A new procedure to induce aortic aneurysms in mice

Area of Science:

• Cardiovascular Biology
• Extracellular Matrix Research
• Genetics of Aortic Disease

Background:

• Aortic aneurysms (AAs) are a significant health issue, characterized by aortic wall degradation, dilation, and potential rupture.
• Current treatments for AA are primarily surgical, with no effective pharmacological interventions to prevent or slow disease progression.
• Genetic factors, particularly alterations in extracellular matrix (ECM) genes, play a crucial role in AA development.

Purpose of the Study:

• To investigate the role of cellular communicating network factor 2 (CCN2) in the development of aortic aneurysms.
• To establish a protocol for inducing and detecting AA in mice with inducible global CCN2 deletion.
• To explore CCN2 as a potential therapeutic target for AA treatment.

Main Methods:

• Inducible global knockout of CCN2 in mice.
• Induction of aortic aneurysms using Angiotensin II (Ang II) infusion.
• Monitoring and detection of AA development and rupture.

Main Results:

• Global deletion of CCN2 significantly predisposes mice to early and lethal AA development following Ang II infusion.
• The absence of CCN2 exacerbates aortic wall integrity issues, leading to accelerated aneurysm formation.
• This model allows for detailed characterization of CCN2's contribution to AA pathogenesis.

Conclusions:

• CCN2 plays a critical protective role in maintaining aortic wall integrity and preventing aneurysm formation.
• Targeting CCN2 pathways may offer a novel pharmacological strategy for preventing or treating aortic aneurysms.
• The developed mouse model is valuable for further research into AA mechanisms and therapeutic development.