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Related Concept Videos

Cell Specific Gene Expression01:58

Cell Specific Gene Expression

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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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Cell Type-specific Gene Expression Profiling in the Mouse Liver
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Published on: September 17, 2019

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Cell Type-specific Gene Expression Profiling in the Mouse Liver.

Amber W Wang1, Adam M Zahm1, Kirk J Wangensteen2

  • 1Department of Genetics, University of Pennsylvania.

Journal of Visualized Experiments : Jove
|October 15, 2019
PubMed
Summary

Researchers developed a new method to study liver regeneration. This technique isolates specific liver cells, enabling detailed analysis of gene expression during liver repair after injury.

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Area of Science:

  • Hepatology
  • Molecular Biology
  • Genomics

Background:

  • Liver repopulation is vital for mammalian survival after injury, preventing organ failure.
  • Understanding gene expression during liver regeneration can reveal therapeutic targets for liver repair.
  • Current methods for isolating repopulating hepatocytes are limited by cell markers, numbers, and fragility.

Purpose of the Study:

  • To develop a method for isolating repopulating hepatocytes for gene expression profiling.
  • To overcome limitations of existing cell isolation techniques for studying liver regeneration.

Main Methods:

  • Utilized translating ribosome affinity purification (TRAP) technology.
  • Employed a Fah-/- mouse model to induce and study liver injury and repopulation.
  • Developed a TRAP-based method using green fluorescent protein (GFP)-tagged ribosomal protein (GFP:RPL10A) for affinity isolation of translating mRNA from specific hepatocytes.

Main Results:

  • Successfully isolated high-quality, cell type-specific translating mRNA from repopulating hepatocytes.
  • The TRAP method efficiently isolated mRNA, circumventing lengthy cell sorting processes.
  • Isolated mRNA was free from contamination by other liver cell types, ensuring accurate gene expression analysis.

Conclusions:

  • The developed TRAP method enables precise gene expression profiling of repopulating hepatocytes.
  • This technique provides a valuable tool for identifying therapeutic targets to promote liver function restoration.
  • Advances in studying liver regeneration can lead to improved treatments for liver injuries.