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Updated: May 20, 2026

Hyperinsulinemic-euglycemic Clamps in Conscious, Unrestrained Mice
Published on: November 16, 2011
[Different prevalence of impaired glucose tolerance between hyperinsulinemic and normoinsulinemic subjects]
Jing Xiao1, Hui Tian, Chun-lin Li
1Department of Geriatric Endocrinology, Chinese PLA General Hospital, Beijing 100853, China.
Objective:
To study the impact of different insulin levels on the conversion from impaired glucose tolerance (IGT) to type 2 diabetes mellitus (T2DM), through analysis of different glycometabolism condition among quinquagenarian population.
Methods:
Subjects enrolled were Beijing habitants who received annual physical examination [including oral glucose tolerance test (OGTT)] in the Chinese PLA General Hospital from 2005 - 2007. According to the OGTT results, the subjects were divided into three groups, including normal glucose tolerance-non-hyperinsulinemia group (NGT-NHIns), IGT-hyperinsulinemia group (IGT-HIns) and IGT-non-hyperinsulinemia group (IGT-NHINS). The prognosis between the year 2009 and 2010 of the three groups was observed. Hyperinsulinemia was diagnosed with fasting serum insulin ≥ 15 mU/L and/or 2-hour serum insulin ≥ 80 mU/L after glucose loading.
Results:
The rate of case number of conversion to T2DM in IGT-NHIns group (42/133) was higher than that in IGT-HIns group (24/154) or NGT-NHIns group (12/126). The HOMA insulin resistance index (HOMA-IR) of individuals with IGT-NHIns was lower than that of IGT-HIns [0.96 (0.40, 3.53) vs 2.04 (0.59, 23.20), P < 0.05], while whole body insulin sensitivity index (WBISI) was higher than that of IGT-HIns [7.48 (3.20, 31.35) vs 3.28 (0.86, 7.67), P < 0.05]. Modified β-cell function index (MBCI) and insulin secretion index (ISI) in IGT-NHIns was poorer than that of IGT-HIns respectively [2.57 (0.58, 10.98) vs 5.17 (1.04, 65.09); 7.66 (0.99, 28.40) vs 17.56 (4.18, 96.46), all P values < 0.01].
Conclusions:
The risk of IGT-NHIns progressing into T2DM is higher than that of IGT-HIns. For the prevention of T2DM, individuals with IGT-NHIns should be paid more attention than keeping an eye on IGT-HIns patients. Early control of risk factors could protect β cell function and prevent the progression to T2DM.
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