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Nitric oxide, cell death, and heart failure
Jun-ichi Oyama1, Stefan Frantz, Charles Blais
1Cardiovascular Division, Brigham and Women's Hospital, Boston, MA, USA.
Abstract:
Strong evidence links cardiomyocyte loss to the pathology of some forms of heart failure. Both necrotic and apoptotic modes of cell death have been invoked as the mechanism underlying progressive cardiomyocyte dropout. Nitric oxide (NO) has received particular attention as a candidate reactive oxygen intermediate that influences not only cardiac function, but also cell death elicited by both apoptotic and necrotic mechanisms. NO is produced by resident cardiac cells under stress, and is produced in large quantities by activated immune cells that infiltrate the injured heart. A review of the literature, however, reveals that the actions of NO on apoptotic cell death are complex, especially in the context of heart disease, and that the practical contribution of NO to cell death in heart disease is yet to be defined.
Insights
Nitric oxide (NO) plays a complex role in heart failure, influencing both cardiac function and cell death. Its precise contribution to cardiomyocyte loss in heart disease requires further investigation.
Area of Science:
- Cardiovascular Science
- Cell Biology
- Pathology
Background:
- Cardiomyocyte loss is a key factor in heart failure development.
- Both necrosis and apoptosis contribute to progressive cardiomyocyte dropout.
- Nitric oxide (NO) is implicated in cardiac function and cell death pathways.
Purpose of the Study:
- To review the literature on the role of nitric oxide (NO) in cardiomyocyte death.
- To elucidate the complex actions of NO on apoptotic cell death in heart disease.
- To define the practical contribution of NO to cell death in the context of heart disease.
Main Methods:
- Literature review of studies investigating nitric oxide (NO) and cardiomyocyte death.
- Analysis of research on NO production by cardiac cells and infiltrating immune cells.
- Examination of NO's influence on both apoptotic and necrotic cell death mechanisms.
Main Results:
- Nitric oxide (NO) influences cardiac function and cell death.
- NO is produced by stressed cardiac cells and activated immune cells.
- The specific role of NO in apoptotic cell death within heart disease is complex and not fully defined.
Conclusions:
- Cardiomyocyte loss is linked to heart failure pathology.
- Nitric oxide's (NO) effects on apoptosis in heart disease are intricate.
- The precise impact of NO on heart disease-related cell death remains to be determined.