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Fatal arrhythmia following ingestion of hawthorn root (Crataegus pubescens) extract: a case report
Villegas-Belman Sergio,Esparza-Gallegos Thania Carolina,Lizalde-Moreno José Alfredo,Marquez-Romero Juan Manuel 대한응급의학회 2022 Clinical and Experimental Emergency Medicine Vol.9 No.4
The use of extracts from the hawthorn plant as cardiovascular agents dates back to the 1st century; recently, they have also been made available online as weight loss aids. Herein, we present a case of intentional intoxication with hawthorn root extract (HRE) in an adult patient that resulted in death. A 20-year-old female patient, who was clinically diagnosed with depression, developed hypotension, bradycardia, and depressed consciousness after ingestion of this extract. An electrocardiogram recorded a sinus arrest with a slow nodal rhythm, which rapidly deteriorated, leading to cardiac arrest. This case report illustrates the potentially fatal consequences of HRE for which the constituents have not yet been characterized. All physicians, especially those in the emergency department, should be aware of the dangerous, even potentially fatal interactions of HRE with prescription medications.
Villegas-Ruiz, Vanessa,Moreno, Jose,Jacome-Lopez, Karina,Zentella-Dehesa, Alejandro,Juarez-Mendez, Sergio Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.5
There are several existing reports of microarray chip use for assessment of altered gene expression in different diseases. In fact, there have been over 1.5 million assays of this kind performed over the last twenty years, which have influenced clinical and translational research studies. The most commonly used DNA microarray platforms are Affymetrix GeneChip and Quality Control Software along with their GeneChip Probe Arrays. These chips are created using several quality controls to confirm the success of each assay, but their actual impact on gene expression profiles had not been previously analyzed until the appearance of several bioinformatics tools for this purpose. We here performed a data mining analysis, in this case specifically focused on ovarian cancer, as well as healthy ovarian tissue and ovarian cell lines, in order to confirm quality control results and associated variation in gene expression profiles. The microarray data used in our research were downloaded from ArrayExpress and Gene Expression Omnibus (GEO) and analyzed with Expression Console Software using RMA, MAS5 and Plier algorithms. The gene expression profiles were obtained using Partek Genomics Suite v6.6 and data were visualized using principal component analysis, heat map, and Venn diagrams. Microarray quality control analysis showed that roughly 40% of the microarray files were false negative, demonstrating over- and under-estimation of expressed genes. Additionally, we confirmed the results performing second analysis using independent samples. About 70% of the significant expressed genes were correlated in both analyses. These results demonstrate the importance of appropriate microarray processing to obtain a reliable gene expression profile.
Data Mining for Identification of Molecular Targets in Ovarian Cancer
Villegas-Ruiz, Vanessa,Juarez-Mendez, Sergio Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.4
Ovarian cancer is possibly the sixth most common malignancy worldwide, in Mexico representing the fourth leading cause of gynecological cancer death more than 70% being diagnosed at an advanced stage and the survival being very poor. Ovarian tumors are classified according to histological characteristics, epithelial ovarian cancer as the most common (~80%). We here used high-density microarrays and a systems biology approach to identify tissue-associated deregulated genes. Non-malignant ovarian tumors showed a gene expression profile associated with immune mediated inflammatory responses (28 genes), whereas malignant tumors had a gene expression profile related to cell cycle regulation (1,329 genes) and ovarian cell lines to cell cycling and metabolism (1,664 genes).
Two-State GMS-based Friction Model for Precise Control Applications
Fernando Villegas,Rogelio Lorenzo Hecker,Miguel Peña 한국정밀공학회 2016 International Journal of Precision Engineering and Vol.17 No.5
The capability of a model to represent the complex friction behavior is particularly important for systems where friction has a major impact on motion precision. In this work a GMS-based model is proposed which would require only two states, aiming to simplify the implementation of control laws that require friction models capable of representing presliding friction. Simulations of the proposed model are provided, showing that it keeps the main properties of the GMS model, like hysteresis with nonlocal memory, non-drifting behavior and friction lag. Also, an experimental comparison of the performance of model-based compensation for the proposed twostate model and for the complete GMS model is presented for a linear motor system with linear guides, showing promising results.
A. Rivera-Villegas,A. Estrada-Angulo,B.I. Castro-Perez,J.D. Urias-Estrada,F.G. Rios-Rincon,D. Rodriguez-Cordero,A. Barreras,A. Plascencia,V.M.Gonzalez-Vizcarra,J.F. Sosa-Gordillo,R.A. Zinn 아세아·태평양축산학회 2019 Animal Bioscience Vol.32 No.2
Objective: We compare the effects of three different approved sources of supplemental zilpaterol on growth-performance responses and carcass characteristics of finishing lambs. Methods: Twenty four Pelibuey×Katahdin lambs (46.75±2.43 kg) were used in a 33-day feeding trial. Lambs were fed a dry rolled corn-based finishing diet. Treatments consisted of the non-supplemental basal diet (Control) versus the basal diet supplemented with 125 mg zilpaterol/kg of diet (as fed basis) from three commercial sources marketed in Mexico: Zilmax (ZIL), Grofactor, and Zipamix. Results: Compared to controls, zilpaterol (ZH) supplementation did not affect dry matter intake (DMI), but increased carcass adjusted daily weight gain (ADG, 36.7%), gain efficiency (34.2%), and dietary net energy (26.0%), and decreased (23.4%) the ratio of observed:expected DMI. Compared to controls, supplemental ZH increased hot carcass weight (6.4%), dressing percentage (3.2%), m. longissimus thoracis (LM) area (15.6%), and shoulder muscle:fat ratio (28.7%), but decreased kidney-pelvic-heart fat, and fat thickness. Supplemental ZH increased 10.9% and 14.3% whole cut weight of loin and leg, respectively, and the proportion (as percentage of cold carcass weight) of leg (4.3%). These increases were reflected in greater forequarter and hindquarter weights. Lambs fed ZH increased (4.6%) empty body weight (EBW) and reduced (14.7%) liver/spleen weight (as g/kg EBW). Likewise, ZH supplementation tended (p = 0.08) to lower (8.9%) visceral fat. Growth performance, energetic efficiency, hot carcass weight, dressing percentage, LM area and whole cuts were not different across supplemental ZH sources. However, compared with non-supplemented controls, only ZIL appreciably decreased carcass fat distribution, including fat thickness, percentage kidney pelvic and heart fat, shoulder fat, and visceral fat. Conclusion: Supplemental ZH increases ADG, gain efficiency, carcass dressing percentage, and LM area. The magnitude of these responses was similar among ZH sources. Nevertheless, compared with non-supplemented controls, only ZIL appreciably decreases carcass fat. The basis for this is uncertain, but indicative that some practical differences in zilpaterol bio-equivalency may exist across commercial sources tested.
Aculturación Y Estilos de Vida de Los Migrantes Mexicanos en Estados Unidos
Sagrario Garay Villegas,Juan Martell Muñoz 부산외국어대학교 이베로아메리카연구소 2015 이베로아메리카 Vol.17 No.1
El flujo migratorio de mexicanos que se dirigen a Estados Unidos es un hecho conocido y documentado desde hace varias décadas. Las variaciones en las características de los migrantes y en su monto hace que cada vez se torne más complejo el estudio de este fenómeno, y al mismo tiempo permite que se deriven una serie de temas asociados con el desplazamiento, la adaptación de los migrantes en el país receptor y las implicaciones que se originan tanto en los migrantes como en su entorno. En particular en este artículo se tiene como objetivo principal mostrar el papel de la aculturación (vista a través del dominio del idioma inglés) en los estilos de vida de los migrantes mexicanos en Estados Unidos. Para llevar a cabo lo anterior se hace una discusión amplia sobre los procesos migratorios, la aculturación y los estilos de vida de los migrantes; además a partir de la Hispanic Health Care Survey 2007, se realiza una aproximación empírica de los estilos de vida de los migrantes mexicanos más y menos aculturizados. Palabras Clave: Migrantes, Aculturación, Estilos de Vida y Salud. The flow of Mexicans who go to the United States has been studied for several decades. The changes in the amount and the characteristics of the migrants makes more and more complex the study of this phenomenon and, at the same time, it allows to derive a number of issues associated with their displacement, the adaptation of migrants in the host country and the implications that arise both migrants and their context. In particular in this article is aimed to show the role of acculturation (view through the dominance of the English language) on lifestyles of Mexican migrants in the United States. To carry out the above we present a wide discussion on migratory processes, acculturation and the lifestyles of migrants. In addition, we use as source of data the Hispanic Health Care Survey 2007, like an empirical approximation to show the relation between acculturation, lifestyles and health of the Mexican migrants in United States. Key Words: Migrants, Acculturation, Lifestyles and Health