Abstract：
BACKGROUND:The apolipoprotein E-deficient mouse (ApoE) spontaneously develops hypercholesterolemia and atherosclerotic lesions in large arteries. It is also known that angiotensin II-induced hypertension accelerates the development of atherosclerosis in ApoE mice. The objective of this study was to evaluate the aortic remodeling process in ApoE mice during the early phase of atherosclerosis in two-kidney one-clip hypertensive (2K1C) mice and in mice with the coexistence of atherosclerosis and arterial hypertension. METHODS:Renovascular hypertension was induced in 8- to 9-week-old C57BL/6 (C57) and ApoE and compared to sham animals 28 days later. C57-2K1C and ApoE-2K1C mice showed hypertension, tachycardia, and cardiac hypertrophy of similar magnitude. RESULTS:ApoE and ApoE-2K1C mice showed high levels of plasma cholesterol (4.8- and 3.6-fold) and aorta lipid deposition (85- and 101-fold) compared to C57 mice. The aorta lumen area was increased in C57-2K1C and ApoE-2K1C mice (0.57 +/- 0.04 and 0.55 +/- 0.02 mm(2)) compared to C57 mice (0.50 +/- 0.02 mm(2), p <0.05). The aorta wall area was increased by 20% in C57-2K1C and by 12% in ApoE-2K1C mice compared to C57 and ApoE. CONCLUSIONS:The main finding of this study was the absence of aorta remodeling in ApoE mice at the early stage of atherosclerosis and an outward remodeling of similar magnitude in C57-2K1C and ApoE-2K1C mice.
journal_name
Arch Med Resjournal_title
Archives of medical researchauthors
Nogueira BV,Peotta VA,Meyrelles SS,Vasquez ECdoi
10.1016/j.arcmed.2007.06.005subject
Has Abstractpub_date
2007-11-01 00:00:00pages
816-21issue
8eissn
0188-4409issn
1873-5487pii
S0188-4409(07)00205-6journal_volume
38pub_type
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