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Estela Fernandes E Silva, Felipe da Silva Figueira, Aline Portantiolo Lettnin, Michele Carrett-Dias, Daza de Moraes Vaz Batista Filgueira, Susana Kalil, Gilma Santos Trindade, Ana Paula de Souza Votto
C-Phycocyanin (C-PC) has been shown to be promising in cancer treatment; however, although several articles detailing this have been published, its main mechanisms of action and its cellular targets have not yet been defined, nor has a detailed exploration been conducted of its role in the resistance of cancer cells to chemotherapy, rendering clinical use impossible. From our extensive examination of the literature, we have determined as our main hypothesis that C-PC has no one specific target, but rather acts on the membrane, cytoplasm, and nucleus with diverse mechanisms of action...
July 26, 2017: Pharmacological Reports: PR
Jimena Leyria, Leonardo L Fruttero, Rodrigo Ligabue-Braun, Marina S Defferrari, Estela L Arrese, José L Soulages, Beatriz P Settembrini, Celia R Carlini, Lilián E Canavoso
DmCatD, a cathepsin D-like peptidase of the hematophagous insect Dipetalogaster maxima, is synthesized by the fat body and the ovary and functions as yolk protein precursor. Functionally, DmCatD is involved in vitellin proteolysis. In this work, we purified and sequenced DmCatD, performed bioinformatic analyses and investigated the events involved in its targeting and storage in developing oocytes. By ion exchange and gel filtration chromatography, DmCatD was purified from egg homogenates and its identity was confirmed by mass spectrometry...
January 8, 2018: Journal of Insect Physiology
Anny Giselly Milhome da Costa Farre, Patrícia Neyva da Costa Pinheiro, Neiva Francenely Cunha Vieira, Fabiane do Amaral Gubert, Maria Dalva Dos Santos Alves, Estela Maria Leite Meirelles Monteiro
OBJECTIVE: To evaluate the contribution of arts education to health promotion of adolescents in situations of urban social vulnerability. METHOD: Participatory evaluative research, with a qualitative approach, using as a reference the theoretical constructs of Paulo Freire's Conscientization and the Empowerment Evaluation as a method of collecting with adolescents and teachers of an arts education program in the field of the Family Health Strategy. RESULTS: Participants constructed a collective mission that represented the concept of adolescent health promotion...
January 2018: Revista Brasileira de Enfermagem
Estela Jiménez-López, Eva María Sánchez-Morla, Ana Isabel Aparicio, Ana López-Villarreal, Vicente Martínez-Vizcaíno, Roberto Rodriguez-Jimenez, Eduard Vieta, José Luis Santos
BACKGROUND: More than 50% of individuals with bipolar disorder (BD) do not reach full psychosocial functioning, even during periods of euthymia. It has been suggested that history of psychotic symptoms is one of the factors which are associated with a worse functional outcome. The objective was to compare psychosocial functioning between patients with BD, with (BD-P), and without (BD-NP) a history of psychotic symptoms, and to examine whether the history of psychotic symptoms, or other clinical or neurocognitive variables predict psychosocial functioning...
January 2, 2018: Journal of Affective Disorders
Ciro Invernizzi, Enrique Nogueira, Pablo Juri, Estela Santos, Daniela Arredondo, Belén Branchiccela, Yamandú Mendoza, Karina Antúnez
For more than 60 years, sporadic cases of massive summer honey bee larvae mortality in colonies located near freshwater systems with abundant riparian vegetation have been reported in Uruguay. This odd phenomenon, known as "River disease" by beekeepers, can lead to colony death by depopulation. The aim of this study was to detect the causes of larvae death. Different experiments and analyses were performed using affected apiaries located between two important water courses. 1 day old larvae were the most susceptible and substances that killed the larvae were present in the nectar but not in the pollen...
2018: PloS One
Laddawan Sangsawang, Beatriz Estela Casareto, Hideo Ohba, Hung Manh Vu, Aussanee Meekaew, Toshiyuki Suzuki, Thamasak Yeemin, Yoshimi Suzuki
Corals evolved by establishing symbiotic relationships with various microorganisms (the zooxanthellae, filamentous algae, cyanobacteria, bacteria, archaea, fungi and viruses), forming the 'coral holobiont'. Among them, the endolithic community is the least studied. Its main function was considered to be translocation of photo-assimilates to the coral host, particularly during bleaching. Here, we hypothesize that (i) endolithic algae may show similar primary production rates in healthy or bleached corals by changing their pigment ratios, and therefore that similar production and translocation of organic matter may occur at both conditions and (ii) diazotrophs are components of the endolithic community; therefore, N2 fixation and translocation of organic nitrogen may occur...
December 2017: Royal Society Open Science
María de Las Mercedes Guerisoli, Estela Luengos Vidal, Marcello Franchini, Nicolás Caruso, Emma Beatriz Casanave, Mauro Lucherini
Livestock predation is one of the major causes of conflicts between humans and pumas (Puma concolor). Using data from interviews with ranchers and kill-site inspections, we characterized puma-livestock conflicts in Villarino and Patagones counties of central Argentinean rangelands. Depredation was considered the major cause of livestock losses, and puma attacks were reported in 46.6% and 35.4% of ranches in Villarino and Patagones, respectively. The majority of ranches underwent losses smaller than 1000 USD...
December 2017: Royal Society Open Science
Maria Estela Martinez-Escala, Alba L Posligua, Heather Wickless, Audrey Rutherford, Kimberly A Sable, Belen Rubio-Gonzalez, Xiaolong A Zhou, Jason B Kaplan, Barbara Pro, Jaehyuk Choi, Christiane Querfeld, Steven T Rosen, Joan Guitart
BACKGROUND: Cutaneous lymphoma (CL) diagnosed after anti-tumor necrosis factor (TNF)α therapy has been reported in the literature, yet a clear link between both events remains elusive. OBJECTIVE: To review our experience with CL diagnosed during or after the use of anti-TNFα therapies. METHODS: This is a multicenter retrospective study and a literature review. RESULTS: Twenty-two cases, including 20 cutaneous T-cell lymphomas (CTCL) and 2 cutaneous B-cell lymphomas (CBCL), were identified...
January 4, 2018: Journal of the American Academy of Dermatology
Noèlia Carbó, Javier López Carrero, F Javier Garcia-Castillo, Isabel Tormos, Estela Olivas, Elisa Folch, Miguel Alcañiz Fillol, Juan Soto, Ramón Martínez-Máñez, M Carmen Martínez-Bisbal
The use of a voltammetric electronic tongue for the quantitative analysis of quality parameters in spring water is proposed here. The electronic voltammetric tongue consisted of a set of four noble electrodes (iridium, rhodium, platinum, and gold) housed inside a stainless steel cylinder. These noble metals have a high durability and are not demanding for maintenance, features required for the development of future automated equipment. A pulse voltammetry study was conducted in 83 spring water samples to determine concentrations of nitrate (range: 6...
December 25, 2017: Sensors
Estela de O Lima, Tatiane M Guerreiro, Carlos Fernando O R Melo, Diogo N de Oliveira, Daisy Machado, Marcelo Lancelloti, Rodrigo R Catharino
Recently, microcephaly cases have increased in Americas and have been matter of concern due to Zika virus (ZIKV) recent outbreak. Previous studies have shown that ZIKV-infected progenitor neuronal cells present morphological abnormalities and increased rates of cell death, which may be indicators of microcephaly causes. As recent studies indicate Zika virus' tropism for brain cells, how would a glioblastoma (GBM) lineage behave under ZIKV infection, considering GBM the most common and malignant brain tumor in adults, presenting extreme chemoresistance and high morbidity and mortality rates? The current trend of using genetically engineered oncolytic pathogens as a safe way to eliminate tumors is under development, with trials already in course...
December 28, 2017: Journal of Mass Spectrometry: JMS
Estela Maldonado, Yamila López-Gordillo, Teresa Partearroyo, Gregorio Varela-Moreiras, Concepción Martínez-Álvarez, Juliana Pérez-Miguelsanz
It is widely accepted that maternal folic acid (FA) deficiency during pregnancy is a risk factor for abnormal development. The tongue, with multiple genes working together in a coordinated cascade in time and place, has emerged as a target organ for testing the effect of FA during development. A FA-deficient (FAD) diet was administered to eight-week-old C57/BL/6J mouse females for 2-16 weeks. Pregnant dams were sacrificed at gestational day 17 (E17). The tongues and heads of 15 control and 210 experimental fetuses were studied...
December 28, 2017: Nutrients
Rinaldo Florencio-Silva, Gisela R S Sasso, Estela Sasso-Cerri, Manuel J Simões, Paulo S Cerri
Estrogen maintains osteocyte viability, whereas its deficiency induces osteocyte apoptosis. As autophagy is important for osteocyte viability, we hypothesized whether the anti-apoptotic effect of estrogen is related to autophagy in osteocytes. Thirty adult female rats were sham-operated (SHAM) or ovariectomized (OVX). After three weeks, twelve rats of SHAM and OVX groups were killed before treatment (basal period), whereas the remaining rats received estrogen (OVXE) or vehicle (OVX) for 45 days. Fragments of maxilla containing alveolar process of the first molars were embedded in paraffin or Araldite...
December 22, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Werner Leber, Lee Beresford, Claire Nightingale, Estela Capelas Barbosa, Stephen Morris, Farah El-Shogri, Heather McMullen, Kambiz Boomla, Valerie Delpech, Alison Brown, Jane Hutchinson, Vanessa Apea, Merle Symonds, Samantha Gilliham, Sarah Creighton, Maryam Shahmanesh, Naomi Fulop, Claudia Estcourt, Jane Anderson, Jose Figueroa, Chris Griffiths
INTRODUCTION: HIV remains underdiagnosed. Guidelines recommend routine HIV testing in primary care, but evidence on implementing testing is lacking. In a previous study, the Rapid HIV Assessment 2 (RHIVA2) cluster randomised controlled trial, we showed that providing training and rapid point-of-care HIV testing at general practice registration (RHIVA2 intervention) in Hackney led to cost-effective, increased and earlier diagnosis of HIV. However, interventions effective in a trial context may be less so when implemented in routine practice...
December 14, 2017: BMJ Open
Francisca Cornejo, Marianne Vruwink, Claudia Metz, Paola Muñoz, Nicole Salgado, Joaquín Poblete, María Estela Andrés, Jaime Eugenín, Rommy von Bernhardi
Late onset Alzheimer disease's (LOAD) main risk factor is aging. Although it is not well known which age-related factors are involved in its development, evidence points out to the involvement of an impaired amyloid-β (Aβ) clearance in the aged brain among possible causes. Glial cells are the main scavengers of the brain, where Scavenger Receptor class A (SR-A) emerges as a relevant player in AD because of its participation in Aβ uptake and in the modulation of glial cell inflammatory response. Here, we show that SR-A expression is reduced in the hippocampus of aged animals and APP/PS1 mice...
December 12, 2017: Brain, Behavior, and Immunity
Juliana Alcarás Saraiva, Tiago Silva da Fonseca, Guilherme Ferreira Silva, Estela Sasso-Cerri, Juliane Maria Guerreiro-Tanomaru, Mario Tanomaru-Filho, Paulo Sérgio Cerri
Considering that endodontic sealers release some components which may promote delay in the repair process, our purpose was to evaluate the tissue reaction promoted by MTA Plus and MTA Fillapex in comparison with AH Plus (standard control) and Endofill, which has a long clinical track record. One hundred rats were distributed into five groups: MTA Plus (Avalon Biom Inc., Bradenton, FL, USA), MTA Fillapex (Angelus, Londrina, PR, Brazil), AH Plus (Dentsply DeTrey GmbH, Konstanz, Germany), Endofill (Dentsply, Petrópolis, RJ, Brazil) and CG (control group, empty polyethylene tubes)...
December 15, 2017: Biomedical Materials
Estela Baquedano, Lorena Torné, Pablo Caño, Pablo A Postigo
We investigated the fabrication of large-area (cm²) nanostructured glasses for solar cell modules with hydrophobic and hydrophilic properties using soft lithography and colloidal lithography. Both of these techniques entail low-cost and ease of nanofabrication. We explored the use of simple 1D and 2D nanopatterns (nanowires and nanocones) and the effect of introducing disorder in the nanostructures. We observed an increase in the transmitted light for ordered nanostructures with a maximum value of 99% for wavelengths >600 nm when ordered nanocones are fabricated on the two sides of the solar glass...
December 14, 2017: Nanomaterials
María Lorena Roldán, Juan Manuel Teijeiro, Jimena Ruiz Álvarez, Patricia Estela Marini
The oviduct is an organ in which a subpopulation of sperm is stored in a reservoir, preserving its fertilizing potential. In porcine, two oviductal proteins have been identified in relation to sperm binding, Annexin A2 and Deleted in Malignant Brain Tumour 1 (DMBT1). DMBT1 is a multifunctional, multidomain glycoprotein and the characteristics of all of its domains, as well as its carbohydrates, make them candidates for sperm binding. In this work, we challenge sperm for binding to pig oviductal cells on primary culture, after treatment with antibodies specific for the different domains present in DMBT1...
December 14, 2017: Journal of Cellular Biochemistry
Estela R Queiroz, Celeste M P DE Abreu, Denise A Rocha, Raimundo V DE Sousa, Rodrigo M Fráguas, Mariana A Braga, Pedro H S César
Dyslipidemias are associated with the incidence of cardiovascular diseases, obesity, diabetes, hypertension and hepatic steatosis, being the cause of morbidity and mortality. This study investigated the effects of lychee peel flour (PF) on serum levels of total cholesterol (TC), low-density lipoprotein (LDL-c), triacylglycerols (TAG) and various parameters related to obesity, in rats fed a hypercholesterolemic diet. Therefore, 20 male rats were used. In the first 21 days, the animals were fed a hypercholesterolemic diet, except for control group...
December 11, 2017: Anais da Academia Brasileira de Ciências
Soledad Ferreras, Guillermo Fernández, Víctor Danelon, María V Pisano, Luján Masseroni, Christopher A Chapleau, Favio A Krapacher, Estela C Mlewski, Daniel H Mascó, Carlos Arias, Lucas Pozzo-Miller, María G Paglini
Psychostimulant drugs of abuse increase dendritic spine density in reward centers of the brain. However, little is known about their effects in the hippocampus, where activity-dependent changes in the density of dendritic spine are associated with learning and memory. Recent reports suggest that Cdk5 plays an important role in drug addiction, but its role in psychostimulant's effects on dendritic spines in hippocampus remain unknown. We used in vivo and in vitro approaches to demonstrate that amphetamine increases dendritic spine density in pyramidal neurons of the hippocampus...
2017: Frontiers in Cellular Neuroscience
Kim D Falkenberg, Nancy E Braverman, Ann B Moser, Steven J Steinberg, Femke C C Klouwer, Agatha Schlüter, Montserrat Ruiz, Aurora Pujol, Martin Engvall, Karin Naess, FrancJan van Spronsen, Irene Körver-Keularts, M Estela Rubio-Gozalbo, Sacha Ferdinandusse, Ronald J A Wanders, Hans R Waterham
Zellweger spectrum disorders (ZSDs) are autosomal-recessive disorders that are caused by defects in peroxisome biogenesis due to bi-allelic mutations in any of 13 different PEX genes. Here, we identified seven unrelated individuals affected with an apparent dominant ZSD in whom a heterozygous mutant PEX6 allele (c.2578C>T [p.Arg860Trp]) was overrepresented due to allelic expression imbalance (AEI). We demonstrated that AEI of PEX6 is a common phenomenon and is correlated with heterozygosity for a frequent variant in the 3' untranslated region (UTR) of the mutant allele, which disrupts the most distal of two polyadenylation sites...
December 7, 2017: American Journal of Human Genetics
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