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Triglycerides-to-HDL ratio as a new marker of endothelial dysfunction in obese prepubertal children.
European Journal of Endocrinology 2014 Februrary
OBJECTIVE: To investigate whether there is an association of the triglyceride-to-HDL cholesterol (TG:HDL-C) ratio with cardiovascular risk factors and early signs of vascular damage in obese prepubertal children.
DESIGN AND METHODS: In 50 obese (27 boys, 7.8±1.4 years) and 37 normal-weight (20 boys; 7.3±1.5 years) prepubertal children, anthropometric measurements, oxidative stress markers (urinary isoprostanes (PGF2α (prostaglandin F2α)), soluble receptor for advanced glycation end-products (sRAGE)) and insulin sensitivity (homeostasis model assessment of insulin resistance (HOMA-IR) and whole-body insulin sensitivity index (WBISI)) were evaluated. Lipids profile was assessed and the TG:HDL-C ratio was calculated. In addition, high-resolution ultrasound was performed to assess carotid intima-media thickness (cIMT).
RESULTS: Obese children showed significantly higher values of the TG:HDL-C ratio (1.9±1.1 vs 1.2±0.6, P=0.002) compared with controls. After dividing the population in tertiles of the TG:HDL-C ratio (<1.04, 1.04-1.67, >1.67), cIMT (P=0.0003), and HOMA-IR (P=0.0001) progressively increased from the lower to the upper tertile, whereas WBISI (P=0.0003) and sRAGE (P=0.05) progressively decreased. In a regression model, the TG:HDL ratio was significantly and positively associated with cIMT (r=0.493; P=0.0005). A cutoff point for TG:HDL-C ratio of 1.12 had 81% sensitivity and 49% specificity in the identification of children with cIMT values in the upper quartile (Area under the curve values from receiver operating characteristic curves=0.633±0.065, P=0.045).
CONCLUSION: This study confirms the reliability of the TG:HDL-C ratio as a useful marker of cardiovascular risk. Interestingly, our results underline that the TG:HDL-C ratio is directly related with early signs of vascular damage already present in prepubertal children.
DESIGN AND METHODS: In 50 obese (27 boys, 7.8±1.4 years) and 37 normal-weight (20 boys; 7.3±1.5 years) prepubertal children, anthropometric measurements, oxidative stress markers (urinary isoprostanes (PGF2α (prostaglandin F2α)), soluble receptor for advanced glycation end-products (sRAGE)) and insulin sensitivity (homeostasis model assessment of insulin resistance (HOMA-IR) and whole-body insulin sensitivity index (WBISI)) were evaluated. Lipids profile was assessed and the TG:HDL-C ratio was calculated. In addition, high-resolution ultrasound was performed to assess carotid intima-media thickness (cIMT).
RESULTS: Obese children showed significantly higher values of the TG:HDL-C ratio (1.9±1.1 vs 1.2±0.6, P=0.002) compared with controls. After dividing the population in tertiles of the TG:HDL-C ratio (<1.04, 1.04-1.67, >1.67), cIMT (P=0.0003), and HOMA-IR (P=0.0001) progressively increased from the lower to the upper tertile, whereas WBISI (P=0.0003) and sRAGE (P=0.05) progressively decreased. In a regression model, the TG:HDL ratio was significantly and positively associated with cIMT (r=0.493; P=0.0005). A cutoff point for TG:HDL-C ratio of 1.12 had 81% sensitivity and 49% specificity in the identification of children with cIMT values in the upper quartile (Area under the curve values from receiver operating characteristic curves=0.633±0.065, P=0.045).
CONCLUSION: This study confirms the reliability of the TG:HDL-C ratio as a useful marker of cardiovascular risk. Interestingly, our results underline that the TG:HDL-C ratio is directly related with early signs of vascular damage already present in prepubertal children.
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