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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.
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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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After cellular or tissue damage, the resident stem cells present in the human body can locally repair and regenerate the damaged tissue or organ. However, even though some tissues do not have stem cells, they can repair and regenerate with the help of pre-existing cells. For example, beta cells of the pancreas and hepatocytes of the liver can divide to renew and regenerate the tissue. Here, both cell division and cell death are well regulated by homeostasis.
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For most patients, experiencing several weeks of polyuria, polydipsia, fatigue, and significant weight loss may indicate the presence of diabetes. Furthermore, adults displaying the phenotypic appearance of type 2 diabetes (particularly those who are obese and not initially insulin-requiring), may have islet cell autoantibodies, suggesting autoimmune-mediated β cell destruction and a diagnosis of latent autoimmune diabetes of adults (LADA). The categorization of glucose homeostasis is...
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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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Efficient Differentiation of Pluripotent Stem Cells to NKX6-1+ Pancreatic Progenitors
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Progenitor cell dysfunctions underlie some diabetic complications.

Melanie Rodrigues1, Victor W Wong1, Robert C Rennert1

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Diabetes disrupts stem cell functions crucial for tissue repair, impacting health even after blood sugar normalization. Understanding these stem cell defects is key for treating diabetic complications and improving cell therapies.

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Area of Science:

  • Stem cell biology
  • Diabetes research
  • Regenerative medicine

Background:

  • Stem cells and progenitor cells are vital for tissue homeostasis and repair.
  • Diabetes negatively impacts stem cell populations, affecting renewal, differentiation, and function.
  • These stem cell deficits persist post-normoglycemia, contributing to diabetic complications.

Purpose of the Study:

  • Analyze stem cell pathways dysregulated in diabetes.
  • Highlight the impact of hyperglycemic memory on stem cells.
  • Define strategies for stem cell therapy in managing diabetic complications.

Main Methods:

  • Literature review of preclinical and human studies on diabetes and stem cells.
  • Analysis of stem cell signaling pathways affected by hyperglycemia.
  • Evaluation of the role of hyperglycemic memory in stem cell dysfunction.

Main Results:

  • Diabetes impairs stem cell quiescence, renewal, differentiation, homing, and neovascularization.
  • Stem cell aberrations contribute to tissue dysfunction in diabetic complications.
  • Hyperglycemic memory exacerbates stem cell defects.

Conclusions:

  • Understanding diabetes-induced stem cell alterations is critical for unraveling diabetic pathophysiology.
  • Addressing stem cell deficiencies is essential for successful cell-based therapies.
  • Targeting stem cell pathways offers potential therapeutic avenues for diabetic complications.