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Danielle Oliveira Dos Anjos, Eliomara Sousa Sobral Alves, Vinicius Tomaz Gonçalves, Sheila Suarez Fontes, Mateus Lima Nogueira, Ana Márcia Suarez-Fontes, João Batista Neves da Costa, Fabricio Rios-Santos, Marcos André Vannier-Santos
Natural products comprise valuable sources for new antiparasitic drugs. Here we tested the effects of a novel β-lapachone derivative on Trypanosoma cruzi parasite survival and proliferation and used microscopy and cytometry techniques to approach the mechanism(s) underlying parasite death. The selectivity index determination indicate that the compound trypanocidal activity was over ten-fold more cytotoxic to epimastigotes than to macrophages or splenocytes. Scanning electron microscopy analysis revealed that the R72 β-lapachone derivative affected the T...
October 12, 2016: International Journal for Parasitology, Drugs and Drug Resistance
Priscilla Hakime Scalize, Karina F Bombonato-Prado, Luiz Gustavo de Sousa, Adalberto Luiz Rosa, Marcio Mateus Beloti, Marisa Semprini, Rossano Gimenes, Adriana L G de Almeida, Fabíola Singaretti de Oliveira, Simone Cecilio Hallak Regalo, Selma Siessere
Osteoporosis is a chronic disease that impairs proper bone remodeling. Guided bone regeneration is a surgical technique that improves bone defect in a particular region through new bone formation, using barrier materials (e.g. membranes) to protect the space adjacent to the bone defect. The polytetrafluorethylene membrane is widely used in guided bone regeneration, however, new membranes are being investigated. The purpose of this study was to evaluate the effect of P(VDFTrFE)/BT [poly(vinylidene fluoride-trifluoroethylene)/barium titanate] membrane on in vivo bone formation...
December 2016: Journal of Materials Science. Materials in Medicine
G Ferreira-Dias, L Mateus, M R Rebordão, L L da Costa, A M Rocha, E Bettencourt, R P Carreira
No abstract text is available yet for this article.
October 2016: Reproduction in Domestic Animals, Zuchthygiene
Rodrigo Fabrizzio Inácio, Renata Gacielle Zanon, Mateus Vidigal de Castro, Henrique Marques de Souza, Marcio Chaim Bajgelman, Liana Verinaud, Alexandre Leite Rodrigues de Oliveira
Astrocytes are multifunctional glial cells that actively participate in synaptic plasticity in health and disease. Little is known about molecular interactions between neurons and glial cells that result in synaptic stability or elimination. In this sense, the main histocompatibility complex of class I (MHC I) has been shown to play a role in the synaptic plasticity process during development and after lesion of the CNS. MHC I levels in neurons appear to be influenced by astrocyte secreted molecules, which may generate endoplasmic reticulum stress...
October 14, 2016: Neuroscience Letters
Pedro David Carvalho, Cátia Duarte, Elsa Vieira-Sousa, Luís Cunha-Miranda, Pedro Avila-Ribeiro, Helena Santos, Miguel Bernardes, Maria José Santos, Marcos Cerqueira, Margarida Mateus, Patrícia Nero, Ana Águeda, José António Pereira da Silva, Pedro Machado
Psoriatic arthritis (PsA) is a chronic inflammatory rheumatic disease with a broad clinical spectrum. PsA can affect the axial skeleton, peripheral joints, entheses, synovial sheaths of tendons, skin, nails and extra-articular organs. Tumour necrosis factor alpha blockers (TNF blockers) were a breakthrough development in the treatment of PsA. Identifying predictors of response to biological therapies in patients with PsA is of utmost importance, especially in view of the costs and potential side effects of these agents...
August 17, 2016: Acta Reumatológica Portuguesa
Loïc Peter, Diana Mateus, Pierre Chatelain, Denis Declara, Noemi Schworm, Stefan Stangl, Gabriele Multhoff, Nassir Navab
The examination of biopsy samples plays a central role in the diagnosis and staging of numerous diseases, including most cancer types. However, because of the large size of the acquired images, the localization and quantification of diseased portions of a tissue is usually time-consuming, as pathologists must scroll through the whole slide to look for objects of interest which are often only scarcely distributed. In this work, we introduce an approach to facilitate the visual inspection of large digital histopathological slides...
October 5, 2016: Medical Image Analysis
Mabel Bohorquez, Ruta Sahasrabudhe, Angel Criollo, María Carolina Sanabria-Salas, Alejandro Vélez, Jorge Mario Castro, Juan Ricardo Marquez, Gilbert Mateus, Fernando Bolaños, Cesar Panqueva, Jose Ignacio Restrepo, Juan Dario Puerta, Raul Murillo, María Mercedes Bravo, Gustavo Hernández, Angela Rios, Rodrigo Prieto, Ian Tomlinson, Magdalena Echeverry, Luis G Carvajal-Carmona
Colorectal cancer (CRC) is a major public health problem, and its incidence is rising in developing countries. However, studies characterizing CRC clinicopathological features in cases from developing countries are still lacking. The goal of this study was to evaluate clinicopathological and demographic features in one of the largest CRC studies in Latin America.The study involved over 1525 CRC cases recruited in a multicenter study in Colombia between 2005 and 2014 as part of ongoing genetic and epidemiological studies...
October 2016: Medicine (Baltimore)
L Caetano, H Pinheiro, P Patrício, A Mateus-Pinheiro, N D Alves, B Coimbra, F I Baptista, S N Henriques, C Cunha, A R Santos, S G Ferreira, V M Sardinha, J F Oliveira, A F Ambrósio, N Sousa, R A Cunha, A J Rodrigues, L Pinto, C A Gomes
Developmental risk factors, such as the exposure to stress or high levels of glucocorticoids (GCs), may contribute to the pathogenesis of anxiety disorders. The immunomodulatory role of GCs and the immunological fingerprint found in animals prenatally exposed to GCs point towards an interplay between the immune and the nervous systems in the etiology of these disorders. Microglia are immune cells of the brain, responsive to GCs and morphologically altered in stress-related disorders. These cells are regulated by adenosine A2A receptors, which are also involved in the pathophysiology of anxiety...
October 11, 2016: Molecular Psychiatry
Guilherme Klafke, Anelise Webster, Bruno Dall Agnol, Endrigo Pradel, Jeniffer Silva, Luiz Henrique de La Canal, Marcelo Becker, Mateus Felipe Osório, Melanie Mansson, Rafael Barreto, Ramon Scheffer, Ugo Araújo Souza, Vivian Bamberg Corassini, Julsan Dos Santos, José Reck, João Ricardo Martins
Acaricide resistance is a major obstacle to the control of Rhipicephalus microplus. Historically, the indiscriminate use of chemical compounds has contributed to the selection of populations resistant to different classes of acaricides. Therefore, multiple acaricide resistance is an important threat to the chemical control of the cattle tick. To investigate the occurrence and extent of multiple resistance to acaricides in Southern Brazil we performed larval tests with cypermethrin, chlorpyriphos, amitraz, fipronil and ivermectin on 104 cattle tick field samples from different ranches in Rio Grande do Sul, between the years 2013 and 2015...
September 30, 2016: Ticks and Tick-borne Diseases
Benjamin Miranda Tabak, Tito Belchior Silva Moreira, Dimas Mateus Fazio, André Luiz Cordeiro Cavalcanti, George Henrrique de Moura Cunha
This paper examines the bank lending channel, which considers how monetary authority actions affect the variation of loans. We focus on the BRICS (Brazil, Russia, India, China and South Africa) totalizing 1254 banks from five countries in the period 2000-2012 (totalizing 13 years). The empirical results show that the effect of money supply growth on the growth of loans is non-linear and inverted U-shaped. In this context, our results show empirical evidence expansionary monetary policies do not increase the propensity of economic agents to systematically take greater risks on the market...
2016: PloS One
Larissa Brentano Capeletti, Mateus Borba Cardoso, João Henrique Zimnoch Dos Santos, Wei He
Thin films of silica prepared by a sol-gel process are becoming a feasible coating option for surface modification of implantable neural sensors without imposing adverse effects on the devices' electrical properties. In order to advance the application of such silica-based coatings in the context of neural interfacing, the characteristics of silica sol-gel are further tailored to gain active control of interactions between cells and the coating materials. By incorporating various readily available organotrialkoxysilanes carrying distinct organic functional groups during the sol-gel process, a library of hybrid organosilica coatings is developed and investigated...
October 7, 2016: ACS Applied Materials & Interfaces
Daniela Accorsi-Mendonça, Melina P da Silva, George M P R Souza, Ludmila Lima-Silveira, Marlusa Karlen-Amarante, Mateus R Amorim, Carlos E L Almado, Davi J A Moraes, Benedito H Machado
Despite several studies describing the electrophysiological properties of RVLM presympathetic neurons, there is no consensus in the literature about their pacemaking property, mainly due to different experimental approaches used for recordings of neuronal intrinsic properties. In this review we are presenting a historical retrospective about the pioneering studies and their controversies on the intrinsic electrophysiological property of auto-depolarization of these cells in conjunction with recent studies from our laboratory documenting that RVLM presympathetic neurons present pacemaking capacity...
2016: Frontiers in Physiology
Meritxell Valls-Mateus, Alexis Ortega, José Luis Blanch, Francesc Sabater, Manuel Bernal-Sprekelsen, Isabel Vilaseca
BACKGROUND AND OBJECTIVES: Previous studies showed good short-term Quality of life (QOL) after Transoral Laser Microsurgery (TLM) for laryngeal cancer. Here, we aimed to evaluate QOL after TLM in the long-term. METHODS: Prospective longitudinal study. Sixty-two consecutive disease-free patients were evaluated using UW-QOL v4 and SF-12 questionnaires, 1 and 5 years after TLM. Changes over time were assessed according to age, location, and tumor size. Long-term VHI-10 was also evaluated...
October 6, 2016: Journal of Surgical Oncology
Mateus Rossato, Rodolfo André Dellagrana, Rafael Martins da Costa, Ewertton de Souza Bezerra, João Otacílio Libardoni Dos Santos, Cassiano Ricardo Rech
BACKGROUND: The aim of this study was to verify the accuracy of anthropometric equations to estimate the body density (BD) of adults with Down syndrome (DS), and propose new regression equations. MATERIALS AND METHODS: Twenty-one males (30.5 ± 9.4 years) and 17 females (27.3 ± 7.7 years) with DS participated in this study. The reference method for BD was air displacement plethysmography (ADP). Also, the BD was estimated by anthropometric equations. The body fat percentage (BF %) was estimated by the Siri equation...
October 4, 2016: Journal of Applied Research in Intellectual Disabilities: JARID
Mateus Laguardia-Nascimento, Marcela R Gasparini, Érica B Sales, Anselmo V Rivetti, Natália M Sousa, Anapolino M Oliveira, Marcelo F Camargos, Tatiana F Pinheiro de Oliveira, Junia P M Gonçalves, Marieta C Madureira, Damaso P Ribeiro, Ivone V Marcondes, Edel F Barbosa-Stancioli, Antônio A Fonseca
Senecavirus A (SV-A) may cause vesicular disease and neonatal mortality in pigs, and was first detected in Brazil in 2015. Samples including tissues and serum from pigs with suspected vesicular diseases were collected from January to August in 2015 from farms in the states of Minas Gerais, Santa Catarina, Goiás and Rio Grande do Sul, Brazil, and tested for the presence of SV-A by reverse transcriptase PCR. All samples were negative for foot and mouth disease virus, as well as 13 other infectious agents associated with vesicular diseases in pigs...
October 2016: Veterinary Journal
Sara Santos, Nuno Mateus, Jaime Sampaio, Nuno Leite
The aim of this study was to examine the effect of an enrichment programme in motor, technical and tactical basketball skills, when accounting for the age of youth sport specialisation. Seventy-six college students (age: M = 20.4, SD = 1.9) were allocated according to three different paths: (i) non-structured (n = 14), (ii) early specialisation (n = 34), and (iii) late specialisation (n = 28), according to information previously provided by the participants about the quantity and type of sporting activities performed throughout their sporting careers...
September 29, 2016: Journal of Sports Sciences
Mateus C Adolfi, Amaury Herpin, Martina Regensburger, Jacopo Sacquegno, Joshua S Waxman, Manfred Schartl
In vertebrates, one of the first recognizable sex differences in embryos is the onset of meiosis, known to be regulated by retinoic acid (RA) in mammals. We investigated in medaka a possible meiotic function of RA during the embryonic sex determination (SD) period and in mature gonads. We found RA mediated transcriptional activation in germ cells of both sexes much earlier than the SD stage, however, no such activity during the critical stages of SD. In adults, expression of the RA metabolizing enzymes indicates sexually dimorphic RA levels...
September 28, 2016: Scientific Reports
C Greco, O Pares, N Pimentel, V Louro, J Stroom, S Viera, D Mateus, Z Fuks
No abstract text is available yet for this article.
October 1, 2016: International Journal of Radiation Oncology, Biology, Physics
Anália Lúcia Vieira Pacheco, Mateus Francisco Pagliarini, Gilberto Bernardo de Freitas, Ricardo Henrique Silva Santos, José Eduardo Serrão, José Cola Zanuncio
The use of organic foods has been increased in the world. Organic fertilizers, like cattle manure, have emerged as an important component of the organic system production. The production, mass, size, and mineral composition of passion fruit pulp were evaluated when treated with a mineral fertilizer (control) (MIN) or cattle manure at a single dose equivalent to potassium fertilizer (ORG) or double dose (2×ORG). The production and the numbers of fruits of plants treated with MIN and 2×ORG was higher than with ORG...
February 15, 2017: Food Chemistry
Matheus C Bandeca, Milton C Kuga, Ana Cs Diniz, Keren Cf Jordão-Basso, Mateus R Tonetto
The substances used in the root canal treatment, especially sodium hypochlorite solution and oxidant agents, can negatively interfere on the bond strength of the adhesive systems to dentin and on the dental crowns fracture resistance.(1,2).
2016: Journal of Contemporary Dental Practice
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