cardiovascular system
• untreated mice show a significant increase in the protein level of phosphorylated cofilin (P-cofilin) and the proportion of F-actin in whole aortic tissues relative to wild-type controls, with no changes in the protein levels of cofilin, 14-3-3 or alpha-smooth muscle actin (alpha-SMA)
• after beta-aminopropionitrile monofumarate (BAPN)-induced thoracic aortic aneurysm and dissection (TAAD), both P-cofilin expression and the F-actin percentage are further increased to levels that are significantly higher than in BAPN-treated controls
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• when 4-wk-old mice are fed a chow diet containing BAPN (4 g/kg) for 28 days to induce aortic aneurysm and dissection, males show a significantly higher rate of ascending aortic rupture than BAPN-treated controls
• however, no differences in elastic fiber fracture, degradation or proteoglycan accumulation are detected in the aorta between the two groups
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• after BAPN-induced TAAD, males show a significantly higher mortality rate than BAPN-treated controls at day 28 (81.25% vs 50%, respectively)
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mortality/aging
• after BAPN-induced TAAD, males show a significantly higher mortality rate than BAPN-treated controls at day 28 (81.25% vs 50%, respectively)
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cellular
• in the BAPN-induced TAAD model, relative BAX protein expression and the ratio of cleaved caspase-3 to total caspase-3 are significantly higher than in BAPN-treated controls, suggesting increased apoptosis in aortic tissue cells
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