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http://dx.doi.org/10.3345/kjp.2016.59.5.231

Lipopolysaccharide-binding protein plasma levels as a biomarker of obesity-related insulin resistance in adolescents  

Kim, Ki Eun (Department of Pediatrics, CHA Gangnam Medical Center, CHA University School of Medicine)
Cho, Young Sun (Department of Pediatrics, CHA Bundang Medical Center, CHA University School of Medicine)
Baek, Kyung Suk (Department of Pediatrics, CHA Gangnam Medical Center, CHA University School of Medicine)
Li, Lan (Department of Biomedical Science, CHA Bundang Medical Center, CHA University School of Medicine)
Baek, Kwang-Hyun (Department of Biomedical Science, CHA Bundang Medical Center, CHA University School of Medicine)
Kim, Jung Hyun (Atmin Radiology and Health Promotion Center)
Kim, Ho-Seong (Department of Pediatrics, Severance Children's Hospital, Yonsei University College of Medicine)
Sheen, Youn Ho (Department of Pediatrics, CHA Gangnam Medical Center, CHA University School of Medicine)
Publication Information
Clinical and Experimental Pediatrics / v.59, no.5, 2016 , pp. 231-238 More about this Journal
Abstract
Purpose: Lipopolysaccharide-binding protein (LBP) is a 65-kDa acute phase protein, derived from the liver, which is present in high concentrations in plasma. Data regarding the association between circulating plasma LBP levels and obesity-related biomarkers in the pediatric population are scarce. We aimed to determine whether there was a difference in plasma LBP levels between overweight/obese and normal-weight adolescents and to assess the correlation of circulating LBP levels with anthropometric measures and obesity-related biomarkers, including insulin resistance, liver enzyme levels, and lipid profiles. Methods: The study included 87 adolescents aged 12-13 years; 44 were overweight/obese and 43 were of normal-weight. We assessed anthropometric and laboratory measures, including body mass index (BMI), blood pressure, insulin resistance, liver enzyme levels, and lipid profiles. Plasma LBP levels were measured using an enzyme-linked immunosorbent assay. Results: The mean age of the participants was $12.9{\pm}0.3$ years. Circulating plasma LBP levels were significantly increased in overweight/obese participants compared with those in normal-weight participants ($7.8{\pm}1.9{\mu}g/mL$ vs. $6.0{\pm}1.6{\mu}g/mL$, P<0.001). LBP levels were significantly and positively associated with BMI, systolic blood pressure, aspartate aminotransferase, alanine aminotransferase, total cholesterol, low density lipoprotein-cholesterol, fasting glucose and insulin, and insulin resistance as indicated by the homeostatic model assessment of insulin resistance (HOMA-IR) (all P<0.05). In multivariate linear regression analysis, BMI and HOMA-IR were independently and positively associated with plasma LBP levels. Conclusion: LBP is an inflammatory biomarker associated with BMI and obesity-related insulin resistance in adolescents. The positive correlation between these parameters suggests a potentially relevant pathophysiological mechanism linking LBP to obesity-related insulin resistance in adolescents.
Keywords
Lipopolysaccharide-binding protein; Body mass index; Insulin resistance; Adolescent; Obesity;
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