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Related Concept Videos

Type II Diabetes II: Pathophysiology01:24

Type II Diabetes II: Pathophysiology

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PathophysiologyType 2 diabetes mellitus (T2DM ) is a chronic metabolic disorder characterized by insulin resistance and progressive pancreatic β-cell dysfunction, leading to impaired glucose homeostasis. It results from interactions among genetic predisposition, environmental factors, and metabolic stressors, such as overnutrition and a sedentary lifestyle.Insulin Resistance and Glucose DysregulationEarly T2DM involves insulin resistance in skeletal muscle, adipose tissue, and the liver.
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Type II Diabetes I: Introduction01:26

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Type 2 diabetes mellitus (T2DM) is a chronic metabolic disorder characterized by insulin resistance, in which target tissues such as the liver, muscle, and adipose tissue respond poorly to insulin. It is also associated with inadequate compensatory insulin secretion, where pancreatic β-cells fail to produce sufficient insulin. Together, these abnormalities lead to persistent hyperglycemia.EtiologyT2DM develops through a complex interaction of genetic predisposition and environmental or...
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Diabetes Mellitus: Introduction01:26

Diabetes Mellitus: Introduction

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Diabetes mellitus consists of chronic metabolic disorders characterized by persistent hyperglycemia. This elevated blood glucose results from defects in insulin secretion, impaired insulin action, or both. Insulin, produced by pancreatic β-cells, is essential for maintaining glucose homeostasis by facilitating cellular glucose uptake for energy or storage. Disruptions in insulin production or function lead to glucose accumulation in the bloodstream, causing the clinical features and...
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Mitochondria01:37

Mitochondria

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Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
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Pathophysiology of Diabetes01:20

Pathophysiology of Diabetes

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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.
Type 1 diabetes is characterized by autoimmune-mediated destruction of pancreatic β cells, with environmental factors potentially triggering this process in genetically susceptible individuals. Despite many not having a family history, certain genes increase susceptibility,...
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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...
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Related Experiment Video

Updated: Apr 21, 2026

Phosphorus-31 Magnetic Resonance Spectroscopy: A Tool for Measuring In Vivo Mitochondrial Oxidative Phosphorylation Capacity in Human Skeletal Muscle
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Mitochondrial dysfunction and insulin resistance: an update.

Magdalene K Montgomery1, Nigel Turner2

  • 1Department of PharmacologyUNSW Medicine, School of Medical Sciences, University of New South Wales, Kensington, Sydney, New South Wales 2052, Australia m.montgomery@unsw.edu.au.

Endocrine Connections
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PubMed
Summary
This summary is machine-generated.

Mitochondrial dysfunction

Keywords:
insulin resistancelipid accumulationmitochondrial dynamicsmitochondrial functionmitophagyoxidative stress

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Area of Science:

  • Metabolic disorders and cellular energetics.

Background:

  • Mitochondrial dysfunction is linked to insulin resistance (IR), but studies show conflicting results.
  • The causal relationship between mitochondrial function and IR remains unclear after decades of research.

Purpose of the Study:

  • To review the evidence on mitochondrial dysfunction's role in insulin resistance.
  • To explore whether mitochondrial changes cause or are a consequence of IR.
  • To discuss mitochondria as a therapeutic target for IR.

Main Methods:

  • Comprehensive literature review of human and rodent studies.
  • Analysis of genetic manipulation studies affecting mitochondrial function.
  • Synthesis of evidence from association and intervention studies.

Main Results:

  • Contrasting findings exist regarding mitochondrial dysfunction and IR across studies.
  • Evidence suggests a complex interplay, but direct causality is debated.
  • Rodent models provide insights but may not fully translate to humans.

Conclusions:

  • The direct role of mitochondrial dysfunction in causing IR is still debated.
  • Further research is needed to clarify the cause-and-effect relationship.
  • Mitochondria represent a potential therapeutic target for treating insulin resistance.