Related Experiment Video
Updated: May 9, 2026
06:08
Ultrasound Imaging of the Thoracic and Abdominal Aorta in Mice to Determine Aneurysm Dimensions
Published on: March 8, 2019
Age-associated pro-inflammatory adaptations of the mouse thoracic aorta
Bianca Hemmeryckx1, Marc F Hoylaerts, Eveline Deloose
1H. R. Lijnen, Center for Molecular and Vascular Biology, KU Leuven, Campus Gasthuisberg, CDG, Herestraat 49, Box 911, 3000 Leuven, Belgium, Tel.: +32 16 345771, Fax: +32 16 345990,
Thrombosis and Haemostasis
|August 9, 2013
Summary
Arterial aging in mice reduces vasodilation and promotes a pro-inflammatory endothelial state. This study investigated age-related changes in aortic smooth muscle cells and endothelial cells, revealing key molecular shifts.
Area of Science:
- Cardiovascular Biology
- Aging Research
- Vascular Physiology
Background:
- Arterial aging is linked to reduced vasodilation and procoagulant endothelial changes.
- The impact of aging on anticoagulant endothelial markers like EPCR is not well understood.
Purpose of the Study:
- To investigate age-associated alterations in aortic smooth muscle cell (SMC) and endothelial cell (EC) structure and function.
- To analyze gene expression related to senescence, oxidative stress, coagulation, and matrix remodeling in aging aortas.
Main Methods:
- Aorta isolation from C57BL/6J mice of different ages (10 weeks, 12 months, 24 months).
- Gene expression analysis for senescence, oxidative stress, coagulation, and matrix remodeling markers.
- In vitro vasorelaxation experiments on thoracic aortic ring segments.
Main Results:
- Increased aortic media thickness and SMC hypertrophy with age.
- Reduced nitric oxide production and acetylcholine-mediated vasodilation in aged aortas.
- Upregulation of inflammatory genes (e.g., TNF-α, VCAM-1) and downregulation of thrombomodulin in aged aortas.
Conclusions:
- Aging in C57BL/6J mice leads to reduced endothelial vasodilation.
- Aged aortas exhibit a pro-inflammatory endothelial phenotype.
- Age-related vascular dysfunction involves complex molecular changes beyond oxidative stress.
