Related Experiment Videos
Dietary iron restriction increases plaque stability in apolipoprotein-e-deficient mice
Hsueh-Te Lee1, Li-Li Chiu, Tzong-Shyuan Lee
1Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan, ROC.
Journal of Biomedical Science
|August 21, 2003
Summary
Dietary iron restriction in apolipoprotein E-deficient mice reduced iron deposition and matrix degradation. This led to increased collagen content and enhanced plaque stability, suggesting iron
Area of Science:
- Cardiovascular Research
- Atherosclerosis Pathophysiology
- Nutritional Science
Background:
- Atherosclerosis development is linked to iron accumulation and oxidative stress.
- Plaque stability is a critical factor in cardiovascular event outcomes.
Purpose of the Study:
- To investigate the impact of dietary iron restriction on atherosclerotic plaque stability.
- To determine if reduced iron levels affect matrix degradation and collagen content in vascular lesions.
Main Methods:
- Apolipoprotein E-deficient mice were fed either a standard chow or a low-iron diet.
- Assessed interstitial collagen abundance and matrix metalloproteinase-9 (MMP-9) expression in vascular lesions.
- Evaluated gelatinolytic activity in aortic tissues and sera; treated macrophages with ferric ammonium citrate.
Main Results:
- Low-iron diet reduced iron deposition and significantly increased lesion collagen content.
- Iron restriction led to lower MMP-9 expression and gelatinolytic activity in lesions, aortas, and sera.
- In vitro, ferric ammonium citrate increased MMP-9 secretion by macrophages.
Conclusions:
- Dietary iron restriction in apolipoprotein E-deficient mice enhances plaque stability.
- Reduced vascular iron content lowers matrix degradation capacity, preserving collagen integrity.
- Iron modulation represents a potential therapeutic target for stabilizing atherosclerotic plaques.