alexa Pathogenic sequence for dissecting aneurysm formation in a hypomorphic polycystic kidney disease 1 mouse model.
Microbiology

Microbiology

Journal of Microbial & Biochemical Technology

Author(s): Hassane S, Claij N, Lantingavan Leeuwen IS, Van Munsteren JC, Van Lent N,

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Abstract OBJECTIVE: Autosomal Dominant Polycystic Kidney Disease (ADPKD) is a multi-system disorder characterized by progressive cyst formation in the kidneys. Serious complications of ADPKD are intracranial and aortic aneurysms. The condition is mainly caused by mutations in the PKD1 or PKD2 gene. We have carefully analyzed vascular remodeling in hypomorphic Pkd1(nl/nL) mouse model with dissecting aneurysms in the aorta. METHODS AND RESULTS: Quantitative real-time polymerase chain reaction revealed that in the aorta the expression of normal Pkd1 is reduced to approximately 26\%. Using (immuno)histochemistry we have characterized the pathogenetic sequence for dissecting aneurysm formation. The aorta shows regions with accumulation of matrix components between the elastin lamellae. This is followed by increased numbers of smooth muscle cells and locally weakening of the media. In the intima, accumulation of matrix components and detachment of endothelial cells from the elastin lamellae results in a tear. The combination of weak media and a tear in the intima leads to rupture of the vessel wall resulting in intramural bleeding. CONCLUSIONS: The Pkd1(nl/nl) mouse reveals that polycystin1 is implicated in maintenance of the vessel wall structural integrity, and it is a useful model for dissecting aneurysm formation studies. This article was published in Arterioscler Thromb Vasc Biol and referenced in Journal of Microbial & Biochemical Technology

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