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https://www.readbyqxmd.com/read/28655165/investigation-of-natural-radioactivity-as-a-possible-driver-of-cancer-incidence-in-para%C3%A3-ba-northeastern-brazil
#1
Josineide Marques do Nascimento Santos, José Araújo Dos Santos Júnior, Ana Maria Mendoça de Albuquerque Melo, Romilton Dos Santos Amaral, Rômulo Simões Cezar Menezes, Zahily Herrero Fernández, Lino Angel Valcárcel Rojas, Jairo Dias Bezerra, Alberto Antônio da Silva, Kennedy Francys Rodrigues Damascena, Nilson Vicente da Silva Medeiros
An increase of health problems has been reported in the city of Triunfo, Paraíba, NE Brazil. This pattern has been attributed to environmental radiation since there are uranium deposits in the neighboring municipalities. The present study aimed to carry a radiometric survey in Triunfo to determine effective dose from external outdoor radiation exposure. The results were obtained through 'in situ' measurements using a gamma spectrometry system. The results ranged from 0.06 to 0.38 mSv/y, mean of 0.20 mSv/y...
June 24, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28654840/an-emotional-stroop-task-with-faces-and-words-a-comparison-of-young-and-older-adults
#2
Ana I Agustí, Encarnación Satorres, Alfonso Pitarque, Juan C Meléndez
ANTECEDENTS: Given the contradictions of previous studies on the changes in attentional responses produced in aging a Stroop emotional task was proposed to compare young and older adults to words or faces with an emotional valence. METHOD: The words happy or sad were superimposed on faces that express the emotion of happiness or sadness. The emotion expressed by the word and the face could agree or not (cued and uncued trials, respectively). 85 young and 66 healthy older adults had to identify both faces and words separately, and the interference between the two types of stimuli was examined...
June 24, 2017: Consciousness and Cognition
https://www.readbyqxmd.com/read/28654819/the-expression-of-connexins-and-sox2-reflects-the-plasticity-of-glioma-stem-like-cells
#3
Joana Balça-Silva, Diana Matias, Luiz Gustavo Dubois, Brenno Carneiro, Anália do Carmo, Henrique Girão, Fernanda Ferreira, Valeria Pereira Ferrer, Leila Chimelli, Paulo Niemeyer Filho, Hermínio Tão, Olinda Rebelo, Marcos Barbosa, Ana Bela Sarmento-Ribeiro, Maria Celeste Lopes, Vivaldo Moura-Neto
Glioblastoma (GBM) is the most malignant primary brain tumor, with an average survival rate of 15 months. GBM is highly refractory to therapy, and such unresponsiveness is due, primarily, but not exclusively, to the glioma stem-like cells (GSCs). This subpopulation express stem-like cell markers and is responsible for the heterogeneity of GBM, generating multiple differentiated cell phenotypes. However, how GBMs maintain the balance between stem and non-stem populations is still poorly understood. We investigated the GBM ability to interconvert between stem and non-stem states through the evaluation of the expression of specific stem cell markers as well as cell communication proteins...
June 24, 2017: Translational Oncology
https://www.readbyqxmd.com/read/28654774/fkbp5-moderation-of-the-relationship-between-childhood-trauma-and-maladaptive-emotion-regulation-strategies-in-adolescents
#4
Thorhildur Halldorsdottir, Ana Paula Soares de Matos, Yvonne Awaloff, Eiríkur Örn Arnarson, W Edward Craighead, Elisabeth B Binder
Maladaptive emotion regulation strategies, such as rumination and catastrophizing, are transdiagnostic risk factors for psychopathology. FK506-binding protein 51 (FKBP5) has been found to moderate the relationship between stressful life events and various psychiatric disorders. Given the cross-disorder moderation effect of FKBP5 at the diagnostic level, the aim of the current study was to examine whether the relationship between exposure to childhood trauma and transdiagnostic maladaptive emotion regulation processes would also be moderated by genetic FKBP5 variation in a community sample of adolescents...
June 17, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28654773/increased-anxiety-and-fear-memory-in-adult-mice-lacking-type-2-deiodinase
#5
Soledad Bárez-López, Ana Montero-Pedrazuela, Daniel Bosch-García, César Venero, Ana Guadaño-Ferraz
A euthyroid state in the brain is crucial for its adequate development and function. Impairments in thyroid hormones (THs; T3 or 3,5,3'-triiodothyronine and T4 or thyroxine) levels and availability in brain can lead to neurological alterations and to psychiatric disorders, particularly mood disorders. The thyroid gland synthetizes mainly T4, which is secreted to circulating blood, however, most actions of THs are mediated by T3, the transcriptionally active form. In the brain, intracellular concentrations of T3 are modulated by the activity of type 2 (D2) and type 3 (D3) deiodinases...
June 16, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28654752/in-silico-prediction-of-the-toxic-potential-of-lupeol
#6
Manuel Antonio Ruiz-Rodríguez, Angelo Vedani, Ana Lidia Flores-Mireles, Manuel Humberto Chairez-Ramirez, Jose Alberto Gallegos-Infante, Ruben F Gonzalez-Laredo
Lupeol is a natural triterpenoid found in many plant species such as mango. This compound is the principal active component of many traditional herbal medicines. In the past decade, a considerable number of publications dealt with lupeol and its analogues due to the interest in their pharmacological activities against cancer, inflammation, arthritis, diabetes, and heart disease. To identify further potential applications of lupeol and its analogues, it is necessary to investigate their mechanisms of action, particularly, their interaction with off-target proteins that may trigger adverse effects or toxicity...
June 27, 2017: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/28654688/modelled-health-benefits-of-a-sugar-sweetened-beverage-tax-across-different-socioeconomic-groups-in-australia-a-cost-effectiveness-and-equity-analysis
#7
Anita Lal, Ana Maria Mantilla-Herrera, Lennert Veerman, Kathryn Backholer, Gary Sacks, Marjory Moodie, Mohammad Siahpush, Rob Carter, Anna Peeters
BACKGROUND: A sugar-sweetened beverage (SSB) tax in Mexico has been effective in reducing consumption of SSBs, with larger decreases for low-income households. The health and financial effects across socioeconomic groups are important considerations for policy-makers. From a societal perspective, we assessed the potential cost-effectiveness, health gains, and financial impacts by socioeconomic position (SEP) of a 20% SSB tax for Australia. METHODS AND FINDINGS: Australia-specific price elasticities were used to predict decreases in SSB consumption for each Socio-Economic Indexes for Areas (SEIFA) quintile...
June 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28654127/bio-camouflage-of-anatase-nanoparticles-explored-by-in-situ-high-resolution-electron-microscopy
#8
Ana R Ribeiro, Arijita Mukherjee, Xuan Hu, Shayan Shafien, Reza Ghodsi, Kun He, Sara Gemini-Piperni, Canhui Wang, Robert F Klie, Tolou Shokuhfar, Reza Shahbazian-Yassar, Radovan Borojevic, Luis A Rocha, José M Granjeiro
While titanium is the metal of choice for most prosthetics and inner body devices due to its superior biocompatibility, the discovery of Ti-containing species in the adjacent tissue as a result of wear and corrosion has been associated with autoimmune diseases and premature implant failures. Here, we utilize the in situ liquid cell transmission electron microscopy (TEM) in a liquid flow holder and graphene liquid cells (GLCs) to investigate, for the first time, the in situ nano-bio interactions between titanium dioxide nanoparticles and biological medium...
June 27, 2017: Nanoscale
https://www.readbyqxmd.com/read/28654080/studying-cell-cycle-regulated-gene-expression-by-two-complementary-cell-synchronization-protocols
#9
Aintzane Apraiz, Jone Mitxelena, Ana Zubiaga
The gene expression program of the cell cycle represents a critical step for understanding cell cycle-dependent processes and their role in diseases such as cancer. Cell cycle-regulated gene expression analysis depends on cell synchronization into specific phases. Here we describe a method utilizing two complementary synchronization protocols that is commonly used for studying periodic variation of gene expression during the cell cycle. Both procedures are based on transiently blocking the cell cycle in one defined point...
June 6, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28653417/oral-problems-and-quality-of-life-of-preschool-children-self-reports-of-children-and-perception-of-parents-caregivers
#10
Matheus F Perazzo, Monalisa C Gomes, Érick T Neves, Carolina C Martins, Saul M Paiva, Edja M M de B Costa, Ana F Granville-Garcia
The purpose of this study was to evaluate the association between oral health problems and oral health-related quality of life (OHRQoL) of preschool children according to both self-reports and the reports of parents/caregivers. A school-based, cross-sectional study was conducted with 769 preschool children and their parents/caregivers. The OHRQoL was evaluated using the Scale of Oral Health Outcomes for Five-Year-Old Children (SOHO-5). Based on logistic regression for complex samples, the following variables were found to be associated with poorer OHRQoL in the parent/caregiver version: toothache (OR = 6...
June 27, 2017: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/28653367/significance-of-l-carnitine-for-human-health
#11
REVIEW
María M Adeva-Andany, Isabel Calvo-Castro, Carlos Fernández-Fernández, Cristóbal Donapetry-García, Ana María Pedre-Piñeiro
Carnitine acyltransferases catalyze the reversible transfer of acyl groups from acyl-coenzyme A esters to l-carnitine, forming acyl-carnitine esters that may be transported across cell membranes. l-Carnitine is a wáter-soluble compound that humans may obtain both by food ingestion and endogenous synthesis from trimethyl-lysine. Most l-carnitine is intracellular, being present predominantly in liver, skeletal muscle, heart and kidney. The organic cation transporter-2 facilitates l-carnitine uptake inside cells...
June 26, 2017: IUBMB Life
https://www.readbyqxmd.com/read/28653354/a-new-strategy-for-umbilical-cord-blood-collection-developed-at-the-first-colombian-public-cord-blood-bank-increases-total-nucleated-cell-content
#12
Diana Vanegas, Lady Triviño, Cristian Galindo, Leidy Franco, Gustavo Salguero, Bernardo Camacho, Ana-María Perdomo-Arciniegas
BACKGROUND: The total nucleated cell dosage of umbilical cord blood (UCB) is an important factor in determining successful allogeneic hematopoietic stem cell transplantation after a minimum human leukocyte antigen donor-recipient match. The northern South American population is in need of a new-generation cord blood bank that cryopreserves only units with high total nucleated cell content, thereby increasing the likelihood of use. Colombia set up a public cord blood bank in 2014; and, as a result of its research for improving high total nucleated cell content, a new strategy for UCB collection was developed...
June 26, 2017: Transfusion
https://www.readbyqxmd.com/read/28653224/acquisition-of-anoikis-resistance-promotes-alterations-in-the-ras-erk-and-pi3k-akt-signaling-pathways-and-matrix-remodeling-in-endothelial-cells
#13
Ana Paula de Sousa Mesquita, Silvana de Araújo Lopes, Paulo Castanho A Pernambuco Filho, Helena B Nader, Carla Cristina Lopes
Anoikis is a programmed cell death induced upon cell detachment from extracellular matrix. Anoikis resistance is a critical mechanism in tumor metastasis. Cancer cells deregulate and adapt their metabolism to survive in the absence of adhesion, spreading metastases to distant organs. These adaptations include abnormal regulation of growth factor receptors activating prosurvival signaling pathways, such as the Ras/ERK and PI3K/Akt pathways, and extracellular matrix remodeling, leading to metastasis by an increase of invasiveness and inhibiting anoikis...
June 26, 2017: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/28652981/baseline-values-of-immunologic-parameters-in-the-lizard-salvator-merianae-teiidae-squamata
#14
Ana Paula Mestre, Patricia Susana Amavet, Pablo Ariel Siroski
The genus Salvator is widely distributed throughout South America. In Argentina, the species most abundant widely distributed is Salvator merianae. Particularly in Santa Fe province, the area occupied by populations of these lizards overlaps with areas where agriculture was extended. With the aim of established baseline values for four immunologic biomarkers widely used, 36 tegu lizards were evaluated tacking into account different age classes and both sexes. Total leukocyte counts were not different between age classes...
2017: Open veterinary journal
https://www.readbyqxmd.com/read/28652724/palliative-care-and-prognosis-in-copd-a-systematic-review-with-a-validation-cohort
#15
Pere Almagro, Sergi Yun, Ana Sangil, Mónica Rodríguez-Carballeira, Meritxell Marine, Pedro Landete, Juan José Soler-Cataluña, Joan B Soriano, Marc Miravitlles
Current recommendations to consider initiation of palliative care (PC) in COPD patients are often based on an expected poor prognosis. However, this approach is not evidence-based, and which and when COPD patients should start PC is controversial. We aimed to assess whether current suggested recommendations for initiating PC were sufficiently reliable. We identified prognostic variables proposed in the literature for initiating PC; then, we ascertained their relationship with 1-year mortality, and finally, we validated their utility in our cohort of 697 patients hospitalized for COPD exacerbation...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28652613/flipping-between-polycomb-repressed-and-active-transcriptional-states-introduces-noise-in-gene-expression
#16
Gozde Kar, Jong Kyoung Kim, Aleksandra A Kolodziejczyk, Kedar Nath Natarajan, Elena Torlai Triglia, Borbala Mifsud, Sarah Elderkin, John C Marioni, Ana Pombo, Sarah A Teichmann
Polycomb repressive complexes (PRCs) are important histone modifiers, which silence gene expression; yet, there exists a subset of PRC-bound genes actively transcribed by RNA polymerase II (RNAPII). It is likely that the role of Polycomb repressive complex is to dampen expression of these PRC-active genes. However, it is unclear how this flipping between chromatin states alters the kinetics of transcription. Here, we integrate histone modifications and RNAPII states derived from bulk ChIP-seq data with single-cell RNA-sequencing data...
June 26, 2017: Nature Communications
https://www.readbyqxmd.com/read/28652581/towards-conductive-textiles-coating-polymeric-fibres-with-graphene
#17
Ana I S Neves, Daniela P Rodrigues, Adolfo De Sanctis, Elias Torres Alonso, Maria S Pereira, Vitor S Amaral, Luis V Melo, Saverio Russo, Isabel de Schrijver, Helena Alves, Monica F Craciun
Conducting fibres are essential to the development of e-textiles. We demonstrate a method to make common insulating textile fibres conductive, by coating them with graphene. The resulting fibres display sheet resistance values as low as 600 Ωsq(-1), demonstrating that the high conductivity of graphene is not lost when transferred to textile fibres. An extensive microscopic study of the surface of graphene-coated fibres is presented. We show that this method can be employed to textile fibres of different materials, sizes and shapes, and to different types of graphene...
June 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28652359/triplet-triplet-energy-transfer-in-artificial-and-natural-photosynthetic-antennas
#18
Junming Ho, Elizabeth Kish, Dalvin D Méndez-Hernández, Katherine WongCarter, Smitha Pillai, Gerdenis Kodis, Jens Niklas, Oleg G Poluektov, Devens Gust, Thomas A Moore, Ana L Moore, Victor S Batista, Bruno Robert
In photosynthetic organisms, protection against photooxidative stress due to singlet oxygen is provided by carotenoid molecules, which quench chlorophyll triplet species before they can sensitize singlet oxygen formation. In anoxygenic photosynthetic organisms, in which exposure to oxygen is low, chlorophyll-to-carotenoid triplet-triplet energy transfer (T-TET) is slow, in the tens of nanoseconds range, whereas it is ultrafast in the oxygen-rich chloroplasts of oxygen-evolving photosynthetic organisms. To better understand the structural features and resulting electronic coupling that leads to T-TET dynamics adapted to ambient oxygen activity, we have carried out experimental and theoretical studies of two isomeric carotenoporphyrin molecular dyads having different conformations and therefore different interchromophore electronic interactions...
June 26, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28652306/hepcidin-in-dependent-mechanisms-of-iron-metabolism-regulation-during-infection-by-listeria-and-salmonella
#19
Ana C Moreira, João V Neves, Tânia Silva, Patrícia Oliveira, Maria S Gomes, Pedro N Rodrigues
During bacterial infection, the pathogenic agent and the host battle for iron, due to its importance for fundamental cellular processes. However, iron redistribution and sequestration during infection can culminate in anemia. Although hepcidin has been recognized as the key regulator of iron metabolism, in some infections its levels remain unaffected, suggesting the involvement of other players on iron metabolism deregulation. In this work, we use a mouse model to elucidate the main cellular and molecular mechanisms that lead to iron re-distribution during infection with two different pathogens: Listeria monocytogenes and Salmonella Typhimurium...
June 26, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28652232/characterization-of-a-francisella-tularensis-caenorhabditis-elegans-pathosystem-for-the-evaluation-of-therapeutic-compounds
#20
Elamparithi Jayamani, Nagendran Tharmalingam, Rajmohan Rajamuthiah, Jeffrey J Coleman, Wooseong Kim, Ikechukwu Okoli, Ana M Hernandez, Kiho Lee, Gerard J Nau, Frederick M Ausubel, Eleftherios Mylonakis
Francisella tularensis is a highly infectious Gram-negative intracellular pathogen that causes tularemia. Because of its potential as a bioterrorism agent, there is a need for new therapeutic agents. We therefore developed a whole animal Caenorhabditis elegans-F. tularensis pathosystem for high throughput screening to identify and characterize potential therapeutic compounds. We found that the C. elegans p38 MAP kinase cascade is involved in the immune response to F. tularensis and we developed a robust F. tularensis-mediated C...
June 26, 2017: Antimicrobial Agents and Chemotherapy
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