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E H Torres-Montoya, J M Zazueta-Moreno, L U Osuna-Martínez, H Castillo-Ureta, G Silva-Hidalgo, H S López-Moreno, I Osuna-Ramírez, E Noguera-Corona, J G Rendón-Maldonado
Gnathostoma turgidum is a nematode parasite that exploits the stomach of Virginian opossums, Didelphis virginiana, in Latin America. The opossum is the definitive host of G. turgidum in the wild. Intrahepatic growth and maturation of the parasite, subsequent migration to the stomach and spontaneous expulsion are common. However, the histopathological lesions caused by G. turgidum are poorly described. A better understanding of the life cycle of this parasite and the pathological changes in natural host-parasite interactions could help to clarify the progression of human infections caused by Gnathostoma binucleatum...
November 6, 2017: Journal of Helminthology
Felipe Orduña-Bustamante, Pablo Luis Rendón, Erika Martínez-Montejo
A progressive spherical or spheroidal wavefront approximation has previously been found to be a necessary step for a more accurate application of Webster's wave equation to rapidly flaring horns. This leads to a necessary transformation of the horn area function, from the usual flat cross-sectional area in terms of the axial coordinate, into a curved cap-like wavefront area as a function of either the axial coordinate, the arc-length coordinate along the horn profile, the leading curved wavefront coordinate, or still other possible longitudinal coordinates...
October 2017: Journal of the Acoustical Society of America
Renzo Y Loyaga-Rendon, Milena Jani, David Fermin, Jennifer K McDermott, Diane Vancamp, Sangjin Lee
PURPOSE OF REVIEW: The purpose of this review is to describe the current knowledge in prevention and treatment of thrombotic (pump thrombosis and ischemic stroke) and bleeding (gastrointestinal and hemorrhagic stroke) complications in patients supported by continuous-flow left ventricular assist devices (CF-LVAD). RECENT FINDINGS: Left ventricular assist devices (LVADs) are now widely used for the management of end-stage heart failure. Unfortunately, in spite of the indisputable positive impact LVADs have on patients, the frequency and severity of complications are limitations of this therapy...
December 2017: Current Heart Failure Reports
M E Ramírez, Y H Vélez, L Rendón, E Alzate
In this work it was carried out the bioremediation of water containing chlorides with native microalgae (MCA) provided by the Centre for study and research in biotechnology (CIBIOT) at Universidad Pontificia Bolivariana. Microalgae presented an adaptation to the water and so the conditions evaluated reaching a production of CO2 in mg L-1 of 53.0, 26.6, 56.0, 16.0 and 30.0 and chloride removal efficiencies of 16.37, 26.03, 40.04, 25.96 and 20.25% for microalgae1, microalgae2, microalgae3, microalgae4 and microalgae5 respectively...
October 23, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
Christian O Chavarría-Velázquez, Ana C Torres-Martínez, Luis F Montaño, Erika P Rendón-Huerta
Gastric carcinogenesis has been associated to H. pylori virulence factors that induce a chronic inflammation process. Lipopolysaccharides play a role in chronic inflammatory responses via TLR2- and TLR4-dependent signaling pathways. Similarly, cellular invasiveness, metastatic potential and prognosis are usually associated to claudin-4, -6, -7 and -9 expression in gastric carcinogenesis. Therefore, the aim of this study was to determine if H. pylori LPS exerts an influence on carcinogenesis-related claudin expression and if it was directly regulated through the TLR2 pathway...
October 6, 2017: Immunobiology
Inocencio Higuera-Ciapara, Claudia Virués, Marcela Jiménez-Chávez, Evelin Martínez-Benavidez, Javier Hernández, Zaira Domínguez, Roberto López-Rendón, Enrique F Velázquez, Motomichi Inoue
Complex formation of D-glucosamine (Gl) and N-acetyl-D-glucosamine (AGl) with capsaicin (Cp) were studied by (1)H NMR titrations in H2O-d2 and DMSO-d6; capsaicin is the major bioactive component of chili peppers. Every titration curve has been interpreted by formulating a suitable model for the reaction equilibrium, to elucidate intermolecular interactions. In DMSO, glucosamine cations associate with each other to yield linear aggregates, and undergo pseudo-1:1-complexation with capsaicin, the formation constant being ca...
November 27, 2017: Carbohydrate Research
Carlos A Torres-Duque, Zhenia M Fuentes Alcalá, Adrián Rendón, Giovanni Battista Migliori
No abstract text is available yet for this article.
October 5, 2017: Archivos de Bronconeumología
Julio Cesar Rendón, David Cano-Rodríguez, Marianne G Rots
Epigenetic editing is a novel methodology to modify the epigenetic landscape of any genomic location. As such, the approach might reprogram expression profiles, without altering the DNA sequence. Epigenetic alterations, including promoter hypermethylation, are associated with an increasing number of human diseases. To exploit this situation, epigenetic editing rises as a new alternative to specifically demethylate abnormally hypermethylated regions. Here, we describe a methodology to actively demethylate the hypermethylated ICAM-1 promoter...
2017: Methods in Molecular Biology
R Catarino Centeno, R A Bustamante-Rendón, J S Hernández-Fragoso, I Arroyo-Ordoñez, E Pérez, S J Alas, A Gama Goicochea
The interfacial tension between immiscible liquids is studied as a function of a model linear surfactant length and concentration using coarse-grained, dissipative particle dynamics numerical simulations. The adsorption isotherms obtained from the simulations are found to be in agreement with Langmuir's model. The reduction of the interfacial tension with increasing surfactant concentration is found to display some common characteristics for all the values of chain length modeled, with our predictions being in agreement with Szyszkowski's equation...
October 6, 2017: Journal of Molecular Modeling
Alessia Fiorentino, Kaoru Fujinami, Gavin Arno, Anthony G Robson, Nikolas Pontikos, Monica Arasanz Armengol, Vincent Plagnol, Takaaki Hayashi, Takeshi Iwata, Matthew Parker, Tom Fowler, Augusto Rendon, Jessica C Gardner, Robert H Henderson, Michael E Cheetham, Andrew R Webster, Michel Michaelides, Alison J Hardcastle
Retinal dystrophies are a heterogeneous group of disorders of visual function leading to partial or complete blindness. We report the genetic basis of an unusual retinal dystrophy in five families with affected females and no affected males. Heterozygous missense variants were identified in the X-linked PRPS1 gene: c.47C > T, p.(Ser16Phe); c.586C > T, p.(Arg196Trp); c.641G > C, p.(Arg214Pro) and c.640C > T, p.(Arg214Trp). Missense variants in PRPS1 are usually associated with disease in male patients, including Arts Syndrome, Charcot-Marie-Tooth and non-syndromic sensorineural deafness...
October 2, 2017: Human Mutation
Rodolfo Gerónimo Carrillo, Karla Celene Ramos Rendón, Valentina Rivas Acuña, Griselda Hernández Ramírez, Yadira Mateo Crisóstomo
INTRODUCTION: The World Health Organization (WHO) indicates that the consumption of alcoholic beverages at social gatherings is common in many parts of the world and can have negative health and social consequences. Early initiation of alcohol use is a major risk factor for the development of patterns of abusive consumption of alcohol. OBJECTIVES: To analyze the expectations towards alcohol consumption and to identify the age of onset of alcohol use in school children between 8 and 12 years of age...
September 29, 2017: Medwave
Deepak Acharya, Renzo Loyaga-Rendon, Charity J Morgan, Kara A Sands, Salpy V Pamboukian, Indranee Rajapreyar, William L Holman, James K Kirklin, José A Tallaj
OBJECTIVES: This study sought to evaluate predictors of stroke during left ventricular assist device (LVAD) support from data available prior to implantation, and quantify stroke-related morbidity and mortality. BACKGROUND: Stroke is a major complication after LVAD. Pre-implant factors that influence stroke are not well understood. METHODS: We evaluated all patients in INTERMACS (Interagency Registry for Mechanically Assisted Circulatory Support) who were implanted with continuous flow LVADs from May 1, 2012, to March 31, 2015...
October 2017: JACC. Heart Failure
Mónica Echeverry-Rendón, Oscar Galvis, Robinson Aguirre, Sara Robledo, Juan Guillermo Castaño, Félix Echeverría
Surface characteristics can mediate biological interaction improving or affecting the tissue integration after implantation of a biomaterial. Features such as topography, wettability, surface energy and chemistry can be key determinants for interactions between cells and materials. Plasma electrolytic oxidation (PEO) is a technique used to control this kind of parameters by the addition of chemical species and the production of different morphologies on the surfaces of titanium and its alloys. With the purpose to improve the biological response, surfaces of c...
September 27, 2017: Journal of Materials Science. Materials in Medicine
Gema L Batanero, Elizabeth León-Palmero, Linlin Li, Andy J Green, Manuel Rendón-Martos, Curtis A Suttle, Isabel Reche
Waterbird aggregations and droughts affect nutrient and microbial dynamics in wetlands. We analysed the effects of high densities of flamingos on nutrients and microbial dynamics in a saline lake during a wet and a dry hydrological year, and explored the effects of guano on prokaryotic growth. Concentrations of dissolved organic carbon, total phosphorus and total nitrogen in the surface waters were 2-3 fold higher during the drought and were correlated with salinity. Flamingos stimulated prokaryotic heterotrophic production and triggered cascading effects on prokaryotic abundance, viruses and dissolved nitrogen...
September 22, 2017: Scientific Reports
Thea Marubbi, Clare Cassidy, Esther Miller, Martha Koukidou, Enca Martin-Rendon, Simon Warner, Augusto Loni, Camilla Beech
Bactrocera oleae (Diptera: Tephritidae) remains a major pest of olive fruit production worldwide. Current pest management programs largely depend on chemical insecticides, resulting in high economic and environmental costs. Alternative pest control approaches are therefore highly desirable. We have created a conditional female-specific self-limiting strain of B. oleae (OX3097D-Bol) that could be applied for sustainable pest control. OX3097D-Bol olive fly carries a fluorescent marker (DsRed2) for identification and a self-limiting genetic trait that is repressed by tetracycline...
September 13, 2017: Scientific Reports
Margarita Gómez, Nuria Rendón, Eleuterio Álvarez, Kurt Mereiter, Manuel L Poveda, Margarita Paneque
Members of a series of iridacyclopentenes of composition [Tp(Me2) Ir(k(2) -C,C-CH2 CR'=CRCH2 )(CO)] (Tp(Me2) =hydrotris(3,5-dimethylpyrazolyl)borate; R=R'=H, 1; R=Me, R'=H, 2; R=R'=Me, 3) have been subjected to common organic chemistry procedures for hydrogenation, cyclopropanation, epoxidation, water addition through hydroboration, cis-dihydroxylation, and ozonolysis. The stability of metallacycles 1-3, imparted by the presence of the co-ligands Tp(Me2) and CO, directs the reactivity towards the C=C double bonds, and furthermore the stereochemistry of the products formed is strongly dictated by the steric demands of the Tp(Me2) ligand...
September 12, 2017: Chemistry: a European Journal
Mery Yovana Rendón, Maria Brígida Dos Santos Scholz, Neura Bragagnolo
Coffee brew presents sensory, stimulatory and antioxidant properties highly appreciated by consumers, despite being associated with an increase in the level of blood cholesterol due to the effects of the diterpenes, especially cafestol, present in the lipid fraction. Although it is believed that the paper filter retains the brew diterpenes, new studies have shown that sometimes coffee filtered through paper can also increase the blood cholesterol level, putting in doubt the efficiency of the paper filter in retaining the diterpenes...
October 2017: Food Research International
Iliana S Hurtado Rendón, Diego Alcivar, Juan Pablo Rodriguez-Escudero, Kevin Silver
BACKGROUND: Stress Cardiomyopathy is a transient cardiac syndrome characterized by reversible left ventricular systolic dysfunction precipitated by emotional or physiologic stress. The presence of obstructive coronary artery disease has been noted in stress cardiomyopathy. METHODS: Three case reports of patients with acute coronary syndrome and transient wall motion abnormalities not in the distribution of coronary artery disease. RESULTS: We describe three cases of acute myocardial infarction in which the distribution of the culprit coronary occlusion is not concordant with the territory of transient wall motion abnormality...
August 28, 2017: American Journal of Medicine
Edwin Ramírez-Santos, Pedro Rendón, Lorena Ruiz-Montoya, Jorge Toledo, Pablo Liedo
The genetically modified strain of the Mediterranean fruit fly, Ceratitis capitata (Wiedemann) VIENNA 8 1260, was developed from the genetic sexing strain VIENNA 8. It has two molecular markers that exhibit red fluorescence in the body and green fluorescence in testis and sperm. These traits offer a precise tool to discriminate between mass-reared and wild males, increasing the effectiveness of sterile insect technique. The reproductive performance of the VIENNA 8 1260 and VIENNA 8 D53- (without the D53 inversion introduced to prevent recombination) was compared at different irradiation doses...
August 1, 2017: Journal of Economic Entomology
Ketzasmin A Terrón-Mejía, Roberto López-Rendón, Armando Gama Goicochea
The need to extract oil from wells where it is embedded on the surfaces of rocks has led to the development of new and improved enhanced oil recovery techniques. One of those is the injection of surfactants with water vapor, which promotes desorption of oil that can then be extracted using pumps, as the surfactants encapsulate the oil in foams. However, the mechanisms that lead to the optimal desorption of oil and the best type of surfactants to carry out desorption are not well known yet, which warrants the need to carry out basic research on this topic...
August 29, 2017: Scientific Reports
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