ResumoObjetivos: Determinar as concentrações de proteína C reativa ultra-sensível (PCR-US) em crianças/adolescentes com e sem obesidade e sua correlação com o índice de massa corporal (IMC) e variáveis clínico-laboratoriais.Métodos: Estudo transversal comparativo de grupos paralelos, sendo um grupo de crianças/adolescentes com sobrepeso ou obesidade (grupo obesidade, n = 131) e grupo controle de crianças/adolescentes não obesos (grupo controle, n = 114). Os valores de PCR-US foram determinados através de nefelometria de alta sensibilidade.Resultados: O grupo obesidade apresentou maiores concentrações de PCR-US que o grupo controle (p < 0,0005). Os valores de PCR-US relacionaram-se com IMC (p < 0,0001) e com dosagens de triglicerídeos (p = 0,05). Após ajuste pelo IMC, a relação entre PCR-US e triglicerídeos foi atenuada, deixando de ter significância estatística (p = 0,10). Conclusões:Os valores da PCR-US elevaram-se à medida que o IMC se elevou. A maioria dos indivíduos sem excesso de peso apresentou concentrações de PCR-US abaixo de 2 mg/L. J Pediatr (Rio J). 2007;83(5):477-480:Obesidade, sobrepeso, inflamação, proteína C reativa. AbstractObjectives: To determine the levels of high sensitivity C-reactive protein (hsCRP) in children/adolescents with and without obesity and their correlation with body mass index (BMI) and clinical and laboratory variables. Methods:A cross-sectional study comparing two parallel groups, one a group of overweight or obese children/adolescents (obesity group, n = 131) and the other a control group of children/ adolescents without obesity (control group, n = 114). High sensitivity nephelometry was used to determine hsCRP concentrations. Results:The obesity group exhibited greater hsCRP concentrations than the control group (p < 0.0005). There were relationships between hsCRP and BMI (p < 0.0001) and hsCRP and triglycerides (p = 0.05). The relationship between hsCRP and triglycerides was attenuated by adjustment for BMI, losing its statistical significance (p = 0.10). Conclusions:The hsCRP concentrations increased as BMI increased. The majority of individuals who were not overweight exhibited hsCRP concentrations of less than 2 mg/L. J Pediatr (Rio J). 2007;83(5):477-480:Obesity, overweight, inflammation, C-reactive protein. IntroduçãoAssociação entre obesidade, doença cardiovascular e diabete foi demonstrada em vários estudos, porém sem definição de causalidade. Recentes pesquisas têm apontado a reação inflamatória como fator comum entre essas doenças 1,2 . O tecido adiposo secreta substâncias (fator de necrose tumoral-α, interleucina-6, adiponectina, resistina) que têm ação no endotélio vascular e no metabolismo da glicose e dos lipídeos 3,4 . A proteína C reativa (PCR) é produzida no fígado, em resposta ao estímulo das citocinas inflamatórias. Sua dosagem vem sendo utilizada, desde a década de 1970, para diagnós-tico de estados inflamatórios e infecções 5 . Recentemente,
Objectives: To determine the levels of high sensitivity C-reactive protein (hsCRP) in children/adolescents with and without obesity and their correlation with body mass index (BMI) and clinical and laboratory variables. Methods:A cross-sectional study comparing two parallel groups, one a group of overweight or obese children/adolescents (obesity group, n = 131) and the other a control group of children/adolescents without obesity (control group, n = 114). High sensitivity nephelometry was used to determine hsCRP concentrations. Results:The obesity group exhibited greater hsCRP concentrations than the control group (p < 0.0005). There were relationships between hsCRP and BMI (p < 0.0001) and hsCRP and triglycerides (p = 0.05). The relationship between hsCRP and triglycerides was attenuated by adjustment for BMI, losing its statistical significance (p = 0.10). Conclusions:The hsCRP concentrations increased as BMI increased. The majority of individuals who were not overweight exhibited hsCRP concentrations of less than 2 mg/L. J Pediatr (Rio J). 2007;83(5):477-480:Obesity, overweight, inflammation, C-reactive protein.
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