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Related Concept Videos

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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Diabetes Mellitus: Overview and Type I Subtype01:22

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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 mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
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Type 2 diabetes, characterized by insulin resistance, arises when the insulin receptors on cells lose responsiveness to insulin, diminishing the cell's capacity to take up glucose, resulting in elevated blood glucose levels. To receive a diagnosis of Type 2 diabetes, a series of blood glucose tests are necessary to assess whether the blood glucose falls within normal parameters. If the result is out of the normal range, a patient may be diagnosed as prediabetic or diabetic, depending on the...
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A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...
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Mitochondrial dysfunction in diabetic tubulopathy.

Lan Yao1, Xianhui Liang1, Yingjin Qiao1

  • 1Blood Purification Center & Department of Nephrology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Research Institute of Nephrology, Zhengzhou University, Zhengzhou 450052, China.

Metabolism: Clinical and Experimental
|March 31, 2022
PubMed
Summary

Diabetic kidney disease damages renal tubules, impairing mitochondria. This review explores mitochondrial dysfunction in early diabetic tubulopathy and potential therapies for kidney disease.

Keywords:
Diabetic kidney diseaseDiabetic tubulopathyMitochondrial dysfunctionRenal proximal tubule injury

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Area of Science:

  • Nephrology
  • Endocrinology
  • Mitochondrial Biology

Background:

  • Diabetic kidney disease (DKD) is a major complication of diabetes.
  • Focus is shifting from glomerular to tubular damage (diabetic tubulopathy).
  • Proximal tubules, with high energy demands, are susceptible to mitochondrial dysfunction.

Purpose of the Study:

  • To review the role of mitochondrial dysfunction in early diabetic tubulopathy.
  • To explore the mechanisms linking diabetes to tubular mitochondrial damage.
  • To discuss potential therapeutic strategies targeting mitochondria in DKD.

Main Methods:

  • Literature review of current research on DKD and mitochondrial function.
  • Analysis of studies investigating diabetes-induced mitochondrial dysfunction in renal tubules.
  • Synthesis of findings on metabolic abnormalities and biomarkers.

Main Results:

  • Diabetes directly damages renal tubules, causing mitochondrial dysfunction.
  • Key issues include impaired bioenergetics, increased mitochondrial ROS, and altered mitophagy.
  • These dysfunctions contribute to tubular atrophy and interstitial fibrosis.

Conclusions:

  • Mitochondrial dysfunction is a key factor in early diabetic tubulopathy.
  • Understanding these mechanisms may reveal new biomarkers for DKD.
  • Targeting mitochondrial pathways offers potential therapeutic avenues for DKD.