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Elastic tissue disruption is a major pathogenic factor to human vascular disease
María M Adeva-Andany1, Lucía Adeva-Contreras2, Carlos Fernández-Fernández3
1Nephrology Division, Internal Medicine Department, Hospital General Juan Cardona, c/ Pardo Bazán s/n, 15406, Ferrol, Spain. madevaa@yahoo.com.
Molecular Biology Reports
|June 15, 2021
Summary
Elastic fibers, crucial for arterial health, degrade with age and injury, leading to atherosclerosis. Impaired elastic fiber repair contributes to arterial stiffening and hypertension.
Area of Science:
- Cardiovascular Biology
- Extracellular Matrix Research
- Aging Research
Background:
- Elastic fibers, composed of elastin and microfibrils, are vital for arterial wall structure and function.
- Tropoelastin, the precursor protein, is synthesized throughout life but declines with age.
- Atherosclerosis initiation involves elastic network damage in the arterial media, preceding plaque formation.
Purpose of the Study:
- To elucidate the role of elastic fibers in arterial health and disease.
- To understand the relationship between elastic fiber degradation, aging, and atherosclerosis.
- To highlight the impact of impaired elastic fiber synthesis and repair on vascular function.
Main Methods:
- Analysis of elastic fiber composition and function in the arterial extracellular matrix.
- Investigation of tropoelastin expression and cross-linking mechanisms.
- Examination of age-related changes in arterial elastic networks.
- Review of congenital disorders linked to elastic fiber defects.
Main Results:
- Elastic fiber fragmentation and loss are early events in atherosclerosis, preceding collagen accumulation and plaque development.
- Aging is associated with arterial extracellular matrix changes mirroring early atherosclerosis, including elastic fiber reduction and collagen increase.
- These changes lead to arterial stiffening and intima-media thickening, independent predictors of hypertension.
- Congenital disorders from mutations affecting elastin, cross-linking enzymes, or microfibril proteins cause severe vascular damage.
Conclusions:
- Elastic fiber integrity is fundamental to maintaining arterial structure and function.
- Imbalances in elastic fiber repair contribute significantly to atherosclerosis development and arterial stiffening.
- Age-related decline in elastic fibers plays a critical role in vascular aging and hypertension pathogenesis.
- Genetic defects impacting elastic fiber formation result in severe vascular pathologies.
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