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      Aterosclerose subclínica e marcadores inflamatórios em crianças e adolescentes obesos e não obesos Translated title: Atherosclerosis subclinical and inflammatory markers in obese and nonobese children and adolescents

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          Abstract

          OBJETIVO: Realizou-se revisão sistemática sobre espessamento médio-intimal (EMI) e marcadores inflamatórios, comparou-se EMI por metanálise e analisou-se a correlação entre EMI e variáveis inflamatórias em crianças e adolescentes obesos e não obesos. FONTES DOS DADOS: Buscaram-se artigos nas bases de dados Pubmed, Bireme e Science Direct, nos anos de 2000 a 2010, com as seguintes palavras-chave em inglês: "obesity", "adolescents", "atherosclerosis" e "child", sendo utilizados em duas combinações: obesity+adolescents+atherosclerosis e obesity+child+atherosclerosis. Utilizou-se meta-análise para comparar EMI entre obesos e não obesos. SINTESE DOS DADOS: Selecionou-se criteriosamente 16 artigos para análise final. Houve diferença da espessura de EMI entre obesos e não obesos em 12 estudos, confirmada pela meta-análise. Os obesos apresentaram concentrações de proteína C-reativa mais elevada em 13 artigos analisados (p < 0,05) e menores de adiponectina em 4 (p < 0,05). Em geral, os obesos apresentaram concentrações menores de adiponectina e maiores valores de EMI e Proteina C-reativa do que os não-obesos, evidenciando relação entre obesidade e início de processo inflamatório. CONCLUSÕES: Conclui-se que há relação da obesidade com aumento do EMI e alterações nas concentrações dos marcadores inflamatórios nesta fase.

          Translated abstract

          We conducted a systematic review of intima-media thickness(IMT) and inflammatory markers, compared IMT and identified by meta-analysis related to EMI and inflammatory variables in obese and non-obese children and adolescents. We searched for articles in databases Pubmed, Bireme and Science Direct, during years 2000 to 2010, with the following key words in English: "obesity", "adolescents", "atherosclerosis" and "child ", They were used in two combinations: obesity + adolescents + atherosclerosis + child + obesity and atherosclerosis. We used meta-analysis to compare IMT between obese and non-obese patients. We carefully selected 16 articles for final analysis. There were differences in the thickness of IMT between obese and non-obese patients in 12 studies, confirmed by meta-analysis. Obese patients had concentrations of C-reactive protein higher in 13 articles analyzed (p < 0.05) and lower adiponectin levels in 4 (p < 0.05). In general, obese men had lower concentrations of adiponectin and higher values of IMT and C-reactive protein than non-obese men, showing the relationship between obesity and early inflammatory process. We concluded that there is a relationship of obesity with increased IMT and changes in concentrations of inflammatory markers in this phase.

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          Most cited references74

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          Deaths: final data for 2006.

          This report presents final 2006 data on U.S. deaths, death rates, life expectancy, infant and maternal mortality, and trends by selected characteristics such as age, sex, Hispanic origin, race, marital status, educational attainment, injury at work, state of residence, and cause of death. It also presents more detailed information than previously presented about the mortality experience of the American Indian or Alaska Native and the Asian or Pacific Islander populations. Information reported on death certificates, which are completed by funeral directors, attending physicians, medical examiners, and coroners, is presented in descriptive tabulations. The original records are filed in state registration offices. Statistical information is compiled in a national database through the Vital Statistics Cooperative Program of the Centers for Disease Control and Prevention's National Center for Health Statistics. Causes of death are processed in accordance with the International Classification of Diseases, Tenth Revision (ICD-10). In 2006, a total of 2,426,264 deaths were reported in the United States. The age-adjusted death rate was 776.5 deaths per 100,000 standard population, a decrease of 2.8 percent from the 2005 rate and a record low historical figure. Life expectancy at birth rose 0.3 years, from a revised 2005 value of 77.4 years to a record 77.7 years in 2006. Age-specific death rates increased for those aged 25-34 years but decreased for most other age groups: 5-14 years, 35-44 years, 45-54 years, 55-64 years, 65-74 years, 75-84 years, and 85 years and over. The 15 leading causes of death in 2006 remained the same as in 2005. Heart disease and cancer continued to be the leading and second-leading causes of death, together accounting for almost half of all deaths. The infant mortality rate in 2006 was 6.69 deaths per 1,000 live births. Mortality patterns in 2006, such as the decline in the age-adjusted death rate to a record historical low, were generally consistent with long-term trends. Life expectancy increased in 2006 from 2005.
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            Impaired flow-mediated vasodilation, carotid artery intima-media thickening, and elevated endothelial plasma markers in obese children: the impact of cardiovascular risk factors.

            Childhood obesity contributes to the development of adult obesity and subsequent cardiovascular disease. The present study aimed to assess vascular status (flow-mediated vasodilation [FMD], intima-media thickness [IMT]) and to analyze plasma surrogate endothelial markers (von Willebrand factor [vWf], E-selectin, and thrombomodulin) in obese children as compared with controls. Associations between early morphologic and functional vascular changes, surrogate soluble markers of early atherosclerosis, and the cardiovascular risk profile were determined. We examined 32 obese children versus 20 control subjects. All of the children underwent identical screening, comprehensive risk factor assessment, and measurements of E-selectin, vWf, thrombomodulin, FMD, and IMT. Compared with controls, obese children demonstrated significantly impaired FMD and increased IMT. Concentrations of soluble E-selectin and thrombomodulin were significantly elevated in obese children, whereas vWf showed no significant differences between obese children and controls. FMD, IMT, E-selectin, and thrombomodulin were significantly associated with various risk factors, including the extent of obesity, arterial hypertension, fibrinogen, C-reactive protein, and low physical fitness. The present study documented increased IMT, impaired endothelial function, and elevated plasma markers of endothelial activation and injury in obese children. Morbid obesity, arterial hypertension, subclinical inflammation, and low physical fitness formed a risk profile associated with the risk of early atherosclerosis in these children. Sonographic assessment of vascular status and the estimation of soluble endothelial plasma markers, combined with comprehensive risk factor screening, may form a rationale to identify high-risk children susceptible to early atherosclerotic disease and to monitor vascular changes during follow-up studies and therapeutic measures.
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              Determinants of early atherosclerosis in obese children and adolescents.

              Obesity in childhood is associated with an increased mortality due to cardiovascular (CV) diseases in adulthood, independent of adult weight. Recent studies in children indicate that the atherosclerosis process starts at an early age and is linked to obesity. The aim of the study was to investigate determinants of increased carotid intima-media thickness (IMT), an early marker of atherosclerosis, in obese children. A total of 104 obese children [age, 12.7 +/- 0.2 yr; body mass index (BMI)-z-score, 2.8 +/- 0.7] underwent an oral glucose tolerance test. Fasting levels of glucose, insulin, C-reactive protein and adhesion molecules (sICAM, sVCAM, sE-selectin), lipid profile, adiponectin, and resistin were determined. IMT was measured by ultrasound. Insulin resistance was estimated by the homeostatic model assessment index. Baseline measurements of blood parameters were obtained from 93 nonobese children (age, 13.0 +/- 0.2 yr; BMI-z-score, -0.2 +/- 0.9), and IMT was measured in 23 other control children with similar characteristics. Univariate analysis showed a significant positive correlation between IMT and relative BMI, the degree of systolic hypertension, fasting insulin levels, homeostatic model assessment-R index, and resistin concentrations, whereas an inverse correlation with adiponectin levels was found. No correlation was obtained between IMT and classical CV risk factors such as positive familial history of type 2 diabetes or precocious CV disease, visceral obesity, or the lipid profile. C-reactive protein and adhesion molecule levels were not associated with IMT in our obese population. When controlled for sex, Tanner stage, and relative BMI, only adiponectin levels remained an independent determinant of IMT. Adiponectin more than conventional CV risk factors and inflammation status may be related to early atherosclerosis in obese children.
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                Author and article information

                Journal
                rbepid
                Revista Brasileira de Epidemiologia
                Rev. bras. epidemiol.
                Associação Brasileira de Saúde Coletiva (Rio de Janeiro, RJ, Brazil )
                1415-790X
                1980-5497
                December 2012
                : 15
                : 4
                : 804-816
                Affiliations
                [02] Paraná orgnameUniversidade Federal do Paraná orgdiv1Departamento de Educação Física Brazil
                [01] Paraná orgnameUniversidade Federal do Paraná orgdiv1Departamento de Educação Física Brazil
                Article
                S1415-790X2012000400012 S1415-790X(12)01500400012
                10.1590/S1415-790X2012000400012
                431ba023-d83c-4c1b-b061-721cf6832fc7

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 14 June 2011
                : 07 November 2011
                : 03 April 2012
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 40, Pages: 13
                Product

                SciELO Public Health

                Self URI: Texto completo somente em PDF (PT)
                Self URI: Full text available only in PDF format (EN)
                Categories
                Artigos Originais

                C-reactive protein,Child,Adiponectin,Proteína C-reativa,Meta-analysis,Adiponectina,Crianças,Aterosclerose,Metanálise,Atherosclerosis,Ultrasonography,Obesidade,Obesity,Ultrassonografia

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