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Pathophysiology and biochemistry of cardiovascular disease
1Imperial College London, South Kensington, London SW7 2AZ, UK. j.scott@imperial.ac.uk
Insights
Atherosclerosis, a major cause of cardiovascular disease, involves artery wall oxidation and inflammation. Stem cell technology offers potential for treating heart damage, as the heart cannot regenerate.
Area of Science:
- Cardiovascular Science
- Inflammation and Immunity
- Regenerative Medicine
Background:
- Atherosclerosis is a primary driver of cardiovascular disease, linked to risk factors like hypercholesterolemia, hypertension, and smoking.
- The disease mechanism involves arterial wall oxidation and inflammation, leading to fatty-fibrous lesions.
- Lesion rupture, triggered by trauma or inflammation, can cause heart attack or stroke, while plaque growth can lead to heart failure.
Purpose of the Study:
- To summarize the mechanisms and indicators of atherosclerosis and heart failure.
- To highlight the role of inflammation and cellular signaling in cardiovascular disease progression.
- To introduce the potential of stem cell technology for cardiac repair.
Main Methods:
- Review of established knowledge on atherosclerosis pathogenesis.
- Analysis of inflammatory markers (CRP, CD40) and cardiac proteins (troponin) in disease.
- Examination of calcium signaling and cardiac hypertrophy in heart failure.
- Discussion of stem cell technology in the context of cardiac regeneration.
Main Results:
- Common risk factors converge on oxidation and inflammation in atherosclerosis.
- C-reactive protein (CRP) indicates disease progression; CD40 and troponin are early heart attack indicators.
- Disordered calcium signaling and cardiac hypertrophy contribute to heart failure (HF).
- Enhanced calcium signaling can suppress HF, but cardiac damage is permanent in humans.
Conclusions:
- Atherosclerosis involves complex inflammatory and oxidative processes.
- Early detection of cardiovascular events relies on specific inflammatory and protein markers.
- Heart failure pathogenesis is linked to calcium signaling and hypertrophy.
- Stem cell technology presents a promising avenue for addressing the heart's limited regenerative capacity.
Abstract:
Atherosclerosis is the major cause of cardiovascular disease. Hypercholesterolaemia, hypertension and cigarette smoking are the common risk factors for atherosclerosis. These risk factors unite behind a convergence of mechanism, involving oxidation and inflammation in the artery wall that, with time, gives rise to characteristic fatty-fibrous lesions. Physical trauma and inflammation produce lesion rupture, which can lead to clinical events such as heart attack and stroke, or resolve with plaque growth. Disease progression is marked by the inflammatory indicator CRP (C-reactive protein). Early indicators of heart attack are the inflammatory marker CD40, and the cardiac myofilament protein troponin. Coronary atherosclerosis is the common cause of heart failure (HF). Disordered calcium signalling to the myofilaments occurs in HF and in cardiomyopathy. Enhanced calcium signalling suppresses HF. Neuro-humoral and biomechanical processes, as seen in hypertension, produce cardiac hypertrophy, which predisposes to HF through apoptosis. Although in humans cardiac damage produces permanent loss of cells, because the heart cannot regenerate, developments in stem cell technology suggest that help is at hand.
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