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1.
Rev. Fac. Med. Hum ; 23(4): 32-40, oct.-dic. 2023. tab, graf
Artigo em Espanhol | LILACS-Express | LILACS | ID: biblio-1559072

RESUMO

RESUMEN Introducción: La diabetes continúa siendo una de las principales causas de discapacidad y muerte en la población mundial. Alrededor del 25% de las personas con diabetes desarrollarán una úlcera en alguno de sus miembros pélvicos inferiores. Objetivo: El presente estudio evalúa los aspectos clínicos relacionados con la amputación del miembro inferior pélvico en una cohorte de pacientes con diabetes mellitus. Métodos: Estudio retrospectivo, transversal, realizado en colaboración entre el Instituto Mexicano del Seguro Social y la Facultad de Farmacia de la Universidad Autónoma del Estado de Morelos, implicó una revisión de expedientes de pacientes con diabetes mellitus tipo 2 en el Hospital General Regional "Ignacio García Téllez". Se seleccionaron 100 expedientes clínicos y Electrónicos basados en criterios de inclusión, que incluían edad mayor de 18 años, afiliación en el sitio del estudio, evolución de la diabetes de al menos 10 años, tratamiento farmacológico para la diabetes y diagnóstico de pie diabético con curación completa o amputación como resultado. Los análisis estadísticos se realizaron mediante STATA y se obtuvo aprobación ética. Resultados: Los pacientes con un control glucémico óptimo cuantificando sus niveles de glucosa en ayunas (<130 mg/dl) así como sus valores de hemoglobina glicosilada (< 7%) tuvieron una menor frecuencia de amputaciones (p˂0,001; Chi2) en comparación con aquellos pacientes sin un control glucémico adecuado. Conclusión: Se encontró que ser hombre, valores de hemoglobina glucosilada superiores al 7% y valores promedio de glucosa en ayunas superiores a 130 mg/L aumentan la probabilidad de presentar una amputación de extremidad inferior.


ABSTRACT Introduction: Diabetes continues to be a leading cause of disability and death in the world's population. About 25% of people with diabetes will develop an ulcer in one of their lower pelvic limbs. Objective: The present study evaluates the clinical aspects related to lower pelvic limb amputation in a cohort of patients with diabetes mellitus. Lazarte Echegaray Hospital during the period 2017-2020. Methods: Retrospective, cross-sectional study, conducted in collaboration between the Mexican Institute of Social Security and the School of Pharmacy of the Autonomous University of Morelos State, involved a review of records of patients with type 2 diabetes mellitus at the Regional General Hospital "Ignacio García Téllez". One hundred clinical and electronic records were selected based on inclusion criteria, which included age over 18 years, affiliation at the study site, diabetes evolution of at least 10 years, pharmacological treatment for diabetes and diagnosis of diabetic foot with complete healing or amputation as an outcome. Statistical analyses were performed using STATA and ethical approval was obtained. Results: Patients with optimal glycemic control by quantifying their fasting glucose levels (<130 mg/dl) as well as their glycated hemoglobin values (< 7%) had a lower frequency of amputations (p˂0.001; Chi2) compared to those patients without adequate glycemic control. Conclusion: Being male, glycosylated hemoglobin values greater than 7% and mean fasting glucose values greater than 130 mg/L were found to increase the likelihood of having a lower extremity amputation.

2.
Rev. med. vet. (Bogota) ; (44): 47-59, Jan.-June 2022. tab, graf
Artigo em Espanhol | LILACS-Express | LILACS | ID: biblio-1377007

RESUMO

Resumen El sedimento es la capa superficial del fondo en estanques o en lagunas de oxidación. Este se origina fundamentalmente por la deposición de sólidos en suspensión, nutrientes y partículas del suelo que están en contacto con el agua, y que son naturalmente producidos por la operación de las granjas. Su manejo y disposición se constituye actualmente en un imperativo técnico, dadas las implicaciones ambientales que tienen las descargas provenientes de cultivos piscícolas. Se realizó la caracterización general del sedimento en tres sectores de una granja intensiva de producción, afluente, laguna de oxidación y efluente, la cual incluyó cuatro parámetros, que fueron medidos en tres momentos diferentes. Los valores obtenidos fueron comparados mediante análisis de varianza de una vía con α = 0,05 como nivel de significancia. Además, cuando fue necesario se realizó una prueba de Tukey para precisar las diferencias. Aquello cobijó las medidas de fósforo disponible, materia orgánica, carbono orgánico y relación C: N. Las diferencias encontradas entre los sectores son una aproximación al efecto de la producción piscícola sobre la composición de los sedimentos.


Abstract Sediment is the surface layer in the bottom of ponds or oxidation pools. It is created basically due to the deposition of solids in suspension, nutrients, and soil particles that contact the water and are produced naturally in farming operations. Today, the management and arrangement are a must in technical issues due to the environmental implications generated by the discharges coming from fish cultures. The general characterization of the sediment was carried out in three sectors of an intensive production farm, affluent, oxidation pool, and effluent. It included four parameters that were measured in three different time points. Obtained values were compared using one-way variance analysis with α = 0.05 as the significance level. In addition, when necessary, a Tukey test was carried out to pin down the differences. It enabled us to find the measures of available phosphorus, organic matter, organic carbon, and the ratio C: N. the differences found between the sectors are approximate values to the effect of the fish production regarding the sediment composition.

3.
Acta méd. colomb ; 46(2): 42-45, Jan.-June 2021. graf
Artigo em Inglês | LILACS-Express | LILACS | ID: biblio-1349882

RESUMO

Abstract Leiomyosarcoma is an aggressive mesenchymal malignant tumor which rarely presents in head and neck structures. There are few cases published in the literature, and clinical suspicion, diagnosis and early treatment are considered to be essential for dealing with the adverse outcomes derived from its poor prognosis. We report the first case of primary orbital leiomyosarcoma in Colombia, diagnosed in an older adult who consulted due to eight months of progressive growth of the left frontotemporal region along with dysarthria, vision loss and ipsilateral painful proptosis. Imaging studies revealed a large osteolytic lesion involving the orbit and central nervous system. An incisional biopsy was performed, reporting high-grade leiomyosarcoma. Once metastasis was ruled out, complete excision of the lesion was ordered, along with radiation therapy. After 10 months of close follow up, the patient had progressed well, with no local recurrences or distant metastases. (Acta Med Colomb 2021; 46. DOI: https://doi.org/10.36104/amc.2021.1937).


Resumen El leiomiosarcoma es un tumor maligno de origen mesenquimal de naturaleza agresiva que infrecuentemente se presenta en estructuras de cabeza y cuello. Son pocos los casos publicados en la literatura, siendo considerado su sospecha, diagnóstico y tratamiento temprano fundamentales para enfrentar los desenlaces adversos derivados de su mal pronóstico. Se reporta el primer caso en Colombia de leiomiosarcoma primario de órbita, diagnosticado en un paciente adulto mayor quien consultó por ocho meses de aumento progresivo de la zona frontotemporal izquierda acompañado de disartria, pérdida de visión y proptosis dolorosa ipsilateral. Los estudios imagenológicos eviden ciaron extensa lesión osteolítica con compromiso orbitario y de sistema nervioso central. Se realizó biopsia incisional, con reporte de leiomiosarcoma de alto grado. Tras descartar metástasis, se indicó exéresis completa de la lesión e inicio de radioterapia. A los diez meses de estrecho seguimiento, el paciente presentó una evolución favorable sin recurrencias locales ni metástasis a distancia. (Acta Med Colomb 2021; 46. DOI: https://doi.org/10.36104/amc.2021.1937).

4.
Sensors (Basel) ; 19(20)2019 Oct 09.
Artigo em Inglês | MEDLINE | ID: mdl-31601009

RESUMO

Cooperative robotics has considered tasks that are executed frequently, maintaining the shape and orientation of robotic systems when they fulfill a common objective, without taking advantage of the redundancy that the robotic group could present. This paper presents a proposal for controlling a group of terrestrial robots with heterogeneous characteristics, considering primary and secondary tasks thus that the group complies with the following of a path while modifying its shape and orientation at any time. The development of the proposal is achieved through the use of controllers based on linear algebra, propounding a low computational cost and high scalability algorithm. Likewise, the stability of the controller is analyzed to know the required features that have to be met by the control constants, that is, the correct values. Finally, experimental results are shown with different configurations and heterogeneous robots, where the graphics corroborate the expected operation of the proposal.

5.
rev. udca actual. divulg. cient ; 21(2): 587-597, jul.-dic. 2018. tab, graf
Artigo em Espanhol | LILACS-Express | LILACS | ID: biblio-1094760

RESUMO

RESUMEN La subcuenca del Río Teusacá presenta alta actividad urbanística e industrial en, aproximadamente, el 50% de su superficie, lo cual, ha generado vertimientos de aguas residuales al ambiente acuático. El objetivo de este estudio fue caracterizar la calidad del agua, con base en el Índice Biótico de Familias (IBF), en dos sectores (alto y bajo) del río, en dos temporadas (seca y lluviosa) y analizar la correlación del IBF con: COT, fosfatos, sulfatos, nitratos, nitritos e índices de diversidad. Los muestreos, se realizaron con una red Surber (malla 500 micras y 0,09m2 de área), en 10 sitios, distribuidos en el curso principal: en octubre de 2016, al finalizar una temporada seca y en julio de 2017, al terminar una temporada lluviosa. En total, se registraron 35 taxones y los órdenes con más familias fueron: Diptera (28%), Coleoptera (17%) y Hemiptera (11%). El IBF presentó correlación positiva (>76%) con los contaminantes químicos y se observó que los principales contaminantes del río fueron los fosfatos y el COT, mientras que el IBF con los índices de diversidad, no mostró correlación. La calidad del agua en el sector alto del río estuvo entre buena y regular en ambas temporadas, mientras que en el sector bajo estuvo entre malsana y muy nociva. Estos resultados sugieren que en IBF es un buen indicador de la calidad de agua en los ríos.


ABSTRACT The Teusacá River subbasin presents high industrial and urbanization activities in approximately 50% of its surface, which has generated discharges of waste water and pollutants into the aquatic environment. The aim of this study was to characterize the quality of water based on the insect family biotic index (FBI) in two river sectors (low and high) in two seasons (dry and rainy) and to analyze the FBI correlation with: TOC, phosphates sulphates, nitrates, nitrites and diversity indices. Sampling was carried out in October 2016 and in July 2017 at the end of the dry season and the rainy season, repectively, using a Surber net (500 microns and 0.09m2) at 10 sites, distributed along in the main course of the river. A total of 35 taxa were recorded, the groups with more families were: Diptera (28%), Coleoptera (17%) and Hemiptera (11%). The IBF was significantly and positively correlated with chemical pollutants (>76%) and the main pollutants of the River observed were phosphates and the TOC; while the IBF was not correlated with the diversity indices. The water quality in the high river sector was between good and regular in both seasons; while in the lower river sector it was very harmful and unhealthy. The results obtained suggest that the FBI is an appropriate indicator for determining the water quality of the river.

6.
Rev. med. vet. (Bogota) ; (35): 137-147, jul.-dic. 2017. graf
Artigo em Espanhol | LILACS | ID: biblio-902144

RESUMO

Resumen Eremophilus mutisii es una especie nativa, endémica, del altiplano central colombiano, donde tiene un carácter emblemático y con características que permiten inferir algún potencial piscícola. Con el objetivo de avanzar en el conocimiento sobre aspectos relacionados con su reproducción, se adelantó un seguimiento del desarrollo embrionario bajo condiciones controladas de laboratorio. Para ello, ejemplares silvestres y sexualmente maduros fueron inducidos con extracto de hipófisis de carpa, en dosis totales de 5,5 mg kg-1 en hembras y 4,0 mg kg-1 en machos, siguiendo protocolos con respuesta demostrada. La fertilización se realizó en seco y la incubación se adelantó en frascos de vidrio de 3,6 L a 16,15 ± 1,1 °C. Se colectaron muestras cada hora desde ovocélula hasta eclosión, y se establecieron los estadios por medio de observación en estereoscopio y con una descripción también apoyada con material fotográfico. Se trata de huevos esféricos, adherentes, con 1052 ± 60,2 de diámetro, telolecíticos, y con segmentación meroblástica. Para los estadios de cigoto, clivajes, blastomeración, blástula, gástrula, organogénesis y eclosión, la descripción se realiza en 20 momentos clave, referenciados temporalmente en horas posfertilización (HPF), grados hora (grados h-1) y grados día (grados d-1). Comparado con otros bagres nativos, el periodo de desarrollo se considera extenso, con eclosión completa a las 100 HPF (1615 grados h-1; 387,6 grados d-1). Las larvas nacen con una longitud total de 3148 ± 176 m, con un saco vitelino de forma redondeada con un diámetro medio de 0,9 ± 0,08 mm y un volumen de 0,382 mm3.


Abstract Eremophilus mutisii is a native, endemic species of the Colombian central highlands, with an emblematic character and characteristics that allow inferring some fish farming potential. In order to advance our knowledge about aspects related to its reproduction, embryonic development was monitored under controlled laboratory conditions. To this effect, wild and sexually mature specimens were induced with carp pituitary extract, in total doses of 5.5 mg kg-1 in females and 4.0 mg kg-1 in males, following protocols with demonstrated response. Fertilization was performed dry and incubation was carried out in glass vials of 3.6 L at 16.15 ± 1.1 °C. Samples were collected every hour from egg cells to hatching, and stages were established by means of stereoscopic observation and described with supporting photographic material. They are spherical, adherent eggs, with a diameter of 1052 ± 60.2 pn, telolecithal, and with meroblastic segmentation. For the stages of zygote, cleavages, blastocyst formation, blastula, gastrula, organogenesis, and hatching, description was done in 20 key moments, referenced temporarily in post-fertilization hours (PFH), degrees/hour (degrees h-1), and degrees/day (degrees d-1). Compared with other native catfish, the development period is considered extensive, with full hatching at 100 PFH (1615 degrees h-1; 387.6 degrees d-1). The larvae were born with a total length of 3148 ± 176 m, with a rounded yolk sac with a mean diameter of 0.9 ± 0.08 mm and a volume of 0.382 mm3.


Resumo Eremophilus mutisii é uma espécie nativa, endêmica, do altiplano central colombiano, onde têm um caráter emblemático e com características que permitem inferir algum potencial piscícola. Com o objetivo de avançar no conhecimento sobre aspectos relacionados com sua reprodução, fez-se um seguimento do desenvolvimento embrionário sob condições controladas de laboratório. Para isso, exemplares silvestres e sexualmente maduros foram induzidos com extrato de hipófise de carpa, em doses totais de 5,5 mg Kg-1 em Fêmeas e 4,0 mg Kg-1 em machos, seguindo protocolos com resposta demonstrada. A fertilização realizou-se em seco e a incubação foi realizada em frascos de vidro de 3,6 L a 16,15 ± 1,1 °C. coletaram-se amostras cada hora desde ovocélula hasta eclosão, e se estabeleceram os estados por meio de observação em estereoscópio e com uma descrição também apoiada com material fotográfico. Se trata de ovos esféricos, aderentes, com 1052 ± 60,2 de diâmetro, telolécitos, e com segmentação meroblástica. Para os estados de zigoto, clivagens, blastomeração, blástula, gástrula, organogênese e eclosão, a descrição se realiza em 20 momentos chave, referenciados temporariamente em horas pós-fertilização (HPF), graus hora (graus h-1) e graus dia (graus d-1). Comparado com outros bagres nativos, o período de desenvolvimento se considera extenso, com eclosão completa às 100 HPF (1615 graus h-1; 387,6 grados d-1). As larvas nascem com uma longitude total de 3148 ± 176 m, com um saco vitelino de forma arredondada com um diâmetro médio de 0,9 ± 0,08 mm e um volume de 0,382 mm3.

7.
J Pediatr Gastroenterol Nutr ; 64(6): 930-932, 2017 06.
Artigo em Inglês | MEDLINE | ID: mdl-27579694

RESUMO

Rumination syndrome is the effortless regurgitation of recently ingested food with subsequent reswallowing or spitting out. Dental erosion (DE) affects 2% to 5% of the population. DE is defined as loss of tooth structure by a chemical process that does not involve bacteria. Our objective was to compare the frequency of DE among children with rumination syndrome with healthy controls. We enrolled 30 patients 4 to 21 years of age diagnosed with rumination syndrome, and 30 age- and sex-matched healthy control subjects. Patients were evaluated by pediatric dentists for presence of DE with Taji et al a validated grading system. Patients with rumination were more likely to have DE (P < 0.001). Of patients with rumination syndrome, 23 (77%) had DE, compared with 4 (13%) control subjects. DEs are more frequent in patients with rumination syndrome.


Assuntos
Transtornos de Alimentação na Infância/complicações , Erosão Dentária/etiologia , Adolescente , Estudos de Casos e Controles , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Fatores de Risco , Síndrome , Erosão Dentária/epidemiologia , Adulto Jovem
8.
Med. interna (Caracas) ; 31(2): 55-73, 2015. tab
Artigo em Espanhol | LILACS | ID: lil-777833

RESUMO

A pesar de numerosos ensayos clínicos y guías con los que se cuenta para el manejo de enfermedades cardiovasculares, en ocasiones, este material no es contentivo de directrices explícitas que orienten a los sistemas de salud y al médico especialista o general cómo mejorar la etapa de seguimiento en la consulta externa de la patología. Esto muy probablemente es debido a la falta de respaldo de medicina basada en evidencia para emitir recomendaciones que estandaricen y protocolicen el manejo del paciente ambulatorio como es la regla en muchas condiciones médicas. Se han resumido las recomendaciones para el manejo ambulatorio del paciente luego de un episodio de insuficiencia cardíaca aguda (ICA) basadas en la evidencia científica existente. El objetivo es optimizar las directrices para el control y manejo del paciente que egresa del hospital luego de un episodio de ICA, dando respuestas a preguntas frecuentes. Estas recomendaciones deben redundar en un mejor manejo de estos pacientes con la consecuente reducción de re-hospitalizaciones por igual causa y posposición de la muerte, transformando al paciente ya compensado y egresado en otro con insuficiencia cardiaca crónica “estable”.


Despite numerous published clinical trials, guidelines and statements available for the management of cardiovascular diseases, some do not contain explicit content that may orient health systems, the attending specialist or primary care physician on how to improve the control of such conditions on the follow-up in the outpatient clinic. This could probably be due to the lack of support from evidence based medicine to issue recommendations to standardize ambulatory patient management as is the rule with other medical conditions. Recommendations for the ambulatory management of post acute heart failure (AHF) episode patients are summarized based on existing scientific evidence. The goal is to optimize guidelines for the management and control of discharged patients following an episode of AHF providing answers to frequently raised questions. These recommendations should result in better patient management, consequently reducing re-hospitalization, postponing death and transforming an already compensated and discharged patient into another with “stable” chronic heart failure. We are aware that heart failure management is overly critical due to the fact that, since this entity resides at the final stage of the cardiovascular continuum, it may not spike further interest as compared to other cardiovascular syndromes.


Assuntos
Humanos , Masculino , Feminino , Assistência Ambulatorial/métodos , Doenças Cardiovasculares , Documentação , Insuficiência Cardíaca , Pacientes Ambulatoriais , Cardiologia , Medicina Interna
10.
Radiol Case Rep ; 7(2): 620, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-27326279

RESUMO

A 37-year-old female with a large unruptured superior hypophyseal aneurysm underwent a guglielmi detachable-coil embolization after proper diagnostic three-dimensional digital subtraction angiography (DSA) of the internal carotid artery. Only a few case reports exist in the scientific literature about this uncommon entity that accounts for 1% of all intracranial aneurysms. We discuss the etiology, prevalence, and incidence of saccular intracranial aneurysms as well as their risk factors, prognosis, and differential diagnosis. We also review the literature on intracranial aneurysm and evaluate its current diagnostic management and therapeutic treatment.

12.
Acta neurol. colomb ; 26(4): 215-221, oct.-dic. 2010. graf
Artigo em Espanhol | LILACS | ID: lil-573504

RESUMO

El dengue es una de las enfermedades infecciosas reemergentes más frecuentes en países tropicales. En Colombia,se ha evidenciado un particular aumento en la prevalencia de esta enfermedad, cuyas manifestaciones clínicas sepresentan en formas diversas incluyendo afectación del sistema nervioso central (SNC). Se presenta el caso deun paciente con cuadro clínico correspondiente a choque por dengue, en donde los hallazgos por neuroimagenpodrían pertenecer a leucoencefalopatía multifocal no progresiva; se hace también la correlación entre la resonanciamagnética, el electroencefalograma y la evolución clínica del paciente.


Assuntos
Humanos , Dengue , Encefalopatias , Leucoencefalopatias , Neurofisiologia
13.
Am J Cardiovasc Drugs ; 10(3): 143-54, 2010.
Artigo em Inglês | MEDLINE | ID: mdl-20524716

RESUMO

Cardiovascular disease (CVD) is a continuum that begins with the presence of several risk factors for CVD, including smoking, hypertension, obesity, diabetes mellitus, and high levels of cholesterol, and if unaddressed can result in premature death, ischemic heart disease, stroke, congestive heart failure, and end-stage renal disease. Hypertension is associated with a significant increase in cardiovascular (CV) morbidity and mortality, raising the risk of stroke, myocardial infarction, heart failure, kidney disease, and peripheral arterial disease. In Latin America, the prevalence of hypertension and other CV risk factors has become similar to that seen in more developed countries, increasing the proportion of the population at high risk for CVD and congestive heart failure; however, it is hypertension that is a key driving force behind CV risk in Latin America. Despite the existence of a wide range of antihypertensive agents, BP control and reductions in CV risk remain poor in Latin America and in Hispanics living in the US. Ethnic differences in treatment rates and disease awareness have been well documented. Studies have shown that calcium channel blockers (CCBs; calcium channel antagonists) are at least as effective in reducing BP and improving the CV risk profile as other classes of antihypertensive agents when administered as monotherapy. CCBs have also been shown to be effective when administered as part of combination therapy in both low- and high-risk hypertensive patients, suggesting that CCBs can easily be combined with other antihypertensive classes in order to achieve BP control and CV risk reduction. In patients with hypertension, coronary artery disease, and high cholesterol, CCBs have been associated with beneficial effects on a range of other aspects of the CV continuum, including the vasculature, coronary calcification, and progression of atherosclerosis. CCBs have also been shown to preserve renal function. Unlike diuretics and beta-adrenoreceptor antagonists, CCBs are metabolically neutral, inducing minimal changes in serum lipids and decreasing the incidence of new-onset diabetes compared with other antihypertensive agents. CCBs are well tolerated when administered as monotherapy or combination therapy, with long-acting formulations minimizing adverse events even further compared with short-acting formulations. These characteristics make CCBs an attractive option for the treatment of hypertension and CV risk in Latin America, which remain significant health issues in this region.


Assuntos
Bloqueadores dos Canais de Cálcio/uso terapêutico , Doenças Cardiovasculares/prevenção & controle , Hipertensão/tratamento farmacológico , Bloqueadores dos Canais de Cálcio/efeitos adversos , Quimioterapia Combinada , Humanos , Comportamento de Redução do Risco
17.
Av. cardiol ; 15(1): 13-9, feb. 1995.
Artigo em Espanhol | LILACS | ID: lil-163527

RESUMO

En la primera parte de esta revisión, estudiamos las características de los radicales libres, sus fuentes de producción y su presencia en el daño a la membrana celular, en la oxidadciónde la LDL, en la génesis y desarrollo de la aterosclerosis y en el daño post-isquémico y post-reperfusión. En esta segunda parte estudiaremos el papel de los radicales libres en el desarrollo de ciertos cánceres, en la diabetes y en el envejecimiento. Tanto en estos casos, como en todos los procesos patológicos dende están involucrados los radicales libres, si siguen un mismo esquema: ataque a las biomoléculas más importantes de las células afectadas: lípidos, ácidos nucléicos, proteínas y azúcares


Assuntos
Humanos , Envelhecimento/patologia , Antioxidantes/análise , Antioxidantes/uso terapêutico , Diabetes Mellitus/patologia , Radicais Livres , Neoplasias/patologia
18.
Av. cardiol ; 14(5): 73-84, oct. 1994.
Artigo em Espanhol | LILACS | ID: lil-185585

RESUMO

Los radicales libres desempeñan una función muy importante en el metabolismo de los seres vivos; sin embargo si su producción rebasa la capacidad del sistema antioxidante que los regula, pueden producirse daños en la biomoléculas más importantes del organismo: fosfolípidos de membrana, ácidos nucleícos y proteínas, ocasionando trastornos fisiológicos tales como la oxidación de la LDL, daño post-isquémico y post-reperfusión, ciertas formas de cáncer, formación de cataratas, distrofia muscular, artritis reumatoidea, complicaciones de la diabetes y del envejecimiento


Assuntos
Humanos , Masculino , Feminino , Antioxidantes/efeitos adversos , Antioxidantes/uso terapêutico , Radicais Livres/química , Metabolismo/fisiologia
20.
Rev. méd. hondur ; 61(4): 122-6, oct.-dic. 1993. ilus, tab
Artigo em Espanhol | LILACS | ID: lil-135983

RESUMO

La homeostasis del potasio es de vital importancia para el mantenimiento de una gran variedad de funciones celulares. Estudios recientes sugieren que el colon de los mamiferos desempeña un papel importante en el mantenimiento del balance total de este ion. Se conoce que la epinefrina estimula la secreción activa de K+ en el colon, pero todavía no se ha determinado con exactitud cuales son los mecanismos de transporte que son afectados por este agente adrenérgico. En el presente trabajo se demuestra que la epinefrina actua a nivel de la membrana laterobasal de las celulas epiteliales colonicas, incrementando la actividad de la ATPasa de Na-K y del cotransportador Na-K-2Cl


Assuntos
Animais , Cobaias , Canais de Potássio/fisiologia , Epinefrina/efeitos adversos , Potássio/metabolismo
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