María Hernández‐Trejo, Marcela López‐Hurtado, Saúl Flores‐Medina, María de Jesús de Haro-Cruz, Fernando M. Guerra‐Infante,
... for more papers by this authorMarcela López-Hurtado, Marcela López-Hurtado Departamento de Infectología del Instituto Nacional de ... for more papers by this authorMarcela López-Hurtado, Marcela López-Hurtado Departamento de Infectología del Instituto Nacional de ...
Tópico(s): Pneumonia and Respiratory Infections
2006 - Wiley | Acta Paediatrica
Eliana María Montoya Vélez, Jennifer Marcela López Ríos, Sergio Cristancho, Marcela Valencia Franco, Óscar David Montero De La Rosa, Dora María Hernández-Holguín,
Resumen Este estudio tuvo como objetivo comprender el concepto de salud mental desde la perspectiva de los pueblos indígenas de Colombia. Se realizó una investigación con enfoque cualitativo, de tipo histórico hermenéutico a través de entrevistas a una muestra intencional estratificada de 10 líderes con experiencia en el tema de salud indígena. Luego de transcritas, se realizó el análisis de las entrevistas con herramientas de la teoría fundada. Los hallazgos se centraron en cuatro categorías analíticas: ...
Tópico(s): Health, psychology, and well-being
2020 - ASSOCIAÇÃO BRASILEIRA DE SAÚDE COLETIVA | Ciência & Saúde Coletiva
Marcela López‐Medina, Ismael Carrillo‐Martin, Jessica P. Leyva‐Rangel, Celia Alpuche‐Aranda, Vianney Ortiz‐Navarrete,
We have shown that Salmonella remains for a long period of time within B cells, plasma cells, and bone marrow B cell precursors, which might allow persistence and dissemination of infection. Nonetheless, how infected cells evade CD8 T cell response has not been characterized. Evidence indicates that some pathogens exploit the PD-1: PD-L (PD-L1 and PD-L2) interaction to inhibit CD8 T cells response to contribute the chronicity of the infection. To determine whether the PD-1: PD-L axis plays a role ...
Tópico(s): Immune Cell Function and Interaction
2015 - Elsevier BV | Immunobiology
J.P. Fuentes-Martinez, I. Toledo-Martinez, Perla Román‐Bravo, Patricia García‐Domínguez, Carolina Godoy‐Alcántar, Marcela López‐Cardoso, Hugo Morales‐Rojas,
One dinuclear chlorodiphenyltin (IV) dithiocarbamate complex (1) and four mononuclear complexes of general formula Ph2Sn(S2CNR)Cl (2, 3, 5, and 6) have been synthesized and characterized both in solid-state and solution. X-ray structures for complexes 1, 3 and 6 demonstrated a five-coordination geometry around of tin atoms, in which dithiocarbamate ligand chelates asymmetrically the metal center. As shown by 119Sn NMR spectroscopy, five-coordination geometry observed in the solid-state remains in solution. ...
Tópico(s): Metal complexes synthesis and properties
2009 - Elsevier BV | Polyhedron
Gisell Rodriguez Ferreiro, Lourdes Cancino Badı́as, Marcela López-Nigro, Ana María Palermo, Marta Dolores Mudry, Prieto González Elio, Marta A. Carballo,
Tinidazole (TNZ), ornidazole (ONZ) and metronidazole (MTZ) are antiparasitic drugs (nitroimidazole derivatives) that have proven to be effective against Trichomonas vaginalis, Entoamoeba histolytica, Giardia lamblia and Helicobacter pylori. The reduction of the nitro group and the generation of short-lived reactive intermediates are the basis of its parasiticidal activity. This reduction is associated with its mutagenic activity in bacteria, although in mammalian cells DNA damage seems to be related ...
Tópico(s): Insect and Pesticide Research
2002 - Elsevier BV | Toxicology Letters
Juan Manuel Jimenez-Es, Marcos R. Escobedo-Guerra, Gabriel Arteaga-Tr, Marcela Lopez-Hurt, María de Jesús de Haro-Cruz, Roberto Montes de Oc Jimenez, Fernando M. Guerra‐Infante,
Chlamydophila abortus is one of the pathogens which induce abortion in small ruminants; this pathogen has a tropism for ruminant placenta and causes the disease commonly referred to as Ovine Enzootic Abortion (OEA). In Europe are estimated economic losses of around 20 million pounds a year by OEA. In the American Continent the disease has been reported only in Canada, the United States, Colombia and Chile while in Mexico it is unknown whether OEA is common and it is causing abortions in flocks of ...
Tópico(s): Ruminant Nutrition and Digestive Physiology
2008 - | American Journal of Animal and Veterinary Sciences
Reyna Reyes‐Martínez, Patricia García‐Domínguez, Marcela López‐Cardoso, Herbert Höpfl, Hugo Tlahuext,
Racemic trinuclear diphenyltin(IV) cavitands and capsules have been assembled from diphenyltin(IV) and tris-dithiocarbamate ligands.
Tópico(s): Crystal structures of chemical compounds
2008 - Royal Society of Chemistry | Dalton Transactions
Clara J. Durango-García, J. Óscar C. Jiménez‐Halla, Marcela López‐Cardoso, Virginia Montiel‐Palma, Miguel‐Ángel Muñoz‐Hernández, Gabriel Merino,
The iridum-gallyl complex MeIr(PCy(3))(2)(GaMe(2))(Cl*GaMe(3)) exhibits a short Ir-Ga bond length of 2.381(1)-2.389(2) Å. Theoretical calculations (ZORA BP86/TZ2P) support the presence of a Ir-Ga single bond but highlight a π orbital contribution.
Tópico(s): N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
2010 - Royal Society of Chemistry | Dalton Transactions
Hugo Tlahuext, Reyna Reyes‐Martínez, Gabriela Vargas‐Pineda, Marcela López‐Cardoso, Herbert Höpfl,
Two series of di and trinuclear chlorodiorganotin(IV) complexes derived from bis- and tris-dithiocarbamate ligands have been prepared and structurally characterized. The dinuclear complexes 1–2 of the composition {(R2SnCl)2(bis-dtc)} (1, R = Me; 2, R = nBu) have been obtained from R2SnCl2 (R = Me, nBu) and the triethylammonium salt of N,N′-dibenzyl-1,2-ethylene-bis(dithiocarbamate). The trinuclear complexes 3–9 with the general formula {(R2SnCl)3(tris-dtc)} 3, R = Me, tris-dtc = tris-dtc-Me; 4, R = Me, tris-dtc = tris- ...
Tópico(s): Crystallography and molecular interactions
2010 - Elsevier BV | Journal of Organometallic Chemistry
T. Munguia, Marcela López‐Cardoso, Francisco Cervantes‐Lee, Keith H. Pannell,
Organotin(IV) compounds of the type (o-MeE-C6H4)CH2SnPh3-nCln were synthesized, E = O, n = 0 (1), n = 1 (2), n = 2 (3) and E = S, n = 0 (4), n = 1 (5), n = 2 (6). The complexes exhibit significant trigonal bipyramidal pentacoordination at tin as a consequence of intramolecular Sn−O (1−3) and Sn−S (4−6) interactions upon substitution of the phenyl groups by chloro groups. The intramolecular Sn−O distances in 1, 2, and 3 are 83%, 75%, and 79% of the sum of the van der Waals radii. The equivalent Sn−S values for 4, 5, and ...
Tópico(s): Organometallic Complex Synthesis and Catalysis
2007 - American Chemical Society | Inorganic Chemistry
... Petras & Veltmeyer, Social Movements and State Power. 94. Marcela López Levy, We Are Millions: Neo-liberalism and New ...
Tópico(s): Environmental law and policy
2007 - Taylor & Francis | New Political Economy
María de Jesús de Haro-Cruz, Irma Deleón-Rodriguez, Marcos R. Escobedo-Guerra, Marcela López‐Hurtado, Gabriel Arteaga‐Troncoso, Federico Javier Ortiz-Ibarra, Fernando M. Guerra‐Infante,
It has been reported in several countries that Chlamydia trachomatis genotypes D, E, and F are the ones more frequently associated with urogenital infections. In Mexico, the prevalence of serovars and genotypes is unknown. One hundred and fifty-two endocervical swabs were collected from infertile women to test for C. trachomatis. The PCR-based RFLP and automated-sequencing methods of ompA gene was used to identify the C. trachomatis genotypes. Sequences of 891 pb obtained were aligned with currently ...
Tópico(s): Urinary and Genital Oncology Studies
2011 - Elsevier BV | Enfermedades Infecciosas y Microbiología Clínica
Joan Cid, Núria Nogués, Ruth Montero, Marcela López‐Hurtado, A. Briega, R. Parra,
summary . The aims of the present study were to evaluate the estimated diagnostic accuracy of a new microtube column agglutination system (DG Gel, Diagnostic Grifols, Barcelona, Spain), to analyse the antibody reactivity and to compare the data with the two well‐established DiaMed‐ID and Ortho BioVue systems. We collected 3024 consecutive samples from blood donors, transfusion recipients and pregnant women, and 100 samples containing antibodies of known specificity. All these samples were tested in ...
Tópico(s): Erythrocyte Function and Pathophysiology
2006 - Wiley | Transfusion Medicine
Martín José Zumárraga, Adriana Soutullo, María I. Rodríguez García, Roció Marini, Alejandro Abdala, Héctor D. Tarabla, Susana Torioni de Echaide, Marcela López, Elsa Zervini, Ana Canal, Angel Cataldi,
Bovine tuberculosis (bTB) is a chronic and zoonotic disease due to Mycobacterium bovis. The tuberculosis eradication campaign carried out in Argentina has considerably improved the health situation of the herds. Here we evaluated a strategy to detect M. bovis-infected herds by Touch-Down IS6110 polymerase chain reaction (PCR) in bulk tank raw milk from dairy farms. We evaluated 177 samples from herds with the official tuberculosis free certificate (TFC) and 80 from herds without the certificate, non- ...
Tópico(s): Tuberculosis Research and Epidemiology
2012 - Mary Ann Liebert, Inc. | Foodborne Pathogens and Disease
Ave María Cotero-Villegas, Rubén A. Toscano, Miguel‐Ángel Muñoz‐Hernández, Marcela López‐Cardoso, Patricia García‐Domínguez, Raymundo Cea‐Olivares,
The synthesis of the four disubstituted organotellurium (IV) compounds, C4H8Te[S2P(OCH2)2CEt2]2 (1), C4H8Te[S2P(OCH2)2CMe-nPr]2 (2), C4H8OTe[S2P(OCH2)2CEt2]2 (3), C4H8OTe[S2P(OCH2)2CMe- nPr]2 (4), and one monosubstituted compound C4H8OTe(I)[S2P(OCH2)2CMe-nPr] (5), was achieved. All compounds were characterized by IR, EI, MS, and multinuclear NMR (1H, 13C, 31P, 125Te). In addition, the molecular structures of 2 and 3 were determined by X-ray analyses. Both structures are monomeric and the tellurium atom ...
Tópico(s): Organoselenium and organotellurium chemistry
2005 - Elsevier BV | Journal of Organometallic Chemistry
M. Moretó, E Ojembarrena, Marcela López Rodríguez,
The present study aimed to test the hypothesis that endoscopic sclerotherapy may effectively reduce the occurrence of spasm at the level of the gastric cardia, offering an effective treatment for achalasia.We prospectively treated 33 achalasia patients by repeated injection of ethanolamine oleate at the cardiac level. Twenty patients (series I) were reassessed after six to nine months, with a mean follow-up of 31.5 months (range 13-54 months) after treatment. In an attempt to avoid stricture formation, ...
Tópico(s): Esophageal and GI Pathology
1996 - Thieme Medical Publishers (Germany) | Endoscopy
Paula Rodríguez–Torrico, Claudia Patricia Zuluaga Gómez, Jennifer Marcela López Ríos, Ma C. De Cáceres, Gabriel Ruiz, Margarida Serrano,
To determine the most favorable age for detection of otoacoustic emissions in newborns and for repeated testing.Observational, retrospective, descriptive study in 2,567 newborns.The incidence of any degree of hearing loss was 7 per thousand newborns. It was proportionately higher in the group that did not have otologic risk factors The distribution of otoacoustic emissions by age groups followed a significant linear trend in the first month of life. The time lapse to obtain a positive result on ...
Tópico(s): Ear Surgery and Otitis Media
2004 - Elsevier BV | Acta Otorrinolaringológica Española
Marcela López‐Medina, Araceli Pérez-López, Celia Alpuche‐Aranda, Vianney Ortiz‐Navarrete,
Although B cells and antibodies are the central effectors of humoral immunity, B cells can also produce and secrete cytokines and present antigen to helper T cells. The uptake of antigen is mainly mediated by endocytosis; thus, antigens are often presented by MHC-II molecules. However, it is unclear if B cells can present these same antigens via MHC-I molecules. Recently, Salmonella bacteria were found to infect B cells, allowing possible antigen cross-processing that could generate bacterial peptides ...
Tópico(s): Salmonella and Campylobacter epidemiology
2014 - Frontiers Media | Frontiers in Immunology
Berglind O. Einarsdottir, Roger Olofsson Bagge, Joydeep Bhadury, Henrik Jespersen, Jan Mattsson, Lisa M. Nilsson, Katarina Truvé, Marcela Dávila López, Peter Naredi, Ola Nilsson, Ulrika Stierner, Lars Ny, Jonas A. Nilsson,
... Lisa M. Nilsson 1,4 , Katarina Truvé 5 , Marcela Dávila López 4,5 , Peter Naredi 1,4 , Ola Nilsson ...
Tópico(s): CAR-T cell therapy research
2014 - Impact Journals LLC | Oncotarget
M Mazzeo, J.A. Linares, María Marcela López, Evelin Bachmeier, Fernando Martín Wietz, Víctor Galván, María Cecilia Valentinuzzi, José A. Riveros, A. Finkelberg,
This work presents a chemical and morphological analysis of samples of saliva taken from patients who were under treatment with intravenous chemotherapy with 5‐fluorouracil and leucovorin calcium. Samples of saliva were extracted from fifteen patients during the three stages of the treatment: The initial stage (previous to the chemotherapy), the intermediate stage (during the chemotherapy), and the final stage (twenty‐one days after finishing the treatment). An amount of 50 μl was collected in each ...
Tópico(s): Head and Neck Cancer Studies
2013 - Wiley | Journal of Oral Pathology and Medicine
Marcela López‐Medina, Araceli Pérez-López, Celia Alpuche‐Aranda, Vianney Ortiz‐Navarrete,
Salmonella persists for a long time in B cells; however, the mechanism(s) through which infected B cells avoid effector CD8 T cell responses has not been characterized. In this study, we show that Salmonella infects and survives within all B1 and B2 cell subpopulations. B cells are infected with a Salmonella typhimurium strain expressing an ovalbumin (OVA) peptide (SIINFEKL) to evaluate whether B cells process and present Salmonella antigens in the context of MHC-I molecules. Our data showed that ...
Tópico(s): Immunotherapy and Immune Responses
2015 - Elsevier BV | Immunology Letters
Melissa Baralt, Marcela López Bravo,
Abstract Contrary to common belief, there is a place for grammar teaching in task-based language teaching (TBLT). It is still an unresolved debate, however, what the most effective timing of grammar teaching is around a task. Citing theory, some methodologists argue against grammar in the pre-task phase (e. g., Willis 1996. A framework for task-based learning . Harlow: Longman; Willis and Willis 2007. Doing task-based teaching . Oxford: Oxford University Press), while others argue for it (e. g., DeKeyser ...
Tópico(s): Multilingual Education and Policy
2016 - De Gruyter | Chinese as a Second Language Research
Christos Papadimitriou, Panagiotis Veltsistas, Josef Novosad, Raymundo Cea‐Olivares, Rubén A. Toscano, Patricia García‐Domínguez, Marcela Lopez-Cardosa, Alexandra M. Z. Slawin, J. Derek Woollins,
Reaction of [Ni(CH3CO)2]4H2O, H2PdCl4 or H2PtCl6 with HN[P(Se)Ph2]2 in water/acetone gave the title compounds in good yield. The compounds were characterised by IR/Raman, NMR and X-ray crystallography. The square planar metal centres form parts of spiro pseudo-boat rings. The X-ray structures allow comparison of the radii of Pt and Pd atoms.
Tópico(s): Metal complexes synthesis and properties
1997 - Elsevier BV | Polyhedron
V. García-Montalvo, Josef Novosad, Petr Kilián, J. Derek Woollins, Alexandra M. Z. Slawin, Patricia García‐Domínguez, Marcela López‐Cardoso, Georgina Espinosa‐Pérez, Raymundo Cea‐Olivares,
The [N(PPh 2 Se) 2 ] - ion formed stable bis-chelates with M II (M = Sn, Pb, Zn, Cd or Hg), [M{N(PPh 2 Se) 2 -Se,Se′ } 2 ], which exhibit a large diversity of structural arrangements around the metal, as shown by X-ray crystallography. The tin(II) complex crystallises dimorphically, as yellow triclinic prisms (1) and red tetragonal octahedrons (1′). The yellow isomer is square planar, representing the first example of a true square-planar tin(II) spiro-compound. The red isomer and the lead(II) compound (2) exhibit ...
Tópico(s): Organometallic Complex Synthesis and Catalysis
1997 - Royal Society of Chemistry | Journal of the Chemical Society. Dalton transactions
Marcela López‐Hurtado, M. Velazco-Fernández, M. J. E. Pedraza-Sánchez, Verónica R. Flores‐Salazar, R Villagrana Zesati, Fernando M. Guerra‐Infante,
Chlamydia trachomatis is considered as the bacterium that is more sexually transmitted as cause of male urethritis, epididymitis, orchitis and infertility. A total of 116 semen samples of men whose couples are infertile women were analysed. The quality of the semen was measured by standard procedures recommended by WHO while C. trachomatis was detected by the PCR assay. Thirty-seven semen samples were positive for C. trachomatis (31.9%). Regarding semen analysis, no different values were observed ...
Tópico(s): Sperm and Testicular Function
2017 - Wiley | Andrologia
Marcela López‐Hurtado, Selene García-Romero, Marcos R. Escobedo-Guerra, David Bustos-López, Fernando M. Guerra‐Infante,
Introducción: La infección endocervical por Chlamydia trachomatis es considerada una de las principales causas de infertilidad en todo el mundo. Durante el embarazo puede conducir a complicaciones graves como la ruptura prematura de membranas y los partos prematuros.
Tópico(s): Reproductive tract infections research
2018 - SciELO | Revista chilena de infectología
Carlye Chaney, Marcela López, Kyle S. Wiley, Caitlin Meyer, Claudia Valeggia,
Tópico(s): Health disparities and outcomes
2019 - Springer Science+Business Media | Journal of Racial and Ethnic Health Disparities
Marco A. Escarcega-Tame, Marcela López‐Hurtado, Marcos R. Escobedo-Guerra, Elba Reyes‐Maldonado, Graciela Castro‐Escarpulli, Fernando M. Guerra‐Infante,
Not all human papillomavirus (HPV) infections develop into cervical cancer (CC), so it is proposed that other factors may influence this, such as co-infection with Chlamydia trachomatis (CT). To identify the prevalence of co-infection, we included 189 women with suspicion of HPV. Viral typing was performed by carrying out the Roche HP Linear Array test, while CT detection was performed with the COBAS® TaqMan® 48 kit from Roche. Of the 189 women only 184 had an infection with HPV, CT or both: 56.6% ...
Tópico(s): Genital Health and Disease
2020 - SAGE Publishing | International Journal of STD & AIDS
G.A. Garzón, Carlos Y. Soto, Marcela López-R, Kenneth M. Riedl, Cindi R. Browmiller, Luke R. Howard,
Berries of Vaccinium meridionale Swartz contain a variety of phytochemicals, which are believed to account for their bioactive properties. The potential of Vaccinium meridionale Swartz pomace as a source of bioactive compounds was investigated. The dietary fiber (DF) content was assessed by the AOAC method, phenolic compounds were characterized and quantified via HPLC-PDA and UPLC-QTOF-MS. The in vitro antibacterial activity was tested against Gram-positive and Gram-negative bacteria. The antioxidant ...
Tópico(s): Botanical Research and Applications
2020 - Elsevier BV | Heliyon
Produção Nacional
Revisado por pares
Juan E. Blümel, Eugenio Arteaga, Sócrates Aedo, José Arriola-Montenegro, Marcela López, Mabel Martino, Carlos Henrique Miranda, Octavio Miranda, Desireé Mostajo, Mónica Ñañez, Eliana Ojeda, Susana Pilnik, José Luis Vázquez Rojas, Carlos Salinas, Lida Sosa, Poli Mara Spritzer, Konstantinos Tserotas, María S. Vallejo, Alejandra Belardo, Tayane Muniz Fighera, Peter Chedraui,
Metformin may decrease cell senescence, including bone; hence we aimed at evaluating the association between metformin use and osteoporosis. This was a cross-sectional study carried out in 1259 Latin American adult women aged 40 or more who were not on anti-osteoporotic drugs, were on metformin and had a bone densitometry performed. Of the whole sample, 40.3% reported being on metformin (at least 1 year), 30.2% had type 2 diabetes mellitus and 22.6% had osteoporosis. Median (interquartile range) body ...
Tópico(s): Diet and metabolism studies
2020 - Informa | Gynecological Endocrinology