Function and regulation of the complement system in cardiovascular diseases.
Riina Oksjoki1, Petri T Kovanen, Seppo Meri
1Wihuri Research Institute, Helsinki, Finland.
Summary
The complement system is crucial in immunity and cardiovascular diseases like atherosclerosis. Limiting its excessive activation may offer therapeutic benefits for heart conditions.
Area of Science:
- Immunology
- Cardiovascular Biology
- Pathophysiology
Background:
- The complement system is a key component of innate and adaptive immunity.
- Complement activation is implicated in various cardiovascular diseases, including atherosclerosis, aneurysms, and ischemic heart disease.
- Dysregulation of complement, particularly defects in the classical pathway, can lead to conditions like vasculitis and atherosclerosis.
Purpose of the Study:
- To describe complement activation and regulation in cardiovascular diseases.
- To discuss the therapeutic potential of modulating complement activity in cardiovascular disorders.
Main Methods:
- Review of existing literature on complement system's role in cardiovascular diseases.
- Analysis of evidence from experimental animal models.
Main Results:
- Complement is significantly activated in atherosclerotic lesions, arterial aneurysms, and cardiac tissue affected by ischemia or failure.
- Evidence suggests that limiting excessive complement activation could be therapeutically beneficial.
- Deficiencies in the classical complement pathway are linked to increased risk of vasculitis and atherosclerosis, potentially due to impaired clearance of apoptotic cells and immune complex handling.
Conclusions:
- Complement system plays a dual role in cardiovascular diseases, contributing to pathology when overactivated but also being essential for normal function.
- Modulating complement activation presents a promising therapeutic strategy for cardiovascular diseases.
- Further research, particularly in animal models, supports the potential of complement-targeted therapies.
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