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- W2080367144 abstract "Little is known of the relationship between plaque rupture and adaptive geometric remodelling, especially in the context of unstable atherosclerosis. We have assessed remodelling in the proximal brachiocephalic arteries of fat-fed apoE (apolipoprotein E)-knockout mice. The rate of vessel expansive remodelling is similar in vessels with plaques and without plaques, suggesting that the presence of plaque is not necessary for remodelling to occur. In vessels with plaques, the degree of expansive remodelling was strongly associated with the stability of the plaque. Vessels with stable plaques (i.e. with neither buried fibrous caps nor acute plaque ruptures) showed no expansion, whereas those with evidence of plaque rupture expanded at a significant rate. Vessels with stable plaques suffered significant loss of lumen over time, but those with unstable plaques maintained lumen area over time. Pravastatin treatment of male apoE-knockout mice caused a 5-fold increase in fibrous cap thickness and, although it did not influence overall rates of vessel remodelling, it significantly increased both the amount of vessel expansion and the period of time between plaque ruptures, suggesting that it increases the ability of the plaque to resist the rupturing force caused by vessel expansion. These results suggest that vessel expansion in brachiocephalic arteries of fat-fed apoE-knockout mouse does not require the presence of plaque. When a plaque is present, the outward remodelling force is exerted across its cap: vessels with smaller outward remodelling forces cannot overcome the strength of the cap, and the plaque remains stable. When the remodelling force is greater than the strength of the cap, the plaque ruptures. Thus plaque rupture can be viewed as a consequence of vessel remodelling. Interventions that strengthen the plaque, such as pravastatin therapy, do not alter remodelling parameters but instead allow for more outward remodelling before a rupture is caused." @default.
- W2080367144 created "2016-06-24" @default.
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- W2080367144 date "2007-10-25" @default.
- W2080367144 modified "2023-09-25" @default.
- W2080367144 title "Is there life after plaque rupture?" @default.
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- W2080367144 doi "https://doi.org/10.1042/bst0350887" @default.
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