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Updated: Sep 12, 2025
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Myocardial Infarction in Neonatal Mice, A Model of Cardiac Regeneration
Published on: May 24, 2016
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Ctnna3 Deficiency Promotes Heart Regeneration by Enhancing Cardiomyocyte Proliferation in Neonatal Mice
Sha Zou1,2, Wuhou Dai2, Wufan Tao1,2
1Obstetrics and Gynecology Hospital, State Key Laboratory of Genetic Engineering at School of Life Sciences, Fudan University, 200011 Shanghai, China.
Frontiers in Bioscience (Landmark Edition)
|August 6, 2025
Summary
Ablating Catenin alpha 3 (Ctnna3) in neonatal mice significantly boosts heart regeneration and cardiomyocyte proliferation. This occurs by upregulating Yes-associated protein (Yap), offering new avenues for cardiac repair strategies.
Area of Science:
- Cardiovascular Biology
- Developmental Biology
- Regenerative Medicine
Background:
- Mammalian heart regeneration is limited due to loss of cardiomyocyte proliferative capacity postnatally.
- Molecular mechanisms behind the decline in cardiac proliferation after birth are not fully understood.
Purpose of the Study:
- Investigate the role of Catenin alpha 3 (Ctnna3) in neonatal cardiomyocyte proliferation.
- Determine Ctnna3's function in heart regeneration during the neonatal period.
Main Methods:
- Utilized neonatal mice for heart apex resection experiments.
- Assessed the impact of Ctnna3 ablation on heart regeneration and cardiomyocyte proliferation.
Main Results:
- Ablation of Ctnna3 accelerated heart regeneration in neonatal mice.
- Ctnna3 deficiency enhanced cardiomyocyte proliferation by postnatal day 7 (P7).
- This enhancement was linked to increased Yes-associated protein (Yap) expression.
Conclusions:
- Ctnna3 deficiency promotes heart regeneration and cardiomyocyte proliferation in neonatal mice.
- Targeting α-catenins could be a therapeutic strategy for myocardial regeneration post-injury.
