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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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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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Related Experiment Video

Updated: Dec 8, 2025

A Biomimetic Model for Liver Cancer to Study Tumor-Stroma Interactions in a 3D Environment with Tunable Bio-Physical Properties
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Cell competition in liver carcinogenesis.

Fabio Marongiu1, Ezio Laconi2

  • 1Department of Biomedical Sciences, Unit of Experimental Medicine, University of Cagliari, Cagliari 09124, Italy.

World Journal of Hepatology
|September 21, 2020
PubMed
Summary
This summary is machine-generated.

Cell competition optimizes tissue fitness by eliminating defective cells, but can also drive cancer growth. This review explores cell competition

Keywords:
AgingCell competitionClonal expansionLiver carcinogenesisLiver repopulationTissue homeostasis

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Area of Science:

  • * Cell biology
  • * Developmental biology
  • * Cancer research

Background:

  • * Cell competition is a quality control mechanism ensuring tissue fitness in multicellular organisms.
  • * It eliminates potentially cancerous cells, reducing cancer risk.
  • * However, cancer cells can exploit cell competition for uncontrolled proliferation.

Purpose of the Study:

  • * To review the emerging role of cell competition in liver physiology and pathology.
  • * To discuss the dual function of cell competition in cancer development.
  • * To explore liver repopulation as a model for cell competition.

Main Methods:

  • * Literature review and synthesis of existing research on cell competition.
  • * Analysis of biological mechanisms underlying cell competition in liver contexts.
  • * Comparison of liver repopulation and carcinogenesis processes.

Main Results:

  • * Cell competition acts as a barrier against neoplastic development by clearing defective cells.
  • * Neoplastic cells can hijack cell competition pathways to promote tumor growth.
  • * Liver repopulation by transplanted hepatocytes shares features with cell competition, suggesting its role in clearing damaged endogenous hepatocytes.

Conclusions:

  • * Cell competition plays a dual role in cancer: a protective barrier and a facilitator of tumor growth.
  • * Understanding cell competition in the liver is crucial for both physiological regeneration and pathological conditions like cancer.
  • * Further research into the molecular mechanisms of cell competition can reveal new therapeutic strategies.