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1.
Rev. patol. respir ; 16(3): 86-90, sept. 2013. tab, graf
Article in Spanish | IBECS | ID: ibc-117905

ABSTRACT

Objetivo: La pseudouridina medida en orina se encuentra elevada en pacientes con patología respiratoria, pretendemos conocer su significado en relación a la masa y fuerza muscular. Población y métodos: Se estudiaron tres poblaciones de sexo masculino, con edades medias entre 65 y 66 años y similar IMC. Una población sana, otra con bronquitis crónica y la tercera con enfermedad pulmonar obstructiva crónica (EPOC) dividida ésta en EPOC emergente (GOLD 1 y2) y EPOC avanzado (GOLD 3 y 4). Se realizó electromiografía, estudio antropométrico mediante bioimpedancia eléctrica para la medida del índice de masa corporal (IMC), masa libre de grasa y su índice (MLG e IMLG). Se determinó la masa muscular (MM) mediante fórmula de Janssen y la fuerza de contracción del cuádriceps (FCC) mediante sillón ergométrico. La determinación del índice pseudouridina/creatinina (PSU) en orina se realizó mediante cromatografía líquida de alta resolución (HPLC) Resultados: En ninguno de los casos estudiados se evidenció miopatía. No se encontraron relaciones entre los valores del índice PSU con la MM y la MLG o el IMLG. El PSU mostró, en la población con patología, una cifra elevada, independientemente de los valores para FCC. Existieron correlaciones negativas, estadísticamente significativas, entre el índice PSU por unidad de masa muscular con respecto a la FCC. Conclusión: La medida del índice PSU, en orina, es un método apropiado para la detección precoz de la disfunción del catabolismo muscular en EPOC. Su elevación se manifiesta antes que se produzcan alteraciones en la fuerza y/o en la masa muscular y está relacionado con la eficacia muscular (AU)


Objective: It´s know that excretion of pseudouridine, in urine, is elevated in patients with respiratory disease. We try to know their meaning in relation to muscle mass and strength. Population and methods: We studied three populations of males, with mean ages between 65 and 66 years and BMI similarly. A healthy population, one with chronic bronchitis, and third with chronic obstructive pulmonary disease (COPD). Population and methods: The COPD´s population is divided into: emerging COPD, (GOLD 1 and 2) and advanced COPD (GOLD 3 and 4). Electromyography, anthropometric study by bioelectrical impedance for measuring body mass index (BMI), fat free mass and its index (MLG, IMLG), muscle mass (MM) determined by the formula of Janssen, and quadriceps strength (FCC) by ergometric chair, were assesed. Pseudouridine (Psu) urinary excretion (cellular protein breakdown) was performed by high performance liquid chromatography (HPLC) Results: None of the cases studied showed myopathy. No relationship was found between the values of PSU with MM and MLG or IMLG. In the population with disease, the PSU´s values are high, regardless of the values for FCC. There are negative correlations statistically significant between PSU per unit of muscular mass with respect to FCC. Conclusion: The PSU index measurement in urine, is an early and affordable method for the detection of dysfunction in COPD muscle catabolism (AU)


Subject(s)
Humans , Pseudouridine/analysis , Bronchitis, Chronic/physiopathology , Pulmonary Disease, Chronic Obstructive/physiopathology , Muscle Strength/physiology , Creatinine/urine , Chromatography, High Pressure Liquid , Body Mass Index
2.
Gastroenterol Hepatol ; 29(4): 224-30, 2006 Apr.
Article in Spanish | MEDLINE | ID: mdl-16584692

ABSTRACT

BACKGROUND: Determination of the metabolic efficiency of the liver in neoplastic diseases in patients receiving highly toxic drugs is of great practical importance. METHODS: The effect of vinorelbine on the metabolic efficiency of the liver was evaluated by means of phenazone kinetics in rats. The test was compared with a battery of tests routinely used whenever hepatic dysfunction is suspected. RESULTS: Vinorelbine was administered to the rats and the pharmacokinetic parameters of antipyrine were compared with those in control rats. A statistically significant prolongation of the elimination half-life, as well as a decrease in the elimination constant and clearance of antipyrine were found in the rats receiving the anticancer drug in comparison with controls (p < 0.01). Statistically significant correlations were found between the elimination half-life of antipyrine and serum albumin values (p < 0.01) and prothrombin time (p < 0.001). CONCLUSIONS: Determination of antipyrine pharmacokinetics allows early detection of vinorelbine-induced hepatic dysfunction, with a sensitive scale.


Subject(s)
Antineoplastic Agents, Phytogenic/pharmacology , Antipyrine/pharmacokinetics , Microsomes, Liver/drug effects , Microsomes, Liver/metabolism , Vinblastine/analogs & derivatives , Animals , Oxidation-Reduction/drug effects , Rats , Rats, Wistar , Vinblastine/pharmacology , Vinorelbine
3.
Gastroenterol. hepatol. (Ed. impr.) ; 29(4): 224-230, abr. 2006. tab, graf
Article in Es | IBECS | ID: ibc-048269

ABSTRACT

Introducción: Conocer la eficacia metabólica del hígado de pacientes en tratamiento con fármacos altamente tóxicos es de gran importancia clínica. Material y métodos: En el presente trabajo se ha evaluado el efecto, en ratas, de la administración de vinorelbina sobre la eficacia metabólica del hígado mediante los parámetros farmacocinéticos de la fenazona. Asimismo se han comparado con pruebas habitualmente utilizadas cuando se sospecha una disfunción hepática. Resultados: Tras la administración de vinorelbina en ratas los parámetros farmacocinéticos de antipirina cambiaron significativamente al compararlos con los de ratas control. En las tratadas con vinorelbina se produjo una prolongación de la vida media de la antipirina, así como una disminución de la constante de eliminación y del aclaramiento, cambios que fueron estadísticamente significativos (p < 0,01). Al mismo tiempo, se hallaron relaciones estadísticamente significativas entre la vida media de la antipirina y las concentraciones de albúmina sérica (p < 0,01), al igual que con el tiempo de protrombina (p < 0,001). Conclusión: La prueba de antipirina permite la detección temprana de disfunción oxidativa, producida por vinorelbina, con una escala sensitiva


Background: Determination of the metabolic efficiency of the liver in neoplastic diseases in patients receiving highly toxic drugs is of great practical importance. Methods: The effect of vinorelbine on the metabolic efficiency of the liver was evaluated by means of phenazone kinetics in rats. The test was compared with a battery of tests routinely used whenever hepatic dysfunction is suspected. Results: Vinorelbine was administered to the rats and the pharmacokinetic parameters of antipyrine were compared with those in control rats. A statistically significant prolongation of the elimination half-life, as well as a decrease in the elimination constant and clearance of antipyrine were found in the rats receiving the anticancer drug in comparison with controls (p < 0.01). Statistically significant correlations were found between the elimination half-life of antipyrine and serum albumin values (p < 0.01) and prothrombin time (p < 0.001). Conclusions: Determination of antipyrine pharmacokinetics allows early detection of vinorelbine-induced hepatic dysfunction, with a sensitive scale


Subject(s)
Rats , Animals , Vinblastine/analogs & derivatives , Antineoplastic Agents, Phytogenic/pharmacology , Antipyrine/pharmacokinetics , Microsomes, Liver/metabolism , Microsomes, Liver , Vinblastine/pharmacology , Oxidation-Reduction
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