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Related Concept Videos

Glucose Homeostasis: Pancreatic Islets and Insulin Secretion01:27

Glucose Homeostasis: Pancreatic Islets and Insulin Secretion

The pancreatic islets comprising only 1%-2% of the volume are highly vascularized and innervated mini-organs. They contain five endocrine cell types, including β cells that secrete insulin, which is synthesized as a single polypeptide chain, preproinsulin, processed to proinsulin, and finally to insulin and C-peptide. This process is complex and regulated, involving the Golgi complex, the endoplasmic reticulum, and the secretory granules of the β cell.
Insulin and C-peptide are co-secreted in...
Insulin Secretory Vesicles01:05

Insulin Secretory Vesicles

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...
Insulin: Biosynthesis, Chemistry, and Preparation01:25

Insulin: Biosynthesis, Chemistry, and Preparation

The endoplasmic reticulum (ER) of pancreatic β-cells synthesizes preproinsulin, which consists of a signal peptide, A and B chains, and a C-peptide. Preproinsulin is then cleaved and folded into proinsulin, which translocates to the Golgi apparatus for sorting and packaging into secretory granules. In these granules, enzymatic clipping generates insulin and C-peptide.
Damage or functional impairment of β-cells inhibits insulin production, leading to diabetes. Diabetes treatment primarily uses...
Hormones Regulating Blood Glucose01:16

Hormones Regulating Blood Glucose

Insulin is released by beta cells of the pancreas when blood glucose levels are high. It facilitates glucose absorption and utilization in insulin-dependent cells with insulin receptors on their plasma membranes. Insulin promotes glucose uptake by increasing the number of glucose transport proteins in the cell membrane, allowing glucose to enter the cell. As a result, glucose utilization and ATP production are enhanced.
In addition to accelerating glucose uptake and utilization, insulin has...
Type I Diabetes II: Pathophysiology01:26

Type I Diabetes II: Pathophysiology

Type 1 diabetes mellitus arises from an immune-mediated destruction of pancreatic β-cells, resulting in an absolute deficiency of insulin. This process develops in genetically susceptible individuals when autoimmunity, environmental exposures, and immunologic dysregulation converge to trigger a targeted attack on the insulin-producing cells of the pancreas. The β-cells are located within the islets of Langerhans and are essential for regulating blood glucose by facilitating cellular uptake of...

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Updated: May 29, 2026

A High-content In Vitro Pancreatic Islet β-cell Replication Discovery Platform
09:35

A High-content In Vitro Pancreatic Islet β-cell Replication Discovery Platform

Published on: July 16, 2016

Nutritional programming of pancreatic β-cell plasticity.

David J Hill1

  • 1David J Hill, Department of Medicine, Physiology and Pharmacology, and Paediatrics, University of Western Ontario, London, Ontario N6A 5B8, Canada.

World Journal of Diabetes
|September 29, 2011
PubMed
Summary

Maternal nutritional insufficiency impairs offspring pancreatic beta-cell regeneration, increasing type 2 diabetes risk. However, statin treatment in animal models shows potential for reversing this impairment by promoting islet angiogenesis and beta-cell mass.

Keywords:
DiabetesIsletNutritionPlasticityStatinβ-cell

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Area of Science:

  • Endocrinology
  • Developmental Biology
  • Metabolic Syndrome

Background:

  • Nutritional insufficiency during pregnancy alters offspring metabolism, increasing type 2 diabetes risk.
  • This involves impaired pancreatic beta-cell function, morphology, and islet vascularization.
  • Offspring beta-cells have regenerative potential via progenitors and neogenesis, influenced by bone marrow-derived stem cells and angiogenesis.

Purpose of the Study:

  • To investigate the impact of early-life nutritional insults on beta-cell regenerative capacity.
  • To explore potential therapeutic strategies, such as statin treatment, to reverse impaired beta-cell phenotypes.

Main Methods:

  • Utilized animal models fed a low protein diet during pregnancy to induce nutritional insult.
  • Assessed beta-cell regeneration, islet neogenesis, angiogenesis, and vascular function.
  • Investigated the effects of statin treatment on these parameters in offspring.

Main Results:

  • Nutritional insults impaired beta-cell differentiation from progenitors and altered microvascular signals.
  • Reduced endothelial progenitor cells and angiogenesis were observed in offspring from nutritionally challenged pregnancies.
  • Statin treatment in animal models promoted islet angiogenesis, improved vascular function, and increased beta-cell mass.

Conclusions:

  • Early-life nutritional insults significantly hinder the regenerative capacity of pancreatic beta-cells.
  • Therapeutic interventions, like statins, may offer a strategy to restore beta-cell function and mass following such insults.
  • Understanding these mechanisms is crucial for preventing type 2 diabetes in at-risk populations.