PMID- 18309686 OWN - NLM STAT- MEDLINE DCOM- 20080507 LR - 20211020 IS - 1226-3303 (Print) IS - 2005-6648 (Electronic) IS - 1226-3303 (Linking) VI - 22 IP - 4 DP - 2007 Dec TI - Differences in insulin sensitivity and secretory capacity based on OGTT in subjects with impaired glucose regulation. PG - 270-4 AB - BACKGROUND: This study examined whether defects in insulin secretion contribute to the development and progression of type 2 diabetes mellitus (T2DM). METHODS: Plasma insulin and glucose were measured after a glucose tolerance test to calculate the insulinogenic index (IGI) and the HOMA-IR Homeostasis model assessment of insulin resistance in subjects with normal glucose tolerance (NGT), prediabetes (preDM, n = 49), and T2DM patients with disease duration < 1 year (n = 84), 1 approximately 5 years (n = 45), or > 5 years (n = 37). Plasma proinsulin and adiponectin levels were also measured as a parameter of insulin secretion and resistance. RESULTS: The mean HOMA-IR increased and the adiponectin levels decreased relative to the deterioration of glucose tolerance in NGT and preDM subjects. However, differences in the HOMA-IR were not related to disease duration in T2DM subjects. The mean IGI was similar in NGT and preDM subjects, but there were significant deteriorations in IGI relative to the duration of diabetes. CONCLUSIONS: Defects in both insulin sensitivity and insulin secretion contribute to T2DM, but decreased insulin secretion may be more important in the development and progression of T2DM. FAU - Rhee, Sang Youl AU - Rhee SY AD - Department of Endocrinology and Metabolism, Kyung Hee University School of Medicine, Seoul, Korea. FAU - Kwon, Mi Kwang AU - Kwon MK FAU - Park, Byong-Jo AU - Park BJ FAU - Chon, Suk AU - Chon S FAU - Jeong, In-Kyung AU - Jeong IK FAU - Oh, Seungjoon AU - Oh S FAU - Ahn, Kyu Jeung AU - Ahn KJ FAU - Chung, Ho Yeon AU - Chung HY FAU - Kim, Sung Woon AU - Kim SW FAU - Kim, Jin-Woo AU - Kim JW FAU - Kim, Young Seol AU - Kim YS FAU - Woo, Jeong-Taek AU - Woo JT LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Korea (South) TA - Korean J Intern Med JT - The Korean journal of internal medicine JID - 8712418 RN - 0 (Insulin) SB - IM MH - Diabetes Mellitus, Type 2/*physiopathology MH - Disease Outbreaks MH - Female MH - *Glucose Tolerance Test MH - Health Status Indicators MH - Humans MH - Insulin/*metabolism MH - *Insulin Resistance MH - Insulin Secretion MH - Male MH - Middle Aged PMC - PMC2687668 EDAT- 2008/03/04 09:00 MHDA- 2008/05/08 09:00 PMCR- 2007/12/01 CRDT- 2008/03/04 09:00 PHST- 2008/03/04 09:00 [pubmed] PHST- 2008/05/08 09:00 [medline] PHST- 2008/03/04 09:00 [entrez] PHST- 2007/12/01 00:00 [pmc-release] AID - 10.3904/kjim.2007.22.4.270 [doi] PST - ppublish SO - Korean J Intern Med. 2007 Dec;22(4):270-4. doi: 10.3904/kjim.2007.22.4.270.