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https://www.readbyqxmd.com/read/28821999/developmental-neurotoxicity-of-the-hippocampus-following-in-utero-exposure-to-methylmercury-impairment-in-cell-signaling
#1
Luana Heimfarth, Jeferson Delgado, Moara Rodrigues Mignori, Daniel Pens Gelain, José Cláudio Fonseca Moreira, Regina Pessoa-Pureur
In this study, we assessed some hippocampal signaling cascades and behavioral impairments in 30-day-old rat pups prenatally exposed to methylmercury (MeHg). Pregnant rats were exposed to 1.0 or 2.0 mg/kg MeHg by gavage in alternated days from gestational day 5 until parturition. We found increased anxiety-like and decreased exploration behavior evaluated by open field test and deficit of both short- and long-term memories by novel object recognition task, respectively, in MeHg-treated pups. Downregulated PI3K/Akt/mTOR pathway and activated/hypophosphorylated (Ser9) GSK3β in MeHg-treated pups could be upstream of hyperphosphorylated Tau (Ser396) destabilizing microtubules and contributing to neural dysfunction in the hippocampus of these rats...
August 18, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28821831/targeted-inhibition-of-rage-in-substantia-nigra-of-rats-blocks-6-ohda-induced-dopaminergic-denervation
#2
Juciano Gasparotto, Camila Tiefensee Ribeiro, Rafael Calixto Bortolin, Nauana Somensi, Thallita Kelly Rabelo, Alice Kunzler, Natália Cabral Souza, Matheus Augusto de Bittencourt Pasquali, José Claudio Fonseca Moreira, Daniel Pens Gelain
The receptor for advanced glycation endproducts (RAGE) is a pattern-recognition receptor associated with inflammation in most cell types. RAGE up-regulates the expression of proinflammatory mediators and its own expression via activation of NF-kB. Recent works have proposed a role for RAGE in Parkinson's disease (PD). In this study, we used the multimodal blocker of RAGE FPS-ZM1, which has become available recently, to selectively inhibit RAGE in the substantia nigra (SN) of rats intracranially injected with 6-hydroxydopamine (6-OHDA)...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821005/anticonvulsant-effect-of-cannabidiol-in-the-pentylenetetrazole-model-pharmacological-mechanisms-electroencephalographic-profile-and-brain-cytokine-levels
#3
Luciano R Vilela, Isabel V Lima, Érica B Kunsch, Hyorrana Priscila P Pinto, Aline S de Miranda, Érica Leandro M Vieira, Antônio Carlos P de Oliveira, Marcio Flávio D Moraes, Antônio L Teixeira, Fabricio A Moreira
Cannabidiol (CBD), the main nonpsychotomimetic compound from Cannabis sativa, inhibits experimental seizures in animal models and alleviates certain types of intractable epilepsies in patients. Its pharmacological profile, however, is still uncertain. Here we tested the hypothesis that CBD anticonvulsant mechanisms are prevented by cannabinoid (CB1 and CB2) and vanilloid (TRPV1) receptor blockers. We also investigated its effects on electroencephalographic (EEG) activity and hippocampal cytokines in the pentylenetetrazole (PTZ) model...
August 15, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28819196/specialized-odorant-receptors-in-social-insects-that-detect-cuticular-hydrocarbon-cues-and-candidate-pheromones
#4
Gregory M Pask, Jesse D Slone, Jocelyn G Millar, Prithwiraj Das, Jardel A Moreira, Xiaofan Zhou, Jan Bello, Shelley L Berger, Roberto Bonasio, Claude Desplan, Danny Reinberg, Jürgen Liebig, Laurence J Zwiebel, Anandasankar Ray
Eusocial insects use cuticular hydrocarbons as components of pheromones that mediate social behaviours, such as caste and nestmate recognition, and regulation of reproduction. In ants such as Harpegnathos saltator, the queen produces a pheromone which suppresses the development of workers' ovaries and if she is removed, workers can transition to a reproductive state known as gamergate. Here we functionally characterize a subfamily of odorant receptors (Ors) with a nine-exon gene structure that have undergone a massive expansion in ants and other eusocial insects...
August 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28817193/response-reinforcer-dependency-and-resistance-to-change
#5
Carlos R X Cançado, Josele Abreu-Rodrigues, Raquel Moreira Aló, Flávia Hauck, Adam H Doughty
The effects of the response-reinforcer dependency on resistance to change were studied in three experiments with rats. In Experiment 1, lever pressing produced reinforcers at similar rates after variable interreinforcer intervals in each component of a two-component multiple schedule. Across conditions, in the fixed component, all reinforcers were response-dependent; in the alternative component, the percentage of response-dependent reinforcers was 100, 50 (i.e., 50% response-dependent and 50% response-independent) or 10% (i...
August 17, 2017: Journal of the Experimental Analysis of Behavior
https://www.readbyqxmd.com/read/28816503/pubertal-development-of-body-size-and-soccer-specific-functional-capacities-in-adolescent-players
#6
Humberto Moreira Carvalho, José A Lekue, Susana M Gil, Iraia Bidaurrazaga-Letona
Pubertal growth in body size and functional capacities were examined in adolescent soccer players (n = 33). The average age at baseline was 10.9 (9.8-11.8 years). Peak height velocity (PHV) and growth curves for body mass and functional performance (countermovement jump, 15-m sprint, agility and Yo-Yo intermittent recovery test - level 1) were determined with Bayesian multilevel models. Estimates for PHV and age at PHV were 8.1 cm/year (95% credible interval: 4.2-18.5 cm/year) and 12.9 years (95% credible interval: 11...
August 17, 2017: Research in Sports Medicine
https://www.readbyqxmd.com/read/28816404/multivalency-increases-the-binding-strength-of-rgd-peptidomimetic-paclitaxel-conjugates-to-integrin-%C3%AE-v%C3%AE-3
#7
Cesare Gennari, André Raposo Moreira Dias, Arianna Pina, Alberto Dal Corso, Daniela Arosio, Laura Belvisi, Luca Pignataro, Michele Caruso
Herein we report the synthesis of three multimeric RGD peptidomimetic-paclitaxel conjugates featuring a number of αVβ3 integrin ligands ranging from 2 to 4 (compounds 7-9). These constructs were assembled by conjugation of the integrin αVβ3 ligand cyclo[DKP-RGD]-CH2NH2 (2) with paclitaxel (3) via a 2'-carbamate with a self-immolative spacer, the lysosomally cleavable Val-Ala dipeptide linker, a multimeric scaffold, a triazole linkage, and finally a PEG spacer. Two monomeric conjugates (compounds 5-6) were also synthesized as reference compounds...
August 17, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28814957/induced-pluripotent-stem-cell-for-the-study-and-treatment-of-sickle-cell-anemia
#8
Luiza Cunha Junqueira Reis, Virgínia Picanço-Castro, Bárbara Cristina Martins Fernandes Paes, Olívia Ambrozini Pereira, Isabela Gerdes Gyuricza, Fabiano Tófoli de Araújo, Mariana Morato-Marques, Lílian Figueiredo Moreira, Everton de Brito Oliveira Costa, Tálita Pollyanna Moreira Dos Santos, Dimas Tadeu Covas, Lygia da Veiga Pereira Carramaschi, Elisa Maria de Sousa Russo
Sickle cell anemia (SCA) is a monogenic disease of high mortality, affecting millions of people worldwide. There is no broad, effective, and safe definitive treatment for SCA, so the palliative treatments are the most used. The establishment of an in vitro model allows better understanding of how the disease occurs, besides allowing the development of more effective tests and treatments. In this context, iPSC technology is a powerful tool for basic research and disease modeling, and a promise for finding and screening more effective and safe drugs, besides the possibility of use in regenerative medicine...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28814363/fluoride-availability-and-stability-in-children-s-toothpastes-in-uruguay
#9
Licet Alvarez Loureiro, Anunzziatta Fabruccini Fager, Maurício José Santos Moreira, Marisa Maltz, Lina Naomi Hashizume
PURPOSE: The purpose of this study was to evaluate the availability and stability of fluoride in children's toothpastes in Uruguay. METHODS: Six commercial brands of children's toothpaste available in Uruguay were tested. Analyses were made when the dentifrices were purchased (fresh samples) and after one year of storage (aged samples). Total fluoride (TF) and total soluble fluoride (TSF) concentrations were determined using an ion specific electrode. RESULTS: Four of the children's dentifrices showed TF concentration similar to that specified on the package...
May 15, 2017: Journal of Dentistry for Children
https://www.readbyqxmd.com/read/28813083/ankle-brachial-index-and-diabetic-neuropathy-study-of-225-patients
#10
Liliana Chevtchouk, Marcio Heitor Stelmo da Silva, Osvaldo José Moreira do Nascimento
Objective: To evaluate neuropathic pain and peripheral vascular disease in diabetics and compare this with the length of time since diagnosis in type 1, and type 2 diabetes. Methods: A cross-sectional study with 225 diabetics chosen from their responses on the DN4 questionnaire, who were then evaluated with the ankle-brachial index (ABI), separating type 1 diabetes from type 2 diabetes. Results: A higher incidence of neuropathic pain in those over 60 years of age showed an ABI > 1...
August 2017: Arquivos de Neuro-psiquiatria
https://www.readbyqxmd.com/read/28813078/quality-of-life-in-parkinson-s-disease-patients-progression-markers-of-mild-to-moderate-stages
#11
Raissa Carla Moreira, Marise Bueno Zonta, Ana Paula Serra de Araújo, Vera Lúcia Israel, Hélio A G Teive
Objective: To investigate which factors are associated with the quality of life decline in Parkinson's disease patients from mild to moderate stages. Methods: The Unified Parkinson's Disease Rating Scale and Parkinson's Disease Questionnaire-39 were used to evaluate clinical/functional data and the quality of life. Results: The markers of clinical/functional worsening were drooling (p < 0.004), need for assistance with hygiene (p = 0.02), greater freezing frequency (p = 0...
August 2017: Arquivos de Neuro-psiquiatria
https://www.readbyqxmd.com/read/28813070/neonatal-hearing-screening-in-primary-health-care-and-family-health-care
#12
José Carlos Sabbag, Adriana Bender Moreira de Lacerda
Purpose: The Universal Newborn Hearing Screening (UNHS) looks for early diagnosis and rehabilitation of newborns at risk or not of hearing impairment. The purpose is analyze the flow of Universal Newborn Hearing Screening in the family health care strategy unit through the tracking and monitoring of children. Methods: This is a quantitative and retrospective study. The trace begins with the third copy of the Live Newborn Declaration, filled in at the maternity ward...
August 10, 2017: CoDAS
https://www.readbyqxmd.com/read/28812729/complex-modular-architecture-around-a-simple-toolkit-of-wing-pattern-genes
#13
Steven M Van Belleghem, Pasi Rastas, Alexie Papanicolaou, Simon H Martin, Carlos F Arias, Megan A Supple, Joseph J Hanly, James Mallet, James J Lewis, Heather M Hines, Mayte Ruiz, Camilo Salazar, Mauricio Linares, Gilson R P Moreira, Chris D Jiggins, Brian A Counterman, W Owen McMillan, Riccardo Papa
Identifying the genomic changes that control morphological variation and understanding how they generate diversity is a major goal of evolutionary biology. In Heliconius butterflies, a small number of genes control the development of diverse wing colour patterns. Here, we used full-genome sequencing of individuals across the Heliconius erato radiation and closely related species to characterize genomic variation associated with wing pattern diversity. We show that variation around colour pattern genes is highly modular, with narrow genomic intervals associated with specific differences in colour and pattern...
January 30, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812192/safety-of-vaccination-against-brucellosis-with-the-rough-strain-in-pregnant-cattle
#14
Adriana Agostini Barbosa, Ana Cristina Silva Figueiredo, Miller Pereira Palhao, Joao Henrique Moreira Viana, Carlos Antonio Carvalho Fernandes
Brucellosis is an infectious and contagious disease that profoundly impacts public health. However, in many countries, disease prevention is restricted to the vaccination of calves, and there is no prophylactic strategy for pregnant heifers and cows. The aim of this study was to evaluate the safety of the rough strain vaccine against brucellosis in pregnant cattle. Crossbred cows (N = 96) at three gestational periods (early, mid, or late pregnancy) were randomly allocated into the vaccine treatment group or to the control group...
August 15, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28811818/prototype-generation-using-self-organizing-maps-for-informativeness-based-classifier
#15
Leandro Juvêncio Moreira, Leandro A Silva
The k nearest neighbor is one of the most important and simple procedures for data classification task. The kNN, as it is called, requires only two parameters: the number of k and a similarity measure. However, the algorithm has some weaknesses that make it impossible to be used in real problems. Since the algorithm has no model, an exhaustive comparison of the object in classification analysis and all training dataset is necessary. Another weakness is the optimal choice of k parameter when the object analyzed is in an overlap region...
2017: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28810516/lectin-from-inflorescences-of-ornamental-crop-alpinia-purpurata-acts-on-immune-cells-to-promote-th1-and-th17-responses-nitric-oxide-release-and-lymphocyte-activation
#16
Jéssica de Santana Brito, Gustavo Ramos Salles Ferreira, Emeline Klimczak, Liliya Gryshuk, Nataly Diniz de Lima Santos, Leydianne Leite de Siqueira Patriota, Leyllane Rafael Moreira, Ana Karine Araújo Soares, Bruno Rafael Barboza, Patrícia Maria Guedes Paiva, Daniela Maria do Amaral Ferraz Navarro, Virgínia Maria Barros de Lorena, Cristiane Moutinho Lagos de Melo, Marília Cavalcanti Coriolano, Thiago Henrique Napoleão
Alpinia purpurata is an ornamental crop known as a source of bioactive molecules. This is the first study to report isolation of a lectin (carbohydrate-binding protein) from A. purpurata inflorescences (ApuL). The immunomodulatory potential of ApuL was evaluated by investigating its effects on the production of cytokines and release of nitric oxide by human peripheral blood mononuclear cells (PBMCs). In addition, the differentiation and activation of lymphocytes treated with ApuL was evaluated by immunophenotyping assays...
August 10, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28808659/functional-profile-evaluation-of-lactobacillus-fermentum-tcuesc01-a-new-potential-probiotic-strain-isolated-during-cocoa-fermentation
#17
Tauá Alves Melo, Thalis Ferreira Dos Santos, Lennon Ramos Pereira, Hélic Moreira Passos, Rachel Passos Rezende, Carla Cristina Romano
The use of intestinal probiotic bacteria is very common in the food industry and has been the focus of the majority of research in this field. Yet in recent years, research on extraintestinal microorganisms has greatly increased due to their well-known potential as probiotics. Thus, we studied a strain of Lactobacillus fermentum (TCUESC01) extracted from fermenting cocoa. First, we examined the impact of pH on the growth of this strain and studied its survival under conditions similar to those of the human gastrointestinal tract...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28808256/spoton-high-accuracy-identification-of-protein-protein-interface-hot-spots
#18
Irina S Moreira, Panagiotis I Koukos, Rita Melo, Jose G Almeida, Antonio J Preto, Joerg Schaarschmidt, Mikael Trellet, Zeynep H Gümüş, Joaquim Costa, Alexandre M J J Bonvin
We present SpotOn, a web server to identify and classify interfacial residues as Hot-Spots (HS) and Null-Spots (NS). SpotON implements a robust algorithm with a demonstrated accuracy of 0.95 and sensitivity of 0.98 on an independent test set. The predictor was developed using an ensemble machine learning approach with up-sampling of the minor class. It was trained on 53 complexes using various features, based on both protein 3D structure and sequence. The SpotOn web interface is freely available at: http://milou...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28807772/streptococcus-agalactiae-impairs-cerebral-bioenergetics-in-experimentally-infected-silver-catfish
#19
Matheus D Baldissera, Carine F Souza, Belisa S Parmeggiani, Roberto C V Santos, Guilhian Leipnitz, Karen L S Moreira, Maria Izabel U M da Rocha, Marcelo L da Veiga, Bernardo Baldisserotto
It is becoming evident that bacterial infectious diseases affect brain energy metabolism, where alterations of enzymatic complexes of the mitochondrial respiratory chain and creatine kinase (CK) lead to an impairment of cerebral bioenergetics which contribute to disease pathogenesis in the central nervous system (CNS). Based on this evidence, the aim of this study was to evaluate whether alterations in the activity of complex IV of the respiratory chain and CK contribute to impairment of cerebral bioenergetics during Streptococcus agalactiae infection in silver catfish (Rhamdia quelen)...
August 11, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28807426/clinical-usefulness-of-catheter-drawn-blood-samples-and-catheter-tip-cultures-for-the-diagnosis-of-catheter-related-bloodstream-infections-in-neonatology-a-systematic-review
#20
REVIEW
Janita Ferreira, Paulo Augusto Moreira Camargos, Wanessa Trindade Clemente, Roberta Maia de Castro Romanelli
OBJECTIVES: Neonatal sepsis is the most frequent health care-associated infection in neonatal units. This study aimed to analyze articles on the clinical usefulness of catheter-drawn blood samples and catheter tip cultures for the diagnosis of intravascular catheter-related bloodstream infection (CRBSI) in neonates. METHODS: A systematic search was performed for studies published from 1987-2017, without language restriction. Observational studies carried out in neonates with CRBSI diagnosed using catheter-drawn blood samples or catheter tip cultures were included...
August 11, 2017: American Journal of Infection Control
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