50 results on '"Nancy Hernández"'
Search Results
2. Aspectos responsables en la experimentación con animales en medicina
- Author
-
Nancy Veronica Alva Arroyo, Rubén Torres García,, José Carlos Gasca Aldama, José Manuel Athie García,, Ibzan Salvador Ibarra, Nancy Hernández-Sánchez, and Ma. Antonieta Valdez de Alba
- Subjects
experimentación animal ,alternativas al uso animal ,bioética ,Medicine (General) ,R5-920 - Abstract
Los animales son las principales víctimas de la historia, esto fue mencionado por primera vez en el texto descrito por Peter Singer La liberación animal. Enfocarse en una ética para el bienestar animal implica situar la mirada en la capacidad de sentir qué experimentan los animales. El bienestar animal es la capacidad de los animales de sentir dolor, sufrimiento, es decir, experimentan emociones.La experimentación animal no es un tema reciente, es un problema que ha existido desde hace muchos años. Un pilar fundamental es el comité de ética institucional, su función es evaluar cada paso antes, y durante la experimentación, verificando el programa, procedimiento, justificación, bienestar, ofrecer un digno y adecuado alojamiento que sea confortable. Cualquier experimentación con animales debe tener una justificación científica, evitar el dolor, sufrimiento, así como tener personal capacitado para salvaguardar su bienestar
- Published
- 2022
- Full Text
- View/download PDF
3. Estructura y variabilidad genética del bisonte americano (Bison bison) en México
- Author
-
Joel Domínguez-Viveros, Guadalupe Nelson Aguilar-Palma, Rafael Villa-Angulo, Nancy Hernández-Rodríguez, José Manuel Pérez-Cantú, Flora Moir, and Pedro Calderón-Domínguez
- Subjects
Heterocigosis ,Recursos genéticos ,Tamaño efectivo de población ,Consanguinidad ,Conservación ,SNP ,Animal culture ,SF1-1100 ,Veterinary medicine ,SF600-1100 - Abstract
Los objetivos fueron analizar la estructura y variabilidad genética del bisonte americano con marcadores genéticos de tipo SNP. Se muestrearon 174 bisontes y se analizaron 42,366 SNP distribuidos en los 29 cromosomas. Se estimó la heterocigosis esperada (He) y observada (Ho), contenido de información polimórfica (CIP), índice de fijación (FIS), índice de Shannon (IS), desequilibrio de ligamiento y relación de parentesco (Rij; %), así como el tamaño efectivo de población (Ne). Se realizó un análisis de estructura genética para inferir cuántas líneas o genomas (k) definen la población. Se identificó y seleccionó un panel con 2,135 SNP polimórficos, con un promedio de 74 SNP por cromosoma. En el proceso de exclusión, 84.5 % fueron monomórficos, 8.5 % con porcentaje de usables menor a 90 %, 6.3 % con frecuencia del alelo menor inferior a 0.01 y 0.70 % por desequilibrio Hardy-Weinberg (P
- Published
- 2023
- Full Text
- View/download PDF
4. Biorremediación de efluentes del cultivo de camarón por medio de consorcios microbianos autóctonos y microalgas nativas en Manabí, Ecuador
- Author
-
Jhonny Navarrete Álava, Patricio Noles Aguilar, Carlos Delgado Villafuerte, Nancy Hernández de Guerrero, and Randi Guerrero-Ríos
- Subjects
penaeus vannamei ,contaminación ,chlamydomonas sp. ,desmodesmus sp. ,chlorella sp. ,trichoderma harzianum ,lactobacillus spp. ,saccharomyces cerevisiae ,contamination ,Geography. Anthropology. Recreation ,Economic biology ,QH705-705.5 ,Ecology ,QH540-549.5 - Abstract
RESUMEN | La camaronicultura es una actividad en constante crecimiento, lo que ha llevado al deterioro de los ecosistemas por la deposición de efluentes que impactan al medio ambiente, generando no solo daños a los ecosistemas sino también a la misma calidad del agua que ingresa al cultivo. Esta investigación busca evaluar la eficiencia de consorcios microbianos autóctonos (in vitro) en la biorremediación del efluente de una finca camaronera ubicada en el sector Cabello Manabí, Ecuador. Para ello, se analizaron los parámetros: fosfatos, amonio, nitritos, nitratos, sólidos en suspensión, oxígeno disuelto, temperatura, pH, DBO5 y coliformes totales. Se utilizó un diseño completamente aleatorio con un factor y 4 niveles y se realizaron 4 tratamientos: consorcio bacteriano (T1) incluyendo la levadura Saccharomyces cerevisiae, consorcio de microalgas (T2), consorcio de hongos (T3) conformado por Trichoderma harzianum, S. cerevisiae, Lactobacillus acidophilus, Bacillus subtilis, Lactobacillus plantarum, y como (T4) un consorcio combinado de los tres tratamientos anteriores. Se observó una diferencia estadísticamente significativa en T2 con respecto a los demás tratamientos, pues debido a sus actividades metabólicas se logró la biorremediación de elementos como fosfatos, compuestos nitrogenados y coliformes totales, mientras que en los demás parámetros no se logró una mejora significativa. El proceso llevado a cabo por las microalgas permitió ajustar los parámetros analizados a criterios de calidad del agua para ser reutilizados en actividades agrícolas y ganaderas e incluso vertidos en cuerpos de agua dulce, concluyendo que la aplicación de microalgas autóctonas de la zona es útil para la biorremediación de los efluentes camaroneros de la localidad. ABSTRACT | Shrimp farming is a constantly growing activity, which has led to the deterioration of ecosystems due to the deposition of effluents that impact the environment, which generates not only damage to ecosystems but also to the same quality of the water that enters the cultivation area. That is why this research seeks to evaluate the efficiency of autochthonous microbial consortia (in vitro) in the bioremediation of the effluent of a shrimp farm located in the Cabello Manabí sector - Ecuador. For this, the following parameters were analyzed: phosphates, ammonium, nitrites, nitrates, suspended solids, dissolved oxygen, temperature, pH, BOD5 and total coliforms. A Completely Randomized Design with one factor and 4 levels was used, using 4 treatments: bacterial consortium (T1) including the yeast Saccharomyces cerevisiae., microalgae consortium (T2)., fungal consortium (T3) made up of Trichoderma harzianum, S. cerevisiae, Lactobacillus acidophilus, Bacillus subtilis, Lactobacillus plantarum., and as (T4) a combined consortium of the three previous treatments. A statistically significant difference was observed in T2 with respect to the other treatments, since thanks to its metabolic activities, the bioremediation of elements such as phosphates, nitrogen compounds and total coliforms was observed, while in the other parameters a significant improvement was not achieved. The process carried out by the microalgae made it possible to adjust the parameters analyzed to water quality criteria to be reused in agricultural and livestock activities and even discharged into freshwater bodies, concluding that the application of microalgae native to the area was useful for the bioremediation of shrimp effluents from the locality.
- Published
- 2022
- Full Text
- View/download PDF
5. Family inherited, prenatal and perinatal risk factors in Cuban children with primary autism
- Author
-
Daniel Quintana Hernández, Paulina Araceli Lantigua Cruz, Teddy Osmin Tamargo Barbeito, Yohandra Calixto Robert, and Nancy Hernández Hernández
- Subjects
autismo, factores de riesgo, genética, ambiente, genealogía, efectos tardíos de la exposición prenatal ,Medicine (General) ,R5-920 ,Public aspects of medicine ,RA1-1270 - Abstract
Introduction: Primary autism is a heterogeneous neurobehavioral disorder of uncertain etiology in which both genes and the environment contribute to the pathogenesis of the disorder. Objective: To identify family inherited, prenatal and perinatal risk factors in Cuban children with primary autism. Material and Methods: An observational case-control study (1:1) was carried out in children with primary autism, treated at "Juan Manuel Márquez" Pediatric Hospital, Havana, in the period from October of 2014 to September of 2019. The sample was made up of 126 cases and 126 controls. Data on neuropsychiatric diseases, prenatal and perinatal history of three generations were collected. Multivariate logistic regression was performed to identify risk factors related to primary autism. Results: The odds of presenting primary autism were approximately seven and four times higher in children of mothers and fathers of advanced ages, respectively. A history of language disorders and epilepsy in first-degree relatives conferred 27- and 24-fold higher odds of presenting with autism, respectively. The odds of presenting autism were approximately ten times greater in children born to pregnant women with anemia, eight times in children born to pregnant women who had bleeding during pregnancy, and 18 times in those born to mothers with a history of pregestational diabetes mellitus. Conclusions: The history of inherited neuropsychiatric diseases and prenatal and perinatal environmental factors related to hypoxemic events are risk factors for primary autism in the sample of Cuban children studied.
- Published
- 2022
6. Improvement in borderline personality disorder symptomatology after repetitive transcranial magnetic stimulation of the dorsomedial prefrontal cortex: preliminary results
- Author
-
Angel R. Calderón-Moctezuma, Julian V. Reyes-López, René Rodríguez-Valdés, Mario Barbosa-Luna, Josefina Ricardo-Garcell, Marbella Espino-Cortés, Nancy Hernández-Chan, Lorena García-Noguez, Georgina Roque-Roque, Gerardo Trejo-Cruz, Sofía Cañizares-Gómez, and Hebert Hernández-Montiel
- Subjects
Borderline personality disorder ,repetitive transcranial magnetic stimulation ,dorsomedial prefrontal cortex ,Psychiatry ,RC435-571 - Abstract
Objective: Current treatment for borderline personality disorder (BPD) involves psychological and pharmacological interventions. However, neuromodulation techniques such as repetitive transcranial magnetic stimulation (rTMS) may positively affect BPD symptomatology. The objective of this study was to evaluate the clinical and neuropsychological effects of rTMS on the dorsomedial prefrontal cortex (DMPFC) in BPD patients. Methods: Fourteen patients with BPD were randomized into two groups (active vs. sham) for 15 sessions of rTMS on the DMPFC. Clinical effects were measured using the Borderline Symptoms List (BSL), Clinical Global Impression Scale for BPD (CGI-BPD), Borderline Evaluation of Severity over Time (BEST), Hamilton Depression Rating Scale (HDRS), Hamilton Anxiety Rating Scale (HARS), and Barratt’s Impulsiveness Scale (BIS). Neuropsychological effects were determined by a Stop-Signal Task (SST), the Wisconsin Card-Sorting Test (WCST), and the Iowa Gambling Test (IGT). Results: Within-group comparison showed significant differences (p < 0.05) in CGI-BPD (total score and six of nine psychopathologic domains), BEST, HDRS, HARS, and IGT scores for active modality. Conclusion: The 5 Hz-DMPFC rTMS technique was well tolerated and lessened the severity of BPD symptomatology, especially abandonment, affective issues, interpersonal relationships, suicidal behavior, anger, and paranoid ideation. Cognitive improvement was seen in decision-making. Additional studies are needed to fully evaluate the effects of rTMS on BPD symptomatology. Clinical Trial Registration: NCT03832777.
- Published
- 2020
- Full Text
- View/download PDF
7. Análisis de necesidades y justificación para crear un modelo de planeación de la innovación del diseño de nuevos productos
- Author
-
Jaime Garnica González, Nancy Hernández Hernández, and Heriberto Niccolas Morales
- Subjects
Commerce ,HF1-6182 ,Business ,HF5001-6182 - Abstract
Esta investigación descriptiva tiene el propósito de mostrar el análisis de diversas técnicas, métodos y metodologías utilizadas en el diseño de nuevos productos con el objeto de plantear los argumentos que debe contener un modelo de planeación para la innovación de productos. Se realizó la localización de documentos clave, fijación de datos, análisis de contenido, clasificación y síntesis de la información, obteniendo como resultado una clasificación de las técnicas, métodos o metodologías de acuerdo a diversas áreas de análisis. Esta clasificación también indica el propósito que tienen al aplicarlas. El resultado del estudio es la discusión e implicaciones de las técnicas, métodos y metodologías identificadas en la literatura, enfatizado que en la construcción de un modelo de planeación de la innovación del diseño de productos debe hacerse explicita la relación de los diferentes planos de la planeación, como son: el normativo, estratégico, táctico, operacional y la planeación de recursos.
- Published
- 2016
8. Incidence of Delirium in Critically Ill Cancer Patients
- Author
-
Luis A. Sánchez-Hurtado, Nancy Hernández-Sánchez, Mario Del Moral-Armengol, Humberto Guevara-García, Francisco J. García-Guillén, Ángel Herrera-Gómez, and Silvio A. Ñamendys-Silva
- Subjects
Medicine (General) ,R5-920 - Abstract
Objective. The aim of this study was to estimate the incidence of delirium and its risk factors among critically ill cancer patients in an intensive care unit (ICU). Materials and Methods. This is a prospective cohort study. The Confusion Assessment Method for the Intensive Care Unit (CAM-ICU) was measured daily at morning to diagnose delirium by a physician. Delirium was diagnosed when the daily was positive during a patient’s ICU stay. All patients were followed until they were discharged from the ICU. Using logistic regression, we estimated potential risk factors for developing delirium. The primary outcome was the development of ICU delirium. Results. There were 109 patients included in the study. Patients had a mean age of 48.6 ± 18.07 years, and the main reason for admission to the ICU was septic shock (40.4%). The incidence of delirium was 22.9%. The mortality among all subjects was 15.6%; the mortality rate in patients who developed delirium was 12%. The only variable that had an association with the development of delirium in the ICU was the days of use of mechanical ventilation (OR: 1.06; CI 95%: 0.99–1.13;p=0.07). Conclusion. Delirium is a frequent condition in critically ill cancer patients admitted to the ICU. The duration in days of mechanical ventilation is potential risk factors for developing delirium during an ICU stay. Delirium was not associated with a higher rate of mortality in this group of patients.
- Published
- 2018
- Full Text
- View/download PDF
9. Diagnóstico ecológico para la conservación de Jatropha spp. (Euphorbiaceae) y sus hábitats, en la Reserva Tehuacán-Cuicatlán, México
- Author
-
Nancy Hernández-Nicolás, Leobigildo Córdova-Téllez, Angélica Romero-Manzanares, Jaime Jiménez-Ramírez, Ricardo Lobato-Ortiz, and Jesús Cuevas-Sánchez
- Subjects
especies de Jatropha ,unidades ambientales ,Bosque Tropical Caducifolio ,disturbio ,vulnerabilidad ,México ,Biology (General) ,QH301-705.5 - Abstract
Jatropha spp., es un importante recurso fitogenético usado como alimento, medicina y biocombustible. En este estudio verificamos la identidad taxonómica de las especies de Jatropha para la Reserva de la Biosfera Tehuacán-Cuicatlán, y las unidades ambientales (UA) que ocupan. Evaluamos el estado de conservación de sus hábitats y la vulnerabilidad de las poblaciones de Jatropha. Los sitios de muestreo seleccionados en la Reserva fueron 15. El trabajo taxonómico estuvo basado en especímenes, descripciones originales y material tipo de herbarios y aquellos en línea. Las UA fueron clasificadas mediante variables biofísicas y el software gvSIG. Los atributos ecológicos fueron determinados con análisis cuantitativo por el método de cuadrado centrado en un punto; el disturbio fue estimado a través de indicadores de sitio, y el estado de conservación de las poblaciones de Jatropha con el Método para la Evaluación de Riesgo de Extinción de Plantas en México (MER). Jatropha frecuentemente dominó la fisonomía de las comunidades vegetales. La distribución actual de las especies de Jatropha en la Reserva estuvo principalmente determinada por las variables altitud, temperatura y precipitación. Las especies confirmadas fueron: Jatropha ciliata Sessé ex Cerv., Jatropha neopauciflora Pax, Jatropha oaxacana J. Jiménez Ram. & R. Torres, Jatropha rufescens Brandegee, y Jatropha rzedowskii J. Jiménez Ram., las cuales estuvieron distribuidas en cuatro de las seis UA definidas. J. neopauciflora y J. rzedowskii son las especies más ampliamente distribuidas; estas últimas especies concurrieron en cuatro, J. oaxacana en dos, mientras que J. rufescens y J. ciliata en una UA, siendo ésta la especie más restringida. La riqueza de géneros en las comunidades asociadas varió entre 16 y 42. Los máximos y mínimos Índices de Valores de Importancia fueron observados en San Nicolás Tepoxtitlan para J. neopauciflora (53.75%) y J. rzedowskii (1.50%). El índice de disturbio varió entre 0.22 y 0.82, con promedio de 0.51, mientras que la variable ganado tuvo mayor contribución. Considerando las categorías de riesgo del MER, concluimos que J. oaxacana requiere protección especial, mientras que J. ciliata y J. rufescens fueron especies en riesgo de extinción. El estado de conservación de los hábitats ocupados por poblaciones de Jatropha spp. es moderado, tomando en cuenta la tasa de disturbio. Los principales factores que afectan a los hábitats de Jatropha son el ganado y las actividades humanas; la composición florística de las comunidades vegetales tuvo baja riqueza. Estos resultados apoyan la necesidad de establecer estrategias de conservación para evitar la pérdida de importantes poblaciones silvestres de Jatropha.
- Published
- 2015
10. Efectividad de la crema de Aloe vera en pacientes con psoriasis vulgar de la Parroquia San Fernando
- Author
-
Yoisel Belen Ruiz, Nancy Hernández León, Olga Lidia Pereira Despaigne, Maricela Silvia Palay Despaigne, and Rafael M Neyra Barrios
- Subjects
psoriasis vulgar ,Aloe vera ,triamcinolona ,Venezuela ,Medicine (General) ,R5-920 ,Internal medicine ,RC31-1245 - Abstract
Se realizó un estudio de intervención terapéutica en 20 pacientes con psoriasis vulgar, pertenecientes a la Parroquia San Fernando, en Montes, Estado Sucre (Venezuela), de mayo a diciembre del 2013, quienes fueron seleccionados aleatoriamente y asignados en 2 grupos de idéntica cantidad de integrantes: el de control, que utilizó medicación convencional con triamcinolona, y el de estudio, que recibió tratamiento tópico con crema de Aloe vera (sábila) de base inerte; a fin de determinar la efectividad de esta última. Para establecer la comparación entre ambos grupos, se emplearon técnicas no paramétricas debido al número reducido de pacientes, y siempre se consideró un nivel de significación de 0,05. Se obtuvo que la modalidad terapéutica con crema de sábila fuera tan efectiva como la aplicación de la triamcinolona, pero a diferencia de esta última, no presentó reacciones adversas. Así, pudo concluirse que la terapia con Aloe vera es efectiva para tratar pacientes con psoriasis vulgar
- Published
- 2014
11. The Blood Banks and their functioning
- Author
-
Sara Jimenez, Nancy Hernández, and Martha Eslava
- Subjects
blood bank ,blood group ,serology ,pretransfusional test ,Medicine - Published
- 1999
12. Altered Prion protein expression pattern in CSF as a biomarker for Creutzfeldt-Jakob disease.
- Author
-
Mauricio Torres, Luis Cartier, José Manuel Matamala, Nancy Hernández, Ute Woehlbier, and Claudio Hetz
- Subjects
Medicine ,Science - Abstract
Creutzfeldt-Jakob disease (CJD) is the most frequent human Prion-related disorder (PrD). The detection of 14-3-3 protein in the cerebrospinal fluid (CSF) is used as a molecular diagnostic criterion for patients clinically compatible with CJD. However, there is a pressing need for the identification of new reliable disease biomarkers. The pathological mechanisms leading to accumulation of 14-3-3 protein in CSF are not fully understood, however neuronal loss followed by cell lysis is assumed to cause the increase in 14-3-3 levels, which also occurs in conditions such as brain ischemia. Here we investigated the relation between the levels of 14-3-3 protein, Lactate dehydrogenase (LDH) activity and expression of the prion protein (PrP) in CSF of sporadic and familial CJD cases. Unexpectedly, we found normal levels of LDH activity in CJD cases with moderate levels of 14-3-3 protein. Increased LDH activity was only observed in a percentage of the CSF samples that also exhibited high 14-3-3 levels. Analysis of the PrP expression pattern in CSF revealed a reduction in PrP levels in all CJD cases, as well as marked changes in its glycosylation pattern. PrP present in CSF of CJD cases was sensitive to proteases. The alterations in PrP expression observed in CJD cases were not detected in other pathologies affecting the nervous system, including cases of dementia and tropical spastic paraparesis/HTLV-1 associated myelopathy (HAM/TSP). Time course analysis in several CJD patients revealed that 14-3-3 levels in CSF are dynamic and show a high degree of variability during the end stage of the disease. Post-mortem analysis of brain tissue also indicated that 14-3-3 protein is upregulated in neuronal cells, suggesting that its expression is modulated during the course of the disease. These results suggest that a combined analysis of 14-3-3 and PrP expression pattern in CSF is a reliable biomarker to confirm the clinical diagnosis of CJD patients and follow disease progression.
- Published
- 2012
- Full Text
- View/download PDF
13. Asymmetric transfer efficiencies between fomites and fingers: Impact on model parameterization
- Author
-
Greene, Christine, Ceron, Nancy Hernandez, Eisenberg, Marisa C., Koopman, James, Miller, Jesse D., Xi, Chuanwu, and Eisenberg, Joseph N.S.
- Published
- 2018
- Full Text
- View/download PDF
14. The Conquest in Cultural Memory
- Author
-
Nova, Leslie Nancy Hernández, primary
- Published
- 2019
- Full Text
- View/download PDF
15. Efecto del óxido nítrico inhalado en la mecánica ventilatoria y oxigenación de pacientes con hipoxemia grave refractaria a prono prolongado y bloqueo neuromuscular secundario a infección por SARS-CoV-2
- Author
-
Alejandro Castro Serrano, Armando Sánchez Calzada, Janet Silvia Aguirre Sánchez, Rodrigo Chaires Gutiérrez, and Nancy Hernández Sánchez
- Published
- 2022
- Full Text
- View/download PDF
16. EL TERCERO CONSTITUCIONAL A DEBATE
- Author
-
María Aguilar, Eduardo Aguiñaga, Jose Barba, Luis Bautista, Emigdio Becerra, Cecilia Bossi, Mario Benavides, Teresa Bracho, Manuel Bravo, Dulce Cabrera, David Calderon, Jose Carbajal, Nancy Carmona, Juan Ceron, Yedidi Chavez, Victor Collí, Francisco Conde, Graciela Cortés, Magdalena Díaz, Vicente Flores, Lorenzo Gómez, José González, Marina Hernández, Luisa Hernandez, Martha Hernández, Guillermo Hernández, Nancy Hernández, Juana Islas, Jorge Lavín, Leyla Leo, Álvaro Marín, Violeta Mendezcarlo, Francisco Miranda, Carlos Molina, Alejandro Ortiz, Maria Peredo, Francisco Pérez, Leticia Pons, Mauricio Reyes, Antonio Rosalió, Rosalina Romero, Luis Sosa, Yvonne Tovar, Jesus Trujillo, Daniel Valdez, Gloria Valdéz, Miguel Vértiz, and Erica Villamil
- Abstract
Educación laica, gratuita, obligatoria, integral, científica, democrática, nacionalista y de calidad, como valores para la educación pública que se han incorporado y evolucionado a través del tiempo, han dado sentido y orientación a la acción gubernamental durante gran parte del siglo que ha cumplido la Constitución mexicana de 1917; sin embargo, parecen aún lejanos e insuficientes para configurar el proyecto educativo del México futuro. Por ello, el debate sobre el derecho a la educación, si bien tiene varias décadas de estar presente entre especialistas y académicos, parece más pertinente hoy, frente a las dificultades y controversias que ha enfrentado la reforma educativa de 2013. El centenario del Artículo Tercero Constitucional es un marco simbólico que brinda la oportunidad de compendiar el estado actual de su debate, mismo que se ha logrado gracias a la colaboración entre la Universidad Pedagógica Nacional, la Facultad Latinoamericana de Ciencias Sociales-México (flacso) y la Comisión de Educación del Senado de la República lxiii Legislatura, que además abre la posibilidad para la reflexión permanente sobre los retos que deberá enfrentar, en los años venideros, este importante derecho humano. Para hacer un justo reflejo del debate nacional, la pluralidad se planteó como uno de los principales objetivos de esta obra. Las contribuciones que se encuentran incluidas fueron desarrolladas por sus autores, en respuesta a una convocatoria de la Universidad Pedagógica Nacional y la Comisión de Educación del Senado de la República lxiii Legislatura, buscando que todo interesado en el tema que tuviera algo que aportar al debate pudiese hacerlo, siempre en un marco de tolerancia al derecho de otros de disentir, condición que los autores participantes mostraron en un elevado ejemplo de capacidad de diálogo y debate entre pares, donde las posturas totalizantes cedieron el paso a la crítica reflexiva.
- Published
- 2022
- Full Text
- View/download PDF
17. Nutrición enteral y síndrome de realimentación en paciente con anorexia nervosa y COVID-19
- Author
-
Nancy Verónica Alva-Arroyo, Nancy Hernández-Sánchez, José Carlos Gasca-Aldama, and María Antonieta Valdez de Alba (†)
- Subjects
General Medicine - Abstract
Introducción: la evidencia en la prevalencia de COVID-19 relacionado con los problemas de salud es una emergencia. Reporte de caso: mujer de 28 años, con TCA (trastorno conductual de la alimentación) desde los 12 años. IMC (índice de masa corporal) 13.6 kg/m2. Hospitalizada por padecimiento respiratorio (broncoespasmo) debido a COVID-19, con oxígeno suplementario dos litros, durante su estancia rechazo a los alimentos, se colocó sonda nasogástrica, iniciando nutrición enteral estándar, presentando síndrome de realimentación (SRL), manejo con electrólitos y se modificó la dieta enteral baja en carbohidratos, alta en proteínas y terapia psicológica por videollamada. Recuperando estado de salud y egreso a domicilio. Discusión: las complicaciones de realimentación aumentan cuando se inicia una tasa calórica alta. La fórmula enteral estándar contiene 54% de carbohidratos, el cual contribuye al riesgo de desarrollar SRL. Se desconocen las consecuencias de TCA y COVID-19 y es probable que se vuelva más evidente con el tiempo.
- Published
- 2022
- Full Text
- View/download PDF
18. Mediator subunit 12 coordinates intrinsic and extrinsic control of epithalamic development
- Author
-
Wu, Shu-Yu, de Borsetti, Nancy Hernandez, Bain, Emily J., Bulow, Christopher R., and Gamse, Joshua T.
- Published
- 2014
- Full Text
- View/download PDF
19. COVID-19 en pacientes con lupus eritematoso sistémico y mortalidad
- Author
-
Nancy Verónica Alva Arroyo, Nancy Hernández-Sánchez, José Carlos Gasca-Aldama, and Ibzan Salvador-Ibarra
- Subjects
General Medicine - Abstract
Desde diciembre de 2019, una nueva enfermedad causada por coronavirus 2019 (COVID19), estalló en Wuhan, China. Causante del síndrome respiratorio agudo severo (SARS-CoV2) Algunos casos asocian COVID-19 y trastornos autoinmunes; el papel de este virus en la autoinmunidad esta poco dilucidada. El lupus eritematoso sistémico (LES) es una enfermedad autoinmune. El Baricitinib es una molécula inhibidora de quinasa de Janus (JAK) aprobada para el tratamiento de trastornos autoinmunitarios e inflamatorios, recientemente utilizado para el manejo de la enfermedad grave por COVID-19. Se trata de 4 casos de LES con COVID 19, dos de las cuales ingresaron a la unidad de cuidados intensivos, fallecieron; con antecedente de nefritis lúpica. Los dos casos siguientes sobrevivieron. Aún se desconocen los factores de riesgo que incrementan la mortalidad en LES, sin embargo, se asoció nefritis lúpica con mortalidad en COVID-19. Se requieren más estudios para comprender el riesgo entre las enfermedades autoinmunes y COVID-19.
- Published
- 2022
- Full Text
- View/download PDF
20. Light and melatonin schedule neuronal differentiation in the habenular nuclei
- Author
-
de Borsetti, Nancy Hernandez, Dean, Benjamin J., Bain, Emily J., Clanton, Joshua A., Taylor, Robert W., and Gamse, Joshua T.
- Published
- 2011
- Full Text
- View/download PDF
21. Melatonin Suppresses Nighttime Memory Formation in Zebrafish
- Author
-
Rawashdeh, Oliver, de Borsetti, Nancy Hernandez, Roman, Gregg, and Cahill, Gregory M.
- Published
- 2007
- Full Text
- View/download PDF
22. Aspectos responsables en la experimentación con animales en medicina
- Author
-
Ma. Antonieta Valdez de Alba, Nancy Hernández Sánchez, Ibzan Salvador Ibarra, José Manuel Athie García, José Carlos Gasca Aldama, Rubén Torres García, and Nancy Veronica Alva Arroyo
- Abstract
Los animales son las principales víctimas de la historia, esto fue mencionado por primera vez en el texto descrito por Peter Singer La liberación animal. Enfocarse en una ética para el bienestar animal implica situar la mirada en la capacidad de sentir qué experimentan los animales. El bienestar animal es la capacidad de los animales de sentir dolor, sufrimiento, es decir, experimentan emociones.La experimentación animal no es un tema reciente, es un problema que ha existido desde hace muchos años. Un pilar fundamental es el comité de ética institucional, su función es evaluar cada paso antes, y durante la experimentación, verificando el programa, procedimiento, justificación, bienestar, ofrecer un digno y adecuado alojamiento que sea confortable. Cualquier experimentación con animales debe tener una justificación científica, evitar el dolor, sufrimiento, así como tener personal capacitado para salvaguardar su bienestar.
- Published
- 2022
- Full Text
- View/download PDF
23. Alzheimer’s disease and the autophagic-lysosomal system
- Author
-
Andrew Sproul, Kyung Min Chung, Wai Haung Yu, and Nancy Hernández
- Subjects
0301 basic medicine ,Proteasome Endopeptidase Complex ,Protein Folding ,Population ,Tau protein ,tau Proteins ,Disease ,Protein degradation ,Protein aggregation ,03 medical and health sciences ,Alzheimer Disease ,Autophagy ,Extracellular ,Animals ,Humans ,Medicine ,education ,Neurons ,education.field_of_study ,Amyloid beta-Peptides ,biology ,business.industry ,General Neuroscience ,Biological Transport ,Neurodegenerative Diseases ,030104 developmental biology ,Proteolysis ,biology.protein ,Lysosomes ,business ,Neuroscience ,Intracellular - Abstract
Age-related neurodegenerative diseases are of critical concern to the general population and research/medical community due to their health impact and socioeconomic consequences. A feature of most, if not all, neurodegenerative disorders is the presence of proteinopathies, in which misfolded or conformationally altered proteins drive disease progression and are often used as a primary neuropathological marker of disease. In particular, Alzheimer's disease (AD) is characterized by abnormal accumulation of protein aggregates, primarily extracellular plaques composed of the Aβ peptide and intracellular tangles comprised of the tau protein, both of which may indicate a primary defect in protein clearance. Protein degradation is a key cellular mechanism for protein homeostasis and is essential for cell survival but is disrupted in neurodegenerative diseases. Dysregulation in proteolytic pathways - mainly the autophagic-lysosomal system (A-LS) and the ubiquitin-proteasome system (UPS) - has been increasingly associated with proteinopathies in neurodegenerative diseases. Here we review the role of dysfunctional autophagy underlying AD-related proteinopathy and discuss how to model this aspect of disease, as well as summarize recent advances in translational strategies for targeted A-LS dysfunction in AD.
- Published
- 2019
- Full Text
- View/download PDF
24. Molecular characterization of Axenfeld-Rieger spectrum and other anterior segment dysgeneses in a sample of Mexican patients
- Author
-
Miguel Angel Alcántara-Ortigoza, Nancy Hernández-Martínez, Luz María González-Huerta, Ariadna González-del Angel, Sergio A. Cuevas-Covarrubias, and Cristina Villanueva-Mendoza
- Subjects
Male ,0301 basic medicine ,Heterozygote ,Genotype ,PAX6 Transcription Factor ,Mutation, Missense ,Biology ,Young Adult ,03 medical and health sciences ,Dysgenesis ,Anterior Eye Segment ,medicine ,Humans ,Eye Abnormalities ,Anterior segment mesenchymal dysgenesis ,Child ,Mexico ,Molecular Biology ,Genetics (clinical) ,Homeodomain Proteins ,Infant ,Eye Diseases, Hereditary ,Forkhead Transcription Factors ,Anatomy ,medicine.disease ,Sample (graphics) ,Ophthalmology ,030104 developmental biology ,Child, Preschool ,Cytochrome P-450 CYP1B1 ,Pediatrics, Perinatology and Child Health ,Female ,Multiplex Polymerase Chain Reaction ,Transcription Factors - Abstract
Anterior segment dysgenesis (ASD) and Axenfeld-Rieger spectrum (ARS) are mainly due to PITX2 and FOXC1 defects, but it is difficult in some patients to differentiate among PITX2-, FOXC1-, PAX6- and CYP1B1-related disorders. Here, we set out to characterize the pathogenic variants (PV) in PITX2, FOXC1, CYP1B1 and PAX6 in nine unrelated Mexican ARS/ASD patients and in their available affected/unaffected relatives.Automated Sanger sequencing of PITX2, FOXC1, PAX6 and CYP1B1 was performed; those patients without a PV were subsequently analyzed by Multiplex Ligation-dependent Probe Amplification (MLPA) for PITX2, FOXC1 and PAX6. Missense variants were evaluated with the MutPred, Provean, PMUT, SIFT, PolyPhen-2, CUPSAT and HOPE programs.We identified three novel PV in PITX2 (NM_153427.2:c.217GA, c.233TC and c.279del) and two in FOXC1 [NM_001453.2:c.274CT (novel) and c.454TA] in five ARS patients. The previously reported FOXC1 c.367CT or p.(Gln123*) variant was identified in a patient with ASD. The ocular phenotype related to FOXC1 included aniridia, corneal opacity and early onset glaucoma, while an asymmetric ocular phenotype and aniridia were associated with PITX2. No gene rearrangements were documented by MLPA analysis, nor were any PV identified in PAX6 or CYP1B1.Heterozygous PV in the PITX2 and FOXC1 genes accounted for 66% (6/9) of the ARS/ASD cases. The absence of PAX6 or CYP1B1 abnormalities could reflect our small sample size, although their analysis could be justified in ARS/ASD patients that present with congenital glaucoma or aniridia.
- Published
- 2018
- Full Text
- View/download PDF
25. Incidence of Delirium in Critically Ill Cancer Patients
- Author
-
Humberto Guevara-García, Ángel Herrera-Gómez, Silvio A. Ñamendys-Silva, Luis Alejandro Sánchez-Hurtado, Francisco J. García-Guillén, Nancy Hernández-Sánchez, and Mario Del Moral-Armengol
- Subjects
Adult ,Male ,medicine.medical_specialty ,Article Subject ,Critical Illness ,health care facilities, manpower, and services ,medicine.medical_treatment ,Logistic regression ,Severity of Illness Index ,behavioral disciplines and activities ,law.invention ,Cohort Studies ,03 medical and health sciences ,0302 clinical medicine ,Risk Factors ,law ,Neoplasms ,mental disorders ,medicine ,Humans ,Prospective cohort study ,Aged ,Mechanical ventilation ,lcsh:R5-920 ,Septic shock ,business.industry ,Incidence ,Mortality rate ,Incidence (epidemiology) ,Delirium ,030208 emergency & critical care medicine ,Middle Aged ,medicine.disease ,Intensive care unit ,nervous system diseases ,Intensive Care Units ,Anesthesiology and Pain Medicine ,Neurology ,030220 oncology & carcinogenesis ,Emergency medicine ,Female ,medicine.symptom ,lcsh:Medicine (General) ,business ,Research Article - Abstract
Objective. The aim of this study was to estimate the incidence of delirium and its risk factors among critically ill cancer patients in an intensive care unit (ICU). Materials and Methods. This is a prospective cohort study. The Confusion Assessment Method for the Intensive Care Unit (CAM-ICU) was measured daily at morning to diagnose delirium by a physician. Delirium was diagnosed when the daily was positive during a patient’s ICU stay. All patients were followed until they were discharged from the ICU. Using logistic regression, we estimated potential risk factors for developing delirium. The primary outcome was the development of ICU delirium. Results. There were 109 patients included in the study. Patients had a mean age of 48.6 ± 18.07 years, and the main reason for admission to the ICU was septic shock (40.4%). The incidence of delirium was 22.9%. The mortality among all subjects was 15.6%; the mortality rate in patients who developed delirium was 12%. The only variable that had an association with the development of delirium in the ICU was the days of use of mechanical ventilation (OR: 1.06; CI 95%: 0.99–1.13;p=0.07). Conclusion. Delirium is a frequent condition in critically ill cancer patients admitted to the ICU. The duration in days of mechanical ventilation is potential risk factors for developing delirium during an ICU stay. Delirium was not associated with a higher rate of mortality in this group of patients.
- Published
- 2018
- Full Text
- View/download PDF
26. First comprehensive TSC1/TSC2 mutational analysis in Mexican patients with Tuberous Sclerosis Complex reveals numerous novel pathogenic variants
- Author
-
Jorge T. Ayala-Sumuano, Miriam E. Reyna-Fabián, Alfredo Varela-Echavarría, Ariadna González-del Angel, Nancy Hernández-Martínez, Miguel Angel Alcántara-Ortigoza, José A. Velázquez-Aragón, Sergio Enríquez-Flores, and Carlos G. Todd-Quiñones
- Subjects
0301 basic medicine ,Male ,congenital, hereditary, and neonatal diseases and abnormalities ,Genetic testing ,Adolescent ,Genotype ,DNA Mutational Analysis ,lcsh:Medicine ,Germline mosaicism ,Disease ,Biology ,Tuberous Sclerosis Complex 1 Protein ,Article ,03 medical and health sciences ,Exon ,Tuberous sclerosis ,Epilepsy ,Young Adult ,0302 clinical medicine ,Tuberous Sclerosis ,Intellectual Disability ,Tuberous Sclerosis Complex 2 Protein ,medicine ,Genetics ,Humans ,Genetic Predisposition to Disease ,Clinical genetics ,lcsh:Science ,Child ,Gene ,Mexico ,Genetic Association Studies ,Multidisciplinary ,lcsh:R ,Infant ,medicine.disease ,030104 developmental biology ,medicine.anatomical_structure ,Phenotype ,Child, Preschool ,Mutation ,lcsh:Q ,Female ,TSC1 ,TSC2 ,030217 neurology & neurosurgery - Abstract
The aim of this study was to improve knowledge of the mutational spectrum causing tuberous sclerosis complex (TSC) in a sample of Mexican patients, given the limited information available regarding this disease in Mexico and Latin America. Four different molecular techniques were implemented to identify from single nucleotide variants to large rearrangements in the TSC1 and TSC2 genes of 66 unrelated Mexican-descent patients that clinically fulfilled the criteria for a definitive TSC diagnosis. The mutation detection rate was 94%, TSC2 pathogenic variants (PV) prevailed over TSC1 PV (77% vs. 23%) and a recurrent mutation site (hotspot) was observed in TSC1 exon 15. Interestingly, 40% of the identified mutations had not been previously reported. The wide range of novels PV made it difficult to establish any genotype-phenotype correlation, but most of the PV conditioned neurological involvement (intellectual disability and epilepsy). Our 3D protein modeling of two variants classified as likely pathogenic demonstrated that they could alter the structure and function of the hamartin (TSC1) or tuberin (TSC2) proteins. Molecular analyses of parents and first-degree affected family members of the index cases enabled us to distinguish familial (18%) from sporadic (82%) cases and to identify one case of apparent gonadal mosaicism.
- Published
- 2019
27. The Conquest in Cultural Memory
- Author
-
Leslie Nancy Hernández Nova
- Subjects
History ,Ancient history ,Cultural memory ,CONQUEST - Published
- 2019
- Full Text
- View/download PDF
28. TSC2/PKD1 contiguous gene syndrome, with emphasis on a case with an atypical mild polycystic kidney phenotype and a novel genetic variant
- Author
-
Jaime Berumen, Gilberto Gómez-Garza, Miguel Angel Alcántara-Ortigoza, Ariadna González-del Angel, Miriam E. Reyna-Fabián, Raquel Jiménez-García, and Nancy Hernández-Martínez
- Subjects
0301 basic medicine ,Male ,Pathology ,medicine.medical_specialty ,TRPP Cation Channels ,Adolescent ,030232 urology & nephrology ,lcsh:RC870-923 ,Contiguous gene syndrome ,Gene dosage ,03 medical and health sciences ,Tuberous sclerosis ,0302 clinical medicine ,Tuberous Sclerosis ,Gene duplication ,Tuberous Sclerosis Complex 2 Protein ,medicine ,Polycystic kidney disease ,Humans ,Cyst ,Child ,Polycystic Kidney Diseases ,PKD1 ,business.industry ,Genetic heterogeneity ,Genetic Variation ,Infant ,Exons ,Syndrome ,lcsh:Diseases of the genitourinary system. Urology ,medicine.disease ,030104 developmental biology ,Phenotype ,Nephrology ,Child, Preschool ,Female ,business ,Gene Deletion - Abstract
About 80% of patients with tuberous sclerosis complex (TSC) present renal involvement, usually as angiomyolipomas followed by cystic disease. An early diagnosis of polycystic kidney disease (PKD) in such patients is frequently related to the TSC2/PKD1 contiguous gene syndrome (PKDTS). Molecular confirmation of PKDTS is important for a prompt diagnosis, which can be complicated by the phenotypic heterogeneity of PKD and the absence of a clear phenotype–genotype correlation. Herein, we report three PKDTS pediatric patients. The case 3 did not present a classic PKDTS phenotype, having only one observable cyst on renal ultrasound at age 4 and multiple small cysts on magnetic resonance imaging at age 15. In this patient, chromosomal microarray analysis showed a gross deletion of 230.8 kb that involved TSC2, PKD1 and 13 other protein-coding genes, plus a heterozygous duplication of a previously undescribed copy number variant of 242.9 kb that involved six protein-coding genes, including SSTR5, in the 16p13.3 region. Given the observations that the case 3 presented the mildest renal phenotype, harbored three copies of SSTR5, and the reported inhibition of cystogenesis (specially in liver) observed with somatostatin analogs in some patients with autosomal dominant PKD, it can be hypothesized that other genetic factors as the gene dosage of SSTR5 may influence the PKD phenotype and the progression of the disease; however, future work is needed to examine this possibility. Resumen: Un 80% de los pacientes con complejo de esclerosis tuberosa (CET) presentan afectación renal, generalmente angiomiolipomas, seguidos de enfermedad quística. Un diagnóstico temprano de la enfermedad renal poliquística (ERP) en estos pacientes se relaciona con frecuencia con el síndrome de genes contiguos TSC2/PKD1 (PKDTS). La confirmación molecular de PKDTS es importante para establecer un diagnóstico oportuno, que puede complicarse por la heterogeneidad fenotípica de PKD y la ausencia de una clara correlación entre fenotipo y genotipo. En este artículo presentamos los casos de 3 pacientes pediátricos con PKDTS. El caso 3 no presentó un fenotipo PKDTS clásico, con solo un quiste observable en la ecografía renal a los 4 años y numerosos quistes pequeños en la resonancia magnética a los 15 años. En este paciente, el análisis de microarreglos para análisis cromosómico global mostró una eliminación total de 230,8 kb que involucró a TSC2, PKD1 y otros 13 genes codificantes de proteínas, más una duplicación heterocigota para una variante de número de copias no descrita previamente de 242,9 kb que involucró a 6 genes codificantes de proteínas, entre ellos SSTR5, en la región 16p13.3. Dado que el caso 3 mostraba el fenotipo renal menos severo, contaba con tres copias del gen SSTR5 y a que se ha observado una inhibición en la cistogénesis (especialmente en el hígado) con los análogos de somatostatina en algunos pacientes con ERP autosómica dominante, podemos hipotetizar que existen otros factores genéticos como la dosis génica de SSTR5 que pudieran influir en el fenotipo y la progresión de la ERP; sin embargo, se necesitan estudios adicionales para investigar esta posibilidad. Keywords: Tuberous sclerosis complex, Polycystic kidney disease, Copy number variant, TSC2/PKD1 contiguous gene syndrome, SSTR5 gene, Palabras clave: Complejo de esclerosis tuberosa, Enfermedad del riñón poliquístico, Variante del número de copias, Síndrome de genes contiguos TSC2/PKD1, Gen SSTR5
- Published
- 2018
29. Cross-sectional study of rapid tapering of opioid prescriptions following medical regulatory intervention in Alberta from 2013 to 2020
- Author
-
Nicole Allison Kain, Nigel Ashworth, Fizza Gilani, Nancy Hernandez-Ceron, and Iryna Hurava
- Subjects
Medicine - Abstract
Objective To determine if inappropriate tapering/discontinuation of opioids to Alberta patients occurred from mid-2013–2020, as unintended consequences of prescribing guidelines, regulations and policies in response to the North American opioid crisis.Design A population-based, repeated cross-sectional time-series study.Setting Alberta, Canada.Participants Residents of Alberta, Canada aged 18 and older who received an opioid dispense from a community pharmacy from 2013 to 2020.Main outcome measures The prevalence of potential rapid tapering was measured at a given date (reference day), enveloped by a data window. Dose changes were measured as oral morphine equivalents (OME) per patient, at multiple time points (‘data window’ around a reference day). Chronic recipients were identified, and their prescriptions were contrasted 90 days before and after the reference day to measure OME/day changes.Results Approximately 9000 dispenses (totalling ~6 million OME) per day were analysed from 2013 to 2020. The total number of opioid recipients was highly cyclic in nature (peaking in winter). The number of chronic opioid recipients remained somewhat stable from ~70K in 2013 to ~86K at the end of 2020. The number of chronic high and very high dose recipients presented a significant decrease after 2017. Approximately 11%–12% of chronic high-dose recipients experienced potential rapid dose tapering at a rate of 50% or more prereference to postreference day at any given point of time. For chronic very high dose recipients, approximately 11.5% experience potential rapid dose tapering at a rate of 50% or more prereference to postreference day at any given point of time. Potential discontinuation remained constant and the interventions did not have a significant impact on the trend.Conclusion The evidence suggests that changes in prescribing guidelines were not associated with an increase of rapid opioid tapering/discontinuation in Alberta.
- Published
- 2023
- Full Text
- View/download PDF
30. Caracterización leucocitaria del pez amazónico Pterophyllum scalare (Lichtenstein, 1823) (Perciformes: Cichlidae) de Perú
- Author
-
María Díaz, José Iannacone, Nancy Hernández, and Cinthya Bello
- Subjects
parámetros hematológicos ,leucocitos ,Pterophyllum scalare ,Amazonía ,General Earth and Planetary Sciences ,General Environmental Science - Abstract
La Ictiohematología es una herramienta de uso común con fines clínicos en peces de importancia económica, con un menor aporte en la comprensión de la fisiología del organismo en relación con su medio. En este contexto y frente a la escasa información publicada en el Perú de aspectos hematológicos de osteictios, se propuso caracterizar los leucocitos del pez angel Pterophyllum scalare (Lichtenstein, 1823) y determinar los valores de referencia cuantitativos. Este pez amazónico exportado como ornamental fue obtenido de un acuario de Lima-Perú. La extracción de la sangre, se llevó a cabo por el método de punción cardiaca, realizándose luego extensiones teñidas con Giemsa y con Wright, y se procedió a realizar el recuento leucocitario. Se relacionaron los parámetros biométricos [longitud estándar (mm), longitud total (mm) y peso (g)] con su caracterización leucocitaria. Los leucocitos, en general, presentaron características similares a las descritas para otros peces. Cuantitativamente, se encontró la siguiente secuencia: linfocitos (61,6%)> monocitos (30,1%)> neutrófilos (4,0%)> eosinófilos (2,1%)> basófilos (1,8%). Los parámetros hematológicos obtenidos son un aporte al conocimiento de esta especie y servirán como base comparativa en futuras aplicaciones.
- Published
- 2017
31. Sustainable tobacco productions starting from the environmental education
- Author
-
Nancy Hernández Almanza, Guillermo Quintana Vara, and Armando Boullosa Torrecilla
- Subjects
EDUCACIÓN AMBIENTAL ,EXTENSIÓN AGRÍCOLA, TABACO ,lcsh:H1-99 ,CAPACITACIÓN ,lcsh:Social sciences (General) ,lcsh:Science (General) ,lcsh:Q1-390 - Abstract
The tobacco is criticized by its negative incidence in the human health, although it understands each other the importance it has for the economy of the country and for the consumer's preferences, because of it, it is not suspend from the national production but we are conscious of the necessity to develop a less aggressive product to the environment. It was carried out an investigation in the central region of Cuba, in the period of the 2002-2009, with the purpose of promoting the environmental education in the tobacco sector, by means of the training and the agricultural extension, to contribute to obtain the sustainable productions. Theoretical and empiric methods were used, with them a diagnosis of the learning necessities was obtained on the topic and a program of pertinent training was applied through the agricultural extension. The obtained results indicated advances in the environmental education that were evidenced in the academic preparation of the professionals, the participation in events and development of projects referred to the environmental topic. Also the technical attendance to producers, the introduction and extension of scientific achievements, they propitiated the application of agroecological practices in the tobacco production with the purpose of obtaining high yield and quality with less noxious effects to the environment.
- Published
- 2014
32. A structural homology approach to identify potential cross-reactive antibody responses following SARS-CoV-2 infection
- Author
-
Joseph R. McGill, H. A. Daniel Lagassé, Nancy Hernandez, Louis Hopkins, Wojciech Jankowski, Quinn McCormick, Vijaya Simhadri, Basil Golding, and Zuben E. Sauna
- Subjects
Medicine ,Science - Abstract
Abstract The emergence of the novel SARS-CoV-2 virus is the most important public-health issue of our time. Understanding the diverse clinical presentations of the ensuing disease, COVID-19, remains a critical unmet need. Here we present a comprehensive listing of the diverse clinical indications associated with COVID-19. We explore the theory that anti-SARS-CoV-2 antibodies could cross-react with endogenous human proteins driving some of the pathologies associated with COVID-19. We describe a novel computational approach to estimate structural homology between SARS-CoV-2 proteins and human proteins. Antibodies are more likely to interrogate 3D-structural epitopes than continuous linear epitopes. This computational workflow identified 346 human proteins containing a domain with high structural homology to a SARS-CoV-2 Wuhan strain protein. Of these, 102 proteins exhibit functions that could contribute to COVID-19 clinical pathologies. We present a testable hypothesis to delineate unexplained clinical observations vis-à-vis COVID-19 and a tool to evaluate the safety-risk profile of potential COVID-19 therapies.
- Published
- 2022
- Full Text
- View/download PDF
33. Tissue-specific induction of the carcinogen-inducible cytochrome P450 isoforms in the gastrointestinal tract
- Author
-
V Dorado-González, Araceli Vences-Mejía, Jesús Javier Espinosa-Aguirre, Norma Labra-Ruiz, Josefina Gómez-Garduño, Nancy Hernández-Martínez, and Heriberto Caballero-Ortega
- Subjects
Pharmacology ,Gastrointestinal tract ,biology ,Health, Toxicology and Mutagenesis ,Stomach ,Cytochrome P450 ,General Medicine ,respiratory system ,Toxicology ,Isozyme ,medicine.anatomical_structure ,medicine ,biology.protein ,Duodenum ,Microsome ,heterocyclic compounds ,Phenobarbital ,Carcinogen ,medicine.drug - Abstract
Gastrointestinal tissues are directly exposed to dietary xenobiotics. In spite of this, modulation of cytochrome P450 (CYP) enzymes in the gastrointestinal tract is not well established. CYP induction could facilitate transformation of chemical agents to potentially toxic or carcinogenic metabolites. This might also determine drug efficacy, burden of foreign chemicals on tissues or bioavailability of certain therapeutic agents. In order to assess the induction of the CYP subfamilies 1A1/2, 2B1/2, 2E1 and 3A2 in the gastrointestinal tract, male Wistar rats were treated with phenobarbital/β-naphthoflavone (PB/NF), cyclohexanol/albendazole (CH/ABZ) or toluene (TL). Microsomal fractions were prepared from tissue samples of the esophagus, the stomach, the duodenum, the colon and the liver. Western blot and enzymatic activity analyses revealed an increase in the expression and activity of CYP1A1/2 and CYP3A2 isoenzymes in the esophageal, duodenal and colonic microsomes from animals treated with PB/NF. CYP1A1/2 and CYP3A2 were induced in hepatic and duodenum microsomes by treatment with CH/ABZ. Our results demonstrate differential induction of CYP along the gastrointestinal tract by known CYP hepatic inducers, being the treatment with PB/NF the best induction system of the CYPs.
- Published
- 2007
- Full Text
- View/download PDF
34. Molecular analysis of the PAX8 gene in a sample of Mexican patients with primary congenital hypothyroidism: identification of the recurrent p.Arg31His mutation
- Author
-
Miguel Angel Alcántara-Ortigoza, Ariadna González-del Angel, Víctor Martínez-Cruz, Marcela Vela-Amieva, Carmen Sánchez-Pérez, Rosario Moreno-Rojas, Bernardette Estandía-Ortega, and Nancy Hernández-Martínez
- Subjects
medicine.medical_specialty ,Endocrinology, Diabetes and Metabolism ,Biology ,Infant newborn ,Molecular biology ,Exon ,Endocrinology ,Internal medicine ,Recien nacido ,Mutation (genetic algorithm) ,Genotype ,medicine ,Base sequence - Published
- 2011
- Full Text
- View/download PDF
35. Geografías emotivas y culturales de un artista peruano inmigrado en Europa
- Author
-
Leslie Nancy Hernández Nova
- Subjects
Europe ,Amazonian shipiba cosmography ,lcsh:French literature - Italian literature - Spanish literature - Portuguese literature ,lcsh:PQ1-3999 ,cultural fragments ,lcsh:H1-99 ,memoria visual, migración, Europa, fragmentos culturales, cosmovisión amazónica shipiba ,lcsh:Social sciences (General) ,visual memory ,migration - Abstract
En este ensayo me propongo ilustrar múltiples posibilidades de lectura de la historia de vida del artista peruano de orígenes italianos, Juan Orsi a través de su narración, obra y mapa personal esbozado por él durante nuestra entrevista para analizar: la transmisión de un ‘deber migratorio’ que recibe del bisabuelo italiano llegado a Perú, la geografía emotiva que enlaza Europa con su tierra de origen y la cosmovisión amazónica shipiba descrita como el lenguaje plástico que permite al artista y al migrante de crear un canal de comunicación con la constelación cultural en la cual toma forma su sentido de pertenencia múltiple, un diálogo íntimo entre varios orígenes., Confluenze. Rivista di Studi Iberoamericani, Vol 5, N° 2 (2013): Migrazioni, autobiografia e memoria: le dinamiche del racconto
- Published
- 2014
- Full Text
- View/download PDF
36. Electrodeposition of silver on a poly(o-aminophenol) modified platinum electrode
- Author
-
Reynaldo Ortiz, Marisela Choy, Jose M. Ortega, and Nancy Hernández
- Subjects
General Chemical Engineering ,Nucleation ,Mineralogy ,chemistry.chemical_element ,engineering.material ,Chronoamperometry ,Electrochemistry ,Analytical Chemistry ,law.invention ,chemistry ,Chemical engineering ,law ,Electrode ,engineering ,Noble metal ,Crystallization ,Cyclic voltammetry ,Platinum - Abstract
Electrodeposition of silver on a poly( o -aminophenol) (POAP) modified platinum electrode was studied by using cyclic voltammetry and chronoamperometry techniques. Results suggest that this process occurs at the polymer ∣ electrode interface. The polymer film is rather indifferent to the electrodeposition of silver because of the low conductivity of the film at potentials where crystallization occurs. Experimental transients indicated that at very short times the process follows a three-dimensional and progressive nucleation pattern with diffusion controlled growth. At pH 5, the formation of silver-polymer amino-complexes may take place.
- Published
- 2001
- Full Text
- View/download PDF
37. Immunotoxic damage in floriculturists exposed to pesticide mixtures
- Author
-
Isela Álvarez-González, Nancy Hernández-Caballero, Eduardo Ramírez-San Juan, Eduardo Madrigal-Bujaidar, Julieta Castillo-Cadena, and Ana Laura González-Mercado
- Subjects
Adult ,Male ,Mitotic index ,Lymphocyte ,T-Lymphocytes ,Physiology ,Immunoglobulins ,Immunoglobulin E ,Young Adult ,Occupational Exposure ,medicine ,Humans ,Pesticides ,Phytohaemagglutinin ,biology ,Immunotoxins ,General Medicine ,Gardening ,Pesticide ,Middle Aged ,Pollution ,medicine.anatomical_structure ,Reference values ,Immune System ,Immunology ,biology.protein ,Workforce ,Female ,Hemoglobin ,Antibody ,Food Science - Abstract
The aim of the present work was to determine if the use of pesticide mixtures produced alterations in immunotoxicity biomarkers. The study was undertaken in three groups: the first group consisted of 38 floriculturists, the second comprised 38 vendors of the local market, and the last comprised 33 non-exposed persons from another locality. The determinations included haematocrit, mean cellular volume, hemoglobin, number of erythrocytes and leukocytes, immunoglobulins (IgA, IgG, IgM, and IgE), percentage of T-lymphocytes, and mitotic index from lymphocyte cultures with and without phytohaemagglutinin (PHA). The obtained results indicated the following: (i) in the level of the studied immunoglobulins, the results were within the reference values; (ii) there was a reduction in the amount of T-lymphocytes in the floriculturists in comparison with the determined in the other two groups; (iii) there was a decrease in the mitotic index of PHA-stimulated lymphocyte cultures of floriculturists and vendors in relation to the value of the control group; (iv) there was an increase in the mitotic index of unstimulated lymphocytes of floriculturists compared with the lymphocytes of the other two groups; and (v) there was no correlation between the results and the personal characteristics of the studied individuals. Our results established an immunotoxic effect in the floriculturists exposed to pesticides.
- Published
- 2012
38. De hija a madre. La negociación de la identidad de género en una historia de migración desde Perú hacia Europa
- Author
-
Leslie Nancy Hernández Nova
- Subjects
mappa mentale ,memoria ,identità di genere transnazionale ,relazioni di genere ,esperienza migratoria ,intersoggettività ,Europa - Published
- 2011
- Full Text
- View/download PDF
39. Protocol to identify host-viral protein interactions between coagulation-related proteins and their genetic variants with SARS-CoV-2 proteins
- Author
-
David D. Holcomb, Katarzyna I. Jankowska, Nancy Hernandez, Kyle Laurie, Jacob Kames, Nobuko Hamasaki-Katagiri, Anton A. Komar, Michael DiCuccio, and Chava Kimchi-Sarfaty
- Subjects
Bioinformatics ,Health sciences ,Genetics ,Molecular biology ,Computer sciences ,Science (General) ,Q1-390 - Abstract
Summary: Here, we describe a bioinformatics pipeline that evaluates the interactions between coagulation-related proteins and genetic variants with SARS-CoV-2 proteins. This pipeline searches for host proteins that may bind to viral protein and identifies and scores the protein genetic variants to predict the disease pathogenesis in specific subpopulations. Additionally, it is able to find structurally similar motifs and identify potential binding sites within the host-viral protein complexes to unveil viral impact on regulated biological processes and/or host-protein impact on viral invasion or reproduction.For complete details on the use and execution of this protocol, please refer to Holcomb et al. (2021). : Publisher’s note: Undertaking any experimental protocol requires adherence to local institutional guidelines for laboratory safety and ethics.
- Published
- 2022
- Full Text
- View/download PDF
40. Phenotype-Genotype Discrepancy Due to a 5.5-kb Deletion in the GALT Gene
- Author
-
Nancy Hernández-Martínez, José A. Velázquez-Aragón, Marcela Vela-Amieva, Ariadna González-del Angel, and Miguel Angel Alcántara-Ortigoza
- Subjects
Genetics ,Mutation ,Galactosemia ,Biology ,medicine.disease ,Compound heterozygosity ,medicine.disease_cause ,Biochemical phenotype ,Article ,Inborn error of metabolism ,Genotype ,medicine ,Allele ,Gene - Abstract
Classical galactosemia is an autosomal recessive inborn error of metabolism caused by a deficiency of the galactose-1-phosphate uridyltransferase (GALT). More than 200 mutations have been described in the GALT gene. A 5.5-kb GALT deletion, first described in patients of Ashkenazi Jewish ancestry, may lead either to an erroneous genotype assignment of classical galactosemia or to discrepancies with parental genotypes and the expected biochemical phenotype. The presence of the 5.5-kb deletion was examined in 27 Mexican nonrelated families with at least one child with reduced GALT activity in erythrocytes and it was detected in the 5.5% (n=3) of the 54 alleles tested. The first molecular studies in three of our families showed that the genotypes of the parents were inconsistent with those of their children, which were considered initially as homozygous p.N314D-Duarte 2, but after analyzing for the presence of the 5.5-kb deletion, were reassigned as compound heterozygotes [5.5-kb deletion]+[p.N314D-Duarte 2]. Identification of the 5.5-kb deletion in Mexican patients suggests that this mutation might not be exclusive to a given ethnic group and should be tested in other populations, especially when there is a discrepancy between the genotypes of patients and parents or by incongruence between biochemical phenotype and GALT genotype. Establishing a genotype–phenotype correlation for the 5.5-kb GALT deletion and determining the appropriate management will require additional studies in patients with a G/G genotype bearing the 5.5-kb GALT deletion.
- Published
- 2010
41. Reducing prescribing of benzodiazepines in older adults: a comparison of four physician-focused interventions by a medical regulatory authority
- Author
-
Nigel Ashworth, Nicole Kain, Delaney Wiebe, Nancy Hernandez-Ceron, Ed Jess, and Karen Mazurek
- Subjects
Benzodiazepines ,Prescribing ,Physicians ,Interventions ,Medicine (General) ,R5-920 - Abstract
Abstract Background The inappropriate and/or high prescribing of benzodiazepine and ‘Z’ drugs (BDZ +) is a major health concern. The purpose of this study was to determine whether physician or pharmacist led interventions or a simple letter or a personalized prescribing report from a medical regulatory authority (MRA) was the most effective intervention for reducing BDZ + prescribing by physicians to patients 65 years of age or older. Methods This was a four-armed, one year, blinded, randomized, parallel-group, investigational trial in Alberta, Canada. Participants were fully licensed physicians (n = 272) who had prescribed 4 times the defined daily dose (4 + DDD) or more of any BDZ + to an older patient at least once in the 3rd quarter of 2016. All physician-participants were sent a personalized prescribing profile by the MRA. They were then randomized into four groups that received either nothing more, an additional personal warning letter from the MRA, a personal phone call from an MRA pharmacist or a personal phone call from an MRA physician. The main outcomes were prescribing behavior change of physicians at one year in terms of: change in mean number of older patients receiving 4 + DDD BDZ + and mean dose BDZ + prescribed per physician. To adjust for multiple statistical testing, we used MANCOVA to test both main outcome measures simultaneously by group whilst controlling for any baseline differences. Results All groups experienced a significant fall in the total number of older patients receiving 4 + DDD of BDZ + by about 50% (range 43–54%) per physician at one year, and a fall in the mean dose of BDZ + prescribed of about 13% (range 10–16%). However, there was no significant difference between each group. Conclusions A personalized prescribing report alone sent from the MRA appears to be an effective intervention for reducing very high levels of BDZ + prescribing in older patients. Additional interventions by a pharmacist or physician did not result in additional benefit. The intervention needs to be tested further on a more general population of physicians, prescribing less extreme doses of BDZ + and that looks at more clinical and healthcare utilization outcomes.
- Published
- 2021
- Full Text
- View/download PDF
42. De hija a madre. La negociación de la identidad de género en una historia de migración desde Perú hacia Europa
- Author
-
Nova, Leslie Nancy Hernández, primary
- Published
- 2011
- Full Text
- View/download PDF
43. Gene variants of coagulation related proteins that interact with SARS-CoV-2.
- Author
-
David Holcomb, Aikaterini Alexaki, Nancy Hernandez, Ryan Hunt, Kyle Laurie, Jacob Kames, Nobuko Hamasaki-Katagiri, Anton A Komar, Michael DiCuccio, and Chava Kimchi-Sarfaty
- Subjects
Biology (General) ,QH301-705.5 - Abstract
Thrombosis is a recognized complication of Coronavirus disease of 2019 (COVID-19) and is often associated with poor prognosis. There is a well-recognized link between coagulation and inflammation, however, the extent of thrombotic events associated with COVID-19 warrants further investigation. Poly(A) Binding Protein Cytoplasmic 4 (PABPC4), Serine/Cysteine Proteinase Inhibitor Clade G Member 1 (SERPING1) and Vitamin K epOxide Reductase Complex subunit 1 (VKORC1), which are all proteins linked to coagulation, have been shown to interact with SARS proteins. We computationally examined the interaction of these with SARS-CoV-2 proteins and, in the case of VKORC1, we describe its binding to ORF7a in detail. We examined the occurrence of variants of each of these proteins across populations and interrogated their potential contribution to COVID-19 severity. Potential mechanisms, by which some of these variants may contribute to disease, are proposed. Some of these variants are prevalent in minority groups that are disproportionally affected by severe COVID-19. Therefore, we are proposing that further investigation around these variants may lead to better understanding of disease pathogenesis in minority groups and more informed therapeutic approaches.
- Published
- 2021
- Full Text
- View/download PDF
44. Efectividad de la crema de Aloe vera en pacientes con psoriasis vulgar de la Parroquia San Fernando.
- Author
-
Ruiz, Yoisel Belen, León, Nancy Hernández, Pereira Despaigne, C. Olga Lidia, Palay Despaigne, Maricela Silvia, and Neyra Barrios, Rafael M.
- Abstract
A therapeutic intervention study of 20 patients with vulgar psoriasis, belonging to San Fernando Parish, in Montes, Sucre State (Venezuela), was carried out from May to December, 2013 who were randomly selected and assigned in 2 groups of identical quantity of members: a control group which used conventional medication with triamcinolone, and the study group which received topical treatment with Aloe vera cream (sabila) with inert base; in order to determine the effectiveness of the last one. To establish the comparison between both groups, non parametrical techniques were used due to the reduced number of patients, and a significance level of 0.05 was always considered. It was obtained that the therapeutic modality with sabila cream was as effective as the triamcinolone use, but unlike this last drug, it showed no adverse reactions. Thus, it could be concluded that the therapy with Aloe vera is effective to treat patients with vulgar psoriasis. [ABSTRACT FROM AUTHOR]
- Published
- 2014
45. Producciones tabacaleras sostenibles a partir de la educación ambiental.
- Author
-
Almanza, Nancy Hernández, Vara, Guillermo Quintana, and Torrecilla, Armando Boullosa
- Abstract
The tobacco is criticized by its negative incidence in the human health, although it understands each other the importance it has for the economy of the country and for the consumer's preferences, because of it, it is not suspend from the national production but we are conscious of the necessity to develop a less aggressive product to the environment. It was carried out an investigation in the central region of Cuba, in the period of the 2002-2009, with the purpose of promoting the environmental education in the tobacco sector, by means of the training and the agricultural extension, to contribute to obtain the sustainable productions. Theoretical and empiric methods were used, with them a diagnosis of the learning necessities was obtained on the topic and a program of pertinent training was applied through the agricultural extension. The obtained results indicated advances in the environmental education that were evidenced in the academic preparation of the professionals, the participation in events and development of projects referred to the environmental topic. Also the technical attendance to producers, the introduction and extension of scientific achievements, they propitiated the application of agroecological practices in the tobacco production with the purpose of obtaining high yield and quality with less noxious effects to the environment. [ABSTRACT FROM AUTHOR]
- Published
- 2014
46. Fomite-mediated transmission as a sufficient pathway: a comparative analysis across three viral pathogens
- Author
-
Alicia N.M. Kraay, Michael A.L. Hayashi, Nancy Hernandez-Ceron, Ian H. Spicknall, Marisa C. Eisenberg, Rafael Meza, and Joseph N.S. Eisenberg
- Subjects
Environmental Infection Transmission System (EITS) ,Fomite mediated transmission ,SIR epidemic model ,Mathematical model ,Infectious and parasitic diseases ,RC109-216 - Abstract
Abstract Background Fomite mediated transmission can be an important pathway causing significant disease transmission in number of settings such as schools, daycare centers, and long-term care facilities. The importance of these pathways relative to other transmission pathways such as direct person-person or airborne will depend on the characteristics of the particular pathogen and the venue in which transmission occurs. Here we analyze fomite mediated transmission through a comparative analysis across multiple pathogens and venues. Methods We developed and analyzed a compartmental model that explicitly accounts for fomite transmission by including pathogen transfer between hands and surfaces. We consider two sub-types of fomite-mediated transmission: direct fomite (e.g., shedding onto fomites) and hand-fomite (e.g., shedding onto hands and then contacting fomites). We use this model to examine three pathogens with distinct environmental characteristics (influenza, rhinovirus, and norovirus) in four venue types. To parameterize the model for each pathogen we conducted a thorough literature search. Results Based on parameter estimates from the literature the reproductive number ( R0 $\mathcal {R}_{0}$) for the fomite route for rhinovirus and norovirus is greater than 1 in nearly all venues considered, suggesting that this route can sustain transmission. For influenza, on the other hand, R0 $\mathcal {R}_{0}$ for the fomite route is smaller suggesting many conditions in which the pathway may not sustain transmission. Additionally, the direct fomite route is more relevant than the hand-fomite route for influenza and rhinovirus, compared to norovirus. The relative importance of the hand-fomite vs. direct fomite route for norovirus is strongly dependent on the fraction of pathogens initially shed to hands. Sensitivity analysis stresses the need for accurate measurements of environmental inactivation rates, transfer efficiencies, and pathogen shedding. Conclusions Fomite-mediated transmission is an important pathway for the three pathogens examined. The effectiveness of environmental interventions differs significantly both by pathogen and venue. While fomite-based interventions may be able to lower R0 $\mathcal {R}_{0}$ for fomites below 1 and interrupt transmission, rhinovirus and norovirus are so infectious ( R0>>1 $\mathcal {R}_{0}>>1$) that single environmental interventions are unlikely to interrupt fomite transmission for these pathogens.
- Published
- 2018
- Full Text
- View/download PDF
47. La superación postgraduada y el desarrollo individual de los profesionales en el sector tabacalero del territorio central de Cuba.
- Author
-
Almanza, Nancy Hernández and Torrecilla, Armando Boullosa
- Subjects
- *
TOBACCO industry , *TOBACCO products , *CAREER development , *PROFESSIONAL employee training - Abstract
It was carried out an evaluation of the behavior of the postgraduate preparation in ten companies dedicated to the tobacco production in their phases: agricultural, pre-industrial and industrial located in the central territory of Cuba, during the period 2002 at the 2009, with the objective of valuing their contribution to the individual development and the good acting of the professionals in the sector. For they were used it the methods: historical - logical, induction - deduction, analysis-synthesis and systemic that allowed the qualitative valuation of the trajectory of the superación, the reasoning of the particular problem and the generalizations at country level, the analysis of the facts that happen in the process, the elements that conform the system and the relationships among them. Also the direct observation of the preparation process and the interviews to the professionals. As a result it was identified that most of the professionals occupy directive positions and technicians and the received superación it propitiated the individual development, the good acting and positive productive results. Another important result was the progressive and stable increase in actions of the graduate degree modalities, graduate and the academic superación, I didn't seize in the obtaining of scientific degrees. The superación of the professionals contributed to the improvement in the execution of its functions, with the transmission of knowledge and experiences to the tobacco production and in turn to the effect regulator of the activity. [ABSTRACT FROM AUTHOR]
- Published
- 2010
48. La traiettoria migratoria di una famiglia del "pueblo joven" Villa Maria del Triunfo: da Ayacucho alle "barriadas" di Lima, a Torino (1995-2006).
- Author
-
Nova, Leslie Nancy Hernández
- Abstract
This essay examines a life story both from a personal and from a family point of view which allows us to reconstruct the events of the recent Peruvian national history and other phenomena of international character like the present day migration from Peru to Italy. In particular, it permits us to understand how the migratory trends present within the country are the same at work in international migration that in this case has connected the population of Lima's metropolitan area to a city of Northern Italy: Turin. The essay proposes the analytical investigation of a migratory route that develops mostly along the lines of family dynamics. The "active agent" of migration, in our case Natalia, establishes a critical rapport with her own migratory experience. Natalia is inclined not to reduce the years spent as an immigrant to a simple economic formula of family savings; but discovers in it an experience of personal maturation that has brought about a change of mentality, with the acquiring of new values she would like to pass on to her family and her community of origin. [ABSTRACT FROM AUTHOR]
- Published
- 2008
49. Disseminated and Congenital Toxoplasmosis in a Mother and Child With Activated PI3-Kinase δ Syndrome Type 2 (APDS2): Case Report and a Literature Review of Toxoplasma Infections in Primary Immunodeficiencies
- Author
-
Djuro Karanovic, Ian C. Michelow, Anthony R. Hayward, Suk See DeRavin, Ottavia M. Delmonte, Michael E. Grigg, Adam Kerry Dobbs, Julie E. Niemela, Jennifer Stoddard, Zaid Alhinai, Natasha Rybak, Nancy Hernandez, Stefania Pittaluga, Sergio D. Rosenzweig, Gulbu Uzel, and Luigi D. Notarangelo
- Subjects
immunodeficiency ,toxoplasmosis ,APDS2 ,PI3K3R1 ,PI3K ,Immunologic diseases. Allergy ,RC581-607 - Abstract
Phosphoinositide 3-kinase (PI3K) plays an integral role in lymphocyte function. Mutations in PIK3CD and PIK3R1, encoding the PI3K p110δ and p85α subunits, respectively, cause increased PI3K activity and result in immunodeficiency with immune dysregulation. We describe here the first cases of disseminated and congenital toxoplasmosis in a mother and child who share a pathogenic mutation in PIK3R1 and review the mechanisms underlying susceptibility to severe Toxoplasma gondii infection in activated PI3Kδ syndrome (APDS) and in other forms of primary immunodeficiency.
- Published
- 2019
- Full Text
- View/download PDF
50. Análisis de necesidades y justificación para crear un modelo de planeación de la innovación del diseño de nuevos productos
- Author
-
Jaime Garnica González, Nancy Hernández Hernández, and Heriberto Niccolas Morales
- Subjects
lcsh:Commerce ,lcsh:HF1-6182 ,HF1-6182 ,HF5001-6182 ,Commerce ,Business ,lcsh:Business ,lcsh:HF5001-6182 - Abstract
Esta investigación descriptiva tiene el propósito de mostrar el análisis de diversas técnicas, métodos y metodologías utilizadas en el diseño de nuevos productos con el objeto de plantear los argumentos que debe contener un modelo de planeación para la innovación de productos. Se realizó la localización de documentos clave, fijación de datos, análisis de contenido, clasificación y síntesis de la información, obteniendo como resultado una clasificación de las técnicas, métodos o metodologías de acuerdo a diversas áreas de análisis. Esta clasificación también indica el propósito que tienen al aplicarlas. El resultado del estudio es la discusión e implicaciones de las técnicas, métodos y metodologías identificadas en la literatura, enfatizado que en la construcción de un modelo de planeación de la innovación del diseño de productos debe hacerse explicita la relación de los diferentes planos de la planeación, como son: el normativo, estratégico, táctico, operacional y la planeación de recursos.
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.