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Víctor Navas-Portella, Isabel Serra, Álvaro Corral, Eduard Vives
Power-law-type probability density functions spanning several orders of magnitude are found for different avalanche properties. We propose a methodology to overcome empirical constraints that limit the range of truncated power-law distributions. By considering catalogs of events that cover different observation windows, the maximum likelihood estimation of a global power-law exponent is computed. This methodology is applied to amplitude and energy distributions of acoustic emission avalanches in failure-under-compression experiments of a nanoporous silica glass, finding in some cases global exponents in an unprecedented broad range: 4...
February 2018: Physical Review. E
Diego Brancaccio, Donatella Diana, Salvatore Di Maro, Francesco Saverio Di Leva, Stefano Tomassi, Roberto Fattorusso, Luigi Russo, Stefania Scala, Anna Maria Trotta, Luigi Portella, Ettore Novellino, Luciana Marinelli, Alfonso Carotenuto
Peptides-binding G protein-coupled receptors play an important role in many pathological and physiological pathways. The assessment of the receptor-bound conformation of a peptidic ligand within a membrane receptor such as a GPCR is of outmost importance for a rational drug design of more potent analogues. In this work, we applied multiple ligand-based NMR methods to study the interaction of peptide heptamers, derived from the C-X-C Motif Chemokine 12 (CXCL12), and the C-X-C Chemokine Receptor Type 4 (CXCR4) on membranes of human T-Leukemia cells (CCRF-CEM cells)...
March 9, 2018: Journal of Medicinal Chemistry
Glauber Cruz Lima, Yuri de Abreu Gomes Vasconcelos, Marilia Trindade de Santana Souza, Alan Santos Oliveira, Rangel Rodrigues Bomfim, Ricardo Luiz Cavalcanti de Albuquerque Júnior, Enilton Aparecido Camargo, Viviane Gomes Portella, Andrelina Noronha Coelho-de-Souza, Lúcio Ricardo Leite Diniz
No specific therapeutics are available for the treatment of sepsis-induced liver dysfunction, a clinical complication strongly associated with the high mortality rate of septic patients. This study investigated the effect of the essential oil of Hyptis crenata (EOHc), a lamiaceae plant used to treat liver disturbances in Brazilian folk medicine, on liver function during early sepsis. Sepsis was induced by the cecal ligation and puncture (CLP) model. Rats were divided into four groups: Sham, Sham+EOHc, CLP, and CLP+EOHc...
February 28, 2018: Journal of Medicinal Food
M Vicent-Gil, A Keymer-Gausset, M Serra-Blasco, M Carceller-Sindreu, J de Diego-Adeliño, J Trujols, M Mur, V Pérez, E Alvarez, N Cardoner, M J Portella
Major Depressive Disorder (MDD) entails cognitive dysfunction in many cognitive domains, but it is still uncertain whether such deficits are present in the early stages. The purpose of the study is to determine the cognitive performance in first episode depression (FED) exploring the presence of different cognitive profiles, and the role of cognition in FED at baseline and long-term. Ninety subjects (18-50 years) were included, 50 patients with a FED and 40 healthy controls. Participants were assessed with a neuropsychological battery, covering language, attention, verbal memory, processing speed and executive domains...
February 23, 2018: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
Mariana Ribeiro Silva, Cristine Lima Alberton, Elisa Gouvêa Portella, Gabriela Neves Nunes, Daniela Gomez Martin, Stephanie Santana Pinto
This study aimed to investigate the effects of two water-based training programs (aerobic and combined) and a non-periodized physical activity program on functional capacity and quality of life (QoL) of elderly women. Forty-one elderly female volunteers (65 ± 4 years) were divided into three groups: aerobic training group (WBA, n = 13), combined training (sequence: resistance/aerobic; WBC; n = 11) and a control group of non-periodized physical activity program (CG, n = 9). The participants performed the water-based trainings twice a week for 12 weeks...
February 21, 2018: Experimental Gerontology
Keila Modesto Tramonte, Rubens Cesar Lopes Figueira, Alessandra Pereira Majer, Paulo Alves de Lima Ferreira, Miriam Fernanda Batista, Andreza Portella Ribeiro, Michel Michaelovitch de Mahiques
The Cananéia-Iguape system is located in a coastal region of southeastern Brazil, recognized by UNESCO as an Atlantic Forest Biosphere Reserve. This system has suffered substantial environmental impacts due to the opening of an artificial channel and by past intensive mining activities. In this paper was performed the sequential chemical extraction of Cu, Pb, and Zn, on previously described sediment cores, and the statistical treatment of the data, allowing to estimate the remobilization geochemical behavior, the available content and the trend of accumulation between 1926 and 2008...
February 2018: Marine Pollution Bulletin
Djordje Spasojević, Svetislav Mijatović, Víctor Navas-Portella, Eduard Vives
We present extensive numerical studies of the crossover from three-dimensional to two-dimensional systems in the nonequilibrium zero-temperature random-field Ising model with metastable dynamics. Bivariate finite-size scaling hypotheses are presented for systems with sizes L×L×l which explain the size-driven critical crossover from two dimensions (l=const, L→∞) to three dimensions (l∝L→∞). A model of effective critical disorder R_{c}^{eff}(l,L) with a unique fitting parameter and no free parameters in the R_{c}^{eff}(l,L→∞) limit is proposed, together with expressions for the scaling of avalanche distributions bringing important implications for related experimental data analysis, especially in the case of thin three-dimensional systems...
January 2018: Physical Review. E
Fabiana de Almeida Andrade, Caio Fabio Schlechta Portella
The scientific literature presents a modest amount of evidence in the use of complementary and alternative medicine (CAM). On the other hand, in practice, relevant results are common. The debates among CAM practitioners about the quality and execution of scientific research are important. Therefore, the aim of this review is to gather, synthesize and describe the differentiated methodological models that encompass the complexity of therapeutic interventions. The process of bringing evidence-based medicine into clinical practice in CAM is essential for the growth and strengthening of complementary medicines worldwide...
January 2018: Journal of Integrative Medicine
Antonio C B Nunes Filho, Marcelo Katz, Carlos M Campos, Luiz A Carvalho, Dimytri A Siqueira, Rogério T Tumelero, Antenor L F Portella, Vinícius Esteves, Marco A Perin, Rogério Sarmento-Leite, Pedro A Lemos Neto, Flavio Tarasoutchi, Hiram G Bezerra, Fábio S de Brito
INTRODUCTION AND OBJECTIVES: Acute kidney injury (AKI) is frequently observed after transcatheter aortic valve implantation (TAVI) and is associated with higher mortality. However, the impact of AKI on long-term outcomes remains controversial. Therefore, we sought to evaluate the impact of AKI on short- and long-term outcomes following TAVI using the Valve Academic Research Consortium 2 criteria. METHODS: Consecutive patients (n = 794) with severe aortic stenosis who underwent TAVI were included in a multicenter Brazilian registry...
January 18, 2018: Revista Española de Cardiología
Alejandro Keymer-Gausset, Anna Alonso-Solís, Iluminada Corripio, Rosa B Sauras-Quetcuti, Edith Pomarol-Clotet, Erick J Canales-Rodriguez, Eva Grasa-Bello, Enric Álvarez, Maria J Portella
Previous works have studied structural brain characteristics in first-episode psychosis (FEP), but few have focused on the relation between brain differences and illness trajectories. The aim of this study is to analyze gray and white matter changes in FEP patients and their relation with one-year clinical outcomes. A sample of 41 FEP patients and 41 healthy controls (HC), matched by age and educational level was scanned with a 3T MRI during the first month of illness onset. One year later, patients were assigned to two illness trajectories (schizophrenia and non-schizophrenia)...
January 12, 2018: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
Raül Triay-Portella, Aitor Escribano, José G Pajuelo, Fernando Tuya
Ecologists aim at disentangling how species vary in abundance through spatial and temporal scales, using a range of sampling techniques. Here, we investigated the circadian rhythm of seagrass-associated decapod crustaceans through three sampling techniques. Specifically, we compared the abundance, biomass and structure of seagrass-associated decapod assemblages between the day and night using a hand net, an airlift pump and baited traps. At night, the hand-net consistently collected a larger total abundance and biomass of decapods, what resulted in significant diel differences, which were detected for the total biomass, but not for the total abundance, when decapods were sampled through an airlift pump...
January 5, 2018: Marine Environmental Research
Guilherme Pires Amaral, Fernando Dobrachinski, Nelson Rodrigues de Carvalho, Rômulo Pillon Barcelos, Michele Hinerasky da Silva, Thiago Henrique Lugokenski, Glaecir Roseni Mundstock Dias, Rafael de Lima Portella, Roselei Fachinetto, Félix Alexandre Antunes Soares
The high levels of oxidative stress and inflammation can be present in the etiology of degenerative intestinal pathologies associated with ethanol ingestion. The Rosmarinus officinalis L. has exhibited several physiological and medicinal activities. In this investigation, we intended to clarify, for the first time, the antioxidant and anti-inflammatory effects of ethanolic extract of Rosmarinus officinalis L. (eeRo) against an acute damage induced by ethanol, specifically in the small intestine of rats. The rats were treated three times, at every 24 h, with eeRo at 500-1000 mg/kg or vehicle, oral gavage...
December 26, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Moshe Mittelman, Uwe Platzbecker, Boris Afanasyev, Sebastian Grosicki, Raymond S M Wong, Achilles Anagnostopoulos, Benjamin Brenner, Claudio Denzlinger, Giuseppe Rossi, Arnon Nagler, Regina Garcia-Delgado, Maria Socorro O Portella, Zewen Zhu, Dominik Selleslag
BACKGROUND: Thrombocytopenia is a life-threatening complication in patients with advanced myelodysplastic syndromes (MDS) and acute myeloid leukaemia (AML). In this study (ASPIRE), we aimed to assess eltrombopag, an oral thrombopoietin receptor agonist, for thrombocytopenia (grade 4) treatment in adult patients with advanced MDS or AML. METHODS: ASPIRE consisted of an open-label, double-blind phase for 8 weeks and a randomised, double-blind phase (parts 1 and 2, reported here) for 12 weeks, and an open-label extension (part 3)...
December 11, 2017: Lancet Haematology
Salvatore Di Maro, Francesco Saverio Di Leva, Anna Maria Trotta, Diego Brancaccio, Luigi Portella, Michela Aurilio, Stefano Tomassi, Anna Messere, Deborah Sementa, Secondo Lastoria, Alfonso Carotenuto, Ettore Novellino, Stefania Scala, Luciana Marinelli
In our ongoing pursuit of CXCR4 antagonists as potential anticancer agents, we recently developed a potent, selective and plasma stable peptide, Ac-Arg-Ala-[D-Cys-Arg-Phe-Phe-Cys]-COOH (3). Nevertheless, this compound was still not enough potent (IC50 ≈ 53 nM) to enter preclinical studies. Thus, a lead-optimization campaign was here undertaken to further improve the binding affinity of 3 while preserving its selectivity and proteolytic stability. Specifically, extensive structure-activity relationships (SARs) investigations were carried out on both its aromatic and disulfide forming amino acids...
November 10, 2017: Journal of Medicinal Chemistry
Andrea Delgado, Guillermo Llerena, Rosmary Lopez, Jimmy Portella, Naomi Inoue, Luis Noriega-Hoces, Luis Guzman
PGD for HLA typing is a procedure that can be performed when an affected child requires a transplant to treat a non-hereditary disorder related to the hematopoietic and/or immune system. Hematopoietic stem cell transplantation from an HLA-identical donor provides the best treatment option. Three conventional ovarian stimulation procedures for IVF were performed in a couple with a 10-year-old child diagnosed with T-cell acute lymphoblastic leukemia of high risk. Trophectoderm biopsy and aCGH examination were performed on 15 blastocysts, three on the first IVF procedure, four on the second cycle, and eight on the third...
December 1, 2017: JBRA Assisted Reproduction
Albert F Adiyatullin, Mitchell D Anderson, Hugo Flayac, Marcia T Portella-Oberli, Fauzia Jabeen, Claudéric Ouellet-Plamondon, Gregory C Sallen, Benoit Deveaud
The use of a Kerr nonlinearity to generate squeezed light is a well-known way to surpass the quantum noise limit along a given field quadrature. Nevertheless, in the most common regime of weak nonlinearity, a single Kerr resonator is unable to provide the proper interrelation between the field amplitude and squeezing required to induce a sizable deviation from Poissonian statistics. We demonstrate experimentally that weakly coupled bosonic modes allow exploration of the interplay between squeezing and displacement, which can give rise to strong deviations from the Poissonian statistics...
November 6, 2017: Nature Communications
Silviane Galvan Pereira, Claudia Benedita Dos Santos, Marlene Doring, Marilene Rodrigues Portella
OBJECTIVE: to identify the prevalence of falls among older adults and the extrinsic factors associated with them. METHOD: population-based cross-sectional study with 350 older adults. A household survey was conducted using a questionnaire addressing socio-demographic, clinical, and environmental characteristics. Data were analyzed using Stata Software V.10. Pearson's chi-square test and logistic regression analysis were used with stepwise criteria for selection of variables in the model, with measures of effect expressed in Prevalence Ratio...
October 19, 2017: Revista Latino-americana de Enfermagem
João Rafael de Oliveira Dias, Renata Portella Nunes, Raquel Goldhardt
PURPOSE: To discuss the characteristics, indications and adverse events (AEs) of sustained-release corticosteroid devices for the treatment of cystoid macular edema (CME). RECENT FINDINGS: Ozurdex® is approved for the treatment of diabetic macular edema (DME), retinal vein occlusion related-CME and noninfectious posterior uveitis (NIPU). It releases dexamethasone over a maximum period of 6 months making repeated intravitreal injections necessary for recurrent CME...
June 2017: Current Ophthalmology Reports
Raymond S M Wong, Mansoor N Saleh, Abderrahim Khelif, Abdulgabar Salama, Maria Socorro O Portella, Paul Burgess, James B Bussel
In phase 2/3 trials, eltrombopag treatment of 6 months or less in patients with chronic/persistent immune thrombocytopenia (ITP) increased platelet counts and reduced bleeding. The open-label EXTEND study evaluated long-term safety and efficacy of eltrombopag in adults with ITP who had completed a previous eltrombopag study. For the 302 patients enrolled, median duration of eltrombopag treatment was 2.37 years (2 days-8.76 years). Median platelet counts increased to 50 × 109 /L or more by week 2 and were sustained throughout the treatment period...
December 7, 2017: Blood
Conrad Molins, Mar Carceller-Sindreu, Helena Navarro, Cristina Carmona, Marina Piñeiro, Estrella Martínez, Enric Álvarez, Maria J Portella
Cognitive symptoms play a central role in schizophrenia and are strongly associated with social functioning. Treatment with clozapine presents controversial results regarding its effects on cognition. The opposite effects of clozapine and n-desmethylclozapine (NDMC) on cholinergic system have been suggested to underlie these inconclusive findings. The aim of this study is to determine whether clozapine/NDMC ratio can predict cognitive performance in patients with treatment-resistant psychosis. Nineteen clinically stable patients with schizophrenia or schizoaffective disorder treated with clozapine monotherapy completed demographic and clinical interviews...
December 2017: Psychiatry Research
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