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Scanning Electron Microscopy of Macerated Tissue to Visualize the Extracellular Matrix
Published on: June 14, 2016
The interaction of coronary tone and cardiac fibrosis
Matthew T Wheeler1, Elizabeth M McNally
1Section of Cardiology, Department of Medicine, The University of Chicago, 5841 South Maryland Avenue, MC 6088, Chicago, IL 60637, USA.
Insights
Coronary vascular dysfunction impairs heart blood flow and can lead to myocardial fibrosis. This review examines how cardiovascular agents affect fibrosis and myofibroblast activity in the heart.
Area of Science:
- Cardiovascular Science
- Cardiac Pathophysiology
- Myocardial Remodeling
Background:
- Regulation of coronary vascular tone is vital for heart perfusion and function.
- Coronary vascular dysfunction, from atherosclerosis to metabolic issues, impairs this regulation.
- This dysfunction often leads to myocardial fibrosis and altered heart structure.
Purpose of the Study:
- To review current literature on myocardial fibrosis and myofibroblast activity.
- To explore the mechanisms linking coronary vascular dysregulation to fibrosis.
- To highlight the impact of cardiovascular agents on cardiac remodeling.
Main Methods:
- Literature review of recent studies on myocardial fibrosis.
- Analysis of the role of fibroblasts and myofibroblasts in cardiac disease.
- Examination of cardiovascular agents' effects on the remodeling process.
Main Results:
- Coronary vascular dysregulation contributes significantly to myocardial fibrosis.
- Fibroblasts and myofibroblasts play a key role in cardiac remodeling.
- Cardiovascular agents show potential in modulating these fibrotic processes.
Conclusions:
- Understanding coronary vascular tone regulation is crucial for preventing myocardial fibrosis.
- Targeting fibroblasts and myofibroblasts offers therapeutic potential for heart disease.
- Further research into cardiovascular agents is needed to combat cardiac remodeling.
Abstract:
Regulation of coronary vascular tone is critical for proper perfusion and function of the myocardium. Many disease processes result in compromised regulation of coronary vascular tone and impaired myocardial perfusion. A common result of coronary vascular dysfunction is the development of areas of replacement fibrosis within the myocardium and surrounding the vasculature. Both intravascular processes, such as coronary atherosclerosis and endothelial dysfunction, and extravascular processes, including compromised myocardial metabolism, hormone excesses, and altered local signaling, may result in coronary vascular dysregulation. Coronary occlusion events, in turn, lead to myocardial damage and the activation of inflammatory cells and fibroblasts. The role of fibroblasts in regulating myocardial fibrosis and the contribution of myofibroblasts, cells that have limited contractile potential while retaining many of the extracellular matrix regulating processes of the fibroblast, may also contribute to the development of myocardial disease. In this review we examine the recent literature on myocardial fibrosis and myofibroblast activity, highlighting the effects of several classes of cardiovascular agents on the remodeling process.
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