PT  - JOURNAL ARTICLE
AU  - Wang, Xiao-Li
AU  - Ye, Fang
AU  - Li, Jun
AU  - Zhu, Ling-Yun
AU  - Feng, Gang
AU  - Chang, Xiang-Yun
AU  - Sun, Kan
TI  - Impaired secretion of glucagon-like peptide 1 during oral glucose tolerance test in patients with newly diagnosed type 2 diabetes mellitus
AID  - 10.15537/smj.2016.1.12035
DP  - 2016 Jan 01
TA  - Saudi Medical Journal
PG  - 48--54
VI  - 37
IP  - 1
4099  - http://smj.org.sa/content/37/1/48.short
4100  - http://smj.org.sa/content/37/1/48.full
SO  - Saudi Med J2016 Jan 01; 37
AB  - Objectives: To assess glucagon-like peptide 1 (GLP-1) secretion after oral glucose tolerance tests (OGTTs) in subjects with newly diagnosed type 2 diabetes mellitus (T2DM), impaired glucose tolerance (IGT), and normal glucose tolerance (NGT) to clarify changes in GLP-1 secretion during the course of T2DM.Methods: In this cross sectional study, 80 subjects were divided into the NGT, IGT, and T2DM groups after undergoing a 75 g OGTT from March to December 2014 at the School of Medicine, First Affiliated Hospital, Shihezi University, Xinjiang, China. Plasma total GLP-1 was measured at 0, 30, 60, 120, and 180 minutes. Homeostasis model assessment of insulin resistance (HOMA-IR), islet β-cell function (HOMA-β), Gutt index, Matsuda index, incremental GLP-1 (ΔGLP-1), and areas under the curves of GLP-1 (AUCglp-1), glucose (AUCg), and insulin (AUCins) were calculated.Results: Plasma total GLP-1 at 30-120 minutes and ΔGLP-1 at 30-120 minutes were lower in the T2DM group than in the IGT and NGT groups (p<0.05). Peak GLP-1 levels were 35% lower in the T2DM group than in the NGT group. Plasma total GLP-1, ΔGLP-1, and AUCglp-1 correlated negatively with HOMA-IR and AUCg, and positively with HOMA-β, Gutt index, Matsuda index, and AUCins (p<0.05).Conclusion: The GLP-1 secretion after 75 g OGTT was impaired in newly diagnosed T2DM patients, inversely proportional to IR and hyperglycemia, and positively correlated with β-cell function and insulin sensitivity.