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Related Concept Videos

Tissue Renewal without Stem Cells01:23

Tissue Renewal without Stem Cells

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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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Regeneration and repair processes are critical in healing damages caused by injury, disease, and aging. In regeneration, the damaged tissue is entirely replaced with new growth that restores the original architecture and function. In contrast, tissue repair usually results in a fixed tissue architecture involving scar formation. Scars generally do not reestablish tissue function and may also exhibit structural abnormalities at the injury site.
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The liver is an important organ in vertebrates that plays an essential role in metabolism. It is also responsible for storing and redistributing nutrients such as carbohydrates, fats, and vitamins in the body. Additionally, the liver releases bile salts which are critical for digesting food and eliminating toxic metabolites from the body.
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Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
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Regeneration is the process of restoring injured or lost tissues, organs, or body parts. While simpler organisms generally show greater ability to regenerate their whole body, few complex animals show similarly exceptional regeneration. For example, planarian flatworms have a unique regenerative potential making them a popular study organism among biologists to understand the mechanisms of whole body regeneration. Other organisms, such as hydra, also show extreme regeneration potential;...
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Related Experiment Video

Updated: Apr 7, 2026

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 regeneration: basic research and gene regulation.

Kenji Okita1, Toru Mizuguchi2, Ota Shigenori1

  • 1Department of Surgery, Surgical Oncology, Sapporo Medical University, Sapporo, Hokkaido, 060-8543, Japan.

Surgery Today
|July 8, 2015
PubMed
Summary

Pancreatic regeneration holds promise for controlling diabetes mellitus. This review explores murine models, molecular mechanisms, and genetic factors influencing pancreatic development and beta-cell proliferation.

Keywords:
Gene regulationPancreatic regenerationTranscriptional factors

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Area of Science:

  • Endocrinology and Metabolism
  • Developmental Biology
  • Regenerative Medicine

Background:

  • Pancreatic regeneration (PR) is a complex process with potential therapeutic implications for diabetes mellitus.
  • Understanding the molecular mechanisms of PR is crucial due to differing regenerative capacities between the pancreas and liver.
  • Beta-cell proliferation is a key aspect of pancreatic regeneration.

Purpose of the Study:

  • To review current knowledge on pancreatic regeneration.
  • To explore molecular mechanisms and genetic factors influencing pancreatic development and beta-cell proliferation.
  • To highlight the potential of PR in managing diabetes mellitus.

Main Methods:

  • Review of five representative murine models of pancreatic regeneration.
  • Analysis of thirteen humoral mitogens that stimulate beta-cell proliferation.
  • Examination of pancreatic ontogenesis and transcriptional differences between alpha-cells and beta-cells.
  • Review of 14 murine models with genetic defects in key transcription factors for pancreatic ontogenesis.

Main Results:

  • Identification of key molecular players and signaling pathways involved in pancreatic regeneration.
  • Characterization of specific humoral factors that promote beta-cell proliferation.
  • Elucidation of transcriptional differences between pancreatic cell types.
  • Insights into the genetic regulation of pancreatic development through analysis of gene-deficient models.

Conclusions:

  • Pancreatic regeneration research offers potential avenues for diabetes mellitus control.
  • Further investigation into murine models and genetic factors is essential for understanding PR.
  • Targeting molecular mechanisms of beta-cell proliferation could lead to novel therapeutic strategies.