. Usefulness of mindfulness for the management of anxiety, stress, and quality of life in infertile women. A clinical exploratory study.
- Author
-
Luz IJH, López-Alarcón M, Vital-Reyes VS, Benítez-Moreno D, and Luz ÓH
- Subjects
- Humans, Female, Adult, Surveys and Questionnaires, Follow-Up Studies, Mindfulness methods, Quality of Life, Infertility, Female therapy, Infertility, Female psychology, Stress, Psychological therapy, Anxiety therapy, Anxiety etiology, Hydrocortisone
- Abstract
Background: Infertility increases stress and affects life quality. Mindfulness reduces stress and improves life quality, but its role in infertility remains unclear., Objective: To evaluate the effect of mindfulness on stress and quality of life of women with infertility., Material and Methods: An exploratory clinical study was conducted in women under infertility treatment, together with an 8-week mindfulness intervention (MND) or only infertility treatment (CTRL). Anxiety and quality of life were assessed at baseline and at the end of intervention with IDARE and FertiQoL questionnaires respectively, as well as salivary alpha-amylase and cortisol concentrations. Non-parametric statistics was used for analysis using an alpha value of 0.10., Results: 14 MND and 15 CTRL completed follow-up. At baseline, CTRL patients exhibited better quality of life than MND; anxiety scores correlated negatively with quality of life. At the end of intervention, cortisol concentrations (p = 0.097), and the increments of amylase (p = 0.039), were higher in CTRL than in MND. Increases in quality of life were associated with basal anxiety score (p = 0.002), improvements in tolerability (p < 0.001), and mindfulness intervention (p = 0.014)., Conclusion: Our results suggest that mindfulness reduces stress and improves quality of life in women under infertility treatment., (Copyright: © 2024 Permanyer.)
- Published
- 2024
- Full Text
- View/download PDF
149. Association of drought conditions and heavy rainfalls with the quality of drinking water in Barcelona (2010-2022).
- Author
-
Benítez-Cano D, González-Marín P, Gómez-Gutiérrez A, Marí-Dell'Olmo M, and Oliveras L
- Subjects
- Humans, Droughts, Nickel, Retrospective Studies, Climate Change, Drinking Water
- Abstract
Background: Climate change influences the incidence and scope of climate extreme events that affect communities and the environment around the world. In an urban context such as Barcelona, these climate extremes can have a negative impact on drinking water quality. The worsening of drinking water quality can have important repercussions on human health, leading to the appearance of different diseases., Objective: Investigate the association between climate extremes, in particular heavy rainfall events and drought conditions, and the drinking water quality in the city of Barcelona from 2010 to 2022., Methods: We conducted a daily retrospective time-series study using data covering 13 years of daily monitoring of conductivity, nickel, turbidity and trihalomethanes parameters of raw water in the Llobregat River catchment area and treated water in the Drinking Water Treatment Plant (DWTP) Sant Joan Despí. We used river flow as a proxy for drought conditions and heavy rainfall events. We analyzed short-term associations between river flow rate and quality parameters in raw and treated water using generalized linear regression with distributed lag-non-linear models (DLNM)., Results: A low flow, as an indicator of drought condition or low rainfall, was significantly associated with an increase in conductivity in raw water and nickel in both raw and treated water. A high flow, as an indicator of heavy rainfall events, was significantly associated with an increase of turbidity in raw water, and a decrease in all other quality parameters., Impact Statement: This study provides novel evidence that climate extremes have an impact on the quality of drinking water in urban areas with a Mediterranean climate. The findings of this study are significant because they suggest that as the frequency and intensity of climate extremes increase due to climate change, there will be further challenges in managing and treating drinking water, which could have a detrimental effect on public health. This study serves as an important reminder of the need to strengthen and accelerate adaptation actions in water management to ensure an adequate supply of drinking water that protects the people's health., (© 2023. The Author(s), under exclusive licence to Springer Nature America, Inc.)
- Published
- 2024
- Full Text
- View/download PDF
150. Evaluation of the Effects of Instant Cascara Beverage on the Brain-Gut Axis of Healthy Male and Female Rats.
- Author
-
Gallego-Barceló P, Bagues A, Benítez-Álvarez D, López-Tofiño Y, Gálvez-Robleño C, López-Gómez L, Del Castillo MD, and Abalo R
- Subjects
- Female, Male, Rats, Animals, Rats, Wistar, Body Weight, Health Status, Brain-Gut Axis, Beverages
- Abstract
Instant cascara (IC) is a sustainable beverage obtained from dried coffee cherry pulp, rich in nutrients and bioactive compounds. The present research aimed to determine the effects of IC on general health and brain-gut axis parameters of healthy female and male rats. Wistar rats were exposed to IC (10 mg/mL) in their drinking water for 3 weeks. Body weight and solid and liquid intakes were monitored as indicators of food safety. Gastrointestinal transit was radiographically evaluated one day (acute) and 3 weeks (chronic) after the start of IC exposure. Locomotor activity, anxiety, and anhedonia of the animals after 3 weeks of treatment was also studied. Overall, compared to water-exposed animals, IC significantly increased food intake in males ( p < 0.0001) and liquid intake in females ( p < 0.05) without changes in body weight in either case. IC did not significantly modify gastrointestinal motility parameters after its acute or repeated intake and did not cause any significant behavioral alterations in males or females ( p > 0.05). In conclusion, repeated intake of IC at the studied concentration did not negatively affect brain-gut axis functions of healthy male and female rats. Anxiety behavior, diarrhea, constipation, abnormal weight modifications, or other typical effects of toxicity were not observed in animals treated with the new powdered beverage, suggesting its food safety under the studied conditions.
- Published
- 2023
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.