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Related Concept Videos

Tissue Renewal without Stem Cells01:23

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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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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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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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CHD4 and NKX2.2 Cooperate to Regulate β-Cell Function by Repressing Non-β-Cell Gene Programs.

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Related Experiment Video

Updated: Dec 10, 2025

Surgical Injury to the Mouse Pancreas through Ligation of the Pancreatic Duct as a Model for Endocrine and Exocrine Reprogramming and Proliferation
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Pancreatic β cell regeneration: To β or not to β.

Michelle A Guney1, David S Lorberbaum1, Lori Sussel1

  • 1Barbara Davis Center for Diabetes, University of Colorado Anschutz Medical Center, Aurora CO 80045a.

Current Opinion in Physiology
|September 1, 2020
PubMed
Summary

Understanding how pancreatic beta cells regenerate is key to treating diabetes. This review covers three main ways beta cells can be regenerated: existing cell proliferation, new cell formation from stem cells, and cell type conversion.

Keywords:
DiabetesPancreatic isletbeta cell regenerationbeta cellsinsulin

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Area of Science:

  • Endocrinology
  • Cell Biology
  • Regenerative Medicine

Background:

  • Diabetes mellitus is a global health crisis caused by the loss or dysfunction of insulin-producing pancreatic beta cells.
  • Restoring functional beta cell mass is a primary therapeutic goal for diabetes treatment.

Purpose of the Study:

  • To review the current understanding of endogenous beta cell regeneration mechanisms.
  • To discuss the potential of these mechanisms for diabetes therapy.

Main Methods:

  • Review of in vivo mechanisms of beta cell regeneration.
  • Analysis of evidence and controversies in mice and humans.
  • Assessment of therapeutic prospects for diabetes.

Main Results:

  • Beta cell regeneration research focuses on three main in vivo mechanisms: proliferation of existing beta cells, neogenesis from ductal progenitors, and transdifferentiation of other cell types.
  • Evidence and controversies surrounding each mechanism in both mice and humans are discussed.

Conclusions:

  • Understanding beta cell regeneration pathways is crucial for developing new diabetes treatments.
  • Harnessing these endogenous regenerative capacities holds promise for restoring functional beta cell mass in diabetic patients.