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1.
Int J Obes (Lond) ; 39(4): 549-56, 2015 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-25504042

RESUMO

PURPOSE: Increasing evidence exists that maternal obesity (MO) and overnutrition during pregnancy and lactation have long-lasting consequences for progeny metabolism, cardiovascular and endocrine function. Data on effects of MO on offspring reproduction are limited. We hypothesized that MO during pregnancy and lactation in founder F(0) rat mothers would increase testicular and sperm oxidative stress (OS) and adversely impact male fertility in their F(1) offspring. METHODS: We induced pre-pregnancy MO by feeding F(0) females a high-fat diet from weaning through pregnancy and lactation. After weaning, all F(1) rats ate control (C) diet. We determined serum testosterone, malondialdehyde (MDA), reactive oxygen species (ROS) and superoxide dismutase (SOD) and glutathione peroxidase (GPx) activity in F(1) testes and sperm at postnatal days (PNDs) 110, 450 and 650. RESULTS: At PNDs 450 and 650, MO offspring had lower luteinizing hormone while testosterone levels were lower at all ages. Testicular MDA and ROS concentrations and SOD and GPx activity were higher in MO F(1) at all ages. Nitrotyrosine immunostaining was higher at all ages in MO F(1) testes than C F(1). At PNDs 450 and 650, MO F(1) spermatozoa showed higher MDA concentrations and lower SOD and GPx activity with reduced sperm concentration, viability and motility, and more sperm abnormalities. Fertility rate was not affected at PND 110 but was lower in MO F(1) at PNDs 450 and 650. CONCLUSIONS: We conclude that MO during pregnancy and lactation increases F(1) testicular and sperm OS leading to premature aging of reproductive capacity.


Assuntos
Fertilidade , Obesidade/metabolismo , Hipernutrição/metabolismo , Estresse Oxidativo , Complicações na Gravidez/metabolismo , Efeitos Tardios da Exposição Pré-Natal/metabolismo , Fenômenos Fisiológicos da Nutrição Animal , Animais , Animais Recém-Nascidos , Dieta Hiperlipídica , Feminino , Infertilidade/etiologia , Lactação , Masculino , Fenômenos Fisiológicos da Nutrição Materna , Obesidade/complicações , Obesidade/etiologia , Hipernutrição/complicações , Gravidez , Ratos , Ratos Wistar , Fatores Sexuais
2.
An. Fac. Med. (Perú) ; 77(2): 147-152, abr.-jun. 2016. ilus, tab, graf
Artigo em Espanhol | LILACS, LIPECS | ID: biblio-834257

RESUMO

Introducción. Las interferencias analíticas por turbidez pueden causar errores clínicamente significativos en los resultados de unamagnitud biológica. Objetivos. Conocer y cuantificar la posible interferencia producida por la turbidez (lipemia) en la medición rutinariade 24 constituyentes bioquímicos, empleando para ello el criterio de interferencia clínicamente relevante cuando se supera el máximoerror sistemático deseable. Diseño. Estudio experimental con pre y pos-prueba. Institución. Hospital Edgardo Rebagliati Martins, Lima,Perú. Material biológico. Pool de sueros proveniente de muestras procesadas en el laboratorio central del hospital. Intervenciones. Seañadieron cantidades crecientes de una emulsión lipídica comercial de nutrición parenteral a siete diferentes alícuotas de una mezclade sueros y se determinó en ellas, por triplicado, la influencia del interferente en los 24 constituyentes. Para lo cual se ha seguidoel protocolo de la Sociedad Española de Química Clínica. Principales medidas de resultados. Porcentaje relativo de desviaciónde la concentración del constituyente por influencia de la turbidez, con respecto a una muestra sin interferente. Resultados. Losconstituyentes: glucosa, creatinina, potasio, colesterol total, HDL colesterol, fosfatasa alcalina, gammaglutamil transferasa, amilasay lipasa, no presentaron interferencia en todas las alícuotas con cantidades crecientes del interferente empleado en el ensayo. Seobservó interferencia para urea, ácido úrico, proteínas totales, albúmina, bilirrubina total, LDL colesterol, transferrina, fósforo, hierro,láctico deshidrogenasa, aspartato aminotransferasa, alanino aminotransferasa, creatinfosfocinasa, calcio y magnesio. Conclusiones.De los 24 constituyentes estudiados, 15 presentaron interferencia clínicamente significativa. Se recomienda que cada laboratorioinvestigue los efectos de dicha interferencia empleando sus propios métodos, reactivos o instrumentos.


Introduction: The analytical interference due to turbidity may cause clinically significant errors in the results of biological magnitude. Objectives: To identify and quantify turbidity (lipemia) possible interference in the routine measurement of 24 biochemical constituents using clinically relevant interference criterion when the maximum desirable systematic error is exceeded. Design: Experimental study with pre and post-test. Setting: Hospital Edgardo Rebagliati Martins, Lima, Peru. Biological material: Pooled sera from samples processed at the central laboratory of the hospital. Interventions: Increasing amounts of a parenteral nutrition commercial lipid emulsion were added to seven different aliquots of a pool of sera, and the influence of interference in 24 constituents was determined by triplicate. The Spanish Society of Clinical Chemistry guideline was followed. Main outcome measures: Lipemia-influenced constituent concentration relative percent deviation, compared with a sample without interference. Results: The constituents glucose, creatinine, potassium, total cholesterol, HDL cholesterol, alkaline phosphatase, gamma glutamyl transferase, amylase and lipase showed no interference in all aliquots with increasing concentrations of the assay interference. Interference was observed in urea, uric acid, total protein, albumin, total bilirubin, cholesterol LDL, transferrin, phosphorus, iron, lactate dehydrogenase, aspartate aminotransferase, alanine aminotransferase, creatine phosphokinase, calcium and magnesium. Conclusions: Of the 24 constituents studied, 15 had clinically significant interference. It is recommended that each laboratory investigates the effects of this interference using their own methods, reagents and instruments.


Assuntos
Humanos , Doenças Metabólicas , Erros de Diagnóstico , Lipoproteínas , Testes Laboratoriais , Soro
3.
An. Fac. Med. (Perú) ; 76(4): 377-384, oct.-dic.2015. tab, graf
Artigo em Espanhol | LILACS, LIPECS | ID: lil-781106

RESUMO

La interferencia por hemólisis es la principal causa de rechazo preanalítico de muestras de suero en el laboratorio clínico. Objetivos. Conocer y cuantificar la posible interferencia producida por hemólisis en la medición rutinaria de 25 constituyentes bioquímicos en el autoanalizador ADVIA 1800, empleando para ello el criterio de interferencia clínicamente relevante, cuando se supera el máximo error sistemático deseable. Diseño. Estudio descriptivo comparativo. Institución. Hospital Edgardo Rebagliati Martins, EsSalud, Lima, Perú. Material biológico. Muestras sanguíneas proveniente de sujetos voluntarios. Intervenciones. Se añadieron cantidades crecientes de hemoglobina (0,26 g/L, 0,53 g/L, 1,05 g/L, 2,10 g/L, 3,25 g/L, 4,30 g/L y 5,25 g/L) a siete diferentes alícuotas de una mezcla de sueros y se determinó en ellas por duplicado la influencia del interferente en los 25 constituyentes. Se siguió el protocolo de la Sociedad Española de Química Clínica. Principal medida de resultados. Porcentaje relativo de desviación de la concentración del constituyente por influencia de la hemólisis, con respecto a la muestra sin interferente. Resultados. Los constituyentes urea, creatinina, ácido úrico, bilirrubina total, colesterol HDL, colesterol LDL, triglicéridos, calcio y gammaglutamiltransferasa no presentaron interferencia, mientras que se observó interferencia para glucosa, proteínas, albúmina, colesterol, potasio, fósforo, magnesio, deshidrogenasa láctica, creatinfosfoquinasa, aspartato aminotransferasa, alanino aminotransferasa, lipasa, sodio, cloro, fosfatasa alcalina y amilasa. Conclusiones. De los 25 constituyentes estudiados, 16 presentaron interferencia clínicamente significativa. Se recomienda que cada laboratorio investigue los efectos de dicha interferencia empleando sus propios métodos, reactivos o instrumentos...


Hemolysis interference is the main cause of pre analytical rejection of serum samples in clinical laboratory. Objectives.To identify and quantify possible hemolysis interferences in the routine measurement of 25 biochemical constituents using ADVIA 1800 autoanalyzer, by clinical relevant interference criterion when the maximum desirable systematic error is exceeded. Design.Comparative descriptive study. Institution. Hospital Edgardo Rebagliati Martins, EsSalud, Lima, Peru. Biologic material. Blood samples collected from volunteer subjects. Interventions. Increasing amounts of hemoglobin (0.26 g/L, 0.53 g/L, 1.05 g/L, 2.10 g/L, 3.25 g/L, 4.30 g/L, and 5.25 g/L) were added to seven different aliquots of sera mixture and influence of interfering influence in 25 constituents was determined by duplicate. The Spanish Society of Clinical Chemistry protocol was followed. Main outcome measure. Hemolysis-related relative percentage deviation of the constituent concentration compared with the sample without interference. Results. Urea, creatinine, uric acid, total bilirubin, HDL cholesterol, LDL cholesterol, triglycerides, calcium, and gamma glutamyl transferase showed no interference. Interference was observed for glucose, protein, albumin, cholesterol, potassium, phosphorus, magnesium, lactic dehydrogenase, creatine phosphokinase, aspartate aminotransferase, alanine aminotransferase, lipase, sodium, chlorine, alkaline phosphatase and amylase. Conclusions. Out of 25 constituentss studied, 16 had clinical significant interference. It is recommended that each laboratory investigate this interference effects using their own methods, reagents or instruments...


Assuntos
Humanos , Automação Laboratorial , Qualidade da Assistência à Saúde , Hemoglobinas , Hemólise , Técnicas de Laboratório Clínico
4.
An. Fac. Med. (Perú) ; 75(3): 227-232, jul.-set. 2014. ilus, tab
Artigo em Espanhol | LILACS, LIPECS | ID: lil-728513

RESUMO

Objetivos:Determinar el grado de veracidad en los resultados de glucosa, medidos en un equipo de gasometría, mediante lacomparación con un procedimiento de uso habitual en el laboratorio, siguiendo el procedimiento indicado en la guía EP9–A2 delClinical and Laboratory Standards Institute(CLSI).Diseño:Estudio descriptivo con muestreo no probabilístico.Institución:HospitalEdgardo Rebagliati Martins, EsSalud, Lima, Perú.Material:Muestra sanguínea de 234 sujetos provenientes de los servicios deemergencia y la unidad de cuidados intensivos.Métodos:Se procesó glucemia en los equipos ADVIA1800 y el gasómetro ABL800.Se comparó los resultados de ambos analizadores siguiendo las directrices de la mencionada guía, además del análisis gráfico deBland-Altman y el cálculo del coeficiente de concordancia correlación (CCC) de Lin.Principales medidas de resultados:Concentraciónde glucosa sérica.Resultados:La media de glucemia obtenida fue 1,6 mg/dL mayor para ABL800 que para el ADVIA1800. Los dosmétodos de medida seguían una relación lineal, obteniéndose un coeficiente de correlación de 0,9995, con un intervalo de confianza(IC) al 95% de 0,9994a 0,9996. Los resultados de glucosa del método de estudio fueron aceptables según los requerimientos decalidad, lo cual se confirmó con los análisis estadísticos de Bland-Altman y el valor del CCCL de 0,9995, con un IC de 95% de 0,9993a 0,9996.Conclusiones:El analizador ABL800 resultó adecuado para la monitorización de glucemia; presentó una buena asociaciónlineal y veraz, cuando fue comparado con el método de referencia del laboratorio.


Objectives: To determine the glucose reliability results measured in a gas equipment as compared with a reference method commonly used in the laboratory. The Clinical and Laboratory Standards Institute (CLSI) guide EP9- A2 instructions were followed. Design: Descriptive study with non-probability sampling. Setting: Hospital Edgardo Rebagliati Martins, EsSalud, Lima, Peru. Materials: Blood sample of 234 subjects from the emergency services and intensive care unit. Methods: Blood glucose was processed with the ADVIA1800 equipment and the ABL800 gasometer. Results of both analyzers were compared following the mentioned guide directives, the Bland-Altman plot analysis and the Lin’s concordance correlation coefficient (CCC) calculation. Main outcome measures: Serum glucose concentration. Results: Average blood glucose levels obtained were 1.6 mg/dL higher for ABL800 than for ADVIA1800. Both methods showed a high positive correlation (beta coefficient 0.9995 and 95 per cent, 95 per cent CI 0.9994 to 0.9996). Glucose results for the method studied were acceptable, as confirmed with the Bland-Altman statistical analysis (0.9995 CCC value, 95 per cent CI 0.9993 to 0.9996). Conclusions: The ABL800 analyzer is suitable for blood glucose monitoring, presenting an excellent correlation with the reference laboratory method.


Assuntos
Humanos , Masculino , Feminino , Análise Química do Sangue/instrumentação , Gasometria/instrumentação , Glicemia , Reprodutibilidade dos Testes , Estudos Prospectivos
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