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Related Concept Videos

Psychoneuroimmunology: Diabetes and Cancer01:19

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Chronic stress has been linked to both the onset and progression of serious health conditions, including Type 2 diabetes and cancer. Type 2 diabetes, a widespread chronic illness, is closely associated with obesity and insulin resistance, both of which often worsen under stress. Studies indicate that men experiencing high levels of chronic stress face a 45% higher risk of developing diabetes compared to those with minimal stress. Stress triggers physiological responses that elevate blood...
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Diabetes mellitus is a chronic metabolic disorder characterized by high blood glucose levels due to inadequate insulin production, insulin resistance, or both. The condition affects millions worldwide and can significantly impact their health and quality of life.
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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.
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Diabetes mellitus is a chronic metabolic disorder characterized by hyperglycemia. The four categories of diabetes are type 1 diabetes, type 2 diabetes, other specific types of diabetes, and gestational diabetes.
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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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Βeta-Cells: Stress, Identity, Failure and Diabetes.

Yousun An1,2, Nicholas Norris1,2, Donglai Li1,2

  • 1Centre for Diabetes, Obesity and Endocrinology, Westmead Institute for Medical Research, University of Sydney, Westmead, NSW 2145, Australia.

Cells
|March 14, 2026
PubMed
Summary
This summary is machine-generated.

Type 2 diabetes (T2D) arises from lifestyle factors that impair pancreatic beta-cell function, leading to disrupted glucose control. This review details the cellular mechanisms behind beta-cell failure, crucial for developing targeted T2D prevention strategies.

Keywords:
ER stressUPRdedifferentiationinsulinmetabolic stressobesitypancreatic β-cellstype 2 diabetes

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Area of Science:

  • Endocrinology and Metabolism
  • Cell Biology
  • Diabetes Research

Background:

  • Type 2 diabetes (T2D) is a global health crisis linked to modern lifestyles.
  • Pancreatic beta-cell (β-cell) dysfunction is central to T2D pathogenesis, disrupting glucose homeostasis.
  • β-cells initially compensate for insulin resistance but eventually fail under chronic metabolic stress.

Purpose of the Study:

  • To review the molecular and cellular mechanisms driving pancreatic β-cell failure in T2D.
  • To highlight the roles of endoplasmic reticulum stress, mitochondrial dysfunction, and inflammation.
  • To explore changes in β-cell identity and the islet microenvironment.

Main Methods:

  • Literature review of molecular and cellular pathways involved in β-cell failure.
  • Analysis of factors contributing to chronic metabolic stress.
  • Examination of changes in β-cell function, identity, and intercellular communication.

Main Results:

  • Chronic nutrient overload, ER stress, and inflammation compromise β-cell function and survival.
  • Mitochondrial dysfunction exacerbates metabolic stress and β-cell failure.
  • Loss of β-cell identity and altered islet microenvironment interactions contribute to disease progression.

Conclusions:

  • Understanding the drivers of β-cell failure is key to preventing T2D.
  • Targeting cellular stress pathways and preserving β-cell function are essential for metabolic health.
  • Further research into β-cell biology can inform novel therapeutic strategies for T2D.