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Ultrasensitive C-reactive protein as biomarker of cardiometabolic risk in a group of obese children and adolescents

Bonina Costa, G. L. O.; Medeiros, B. C. d. S.; Araujo, Y. N.; Junior, L. S. M.; Jesus, P. U. d. S.; Menezes, C. A.

2020-08-16 pediatrics
10.1101/2020.08.14.20175182 medRxiv
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ObjectiveTo establish the importance of evaluating ultrasensitive C-reactive protein (us-CRP) in a pediatric group with obesity as the main biomarker, detecting, as early as possible, cardiometabolic complications. MethodsThis is a control-case, cross-sectional study involving the biochemical and anthropometric evaluation of 342 children and adolescents participating in the Preventive Medicine Service, in Aracaju, Sergipe, Brazil. When evaluated anthropometrically, it was observed that, in 235 of the cases, the body mass index (BMI) above the 97th percentile or the Z-score greater than +2 allowed their classification as obese. The control group consisted of 107 non-obese individuals. The sample was divided into three age groups according to the International Diabetes Federation (FID): 6-10 years, 10-16 years and >16 years, representing 45%, 39% and 14% of the sample population, respectively. ResultsThe CRP-us showed an average value of 2.36 {+/-} 1.28 mg/dL in the obese group, while in the control group, the result found was 0.01 {+/-} 0.1 mg/dL. There was a significant correlation between the increase in CRP levels in the obese group and other biochemical and anthropometric findings in the same group, such as: reduced HDL, elevated triglycerides, higher BMI, and increased abdominal circumference (AC). Homocysteine, in turn, proved to be a biomarker with little specificity in the sample in question. ConclusionThe ultra-sensitive C-reactive protein, already fundamentally correlated with increased cardiovascular risk in adults, demonstrates to be a validated biomarker, showing high sensitivity even in pediatric obese populations. RESUMOO_ST_ABSObjetivoC_ST_ABSEstabelecer a importancia da avaliacao da proteina C reativa ultrassensivel (PCR-us) como principal biomarcador em um grupo pediatrico com obesidade, detectando precocemente possiveis complicacoes cardiometabolicas. MetodosTrata-se de um estudo caso-controle, transversal envolvendo avaliacao bioquimica e antropometrica de 342 criancas e adolescentes, participantes do Servico de Medicina Preventiva, em Aracaju-Sergipe, Brasil. Quando avaliados antropometricamente, observou-se que em 235 participantes o IMC acima do percentil 97 ou o Z-escore maior que +2 permitia classifica-los como obesos. O grupo controle consistiu de 107 individuos nao obesos. A amostra foi dividida em tres faixas etarias de acordo com a Federacao Internacional de Diabetes (FID): 6-10 anos, 10-16 anos e > 16 anos, representando, respectivamente, 45%, 39% e 14% da populacao amostral. ResultadosA PCR-us apresentou um valor medio de 2.36 {+/-} 1.28 mg/dL no grupo obeso, enquanto no grupo controle o resultado encontrado foi de 0.01 {+/-} 0.1 mg/dL. Observou-se uma correlacao significativa do aumento dos niveis de PCR-us no grupo obeso com outros achados bioquimicos e antropometricos do mesmo conjunto, como: reducao do HDL, elevacao de triglicerides, maior grau de IMC e aumento da CA. A homocisteina, por sua vez, demonstrou ser um biomarcador com pouca especificidade na amostra em questao. ConclusaoA proteina C reativa ultrassensivel, ja fundamentadamente correlacionada ao aumento do risco cardiovascular em adultos, demonstra ser um validado biomarcador, apresentando alta sensibilidade mesmo em populacoes pediatricas obesas.

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