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Updated: Dec 8, 2025
Author Spotlight: Development and Characterization of a Mouse Model for Abdominal Aortic Aneurysm
Published on: August 2, 2024
Hyperlipidemia does not affect development of elastase-induced abdominal aortic aneurysm in mice
Joscha Mulorz1, Joshua Michael Spin2, Hans Christian Beck3
1VA Palo Alto Health Care System, Palo Alto, CA, United States; Stanford University, Department of Cardiovascular Medicine, Stanford, CA, United States; Department of Vascular and Endovascular Surgery, University Hospital Düsseldorf, Heinrich-Heine-University, Düsseldorf, Germany.
This study investigated if high cholesterol (hyperlipidemia) worsens abdominal aortic aneurysm (AAA) progression. Results showed lipid buildup in AAA lesions but no evidence that hyperlipidemia accelerates AAA development.
Area of Science:
- Cardiovascular Biology
- Atherosclerosis Research
- Vascular Disease Mechanisms
Background:
- Hyperlipidemia is a suspected risk factor for abdominal aortic aneurysm (AAA).
- The causal role of hyperlipidemia in AAA progression remains unclear.
- Investigating the impact of hyperlipidemia on AAA formation is crucial for understanding disease pathogenesis.
Purpose of the Study:
- To test the hypothesis that hyperlipidemia aggravates AAA formation.
- To evaluate the effect of induced hyperlipidemia on AAA progression in a mouse model.
- To determine if elevated plasma lipids influence the development of abdominal aortic aneurysms.
Main Methods:
- Utilized a porcine pancreatic elastase (PPE)-induced AAA model in mice.
- Administered viral vectors to manipulate plasma lipid levels.
- Compared AAA progression in hyperlipidemic and control mice using ultrasonic assessment.
- Included ApoE knockout mice to model severe hyperlipidemia.
Main Results:
- Significant lipid accumulation was observed in experimental AAA lesions and human AAA tissues.
- Despite marked differences in plasma lipids, no significant intergroup differences in AAA diameter progression were detected.
- The study confirmed lipid deposition in the aortic wall of AAA lesions.
Conclusions:
- Lipid deposition is a characteristic feature of both mouse and human AAA lesions.
- The findings do not support the hypothesis that hyperlipidemia causally contributes to AAA progression.
- Further research is needed to elucidate the complex relationship between lipids and AAA pathogenesis.
