PMID- 20929509 OWN - NLM STAT- MEDLINE DCOM- 20110203 LR - 20221207 IS - 1753-0407 (Electronic) IS - 1753-0407 (Linking) VI - 1 IP - 2 DP - 2009 Jun TI - Serum retinol-binding protein 4 is associated with insulin secretion in Chinese people with normal glucose tolerance. PG - 125-30 LID - 10.1111/j.1753-0407.2009.00024.x [doi] AB - BACKGROUND: Serum levels of retinol-binding protein 4 (RBP4) are associated with insulin resistance and type 2 diabetes mellitus (T2DM) and may impact on beta-cell function. Thus, the present study investigated the relationship between serum RBP4 and insulin secretion in Chinese people with and without T2DM. METHODS: A 75 g oral glucose tolerance test was administered to all 867 subjects and serum RBP4 concentrations were determined. Insulin secretion was assessed by DeltaI/DeltaG (increment in plasma insulin concentration/plasma glucose concentration 30 min after the oral administration of 75 g glucose) and the total area under the curve for insulin over 180 min (AUC-I). Magnetic resonance imaging was used to measure visceral fat area (VFA) at L4-L5; subjects with VFA >/=80 cm(2) were considered to have visceral obesity (VO). RESULTS: Serum RBP4 concentrations were significantly higher in subjects with VO than without, regardless of the presence of T2DM. In addition, in the entire group with normal glucose tolerance (NGT), serum RBP4 was positively correlated with DeltaI/DeltaG (r = 0.152; P < 0.01) and AUC-I (r = 0.218; P < 0.01) after adjustment for gender. The correlation between RBP4 and DeltaI/DeltaG (r = 0.162; P < 0.05) and AUC-I (r = 0.195; P < 0.01) remained in NGT non-VO subjects. No correlation was found between serum RBP4 and DeltaI/DeltaG or AUC-I in T2DM patients. Stepwise multiple regression analysis showed that serum RBP4 is an independent factor that contributes to DeltaI/DeltaG (beta = 0.176) and AUC-I (beta = 0.204) in NGT non-VO subjects. CONCLUSIONS: Serum RBP4 is correlated with glucose-stimulated insulin secretion in NGT non-VO subjects, but not in NGT VO subjects and T2DM patients. FAU - Li, Ling AU - Li L AD - Department of Endocrinology and Metabolism, Shanghai Jiaotong University Affiliated Sixth People's Hospital. FAU - Wang, Chen AU - Wang C FAU - Bao, Yuqian AU - Bao Y FAU - Wu, Haiya AU - Wu H FAU - Lu, Junxi AU - Lu J FAU - Xiang, Kunsan AU - Xiang K FAU - Jia, Weiping AU - Jia W LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Australia TA - J Diabetes JT - Journal of diabetes JID - 101504326 RN - 0 (Insulin) RN - 0 (RBP4 protein, human) RN - 0 (Retinol-Binding Proteins, Plasma) SB - IM MH - Adolescent MH - Adult MH - Aged MH - Aged, 80 and over MH - Asian People MH - Diabetes Mellitus, Type 2/metabolism MH - Female MH - Glucose Intolerance MH - Glucose Tolerance Test MH - Humans MH - Insulin/*blood MH - Insulin Resistance/physiology MH - Intra-Abdominal Fat MH - Male MH - Middle Aged MH - Retinol-Binding Proteins, Plasma/*metabolism EDAT- 2009/06/01 00:00 MHDA- 2011/02/04 06:00 CRDT- 2010/10/09 06:00 PHST- 2010/10/09 06:00 [entrez] PHST- 2009/06/01 00:00 [pubmed] PHST- 2011/02/04 06:00 [medline] AID - JDB024 [pii] AID - 10.1111/j.1753-0407.2009.00024.x [doi] PST - ppublish SO - J Diabetes. 2009 Jun;1(2):125-30. doi: 10.1111/j.1753-0407.2009.00024.x.