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Insulin secretory vesicles release insulin to stimulate blood glucose uptake and regulate carbohydrate metabolism. When the blood glucose levels increase, glucose enters the pancreatic β-islet cells through glucose transporters. Once inside, glucose is metabolized through glycolysis, the citric acid cycle, and the electron transport chain, producing ATP. This increase in ATP concentration closes ATP-sensitive potassium channels, leading to depolarization of the membrane and the opening of...

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Insulin: The Receptor and Signaling Pathways

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Related Experiment Video

Updated: Jul 12, 2026

Live Images of GLUT4 Protein Trafficking in Mouse Primary Hypothalamic Neurons Using Deconvolution Microscopy

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Aging and insulin secretion

M C Coordt¹, R C Ruhe, R B McDonald

¹Department of Nutrition, University of California, Davis 95616, USA.

Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.)

|July 1, 1995

Summary

Biological aging, independent of disease, may not directly impair insulin secretion. Studies suggest other factors like obesity and activity levels are more influential in changes to glucose homeostasis.

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Last Updated: Jul 12, 2026

Live Images of GLUT4 Protein Trafficking in Mouse Primary Hypothalamic Neurons Using Deconvolution Microscopy

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Published on: December 7, 2017

Homogeneous Time-resolved Förster Resonance Energy Transfer-based Assay for Detection of Insulin Secretion

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Differentiated Mouse Adipocytes in Primary Culture: A Model of Insulin Resistance

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Published on: February 17, 2023

Area of Science:

Endocrinology
Gerontology
Metabolic Health

Background:

Aging is commonly linked to reduced insulin secretion and impaired glucose homeostasis.
Recent research indicates disease, obesity, and physical activity are stronger correlates of diminished insulin secretion than aging itself.

Purpose of the Study:

To review recent studies on how biological aging, distinct from disease states like type II diabetes, impacts insulin secretion.
To explore age-related changes in the hormonal and neural regulation of insulin secretion.

Main Methods:

In vivo and in vitro assessments of insulin secretion in aging mammals.
Review of literature on hormonal and neural regulatory mechanisms affecting insulin secretion with age.

Main Results:

Distinguishes the effects of aging per se from those of disease and lifestyle factors on insulin secretion.
Highlights potential age-related alterations in hormonal and neural control of insulin secretion.

Conclusions:

Biological aging may not be the primary driver of decreased insulin secretion.
Functional heterogeneity within beta-cell populations might enable the pancreas to maintain insulin secretion during aging.