Accelerated aneurysmal dilation associated with apoptosis and inflammation in a newly developed calcium phosphate rodent abdominal aortic aneurysm model.

Journal of Vascular Surgery
Dai YamanouchiBo Liu

Abstract

The calcium chloride (CaCl(2)) model is a widely accepted rodent model for abdominal aortic aneurysms (AAAs). Calcium deposition, mainly consisting of calcium phosphate (CaPO(4)) crystals, has been reported to exist in human and experimental aneurysms. CaPO(4) crystals have been used for in vitro DNA transfection by mixing CaCl(2) and phosphate-buffered saline (PBS). Here, we describe accelerated aneurysm formation resulting from a modification of the CaCl(2) model. A modified CaCl(2) model, the CaPO(4) model, was created by applying PBS onto the mouse infrarenal aorta after CaCl(2) treatment. Morphologic, histologic, and immunohistochemical analyses were performed on arteries treated with the CaPO(4) model and the conventional CaCl(2) model as the control. In vitro methods were performed using a mixture of CaCl(2) and PBS to create CaPO(4) crystals. CaPO(4)- induced apoptosis of primary cultured mouse vascular smooth muscle cells (VSMCs) was measured by DNA fragmentation enzyme-linked immunosorbent assay. The CaPO(4) model produces AAA, defined as an increase of ≥50% in the diameter of the aorta, faster than in the CaCl(2) model. The CaPO(4) model showed significantly larger aneurysmal dilation at 7, 28, and 42 days, as reflec...Continue Reading

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Citations

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