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https://www.readbyqxmd.com/read/29045748/conserved-asymmetry-underpins-homodimerization-of-dicer-associated-double-stranded-rna-binding-proteins
#1
Alex Heyam, Claire E Coupland, Clément Dégut, Ruth A Haley, Nicola J Baxter, Leonhard Jakob, Pedro M Aguiar, Gunter Meister, Michael P Williamson, Dimitris Lagos, Michael J Plevin
Double-stranded RNA-binding domains (dsRBDs) are commonly found in modular proteins that interact with RNA. Two varieties of dsRBD exist: canonical Type A dsRBDs interact with dsRNA, while non-canonical Type B dsRBDs lack RNA-binding residues and instead interact with other proteins. In higher eukaryotes, the microRNA biogenesis enzyme Dicer forms a 1:1 association with a dsRNA-binding protein (dsRBP). Human Dicer associates with HIV TAR RNA-binding protein (TRBP) or protein activator of PKR (PACT), while Drosophila Dicer-1 associates with Loquacious (Loqs)...
October 17, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29045535/select-2-a-phase-ii-double-blind-randomised-placebo-controlled-study-to-assess-the-efficacy-of-selumetinib-plus-docetaxel-as-a-second-line-treatment-for-patients-with-advanced-or-metastatic-non-small-cell-lung-cancer
#2
J C Soria, A Fülöp, C Maciel, J R Fischer, G Girotto, S Lago, E Smit, G Ostoros, W E E Eberhardt, P Lishkovska, S Lovick, G Mariani, A McKeown, E Kilgour, P Smith, K Bowen, A Kohlmann, D J Carlile, P A Jänne
Background: Combination of selumetinib plus docetaxel provided clinical benefit in a previous Phase II trial for patients with KRAS-mutant advanced non-small cell lung cancer (NSCLC). The Phase II SELECT-2 trial investigated safety and efficacy of selumetinib plus docetaxel for patients with advanced or metastatic NSCLC. Patients and methods: Patients who had disease progression after first-line anti-cancer therapy were randomised (2:2:1) to selumetinib 75 mg BID plus docetaxel 60 mg/m2 or 75 mg/m2 (SEL+DOC 60; SEL+DOC 75), or placebo plus docetaxel 75 mg/m2 (PBO+DOC 75)...
October 3, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/29042664/cationic-double-k-hole-pre-edge-states-of-cs2-and-sf6
#3
R Feifel, J H D Eland, S Carniato, P Selles, R Püttner, D Koulentianos, T Marchenko, L Journel, R Guillemin, G Goldsztejn, O Travnikova, I Ismail, B Cunha de Miranda, A F Lago, D Céolin, P Lablanquie, F Penent, M N Piancastelli, M Simon
Recent advances in X-ray instrumentation have made it possible to measure the spectra of an essentially unexplored class of electronic states associated with double inner-shell vacancies. Using the technique of single electron spectroscopy, spectra of states in CS2 and SF6 with a double hole in the K-shell and one electron exited to a normally unoccupied orbital have been obtained. The spectra are interpreted with the aid of a high-level theoretical model giving excellent agreement with the experiment. The results shed new light on the important distinction between direct and conjugate shake-up in a molecular context...
October 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29035280/adipocyte-cannabinoid-receptor-cb1-regulates-energy-homeostasis-and-alternatively-activated-macrophages
#4
Inigo Ruiz de Azua, Giacomo Mancini, Raj Kamal Srivastava, Alejandro Aparisi Rey, Pierre Cardinal, Laura Tedesco, Cristina Maria Zingaretti, Antonia Sassmann, Carmelo Quarta, Claudia Schwitter, Andrea Conrad, Nina Wettschureck, V Kiran Vemuri, Alexandros Makriyannis, Jens Hartwig, Maria Mendez-Lago, Laura Bindila, Krisztina Monory, Antonio Giordano, Saverio Cinti, Giovanni Marsicano, Stefan Offermanns, Enzo Nisoli, Uberto Pagotto, Daniela Cota, Beat Lutz
Dysregulated adipocyte physiology leads to imbalanced energy storage, obesity, and associated diseases, imposing a costly burden on current health care. Cannabinoid receptor type-1 (CB1) plays a crucial role in controlling energy metabolism through central and peripheral mechanisms. In this work, adipocyte-specific inducible deletion of the CB1 gene (Ati-CB1-KO) was sufficient to protect adult mice from diet-induced obesity and associated metabolic alterations and to reverse the phenotype in already obese mice...
October 16, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29034215/the-proteome-of-biologically-active-membrane-vesicles-from-piscirickettsia-salmonis-lf-89-type-strain-identifies-plasmid-encoded-putative-toxins
#5
Cristian Oliver, Mauricio A Hernández, Julia I Tandberg, Karla N Valenzuela, Leidy X Lagos, Ronie E Haro, Patricio Sánchez, Pamela A Ruiz, Constanza Sanhueza-Oyarzún, Marcos A Cortés, María T Villar, Antonio Artigues, Hanne C Winther-Larsen, Ruben Avendaño-Herrera, Alejandro J Yáñez
Piscirickettsia salmonis is the predominant bacterial pathogen affecting the Chilean salmonid industry. This bacterium is the etiological agent of piscirickettsiosis, a significant fish disease. Membrane vesicles (MVs) released by P. salmonis deliver several virulence factors to host cells. To improve on existing knowledge for the pathogenicity-associated functions of P. salmonis MVs, we studied the proteome of purified MVs from the P. salmonis LF-89 type strain using multidimensional protein identification technology...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29033607/profiling-of-gene-expression-regulated-by-17%C3%AE-estradiol-and-tamoxifen-in-estrogen-receptor-positive-and-estrogen-receptor-negative-human-breast-cancer-cell-lines
#6
Nelson Rangel, Victoria E Villegas, Milena Rondón-Lagos
One area of great importance in breast cancer (BC) research is the study of gene expression regulated by both estrogenic and antiestrogenic agents. Although many studies have been performed in this area, most of them have only addressed the effects of 17β-estradiol (E2) and tamoxifen (TAM) on MCF7 cells. This study aimed to determine the effect of low doses of E2 and TAM on the expression levels of 84 key genes, which are commonly involved in breast carcinogenesis, in four BC cell lines differentially expressing estrogen receptor (ER) α and HER2 (MCF7, T47D, BT474, and SKBR3)...
2017: Breast Cancer: Targets and Therapy
https://www.readbyqxmd.com/read/29020065/gold-nanoparticles-stabilized-with-%C3%AE-cyclodextrin-2-amino-4-4-chlorophenyl-thiazole-complex-a-novel-system-for-drug-transport
#7
I Asela, M Noyong, U Simon, J Andrades-Lagos, J Campanini-Salinas, D Vásquez-Velásquez, M Kogan, N Yutronic, R Sierpe
While 2-amino-4-(4-chlorophenyl)thiazole (AT) drug and thiazole derivatives have several biological applications, these compounds present some drawbacks, such as low aqueous solubility and instability. A new complex of βCD-AT has been synthesized to increase AT solubility and has been used as a substrate for the deposit of solid-state AuNPs via magnetron sputtering, thus forming the βCD-AT-AuNPs ternary system, which is stable in solution. Complex formation has been confirmed through powder X-ray diffraction and 1D and 2D nuclear magnetic resonance...
2017: PloS One
https://www.readbyqxmd.com/read/28993379/knowledge-attitudes-perceptions-and-habits-towards-antibiotics-dispensed-without-medical-prescription-a-qualitative-study-of-spanish-pharmacists
#8
Juan Vazquez-Lago, Cristian Gonzalez-Gonzalez, Maruxa Zapata-Cachafeiro, Paula Lopez-Vazquez, Margarita Taracido, Ana López, Adolfo Figueiras
OBJECTIVE: To investigate community pharmacists' knowledge, attitudes, perceptions and habits with regard to antibiotic dispensing without medical prescription in Spain. METHODS: A qualitative research using focus group method (FG) in Galicia (north-west Spain). FG sessions were conducted in the presence of a moderator. A topic script was developed to lead the discussions, which were audiorecorded to facilitate data interpretation and transcription. Proceedings were transcribed by an independent researcher and interpreted by two researchers working independently...
October 8, 2017: BMJ Open
https://www.readbyqxmd.com/read/28988033/evidence-of-microglial-activation-following-exposure-to-serum-from-first-onset-drug-na%C3%A3-ve-schizophrenia-patients
#9
Geertje Frederique van Rees, Santiago Guillermo Lago, David Alan Cox, Jakub Tomasik, Nitin Rustogi, Karin Weigelt, Sureyya Ozcan, Jason Cooper, Hemmo Drexhage, F Markus Leweke, Sabine Bahn
Abnormal activation of brain microglial cells is widely implicated in the pathogenesis of schizophrenia. Previously the pathophysiology of microglial activation was considered to be intrinsic to the central nervous system. We hypothesised that due to their perivascular localization, microglia can also be activated by factors present in circulating blood. Through application of high-content functional screening, we show that peripheral blood serum from first-onset drug-naïve schizophrenia patients is sufficient to provoke microglial cell signalling network responses in vitro which are indicative of proinflammatory activation...
October 4, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28987235/effects-of-l-arginine-supplementation-associated-with-continuous-or-interval-aerobic-training-on-chronic-heart-failure-rats
#10
Giovanna Tedesco Barcelos, Douglas Dalcin Rossato, Júlia Luiza Perini, Lucas Pereira Pinheiro, Carol Carvalho, Rodrigo Boemo Jaenisch, Cláudia Ramos Rhoden, Pedro Dal Lago, Ramiro Barcos Nunes
OBJECTIVE: Chronic heart failure (CHF) is related with exercise intolerance and impaired nitric oxide (NO) production, which can lead to several functional capacity alterations. Considering the possible superiority of aerobic interval training compared to continuous training and the capacity of l-arginine to restore the NO pathway, the aim of the present study was to investigate whether these treatments are beneficial to exercise capacity, muscle mass preservation and hemodynamic, inflammatory and oxidative stress parameters in CHF rats...
November 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28983733/bacterial-and-fungal-biodeterioration-of-discolored-building-paints-in-lagos-nigeria
#11
Olayide Obidi, Foluke Okekunjo
Microbial induced discolorations are an unsightly feature occurring on painted walls in Lagos, the commercial hub of Nigeria. Very few studies have been carried out conventionally about the microbial community structure of discolored painted walls in Nigeria therefore, knowledge of the true microbial diversity is elusive. To further our understanding of the phylogenetic diversity of representative microbial community on 40 discolored and three clean-looking buildings, a comparative DNA sequence analysis of 16S rDNA genes was undertaken...
October 5, 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28983000/draft-genome-sequence-analysis-of-multidrug-resistant-escherichia-coli-strains-isolated-in-2013-from-humans-and-chickens-in-nigeria
#12
Poonam Sharma, Sushim K Gupta, Eyitayo O Adenipekun, John B Barrett, Lari M Hiott, Tiffanie A Woodley, Bamidele A Iwalokun, Kolawole S Oyedeji, Afolabi Oluwadun, Hazem Ramadan, Jonathan G Frye, Charlene R Jackson
Here, we present the draft genome sequences of nine multidrug-resistant Escherichia coli strains isolated from humans (n = 6) and chicken carcasses (n = 3) from Lagos, Nigeria, in 2013. Multiple extended-spectrum β-lactamase (ESBL) genes were identified in these isolates.
October 5, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28982174/thermal-adaptation-of-mesophilic-and-thermophilic-ftsz-assembly-by-modulation-of-the-critical-concentration
#13
Luis Concha-Marambio, Paula Maldonado, Rosalba Lagos, Octavio Monasterio, Felipe Montecinos-Franjola
Cytokinesis is the last stage in the cell cycle. In prokaryotes, the protein FtsZ guides cell constriction by assembling into a contractile ring-shaped structure termed the Z-ring. Constriction of the Z-ring is driven by the GTPase activity of FtsZ that overcomes the energetic barrier between two protein conformations having different propensities to assemble into polymers. FtsZ is found in psychrophilic, mesophilic and thermophilic organisms thereby functioning at temperatures ranging from subzero to >100°C...
2017: PloS One
https://www.readbyqxmd.com/read/28981590/a-systematic-review-and-meta-analysis-of-6-thioguanine-nucleotide-levels-and-clinical-remission-in-inflammatory-bowel-disease
#14
Maria Manuela Estevinho, Joana Afonso, Isadora Rosa, Paula Lago, Eunice Trindade, Luís Correia, Cláudia Camila Dias, Fernando Magro
Background and Aims: Thiopurines are widely used in the management of inflammatory bowel diseases. However, their minimum effective dose and dose-response relationship remain undefined, and evidence about their use in clinical practice is mostly heterogeneous. This systematic review and meta-analysis aimed: i] to assess the clinical value of 6-thioguanine nucleotide thresholds; and ii] to compare mean 6-thioguanine nucleotide concentrations between patients in clinical remission vs. those with active disease...
June 30, 2017: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/28981518/phytochemical-characterization-of-the-vochysia-rufa-vochysiaceae-extract-and-its-effects-on-oxidative-stress-in-the-pancreata-of-streptozotocin-induced-diabetic-rats
#15
Neire M de Gouveia, Wellington F Rodrigues, Raquel M F de Sousa, Luciana K Calábria, Antonio V Mundim, Camila B Miguel, Carlo J F Oliveira, Javier E Lazo-Chica, Alberto de Oliveira, João H G Lago, Vagner B Dos Santos, Claudimir L do Lago, Foued S Espindola
Aqueous extract of macerated Vochysia rufa stem bark has been commonly used in the treatment of diabetes. Therefore, we evaluated the antihyperglycemic and antioxidant effects of an extract of V. rufa on the pancreata of streptozotocin (STZ)-induced diabetic rats. Animals received one of the following treatments daily by oral gavage: water (diabetic-control), V. rufa extract (diabetic-V. rufa), or glibenclamide (diabetic-GBD). Total antioxidant capacity; levels of thiobarbituric acid reactive substances, reduced glutathione, and sulfhydryls; and superoxide dismutase, catalase, and glutathione peroxidase (GPx) activities were measured in the pancreas...
2017: PloS One
https://www.readbyqxmd.com/read/28976875/antiplatelet-therapy-in-a-patient-with-coronary-artery-disease-and-myelodysplastic-syndrome-with-thrombocytopenia
#16
Francisco José Fernández-Fernández, Eugenia Ameneiros-Lago, Cintia Tuñas-Gesto, Inmaculada Gómez-Buela
To date, there are no sufficient data to make firm recommendations on the treatment of patients with severe thrombocytopenia who require antiplatelet therapy after experiencing acute coronary syndrome. Therefore, we think that it is important to communicate the experience with individual cases. We report the case of a patient who presented with pericardial effusion causing cardiac tamponade. He had thrombocytopenia associated with myelodysplastic syndrome, and ten weeks before this admission, percutaneous transluminal coronary angioplasty with implantation of drug-eluting stents was performed for non-ST-segment elevation acute coronary syndrome...
2017: Acta Medica (Hradec Králové)
https://www.readbyqxmd.com/read/28971606/methionine-and-vitamin-b-complex-ameliorate-antitubercular-drugs-induced-toxicity-in-exposed-patients
#17
Kennedy I Amagon, Olufunsho Awodele, Abidemi J Akindele
Tuberculosis therapy utilizes drugs that while effective cause treatment-related toxicity. Modulation of antitubercular drugs-induced toxicity by methionine and vitamin B-complex in patients was evaluated. 285 treatment-naïve tuberculosis patients at the Chest Clinics of Infectious Diseases Hospital, Yaba and General Hospital, Lagos in Lagos, Nigeria was prospectively recruited and allotted into test (antitubercular medicines, methionine and vitamin B-complex) and control groups (antitubercular medicines)...
October 2017: Pharmacology Research & Perspectives
https://www.readbyqxmd.com/read/28966749/issues-surrounding-hiv-status-disclosure-experiences-of-seropositive-women-in-lagos-nigeria
#18
Oluwaseun E Oseni, Ifeoma P Okafor, Adekemi O Sekoni
BACKGROUND: Disclosure of human immunodeficiency virus (HIV) seropositivity by infected women is crucial in HIV control. To determine the rates, patterns, effects, and determinants of disclosure of status among HIV-positive women in Lagos, Nigeria. METHODS: This was a descriptive cross-sectional study. Simple random sampling method was used to select 364 HIV-positive women accessing care in HIV treatment centers in Lagos Island. Data were collected using interviewer-administered questionnaires and analyzed with Epi Info (version 3...
2017: International Journal of Preventive Medicine
https://www.readbyqxmd.com/read/28962574/%C3%AE-v%C3%AE-3-integrin-regulates-astrocyte-reactivity
#19
Raúl Lagos-Cabré, Alvaro Alvarez, Milene Kong, Francesca Burgos-Bravo, Areli Cárdenas, Edgardo Rojas-Mancilla, Ramón Pérez-Nuñez, Rodrigo Herrera-Molina, Fabiola Rojas, Pascal Schneider, Mario Herrera-Marschitz, Andrew F G Quest, Brigitte van Zundert, Lisette Leyton
BACKGROUND: Neuroinflammation involves cytokine release, astrocyte reactivity and migration. Neuronal Thy-1 promotes DITNC1 astrocyte migration by engaging αVβ3 Integrin and Syndecan-4. Primary astrocytes express low levels of these receptors and are unresponsive to Thy-1; thus, inflammation and astrocyte reactivity might be necessary for Thy-1-induced responses. METHODS: Wild-type rat astrocytes (TNF-activated) or from human SOD1(G93A) transgenic mice (a neurodegenerative disease model) were used to evaluate cell migration, Thy-1 receptor levels, signaling molecules, and reactivity markers...
September 29, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28959066/breast-cancer-screening-in-a-resource-poor-country-ultrasound-versus-mammography
#20
Olubukola At Omidiji, Princess C Campbell, Nicholas K Irurhe, Omolola M Atalabi, Oluyemisi O Toyobo
BACKGROUND: Breast cancer is the commonest female cancer in Nigeria. Despite its increased awareness, affordability of available screening tools is a bane. Mammography, the goal standard for screening is costly and not widely available in terms of infrastructure, technical/personnel capabilities. Ultrasound is accessible and affordable. OBJECTIVES: This study compared the use of ultrasound and mammography as breast cancer screening tools in women in South West Nigeria by characterizing and comparing the prevalent breast parenchyma, breast cancer features and the independent sensitivity of ultrasound and mammography...
March 2017: Ghana Medical Journal
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