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https://www.readbyqxmd.com/read/28335411/how-the-cobra-got-its-flesh-eating-venom-cytotoxicity-as-a-defensive-innovation-and-its-co-evolution-with-hooding-aposematic-marking-and-spitting
#1
Nadya Panagides, Timothy N W Jackson, Maria P Ikonomopoulou, Kevin Arbuckle, Rudolf Pretzler, Daryl C Yang, Syed A Ali, Ivan Koludarov, James Dobson, Brittany Sanker, Angelique Asselin, Renan C Santana, Iwan Hendrikx, Harold van der Ploeg, Jeremie Tai-A-Pin, Romilly van den Bergh, Harald M I Kerkkamp, Freek J Vonk, Arno Naude, Morné A Strydom, Louis Jacobsz, Nathan Dunstan, Marc Jaeger, Wayne C Hodgson, John Miles, Bryan G Fry
The cytotoxicity of the venom of 25 species of Old World elapid snake was tested and compared with the morphological and behavioural adaptations of hooding and spitting. We determined that, contrary to previous assumptions, the venoms of spitting species are not consistently more cytotoxic than those of closely related non-spitting species. While this correlation between spitting and non-spitting was found among African cobras, it was not present among Asian cobras. On the other hand, a consistent positive correlation was observed between cytotoxicity and utilisation of the defensive hooding display that cobras are famous for...
March 13, 2017: Toxins
https://www.readbyqxmd.com/read/28335024/impaired-dual-tasking-in-parkinson-s-disease-is-associated-with-reduced-focusing-of-cortico-striatal-activity
#2
Freek Nieuwhof, Bastiaan R Bloem, Miriam F Reelick, Esther Aarts, Inbal Maidan, Anat Mirelman, Jeffrey M Hausdorff, Ivan Toni, Rick C Helmich
Impaired dual tasking, namely the inability to concurrently perform a cognitive and a motor task (e.g. 'stops walking while talking'), is a largely unexplained and frequent symptom of Parkinson's disease. Here we consider two circuit-level accounts of how striatal dopamine depletion might lead to impaired dual tasking in patients with Parkinson's disease. First, the loss of segregation between striatal territories induced by dopamine depletion may lead to dysfunctional overlaps between the motor and cognitive processes usually implemented in parallel cortico-striatal circuits...
March 17, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28334950/downstream-targets-of-gwas-detected-genes-for-breast-lung-and-prostate-and-colon-cancer-converge-to-g1-s-transition-pathway
#3
Olga Y Gorlova, Eugene I Demidenko, Christopher I Amos, Ivan P Gorlov
Genome-wide association studies (GWASs) identified over 500 single nucleotide polymorphisms (SNPs) influencing cancer risk. It is logical to expect the cancer-associated genes to cluster in pathways directly involved in carcinogenesis, e.g. cell cycle. Nevertheless, analyses of the GWAS-detected cancer risk genes usually show no or weak enrichment by known cancer genes.We hypothesized that GWAS-detected cancer risk-associated genes function as upstream regulators of the genes directly involved in carcinogenesis...
March 1, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28334055/the-effect-of-coded-healing-abutments-on-treatment-duration-and-clinical-outcome-a-randomized-controlled-clinical-trial-comparing-encode-and-conventional-impression-protocols
#4
Jaafar Abduo, Chen Chen, Eugene Le Breton, Alexandra Radu, Josephine Szeto, Roy Judge, Ivan Darby
PURPOSE: To compare the Encode impression protocol (Biomet 3i) with the conventional impression protocol in terms of treatment duration, clinical accuracy, and outcome up to the first postplacement review of single-implant crowns. MATERIALS AND METHODS: A total of 45 implants were included in this study. The implants were randomly allocated to the Encode group (23 implants) or the conventional group (22 implants). At the time of surgery, all implants received two-piece Encode healing abutments...
March 23, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28333799/in-reply
#5
David J Garry, Ivan Ngai, Peter S Bernstein, Nancy E Judge
No abstract text is available yet for this article.
April 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28333527/reading-self-perceived-ability-enjoyment-and-achievement-a-genetically-informative-study-of-their-reciprocal-links-over-time
#6
Margherita Malanchini, Zhe Wang, Ivan Voronin, Victoria J Schenker, Robert Plomin, Stephen A Petrill, Yulia Kovas
Extant literature has established a consistent association between aspects of reading motivation, such as enjoyment and self-perceived ability, and reading achievement, in that more motivated readers are generally more skilled readers. However, the developmental etiology of this relation is yet to be investigated. The present study explores the development of the motivation-achievement association and its genetic and environmental underpinnings. Applying cross-lagged design in a sample of 13,825 twins, we examined the relative contribution of genetic and environmental factors to the association between reading enjoyment and self-perceived ability and reading achievement...
April 2017: Developmental Psychology
https://www.readbyqxmd.com/read/28333317/characterization-of-a-gene-encoding-a-membrane-protein-that-affects-exopolysaccharide-production-and-intracellular-mg2-concentrations-in-ensifer-meliloti
#7
Justin P Hawkins, Ivan J Oresnik
Exopolysaccharides play an important role in the physiology of a bacterial cell. Ensifer meliloti is capable of producing at least two types of exopolysaccharides (EPS); succinoglycan, and galactoglucan. In E. meliloti exopolysaccharides are best known for their role in mediating interaction with its symbiotic hosts. It was previously shown that high concentrations of Mg 2+ or K + were capable of suppressing the mucoid phenotype associated with galactoglucan production in an expR+ derivative of Rm1021. In an attempt to determine how Mg 2+ regulates galactoglucan production, SRmD363 was mutagenized and screened for mutants which were visibly mucoid at high concentrations of magnesium...
March 16, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28332608/nutrient-cycling-mechanisms-other-than-the-direct-absorption-from-soil-may-control-forest-structure-and-dynamics-in-poor-amazonian-soils
#8
Oriol Grau, Josep Peñuelas, Bruno Ferry, Vincent Freycon, Lilian Blanc, Mathilde Desprez, Christopher Baraloto, Jérôme Chave, Laurent Descroix, Aurélie Dourdain, Stéphane Guitet, Ivan A Janssens, Jordi Sardans, Bruno Hérault
Tropical forests store large amounts of biomass despite they generally grow in nutrient-poor soils, suggesting that the role of soil characteristics in the structure and dynamics of tropical forests is complex. We used data for >34 000 trees from several permanent plots in French Guiana to investigate if soil characteristics could predict the structure (tree diameter, density and aboveground biomass), and dynamics (growth, mortality, aboveground wood productivity) of nutrient-poor tropical forests. Most variables did not covary with site-level changes in soil nutrient content, indicating that nutrient-cycling mechanisms other than the direct absorption from soil (e...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28332244/a-fluorine-18-radiolabelling-method-enabled-by-rhenium-i-complexation-circumvents-the-requirement-of-anhydrous-conditions
#9
Mitchell Ashley Klenner, Giancarlo Pascali, Bo Zhang, Tiffany Russel Sia, Lawson Kyle Spare, Anwen M Krause-Heuer, Janice Aldrich-Wright, Ivan Greguric, Adam Guastella, Massimiliano Massi, Benjamin Hugh Fraser
Azeotropic distillation is typically required to achieve fluorine-18 radiolabelling during the production of positron emission tomography (PET) imaging agents. However, this time consuming process also limits fluorine-18 incorporation, due to radioactive decay of the isotope and its adsorption to the drying vessel. In addressing these limitations, we herein report the fluorine-18 radiolabelling of one model rhenium(I) complex, which is significantly improved under conditions that do not require azeotropic drying...
March 22, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28331854/dental-age-and-tooth-development-in-orthodontic-patients-with-agenesis-of-permanent-teeth
#10
Jozo Badrov, Tomislav Lauc, Enita Nakaš, Ivan Galić
Objective. To compare the development of permanent teeth in a group of children with the congenitally missing permanent teeth (CMPT) and corresponding nonaffected group. Methods. The formation stages of all developing permanent teeth were determined on 345 panoramic radiographs (OPTs) by the method of Haavikko (1970), and dental age was calculated. The paired samples t-test was used to compare the differences between dental age (DA) and chronological age (CA) in those with CMPT and those not affected. Spearman test was used to evaluate the correlation between DA-CA and the number of missing teeth...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28331543/experimental-recreation-of-the-evolution-of-lignin-degrading-enzymes-from-the-jurassic-to-date
#11
Iván Ayuso-Fernández, Angel T Martínez, Francisco J Ruiz-Dueñas
BACKGROUND: Floudas et al. (Science 336: 1715) established that lignin-degrading fungi appeared at the end of Carboniferous period associated with the production of the first ligninolytic peroxidases. Here, the subsequent evolution of these enzymes in Polyporales, where most wood-rotting fungi are included, is experimentally recreated using genomic information. RESULTS: With this purpose, we analyzed the evolutionary pathway leading to the most efficient lignin-degrading peroxidases characterizing Polyporales species...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28331372/a-glucokinase-gene-mutation-in-a-young-boy-with-diabetes-mellitus-hyperinsulinemia-and-insulin-resistance
#12
Andrey O Emelyanov, Elena Sechko, Ekaterina Koksharova, Igor Sklyanik, Tamara Kuraeva, Alexander Mayorov, Valentina Peterkova, Ivan Dedov
We report the case of a 12-year-old boy with a glucokinase (GCK) mutation, and diabetes with hyperinsulinemia and insulin resistance. For 4 years, the patient intermittently received insulin medications Actrapid HM and Protaphane HM (total dose 5 U/day), with glycated hemoglobin (HbA1c) levels of 6.6%-7.0%. After extensive screening the patient was found to carry a heterozygous mutation (p.E256K) in GCK (MIM #138079, reference sequence NM_000162.3). Insulin therapy was replaced by metformin at 1,700 mg/day...
2017: International Medical Case Reports Journal
https://www.readbyqxmd.com/read/28330933/global-news-highlights
#13
Ivan Barry Pless
No abstract text is available yet for this article.
April 2017: Injury Prevention: Journal of the International Society for Child and Adolescent Injury Prevention
https://www.readbyqxmd.com/read/28329879/hybrid-therapy-of-late-diagnosed-esophageal-perforation-complicated-by-mediastinitis-and-bilateral-empyema
#14
Petko Karagyozov, Tcvetan Minchev, Ivan Tishkov, Ivan Plachkov
No abstract text is available yet for this article.
February 2017: Endoscopy
https://www.readbyqxmd.com/read/28329730/synthesis-of-novel-quinoline-based-4-5-dihydro-1h-pyrazoles-as-potential-anticancer-antifungal-antibacterial-and-antiprotozoal-agents
#15
Jonathan Ramírez-Prada, Sara M Robledo, Iván D Vélez, María Del Pilar Crespo, Jairo Quiroga, Rodrigo Abonia, Alba Montoya, Laura Svetaz, Susana Zacchino, Braulio Insuasty
A new series of N-substituted 2-pyrazolines 9a-f, 10a-f, 11a-f, 12a-f and 13a-f were obtained from the cyclocondensation reaction of [(7-chloroquinolin-4-yl)amino]chalcones 8a-f with hydrazine hydrate and its derivatives. Fourteen of the synthesized compounds including the starting chalcones were selected by US National Cancer Institute (NCI) for testing their anticancer activity against 60 different human cancer cell lines, with the most important GI50 values ranging from 0.28 to 11.7 μM (0.13-6.05 μg/mL) and LC50 values ranging from 2...
March 16, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28329303/high-burden-of-antimicrobial-resistance-and-mortality-among-adults-and-children-with-community-onset-bacterial-infections-in-india
#16
Vidya Mave, Ajay Chandanwale, Anju Kagal, Sandhya Khadse, Dileep Kadam, Renu Bharadwaj, Vaishali Dohe, Matthew Robinson, Aarti Kinikar, Samir Joshi, Priyanka Raichur, Katie McIntire, Savita Kanade, Jonathan Sachs, Chhaya Valvi, Usha Balasubramanian, Vandana Kulkarni, Aaron M Milstone, Ivan Marbaniang, Jonathan Zenilman, Amita Gupta
Background.: In India, antimicrobial consumption is high, yet systematically collected data on the epidemiology, risk factors and outcomes of antimicrobial resistant (AMR) infections are limited. Methods.: A prospective study of adults and children hospitalized for acute febrile illness (AFI) was conducted between August 2013 and December 2015. In-hospital outcomes were recorded, and logistic regression was performed to identify independent predictors of AMR community-onset infections...
March 3, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28329299/rational-and-design-of-eurocrt-an-international-observational-study-on-multi-modality-imaging-and-cardiac-resynchronization-therapy
#17
Erwan Donal, Victoria Delgado, Julien Magne, Chiara Bucciarelli-Ducci, Christophe Leclercq, Bernard Cosyns, Marta Sitges, Thor Edvardsen, Elif Sade, Ivan Stankovic, Eustachio Agricola, Maurizio Galderisi, Patrizio Lancellotti, Alfredo Hernandez, Sven Plein, Denisa Muraru, Ehud Schwammenthal, Gerhard Hindricks, Bogdan A Popescu, Gilbert Habib
Aims: Assessment of left ventricular (LV) volumes and ejection fraction (LVEF) with cardiac imaging is important in the selection of patients for cardiac resynchronization therapy (CRT). Several observational studies have explored the role of imaging-derived LV dyssynchrony parameters to predict the response to CRT, but have yielded inconsistent results, precluding the inclusion of imaging-derived LV dyssynchrony parameters in current guidelines for selection of patients for CRT. METHODS: The EuroCRT is a large European multicentre prospective observational study led by the European Association of Cardiovascular Imaging...
February 27, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28329191/management-of-ventriculoperitoneal-shunt-infections-in-adults-analysis-of-risk-factors-associated-with-treatment-failure
#18
Iván Pelegrín, Jaime Lora-Tamayo, Joan Gómez-Junyent, Nuria Sabé, Dolors García-Somoza, Andreu Gabarrós, Javier Ariza, Pedro Fernández Viladrich, Carmen Cabellos
Background.: Little is known regarding the optimal treatment of ventriculoperitoneal (VP) shunt infections in adults. Our aim was to assess the efficacy of treatment strategies and to identify factors that predict failure. Methods.: Retrospective, observational study of patients aged ≥12 years with VP shunt infections (1980 -2014). Therapeutic approaches were classified under 4 headings: only antibiotics (OA), one-stage shunt replacement (OSSR), two-stage shunt replacement (TSSR), and shunt removal without replacement (SR)...
March 10, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28328784/direct-xa-inhibitors-in-addition-to-antiplatelet-therapy-in-acute-coronary-syndrome-meta-analysis-of-randomized-trials
#19
Pedro A Villablanca, David Holmes, Divyanshu Mohananey, David F Briceno, Ivan J Núñez Gil, Faraj Kargoli, Tanush Gupta, Jorge R Kizer, Anna E Bortnick, Jose Wiley, Mark A Menegus, Robert Pyo, Mario García, Harish Ramakrishna, Farouk Mookadam
OBJECTIVE: We carried out a meta-analysis summarizing the efficacy and safety of direct factor Xa inhibitor (DXI) in patients receiving guideline-based antiplatelet therapy (GBAT) after an acute coronary syndrome. BACKGROUND: Randomized-controlled trials have shown that the addition of a DXI to GBAT after acute coronary syndrome can reduce ischemic events, the trade-off being an increase in major bleeding complications. METHODS: PubMed, Central, Embase, The Cochrane Register, Google Scholar databases, and the scientific session abstracts were searched for eligible randomized trials from 1 January 1990 through 31 December 2016...
March 21, 2017: Coronary Artery Disease
https://www.readbyqxmd.com/read/28327962/optical-properties-of-animal-tissues-in-the-wavelength-range-from-350-to-2600%C3%A2-nm
#20
Serafima A Filatova, Ivan A Shcherbakov, Vladimir B Tsvetkov
No abstract text is available yet for this article.
March 1, 2017: Journal of Biomedical Optics
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