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Related Experiment Video

Updated: Nov 28, 2025

AAV Systems and Mouse Models for Investigating Ectopic Expression of Neurod1 in Transduced Cells at Subacute and Chronic Times Post-Ischemic Stroke
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Time for rethinking the different β-actin transgenic mouse models?

Bieke Vanslembrouck1, Christophe Ampe2, Jolanda van Hengel1

  • 1Medical Cell Biology Research Group, Department of Human Structure and Repair, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium.

Cytoskeleton (Hoboken, N.J.)
|November 29, 2020
PubMed
Summary
This summary is machine-generated.

The Actb gene is essential for embryonic development, but β-actin protein is dispensable later in life. Gene editing Actb to produce γ-actin shows viability, suggesting nucleotide sequence importance.

Keywords:
Actbactincytoplasmic-β-actintransgenic mouse models

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Area of Science:

  • Cell Biology
  • Genetics
  • Molecular Biology

Background:

  • The actin family is vital for cellular functions, with mammals having muscle and non-muscle forms.
  • Cytoplasmic-β-actin (Actb) and cytoplasmic-γ-actin are highly similar, sharing functional roles.

Purpose of the Study:

  • To investigate the properties of the Actb gene and its mRNA transcripts, focusing on the 3'UTR.
  • To analyze the essentiality of Actb and β-actin protein using various transgenic mouse models.

Main Methods:

  • Creation of transgenic mouse models with modified Actb loci (insertion, deletion, gene editing).
  • Analysis of phenotypes resulting from whole-body knockouts, tissue-specific ablation, and gene editing.
  • Examination of β-actin ablation effects and upregulation of other actin paralogs.

Main Results:

  • Whole-body Actb knockouts and most insertion models result in embryonic lethality.
  • Tissue-specific ablation of Actb shows mild or no phenotypes, indicating dispensability later in development.
  • Gene-edited mice producing γ-actin instead of β-actin are viable, suggesting nucleotide sequence importance.

Conclusions:

  • The Actb gene and its transcripts are crucial for embryonic viability.
  • β-actin protein may be dispensable in later developmental stages, with potential compensation by other actin paralogs.
  • Further comprehensive analysis of actin transcripts and protein levels is needed to understand functional redundancy.