Myocardial plasticity: cardiac development, regeneration and disease

Area of Science:

• Cardiovascular Biology
• Regenerative Medicine
• Cardiac Development

Background:

• Adult mammalian cardiomyocytes exhibit limited proliferation following injury, hindering cardiac repair after myocardial infarction.
• Cardiomyocytes in certain vertebrates (e.g., zebrafish) and neonatal mammals can de-differentiate, promoting cardiac regeneration.
• De-differentiation in adult mammalian hearts is often linked to pathological remodeling, not beneficial repair.

Purpose of the Study:

• To review recent studies on cardiac development, regeneration, and disease.
• To highlight the regulation of myocardial identity changes (plasticity) in the heart.
• To explore the impact of myocardial plasticity on adaptive and maladaptive cardiac responses.

Main Methods:

• Literature review of studies on cardiac development.
• Analysis of research on cardiac regeneration mechanisms.
• Examination of studies investigating cardiac disease and remodeling.

Main Results:

• Cardiomyocyte proliferation is restricted in adult mammals but robust in specific animal models and neonatal mammals.
• Myocardial cell plasticity, or changes in cell identity, is a critical factor in cardiac responses to injury.
• Understanding the regulation of myocardial plasticity offers insights into promoting cardiac repair.

Conclusions:

• The limited regenerative capacity of the adult mammalian heart is linked to cardiomyocyte proliferation rates.
• Investigating cardiomyocyte de-differentiation and plasticity is crucial for developing strategies for cardiac regeneration.
• Targeting myocardial plasticity could shift cardiac responses from maladaptive remodeling to beneficial repair.