Serum Triglyceride Levels Correlated with the Rate of Change in Insulin Secretion Over Two Years in Prediabetic SubjectsShimodaira M.a, b · Niwa T.a · Nakajima K.a · Kobayashi M.a · Hanyu N.a · Nakayama T.b
aDepartment of Internal Medicine, Iida Municipal Hospital, Nagano, and bDivision of Laboratory Medicine, Department of Pathology and Microbiology, Nihon University School of Medicine, Tokyo, Japan
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Article / Publication Details
Background/Aims: Increased triglyceride (TG) and decreased high-density lipoprotein cholesterol (HDL-C) levels are considered risk factors for diabetes among prediabetic subjects. In this study, we retrospectively investigated the relationship between lipid profiles and the rate of change in early-phase insulin secretion in prediabetic subjects. Methods: To evaluate insulin secretion, 50 prediabetic subjects underwent a 75-gram oral glucose tolerance test at the beginning of the study (baseline), and they were reexamined after a 2-year interval. The results were expressed as insulinogenic index (IGI) and disposition index (DI). Results: The lipid profiles and indices of insulin secretion had not significantly changed over 2 years. However, Pearson's correlation analyses indicated that the rate of change in IGI and DI was negatively correlated with log-transformed baseline TG level, but not with baseline HDL-C level. Multiple linear regression analysis confirmed that the rate of change in IGI and DI was negatively correlated with the log-transformed baseline TG level (β = -0.38, p = 0.006, and β = -0.39, p = 0.006, respectively). Conclusions: Baseline TG level of prediabetic subjects appeared to be associated with rate of change in IGI and DI over a 2-year period, indicating that TG levels among prediabetic subjects should be carefully monitored.
© 2014 S. Karger AG, Basel
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