{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T11:16:39Z","timestamp":1790680599498,"version":"4.1.0"},"reference-count":70,"publisher":"American Academy of Pediatrics (AAP)","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2001,4,1]]},"abstract":"<jats:sec>\n                  <jats:title>Objectives.<\/jats:title>\n                  <jats:p>The prevalence of type 2 diabetes in American adolescents has increased markedly during the past generation. Although the factors that contribute to the development of type 2 diabetes are complex and not wholly elucidated, the triad of severe obesity, hyperinsulinemia, and a family history of type 2 diabetes places a child at an increased risk for development of the disease. Current approaches to the prevention of type 2 diabetes, including dietary counseling and exercise, have had limited success. We reasoned that drugs that increase glucose tolerance in diabetic patients might prove useful in preventing the progression to glucose intolerance in high-risk patients. To that end, we conducted a double-blind, placebo-controlled study of the effects of metformin on body mass index (BMI), serum leptin, glucose tolerance, and serum lipids in obese adolescents with fasting hyperinsulinemia and a family history of type 2 diabetes.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods.<\/jats:title>\n                  <jats:p>The study population consisted of 29 white and black adolescents aged 12 to 19 years. All had BMIs exceeding 30 kg\/m2. Criteria for enrollment included: 1) a fasting insulin concentration exceeding 15 \u03bcU\/mL; and 2) at least 1 first- or second-degree relative with type 2 diabetes. All patients had fasting plasma glucose concentrations &amp;lt;110 mg% and hemoglobin A1c concentrations \u22646.0%. All had normal linear growth and sexual development for age, with no marked hirsutism, severe acne, or menstrual irregularities characteristic of polycystic ovary syndrome. Eight participants had acanthosis nigricans. After baseline laboratory studies including a rapidly sampled intravenous glucose tolerance test, patients were randomized to receive metformin (500 mg twice daily) or a placebo for a total of 6 months. The effects of metformin on BMI standard deviation score, serum leptin, glucose tolerance, and serum lipids were analyzed. The study was double-blinded and included no specific dietary restrictions.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results.<\/jats:title>\n                  <jats:p>Metformin caused a decline of 0.12 standard deviation in BMI in study participants (\u22121.3% from baseline), and a 5.5% reduction in serum leptin in girls. In contrast, BMI and serum leptin rose 0.23 standard deviation (2.3%) and 16.2%, respectively, in the placebo group during the treatment period. Metformin caused a progressive decline in fasting blood glucose (from a mean of 84.9 to 75.1 mg%) and a reduction in fasting insulin levels (from 31.3 to 19.3 \u03bcU\/mL). In contrast, fasting glucose levels in the placebo group rose slightly from 77.2 to 82.3 mg%, and fasting insulin levels did not change. Insulin sensitivity, as assessed by the ratio of fasting insulin to glucose concentrations and the quantitative insulin sensitivity check index (1\/[log fasting insulin + log fasting glucose]) and homeostasis model assessment insulin resistance index (fasting insulin \u00d7 fasting glucose\/22.5) indices, increased slightly in the metformin-treated participants. However, the insulin sensitivity measured using Bergman's minimal model did not change. There were also no significant changes in glucose effectiveness, hemoglobin A1c, serum lipids, or serum lactate in the metformin or placebo groups. Metformin was tolerated well by the majority of patients. Transient abdominal discomfort or diarrhea occurred in 40% of treated participants; there were no episodes of vomiting or lactic acidosis.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusions.<\/jats:title>\n                  <jats:p>The treatment of obesity and insulin resistance in adults often proves ineffective because the vicious cycle leading to type 2 diabetes may have become entrenched and, to some extent, may be irreversible. Early detection and therapy of the obese adolescent with a family history of type 2 diabetes may interrupt the cycle of weight gain and insulin resistance that leads to glucose intolerance in adulthood. Through its ability to reduce fasting blood glucose and insulin concentrations and to moderate weight gain, metformin might complement the effects of dietary and exercise counseling and reduce the risk of type 2 diabetes in selected patients.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1542\/peds.107.4.e55","type":"journal-article","created":{"date-parts":[[2004,8,13]],"date-time":"2004-08-13T23:55:51Z","timestamp":1092441351000},"page":"e55-e55","source":"Crossref","is-referenced-by-count":320,"title":["The Effects of Metformin on Body Mass Index and Glucose Tolerance  in Obese Adolescents With Fasting Hyperinsulinemia and a  Family History of Type 2 Diabetes"],"prefix":"10.1542","volume":"107","author":[{"given":"Michael","family":"Freemark","sequence":"first","affiliation":[{"name":"From the Departments of Pediatrics and"},{"name":"Cell Biology, Duke University Medical Center, Durham North 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