Three distinct glucose response curves, biphasic, monophasic and incessant increase, have been demonstrated in adults and adolescents during OGTT. Individuals with incessant increase and monophasic curves have increased risk of type 2 diabetes and decreased insulin sensitivity and secretion and thus are likely at increased risk for other cardiometabolic diseases. We, therefore, examined differences in traditional, and nontraditional cardiometabolic risk factors between obese adolescents with biphasic (n=9; age=12.6±0.9 yr, BMI=31.8±5.9 kg/m2; mean±SD) and monophasic (n=6; age=13.1±0.9; BMI=35.3±6.9) glucose response curves. Traditional risk factors were blood pressure and lipids while non-traditional risk factors included reactive hyperemia (RH), inflammatory markers [c-reactive protein (CRP), interleukin-6 (IL-6)], adiponectin, soluble intracellular adhesion molecule 1 (SICAM1), and insulin sensitivity and secretion (OGTT, Matsuda and insulinogenic indices). Systolic and diastolic blood pressure, triglycerides, HDL and LDL did not differ between groups. RH, Il-6 and Matsuda index also did not differ. Subjects with monophasic curves tended to have increased SICAM1 (260±33 vs. 184±21; mean±SE; p=0.087) and had significantly increased CRP levels (4.40±1.03 vs. 1.66±0.28 ng/ml; p=0.009) compared to subjects with biphasic curves. Adiponection (3570±450 vs. 2350±440 ng/ml; p=0.089) and insulin secretion (4.31±0.52 vs. 2.89±0.53 µU dl/mg ml; p=0.089) tended to be lower in subjects with monophasic curves. The difference in CRP remained significant when BMI was included as a covariate (p=0.02). Obese adolescents with monophasic glucose response curves to OGTT have increased inflammation compared to subjects with biphasic curves. Longitudinal studies are needed to determine whether this early phase of glucose intolerance causes increased inflammation or whether early inflammation reduces insulin secretion and causes early glucose intolerance. Disclosure R. P. Hoffman: Consultant; Self; Provention Bio, Inc., Other Relationship; Self; Medscape, Research Support; Self; Provention Bio, Inc. R. Cazeau: None. L. Rauch: None. J. A. Bauer: None. Funding National Center for Research Resources (UL1RR05755)

These results indicate that differences in fat metabolism are present in both black and white obese adolescents. How these differences explain higher rates of cardiometabolic disease in blacks is unclear.