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[Genetics and molecular biology in cardiology (IV). Myocardial response to biomechanical stress]
1epartamento de Cardiología y Cirugía Cardiovascular, Clínica Universitaria, Pamplona. jadimar@unav.es
Insights
Biomechanical stress causes heart muscle cells to change, initially adapting through hypertrophy. Persistent stress leads to heart failure via apoptosis and fibrosis, detailing molecular mechanisms.
Area of Science:
- Cardiovascular Biology
- Molecular Cardiology
- Pathophysiology
Context:
- Biomechanical stress, stemming from conditions like hypoxia and hypertension, significantly impacts myocardial function.
- This stress increases cardiac workload and can lead to loss of functional heart muscle.
- Understanding these responses is crucial for addressing heart muscle diseases.
Purpose:
- To review the myocardial response to biomechanical stress.
- To highlight recent advancements in the molecular mechanisms underlying heart failure development.
- To connect cellular changes to the progression from compensatory hypertrophy to failure.
Summary:
- Biomechanical stress triggers adaptive responses in cardiomyocytes, including hypertrophy.
- Persistent stress can lead to maladaptive changes such as apoptosis and fibrosis.
- These cellular events are key steps in the transition from compensated cardiac function to heart failure.
Impact:
- Provides insights into the molecular pathways driving heart failure.
- Identifies potential targets for therapeutic interventions in cardiovascular disease.
- Enhances understanding of the complex interplay between mechanical forces and cardiac remodeling.
Abstract:
Biomechanical stress of the myocardium is the situation resulting from hypoxia, hypertension, and other forms of myocardial injury, that invariably lead to increased demands for cardiac work and/or loss of functional myocardium. As a consequence of biomechanical stress a number of responses develop involving all the myocardial cells, namely cardiomyocytes. As a result some myocardial phenotypic changes develop that are initially compensatory (i.e., hypertrophy) but which may mediate the eventual decline in myocardial function that occurs with the transition from hypertrophy to failure in conditions of persistent stress (i.e., apoptosis and fibrosis). This review focuses on the steps involved in the response of the myocardium to biomechanical stress and highlights the most recent developments in the molecular mechanisms involved in the development of heart failure.
Related Concept Videos
01:29Pathophysiology of Cardiac Performance
01:29Cardiomyopathy III: Hypertrophic Cardiomyopathy
01:21Myocarditis I: Introduction
01:29Heart Failure II: Pathophysiology