Significance of plasma C-peptide in obese African American adolescents.

Journal of the National Medical Association
Gregory V WilliamsWolali Odonkor

Abstract

C-peptide blood levels can indicate whether or not a person is producing insulin and roughly how much. C-peptide is secreted as a byproduct of the biosynthesis of insulin from proinsulin. C-peptide has proposed biological activity and a well-established diagnostic value. The significance of C-peptide concentration in the plasma and urine in the pediatric population needs further delineation. To determine the significance of plasma C-peptide in obese African American adolescents with mild insulin resistance but no evidence of diabetes. This study included 19 African American adolescents with body mass index (BMI) in at least the 85th percentile evaluated with anthropometric measurements, Homeostatic Model Assessment-Insulin Resistance (HOMA-IR) score, and oral glucose tolerance test (OGTT), and 24-hour urine collections. The study also included an age-matched control group of 15 healthy African American adolescent controls and were not subjected for OGTT. The correlation among BMI, fasting plasma C-peptide concentrations, and 24-hour-urine C-peptide concentrations was calculated. T Tests were conducted to compare plasma C-peptide and 24-hour-urine C-peptide concentrations for the test group and controls. Mean HOMA score (3.96 +/...Continue Reading

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