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Retroperitoneal epithelioid sarcoma: A case report

World Journal of Gastrointestinal Endoscopy 2017年第12期9卷 579-582页

作者： JoséA Coronado MigueláChávez Martín A Manrique Jony Cerna ana l trejo Division of Gastrointestinal Endoscopy Hospital Juarez de Mexico Division of anatomic Pahology Hospital Juarez de Mexico

Epithelioid sarcoma(ES), a mesenchymatous malign neoformation, is often diagnosed in later stages and associated with high recurrence index, metastasis and mortality. We report a case of a 65 years old male, with history of abdominal pain and upper gastrointestinal bleeding. Endoscopy demonstrated a posterior duodenal wall perforation communicating with a solid retroperitoneal neoformation. Endoscopic biopsy was performed, with a final report of ES. The patient was submitted for surgical palliation due to the tumor's unresectability. Retroperitoneal ES is an extremely rare condition with limited reports in the literature where guidelines for its optimal treatment are not well established.

关键词： Epithelioid sarcoma Retroperitoneal Mesenchymatous neoformation Duodenal perforation Endoscopy

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Increased serotonin concentration and tryptophan hydroxylase activity in reproductive organs of copulator males:a case of adaptive plasticity

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Advances in Bioscience and Biotechnology 2011年第2期2卷 75-84页

作者： ana Ingrid Pichardo Jose l.Tlachi-lopez Francisco Jimenez-trejo Alma l.Fuentes-Farias Armida Baez-Saldana Maria l.Molina-Ceron Gabriel Manjarrez-Gutierrez Gabriel Gutierrez-Ospina Rosa Angelica lucio Departamento de Biologia Celular y Fisiologia Instituto de Investigaciones BiomedicasUniversidad Nacional Autonoma de MexicoCiudad Universitaria 04510MexicoD.F.Mexico Centro Tlaxcala de Biologia de la Conducta Universidad Autonoma de TlaxcalaCarretera Tlaxcala-Puebla km 1.5 s/nLoma Xicotencatl90062TlaxcalaMexico Departamento de Farmacologia Facultad de MedicinaUniversidad Nacional Autonoma de MexicoCiudad Universitaria 04510MexicoD.F.Mexico laboratorio de Invertebrados y Ecofisiologia Facultad de BiologiaUniversidad Michoacana de San Nicolas de HidalgoCiudad Universitaria 58030MichoacanMexico Unidad de Investigacion Biomolecular Hospital de CardiologiaCentro Medico Nacional Siglo XXIInstituto Mexicano del Seguro Social 06720MexicoD.F.Mexico

Individual male rats may systematically display or not copulatory behavior when paired with receptive females. Although these phenotypes are associated with differences in brain organization and function, they might also do so at the level of the reproductive organs. We then used high performance liquid chromatography to quantify serotonin concentration and the activity of tryptophan hydroxylase in the reproductive organs of copulator and non-copulator males. Sexual behavior display was compared between groups and parameters of fertility and reproductive fitness were determined for copulator males. Copulator males had higher concentrations of serotonin in the epididymis, testicle and ventral prostate than their non-copulator counterparts, as it was found for epididymal and testicular tryptophan hydroxylase activity. However, preliminary data shows that serotonin elevation occurs in copulator males only until they have accumulated several sexual encounters, so it might be a response to genital gratification or sexual rewarding. Interestingly, only epididymal serotonin concentration correlated with reproductive fitness, offspring number, mating success and seminal plug volume in copulator males. Our results support that copulator and non-copulator male rats feature a phenotype-specific serotoninergic tone in the epididymis, testicle and ventral prostate gland. The observation documenting that epididymal serotonin concentration correlated with parameters that monitor male fertility and reproductive fitness in copulator males predicts that epididymal factors increase their chances of parenting offspring.

关键词： Sexual Accessory Glands Copulation Indolamines Seminal Fluid Seminal Plug Successful Mating Reproductive Fitness

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Influence of Humidity on Yield Stress Determination by Slump Test of Slip-Prone Clayey Soils and Their Relation with the Chemical Properties

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Advances in Materials Physics and Chemistry 2012年第4期2卷 102-105页

作者： Arturo F. Méndez-Sánchez ana M. Paniagua-Mercado Karen E. Nieto-Zepeda leonor Pérez-trejo Elvia Diaz Valdés Concepción Mejía García Escuela Superior de Física y Matemáticas Instituto Politécnico Nacional Edif. 9 Unidad Profesional Adolfo López Mateos Col. Lindavista C. P. 07738 México D. F. México.

In this work, the yield stress evaluation as a function of water content for slip-prone clayey soils is studied in order to understand how yield stress decreases as water content increases, and their relation with the chemical properties. The clayey soil samples were taken from the region of Teziutlán-Puebla-Mexico. Yield stress was calculated using the slump test in cylindrical geometry. Results show three zones. The first one shows an exponential decrement on yield stress due to lower water content in accord with clayey soils with high content of illita, followed by a second region where yield stress decreases dramatically at a certain critical water concentration, and the third one where yield stress dependence is not well-defined since the clayey soil flow is seen. Finally, it is discussed how yield stress variation due to the water increment influences the landslide risk increment.

关键词： Clayey Soil Yield Stress Slump Test Microstructure Illita

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