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Updated: Jun 1, 2026

Homogeneous Time-resolved Förster Resonance Energy Transfer-based Assay for Detection of Insulin Secretion
Published on: May 10, 2018
[Immunoassays for the incretin hormones GIP and GLP-1]
1Division of Diabetes, Clinical Nutrition and Endocrinology, Department of Internal Medicine, Kansai Electric Power Hospital.
Abstract:
Immunoassays for incretin hormones, GLP-1 and GIP are critical to study their secretion and DPP-4-processing in vivo, as well as to evaluate therapeutic efficacies of current and future incretin-based drugs in patients with diabetes. However, large variability in levels of incretins, especially intact GLP-1, determined by various immunoassays hampers our understanding of the incretin biology. Recent studies have revealed an importance of an ethanol or solid-phase extraction prior to immunoassays for intact GLP-1. The extraction removes interferences with unknown identity from plasma to obtain results less variable among different subjects. The extraction improves correlation across the different immunoassays for intact GLP-1. Here, we summarize current knowledge and potential problems regarding immunoassays for GLP-1 and GIP.
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