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Updated: May 26, 2026

Analysis of Cardiac Chamber Development During Mouse Embryogenesis Using Whole Mount Epifluorescence
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Thymosin beta 4 is dispensable for murine cardiac development and function.

Indroneal Banerjee1, Jianlin Zhang, Thomas Moore-Morris

  • 1Department of Medicine, University of California-San Diego, La Jolla, 92093, USA.

Circulation Research
|December 14, 2011
PubMed
Summary

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Thymosin beta 4 (Tβ4) is not essential for heart development or function. Global and cardiac-specific knockout mice lacking Tβ4 showed no defects, indicating Tβ4 is dispensable for cardiovascular health.

Area of Science:

  • Cardiovascular Biology
  • Developmental Biology
  • Gene Function Studies

Background:

  • Thymosin beta 4 (Tβ4) is implicated in cardiac development and angiogenesis.
  • Previous studies using short hairpin RNA (shRNA) knockdown suggested Tβ4's critical role, but these models had limitations.
  • Complete ablation of Tβ4 was necessary to confirm its function and rule out off-target effects.

Purpose of the Study:

  • To investigate the role of Tβ4 in embryonic and adult heart development.
  • To generate and analyze global and cardiac-specific Tβ4 knockout mouse models.

Main Methods:

  • Generation of global Tβ4-knockout mice.
  • Generation of cardiac-specific Tβ4-knockout mice by crossing Tβ4-floxed mice with Nkx2.5-Cre and αMHC-Cre lines.

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Related Experiment Videos

Last Updated: May 26, 2026

Analysis of Cardiac Chamber Development During Mouse Embryogenesis Using Whole Mount Epifluorescence
06:27

Analysis of Cardiac Chamber Development During Mouse Embryogenesis Using Whole Mount Epifluorescence

Published on: April 17, 2019

Isolation and Transplantation of Different Aged Murine Thymic Grafts.
05:47

Isolation and Transplantation of Different Aged Murine Thymic Grafts.

Published on: May 13, 2015

Characterization of Thymic Settling Progenitors in the Mouse Embryo Using In Vivo and In Vitro Assays
08:56

Characterization of Thymic Settling Progenitors in the Mouse Embryo Using In Vivo and In Vitro Assays

Published on: June 9, 2015

  • Assessment of embryonic viability, cardiac morphology, blood vessel formation, cardiac function, gene expression, and extracellular matrix deposition.

    • Main Results:

    • Global Tβ4-knockout mice were viable and displayed normal heart and blood vessel development.
    • Adult global Tβ4-knockout mice showed no differences in cardiac function, capillary density, or gene expression compared to controls.
    • Cardiac-specific Tβ4-deficient mice also exhibited no discernible phenotype.

    Conclusions:

    • Tβ4 is not essential for embryonic viability or heart and coronary vessel development.
    • Tβ4 is dispensable for maintaining normal adult myocardial function and cardiovascular integrity.