Mouse models of plaque rupture

Area of Science:

• Cardiovascular Research
• Pathology
• Translational Medicine

Background:

• Atherosclerotic plaque rupture is a major cause of acute myocardial infarction (heart attack).
• Understanding plaque rupture mechanisms is crucial for developing effective treatments.
• Existing research highlights the need for reliable animal models to study this process.

Purpose of the Study:

• To analyze the mechanisms underlying atherosclerotic plaque destabilization and rupture.
• To evaluate the efficacy of novel therapeutic approaches using animal models.
• To assess the suitability of specific mouse models for studying plaque rupture.

Main Methods:

• Utilizing apolipoprotein E (ApoE)-deficient mice fed a high-fat diet.
• Inducing plaque rupture in brachiocephalic arteries.
• Employing Angiotensin II infusion to accelerate plaque destabilization and rupture.
• Comparing histological features with human ruptured plaques.

Main Results:

• Atherosclerotic plaques in ApoE-deficient mice share histological similarities with human ruptured plaques.
• Angiotensin II infusion accelerates plaque destabilization and rupture in this model.
• The model allows for the analysis of pathophysiological and genetic factors influencing plaque rupture.
• Discrepancies exist regarding thrombotic occlusion and mechanical stress compared to human plaques.

Conclusions:

• The brachiocephalic artery model in ApoE-deficient mice is a practical and feasible model for studying plaque rupture.
• While not a perfect simulation, this model aids in analyzing plaque destabilization and rupture mechanisms.
• Further research can refine this model to better mimic human plaque rupture conditions.