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miR-24 limits aortic vascular inflammation and murine abdominal aneurysm development
Lars Maegdefessel1, Joshua M Spin2, Uwe Raaz3
11] Division of Cardiovascular Medicine, Stanford University, Falk CVRB, 300 Pasteur Drive, Stanford, California 94305, USA [2] Center for Molecular Medicine L8:03, Department of Medicine, Karolinska Institute and University Hospital, Stockholm 17176, Sweden.
Nature Communications
|November 1, 2014
Summary
MicroRNAs (miRNAs) like miR-24 are key regulators of abdominal aortic aneurysm (AAA) progression. Targeting miR-24 and its effector Chi3l1 shows potential for treating AAA and offers new biomarkers for disease progression.
Area of Science:
- Cardiovascular Medicine
- Molecular Biology
- Genetics
Background:
- Abdominal aortic aneurysm (AAA) presents significant challenges in vascular medicine.
- MicroRNAs (miRNAs) are critical regulators of cardiovascular diseases, offering potential therapeutic targets.
- Understanding molecular mechanisms driving AAA is crucial for effective treatment.
Purpose of the Study:
- To investigate the role of miR-24 in abdominal aortic aneurysm (AAA) pathology.
- To identify the downstream targets and functions of miR-24 in vascular inflammation and AAA.
- To evaluate miR-24 and CHI3L1 as potential biomarkers for AAA disease progression.
Main Methods:
- Utilized two murine models of AAA disease.
- Conducted in vivo and in vitro studies on vascular cells and macrophages.
- Analyzed human aortic tissue and plasma samples.
Main Results:
- miR-24 was identified as a key regulator of vascular inflammation and AAA pathology.
- Chitinase 3-like 1 (Chi3l1) was confirmed as a major target of miR-24, influencing macrophage function and smooth muscle cell migration.
- Modulation of miR-24 affected AAA progression in animal models.
- miR-24 and CHI3L1 emerged as novel plasma biomarkers for human AAA progression.
Conclusions:
- miR-24 plays a significant role in regulating vascular inflammation and AAA pathogenesis.
- The miR-24/Chi3l1 axis is a critical pathway in AAA development.
- miR-24 and CHI3L1 show promise as diagnostic and prognostic biomarkers for abdominal aortic aneurysm.
