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Homogeneous Time-resolved Förster Resonance Energy Transfer-based Assay for Detection of Insulin Secretion
Published on: May 10, 2018
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Relationship between insulin sensitivity and insulin secretion rate: not necessarily hyperbolic
S H Kim1, A Silvers2, J Viren2
1Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA.
Diabetic Medicine : a Journal of the British Diabetic Association
|December 17, 2015
Summary
The relationship between insulin sensitivity and secretion is not always hyperbolic. Direct measurements show a different relationship than indirect estimates, highlighting the impact of methodology on study outcomes.
Area of Science:
- Metabolic physiology
- Endocrinology
- Diabetes research
Background:
- The established hyperbolic relationship between insulin sensitivity and secretion is based on indirect measures.
- Previous studies relied on surrogate markers for insulin secretion, potentially influencing observed relationships.
Purpose of the Study:
- To investigate if a hyperbolic relationship between insulin sensitivity and secretion persists when using direct measurement techniques.
- To compare findings from direct measurements with those derived from indirect estimations.
Main Methods:
- Insulin sensitivity was quantified using steady-state plasma glucose (SSPG) from the insulin suppression test.
- Insulin secretion rate was directly measured using the graded-glucose infusion test.
- Indirect measures from oral glucose tolerance tests (OGTT) were used for comparison.
Main Results:
- Indirect OGTT measures confirmed the expected hyperbolic relationship (β ≈ -1).
- Direct measurements of insulin sensitivity and secretion rate did not yield a hyperbolic relationship (β ≈ -1.97).
Conclusions:
- The physiological relationship between insulin sensitivity and secretion is method-dependent.
- Direct measurement reveals a non-hyperbolic relationship, challenging previous conclusions based on surrogate markers.
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