Atherogenesis and iron: from epidemiology to cellular level

Area of Science:

• Cardiovascular Science
• Biochemistry
• Pathology

Background:

• Iron accumulation is observed in atherosclerotic lesions, but its causal role remains unclear.
• The
• iron hypothesis
• proposes iron is detrimental to cardiovascular health, promoting atherosclerosis.
• Conflicting evidence exists from epidemiological studies and animal models regarding iron's role in atherogenesis.

Purpose of the Study:

• To review current knowledge on the relationship between iron and atherosclerosis.
• To evaluate the evidence from epidemiological studies, animal models, and cellular systems.
• To clarify the role of iron in the development and progression of atherosclerosis.

Main Methods:

• Review of epidemiological studies.
• Analysis of data from animal models of atherosclerosis.
• Examination of cellular systems investigating iron's effects.
• Discussion of iron's source and compartmentalization in atherogenesis.

Main Results:

• Iron, in its catalytically active form, can generate reactive oxygen species and induce lipid peroxidation.
• These processes trigger endothelial activation, smooth muscle cell proliferation, and macrophage activation, all considered proatherogenic.
• Evidence suggests iron plays a contributory rather than an innocent role in atherogenesis.

Conclusions:

• The
• iron hypothesis
• suggests iron is detrimental to the cardiovascular system.
• While some evidence contradicts this, a comprehensive review highlights iron's contributory role in atherosclerosis.
• Further research addressing iron source and compartmentalization is needed.