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Related Concept Videos

Liver Regeneration01:24

Liver Regeneration

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.
Cells of Liver
The liver comprises four major types of cells— hepatocytes, stellate, Kupffer, and sinusoidal endothelial cells. The hepatocytes are large...

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Cell Type-specific Gene Expression Profiling in the Mouse Liver
10:06

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Published on: September 17, 2019

Cell fusion is a physiological process in mouse liver.

Francesca Faggioli1, Maria Grazia Sacco, Lucia Susani

  • 1Human Genome Department, Istituto di Tecnologie Biomediche, Italian National Research Council, CNR, Segrate, Italy.

Hepatology (Baltimore, Md.)
|October 18, 2008
PubMed
Summary

Hepatocyte cell fusion occurs naturally in adult mice, challenging previous assumptions about liver cell proliferation. This study provides evidence for cell fusion as a mechanism in unperturbed liver settings.

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Area of Science:

  • Hepatology
  • Cell Biology
  • Genetics

Background:

  • Hepatocytes are often polyploid, with endoduplication and failed cytokinesis previously considered the primary source.
  • Recent studies suggested liver cell fusion with bone marrow cells, but protocols involved liver damage and cell ablation.
  • The significance of cell fusion in unperturbed liver settings remained unclear.

Purpose of the Study:

  • To investigate the occurrence of hepatocyte cell fusion in an unperturbed adult mouse liver.
  • To differentiate cell fusion from other mechanisms of hepatocyte proliferation.
  • To provide direct evidence for cell fusion in vivo.

Main Methods:

  • Creation of chimeric mice with distinct reporter genes (LacZ and GFP).
  • Immunohistochemistry and polymerase chain reaction analysis to detect cells with both markers.
  • Fluorescence in situ hybridization (FISH) on XY/XX chimeric mice using chromosome-specific probes for direct visualization.

Main Results:

  • Detection of hepatocytes positive for both reporter genes (LacZ and GFP) in chimeric mice.
  • Confirmation of cell fusion through genetic analysis at the single-cell level.
  • Demonstration of cell fusion occurring in a non-ablated, unperturbed liver environment.

Conclusions:

  • The study confirmed that cell fusion occurs in the adult mouse liver under normal conditions.
  • This finding suggests cell fusion is a viable mechanism for liver cell dynamics.
  • The employed techniques provide robust methods for studying cell fusion in vivo.