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Related Concept Videos

Cell Specific Gene Expression01:58

Cell Specific Gene Expression

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
10:06

Cell Type-specific Gene Expression Profiling in the Mouse Liver

Published on: September 17, 2019

Characterization of the rat developmental liver transcriptome.

Richard H Chapple1, Polyana C Tizioto, Kevin D Wells

  • 1Division of Animal Sciences, University of Missouri-Columbia, Columbia, MO 65211, USA.

Physiological Genomics
|February 23, 2013
PubMed
Summary

RNA-Seq reveals dynamic gene expression in developing rat liver, highlighting hepatocyte maturation and lipid metabolism shifts from fetal to neonatal stages. Novel transcripts were also identified.

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Area of Science:

  • Developmental Biology
  • Genomics
  • Molecular Biology

Background:

  • RNA-Seq offers advanced transcriptome analysis, overcoming limitations of microarray technology.
  • It enables quantification and annotation of diverse RNA types, including novel transcripts.
  • Understanding early liver development is crucial for metabolic health.

Purpose of the Study:

  • To investigate global gene expression patterns during early rat liver development using RNA-Seq.
  • To identify key genes and pathways involved in hepatocyte maturation and metabolic function.
  • To discover and annotate novel transcripts in the developing liver.

Main Methods:

  • RNA-Seq on rat liver samples from embryonic day 14 to postnatal day 7.
  • Data analysis using the Tuxedo software suite and DAVID Bioinformatics Database.
  • Bioinformatic identification of novel transcripts from intergenic regions.

Main Results:

  • Hematopoietic gene expression begins by embryonic day 14.
  • Hepatocyte maturation involves nutrient response and metabolic enzyme gene clusters.
  • Postnatal liver development shows enrichment of mitochondrial and cholesterol synthesis genes.
  • 1,307 novel liver transcripts were annotated.

Conclusions:

  • Rat liver development is a gradual process characterized by distinct gene expression shifts.
  • RNA-Seq provides comprehensive insights into liver transcriptome dynamics.
  • The study identified key molecular events in early liver maturation and metabolic adaptation.