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1.
Endocrinol. diabetes nutr. (Ed. impr.) ; 66(1): 35-40, ene. 2019. tab, graf
Artigo em Inglês | IBECS | ID: ibc-175791

RESUMO

Background and objective: Increased visceral adipose tissue mass is strongly associated to metabolic disorders. Visfatin is a visceral fat adipocytokine. There is epidemiological evidence of a link between a suboptimal gestational environment and a greater propensity to develop metabolic disease in adult life. The objective of this study was to establish whether visfatin concentrations in umbilical cord blood are different in newborns small for gestational age (SGA), appropriate for gestational age (AGA), and large for gestational age (LGA). Subjects and methods: Term newborns from an university medical center were included in the study. A blood sample was taken from the umbilical cord vein of each baby immediately after birth. Visfatin was measured using an enzyme immunoassay in the study population, consisting of 35 subjects in the SGA group, 58 in the AGA group, and 35 in the LGA group. Results: Cord blood visfatin concentrations were not different in the three groups, with respective values of 2.78 (1.86-4.49) ng/mL, 3.28 (1.98-4.97) ng/mL, and 3.46 (2.48-5.38) ng/mL in the SGA, AGA and LGA groups (p=0.141). Gestational weight gain (GWG) (14.09±6.37kg) was negatively associated to visfatin levels (r=−0.218, p=0.036). GWG is an independent predictor of visfatin concentrations (r2=−0.067, p=0.027). Conclusions: There were no differences in cord blood visfatin concentrations depending on birth weight. GWG is an independent predictor of visfatin levels in the cord blood of term newborns


Antecedentes y objetivo: El aumento de la masa de tejido adiposo visceral está fuertemente asociado con trastornos metabólicos. La visfatina es una adipocitoquina de la grasa visceral. Existe evidencia epidemiológica de un vínculo entre un entorno gestacional subóptimo y una mayor propensión a desarrollar enfermedades metabólicas en la vida adulta. El objetivo de este estudio es determinar si las concentraciones de visfatina en la sangre del cordón umbilical son diferentes entre recién nacidos pequeños para edad gestacional (PEG), apropiados para edad gestacional (AEG) y grandes para edad gestacional (GEG). Materiales y métodos: Se incluyeron los recién nacidos a término de un centro médico universitario. Se tomó una muestra de sangre de la vena del cordón umbilical de cada niño inmediatamente después del nacimiento. La visfatina se midió mediante inmunoensayo enzimático en la población de estudio, que incluyó 35 sujetos en el grupo PEG, 58 en el AEG y 35 en el GEG. Resultados: Las concentraciones de visfatina en sangre del cordón umbilical no fueron diferentes entre los 3 grupos de estudio, 2,78 (1,86-4,49) ng/ml, 3,28 (1,98-4,97) ng/ml, 3,46 (2,48-5,38) ng/ml para el PEG, AEG y GEG, respectivamente (p=0,141). El aumento de peso gestacional (GWG) (14,09±6,37kg) se asoció negativamente con los niveles de visfatina (r=−0,218, p=0,036). El GWG es un predictor independiente de los niveles de visfatina (r2=−0,067, p=0,027). Conclusiones: Los niveles de visfatina en sangre del cordón umbilical no tienen un comportamiento diferenciado según el peso al nacer. El GWG es un predictor independiente de los niveles de visfatina en la sangre del cordón umbilical de recién nacidos a término


Assuntos
Humanos , Masculino , Feminino , Recém-Nascido , Lactente , Nicotinamida Fosforribosiltransferase/sangue , Cordão Umbilical , Peso ao Nascer , Nicotinamida Fosforribosiltransferase/análise , Cordão Umbilical/metabolismo , Adipocinas
2.
An. pediatr. (2003, Ed. impr.) ; 78(3): 189-189[e1-e15], mar. 2013. ilus, tab
Artigo em Espanhol | IBECS | ID: ibc-109982

RESUMO

El incremento universal de la prevalencia de obesidad en niños y adolescentes durante las últimas décadas, junto con la evidencia creciente de que el establecimiento de obesidad en etapas precoces de la vida, está asociado con un incremento de la prevalencia de comorbilidades y del riesgo de muerte prematura, con gran repercusión económica en los sistemas sanitarios de los países occidentales, y ha impulsado la investigación en esta área. Estos estudios han remarcado la importante actividad endocrina del tejido adiposo, ejercida por medio de la síntesis y secreción de un gran número de péptidos y citoquinas, denominados adipoquinas. En esta revisión se resume el estado actual de los conocimientos, así como los estudios más relevantes, en relación con la dinámica de secreción de las principales adipoquinas en niños, centrándose en el control de la homeostasia energética, la regulación metabólica (fundamentalmente el metabolismo de los hidratos de carbono) y la inflamación. Así mismo, se analizan las particularidades de la síntesis, secreción y acciones de las adipoquinas desde el nacimiento hasta la adolescencia, reseñando el efecto que, sobre ellas, ejerce la instauración de la obesidad(AU)


The worldwide increase in the prevalence of obesity in children and adolescents during the last decades, as well as the mounting evidence indicating that obesity is associated with an increased incidence of comorbidities and the risk of premature death, resulting in a high economic impact, has stimulated obesity focused research. These studies have highlighted the prominent endocrine activity of adipose tissue, which is exerted through the synthesis and secretion of a wide variety of peptides and cytokines, called adipokines. This review presents a summary of the current knowledge and most relevant studies of adipokine dynamics and actions in children, focusing on the control of energy homeostasis, metabolic regulation (particularly carbohydrate metabolism), and inflammation. The particularities of adipose secretion and actions in healthy children, from birth to adolescence, and the modifications induced by early onset obesity are highlighted(AU)


Assuntos
Humanos , Masculino , Feminino , Criança , Adipocinas/análise , Obesidade/fisiopatologia , Resistência à Insulina/fisiologia , Mediadores da Inflamação/análise , Valores de Referência , Lectinas/análise , Adiponectina/análise , Nicotinamida Fosforribosiltransferase/análise , Resistina/análise , Tecido Adiposo Branco/química , Interleucina-6/análise , Fatores de Necrose Tumoral/análise
3.
Med. oral patol. oral cir. bucal (Internet) ; 18(2): 180-186, mar. 2013. ilus, tab
Artigo em Inglês | IBECS | ID: ibc-112383

RESUMO

Objectives: Visfatin, also known as nicotiamide phosphoribosyltransferase or pre-B cell colony enhancing factor, is a pro-inflammatory cytokine whose serum level is increased in various cancers. In this study, we investigated whether plasma visfatin levels were altered in patients with oral squamous cell carcinoma (OSCC). The relationship between plasma visfatin levels and the pretreatment hematologic profile was also explored. Study Design: Plasma visfatin concentrations were measured through ELISA in OSCC patients and control sub- Design: Plasma visfatin concentrations were measured through ELISA in OSCC patients and control sub-design: Plasma visfatin concentrations were measured through ELISA in OSCC patients and control subjects. A total of 51 patients with OSCC and 57 age- and body mass index (BMI)-matched control subjects were studied. All study subjects were male. Results: Plasma visfatin was found to be elevated in patients with OSCC (7.0 ± 4.5 vs. 4.8 ± 1.9 ng/ml, p = 0.002). Multiple logistic regression analysis revealed visfatin as an independent association factor for OSCC, even after full adjustment of known biomarkers. Visfatin level was significantly correlated with white blood (..) (AU)


Assuntos
Humanos , Masculino , Nicotinamida Fosforribosiltransferase/sangue , Neoplasias de Células Escamosas/patologia , Neoplasias Bucais/patologia , Contagem de Leucócitos , Neutrófilos
4.
Med. clín (Ed. impr.) ; 137(5): 199-203, sept. 2011.
Artigo em Espanhol | IBECS | ID: ibc-91782

RESUMO

Fundamento y objetivo: La obesidad y resistencia a la insulina se asocian con diferentes factores de riesgo cardiovascular. El objetivo de este estudio fue explorar la relación de la visfatina circulante con la resistencia a la insulina, factores de riesgo cardiovascular y antropometría en una muestra de pacientes obesos sin comorbilidad asociada. Pacientes y método: Una muestra de 270 pacientes ambulatorios con obesidad se analizó de manera prospectiva. A todos los pacientes se les realizó un análisis bioquímico (lipidograma, insulina, HOMA y visfatina) y una evaluación nutricional (ingesta dietética, antropometría convencional e impedanciometría). Resultados: Los pacientes fueron divididos en dos grupos por el valor de la mediana de visfatina (8,32 ng/ml): grupo I (pacientes con valores bajos, cuyo valor medio [DE] fue 7,11 [0,7] ng/ml) y grupo II (pacientes con valores altos, cuyo valor medio fue de 13,5 [10,1] ng/ml). Los pacientes en el grupo I tienen unos valores más elevados de indice de masa corporal, peso, circunferencia de la cintura, e indice cintura cadera. Los pacientes del grupo I presentan tambien unos valores más bajos de colesterol unido a lipoproteínas de baja densidad (colesterol LDL) y proteína C reactiva. El análisis de correlación mostró una correlación positiva entre los valores de visfatina y los de colesterol LDL (r=0,194; p<0,05) y proteína C reactiva (r=0,266; p<0,05) y una correlacion negativa con el peso (r=-0,162; p<0,05). En el análisis de regresión logística ajustado por sexo, edad e ingesta dietética con la variable dependiente visfatina (grupoII/I), permanecieron en el modelo el peso (odds ratio [OR] 0,97, intervalo de confianza del 95% [IC 95%] 0,95-0,99), colesterol LDL (OR 1,012, IC 95% 1,010-1,023) y la proteína C reactiva (OR 1,15, IC 95% 1,03-1,3). Conclusión: El colesterol LDL y los valores de proteína C reactiva se relacionan de manera positiva con los valores de visfatina, presentado el peso una relación negativa en pacientes obesos, de manera independiente ajustado por edad, sexo e ingesta dietética (AU)


Background and objective: Obesity and insulin resistance are associated with cardiovascular risk factors. The aim of the present study was to explore the relation of visfatin with insulin resistance, cardiovascular risk factors and anthropometry in obese patients without comorbidities. Patients and method: A population of 270 obese patients was analyzed in a prospective way. In all patients we performed a biochemical analysis (lipid profile, insulin, HOMA and visfatina), and a nutritional evaluation (dietary intake, conventional anthropometry and bioimpedance). Results: Patients were divided in two groups by median visfatin value (8,32 ng/ml), group I (patients with the low values, average value 7,11 (0,7) ng/ml) and group II (patients with the high values, average value 13,5 (10,1) ng/ml). Patients in the group I had higher weight, body mass index, waist circumference, and waist to hip ratio than patients in group II. Patients in group I had lower LDL-cholesterol and C reactive protein than patients in group II. Correlation analysis showed a positive correlation between visfatin levels and LDL cholesterol (r=0.194; p<0.05) and C reactive protein (r=0.266; p<0.05) and a negative corelation with weight (r=-0.162; p<0.05). In the logistic analysis with age-, sex- and dietary intake- adjusted basal visfatin concentration as a dependent variable, the next variables remained in the model; weight with an odds ratio (OR) 0,97 (IC95% 0,95-0,99), LDL cholesterol 1,012(1,010-1.023) and C reactive protein 1,15 (1.03-1.3). Conclusion: LDL cholesterol and c reactive protein levels are positively correlated with visfatin levels. Weight is negatively correlated with visfatin levels, in an independent way and adjusted by age, sex and dietary intake (AU)


Assuntos
Humanos , Nicotinamida Fosforribosiltransferase/farmacocinética , Obesidade/tratamento farmacológico , Fatores de Risco , Estudos Prospectivos , Doenças Cardiovasculares/prevenção & controle
5.
J. physiol. biochem ; 65(4): 351-359, dic. 2009.
Artigo em Inglês | IBECS | ID: ibc-122857

RESUMO

No disponible


Visfatin, a protein identified as a secretion product of visceral fat in humans and mice, is also expressed in different anatomical locations, and is known as pre-B cell-colony enhancing factor (PEBF1). It is also an enzyme displaying nicotinamide phosphoribosyltransferase activity (Nampt). The evidence that levels of visfatin correlate with visceral fat mass has been largely debated and widely extended to other regulations in numerous clinical studies and in diverse animal models. On the opposite, the initial findings regarding the capacity of visfatin/Nampt/PEBF1 to bind and to activate the insulin receptor have been scarcely reproduced, and even were contradicted in recent reports. Since the putative insulin mimicking effects of visfatin/Nampt/PEBF1 have never been tested on mature human adipocytes, at least to our knowledge, we tested different human visfatin batches on human fat cells freshly isolated from subcutaneous abdominal fat and exhibiting high insulin responsiveness. Up to 10 nM, visfatin was devoid of clear activatory action on glucose transport in human fat cells while, in the same conditions, insulin increased by more than threefold the basal 2-deoxyglucose uptake. Moreover, visfatin was unable to mimic the lipolysis inhibition induced by insulin. Visfatin definitively cannot be considered as a direct activator of insulin signalling in human fat cells. Nevertheless its in vivo effects on insulin release and on glucose handling deserve to further study the role of this multifunctional extracellular enzyme in obese and diabetic states (AU)


Assuntos
Humanos , Nicotinamida Fosforribosiltransferase/farmacocinética , Adipócitos , Insulina , Espaço Extracelular/enzimologia , Diabetes Mellitus/fisiopatologia , Obesidade/fisiopatologia
6.
Reumatol. clín. (Barc.) ; 5(extr.1): 6-12, abr. 2009. tab, ilus
Artigo em Espanhol | IBECS | ID: ibc-78370

RESUMO

El interés científico en la biología del tejido adiposo blanco (TAB) se ha incrementado desde el descubrimiento de la leptina en 1994. La descripción de los efectos de la leptina (el producto del gen ob) ha empezado a aclarar el papel del tejido adiposo en la fisiopatología de las enfermedades relacionadas con la obesidad y ha ayudado a la identificación de otras muchas moléculas (denominadas adipocinas), algunas de ellas de naturaleza proinflamatoria. En las enfermedades reumáticas, las adipocinas derivadas del TAB están entre los factores más importantes relacionados con la obesidad que promueven las enfermedades inflamatorias o autoinmunes. En esta revisión se recopilarán los avances más recientes en la investigación sobre las adipocinas, y se prestará particular atención al papel de la leptina, la adiponectina, la resistina y la visfatina en enfermedades inflamatorias, autoinmunes y reumáticas (AU)


Scientific interest in the biology of white adipose tissue (WAT) has increased since the discovery of leptin in 1994. The description of the effects of leptin, the product of the ob gene, has started to clarify the role of adipose tissue in the physiopathology of obesity related diseases and has helped in the identification of a great number of other molecules (named adipocytokines), some of them with a proinflammatory nature. In rheumatic diseases, adipocytokines derived from the WAT are among the most important factors related to obesity and promote inflammatory and/or autoimmune conditions. In this review we will present the most recent advances in adipocytokine research, with special attention to the role of leptin, adiponectin, resistin and visfatin and inflammatory, autoimmune and rheumatic diseases (AU)


Assuntos
Humanos , Mediadores da Inflamação/imunologia , Imunidade/fisiologia , Adipocinas/imunologia , Osteoartrite/imunologia , Inflamação/fisiopatologia , Tecido Adiposo Branco/fisiologia , Leptina , Adiponectina , Resistina , Nicotinamida Fosforribosiltransferase
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