Central artery stiffness and thoracic aortopathy.

Area of Science:

• Cardiovascular Medicine
• Biomedical Engineering
• Genetics

Background:

• Thoracic aortopathy, encompassing aneurysms, dissections, and ruptures, is a major cause of illness and death.
• Hypertension and aging are key risk factors, increasing mechanical stress and structural weakness in the aorta.
• Genetic mutations affecting mechanosensing and extracellular matrix regulation are implicated in thoracic aortopathy.

Purpose of the Study:

• To review the impact of central artery stiffening on thoracic aortic biomechanics and hemodynamics.
• To discuss the role of mechanical factors in various thoracic aortopathies, using Marfan syndrome as an example.
• To emphasize the need for biomechanical phenotyping and the utility of mouse models in understanding disease mechanisms.

Main Methods:

• Review of existing literature on thoracic aortopathy, hypertension, aging, and genetics.
• Discussion of hemodynamic principles, including central artery stiffening and pulse pressure.
• Consideration of biomechanical phenotyping and animal models for disease research.

Main Results:

• Central artery stiffening increases pulse pressure, exacerbating mechanical stress on the proximal thoracic aorta.
• Dysfunctional mechanosensing and extracellular matrix regulation contribute to thoracic aortopathy.
• Current non-surgical treatments focus on reducing mechanical load, such as antihypertensive medications.

Conclusions:

• Central artery stiffening plays a critical role in thoracic aortopathy, similar to its known role in other end-organ diseases.
• Biomechanical phenotyping of the aorta is essential for a comprehensive understanding of thoracic aortopathy.
• Further research using mouse models can elucidate molecular and mechanical mechanisms underlying these conditions.