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Related Concept Videos

What is Gene Expression?01:42

What is Gene Expression?

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Overview
Gene expression is the process in which DNA directs the synthesis of functional products, that is, proteins. Cells can regulate gene expression at various stages. It allows organisms to generate different cell types and enables cells to adapt to internal and external factors.
Genetic Information Flows from DNA to RNA to Protein
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What is Gene Expression?01:36

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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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Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences  access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area. 
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mRNA Stability and Gene Expression02:51

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The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
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Characterization of In Vitro Differentiation of Human Primary Keratinocytes by RNA-Seq Analysis
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Molecular Characterization of Primary Human Astrocytes Using Digital Gene Expression Analysis.

Jin Wook Kim1, Ju Ho Jeong1

  • 1Department of Neurosurgery, Dongguk University Gyeongju Hospital, Dongguk University College of Medicine, Gyeongju, Korea.

Korean Journal of Neurotrauma
|May 18, 2019
PubMed
Summary
This summary is machine-generated.

This study reveals key gene expression patterns in human primary astrocytes (HPAs), identifying significant pathway differences compared to neural stem cells. These findings offer molecular insights into astrocyte function and potential diagnostic tools for central nervous system (CNS) diseases.

Keywords:
AstrocytesGene expressionmRNA

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Genomics

Background:

  • Astrocyte dysfunction is implicated in various central nervous system (CNS) pathologies.
  • Understanding astrocyte molecular functions is crucial for developing effective CNS disease treatments.

Purpose of the Study:

  • To perform transcriptomic profiling of human primary astrocytes (HPAs).
  • To identify differentially expressed genes and pathways in HPAs compared to neural stem cells.
  • To provide molecular-level data for understanding astrocyte functions.

Main Methods:

  • Differential digital gene expression (DGE) analysis using next-generation sequencing (NGS).
  • Comparison of DGE data between HPAs and human neural stem cell line (HB1.F3).
  • Bioinformatic analysis to identify up- and down-regulated pathways in HPAs.

Main Results:

  • Several canonical pathways were significantly up-regulated in HPAs, including cell cycle regulation, integrin signaling, Wnt/β-catenin signaling, and mTOR signaling.
  • Key down-regulated pathways in HPAs included G1/S and G2/M cell cycle checkpoints, telomerase signaling, oxidative stress response, and ERK/MAPK signaling.
  • Identification of novel pathways associated with astrocyte function and potential links to glioma signaling.

Conclusions:

  • The study provides a molecular-level understanding of astrocyte functions.
  • The identified DGE patterns in astrocytes could serve as a basis for developing diagnostic tests for CNS diseases.
  • This research offers a valuable reference for future studies on astrocyte biology and related pathologies.