Increased Superoxide and Vascular Dysfunction in CuZnSOD-Deficient Mice

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Increased superoxide and vascular dysfunction in CuZnSOD-deficient mice.

Increased superoxide is thought to play a major role in vascular dysfunction in a variety of disease states. Superoxide dismutase (SOD) limits increases in superoxide; however, the functional significance of selected isoforms of SOD within the vessel wall are unknown. We tested the hypothesis that selective loss of CuZnSOD results in increased superoxide and altered vascular responsiveness in C...

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Accelerated Vascular Aging in CuZnSOD-Deficient Mice: Impact on EPC Function and Reparative Neovascularization

OBJECTIVE Aging is associated with increased oxidative stress levels and impaired neovascularization following ischemia. CuZnSOD has an important role to limit oxidative stress in the vasculature. Here we investigated the role of CuZnSOD for the modulation of ischemia-induced neovascularisation during aging. METHODS AND RESULTS Hindlimb ischemia was surgically induced in young (2- month-old) ...

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BACKGROUND AND PURPOSE Hyperhomocysteinemia is an emerging risk factor for stroke, but little is known about effects of hyperhomocysteinemia on cerebral vascular function. We tested the hypothesis that chronic hyperhomocysteinemia in mice causes endothelial dysfunction in cerebral arterioles through a mechanism that involves superoxide. METHODS Mice heterozygous for a targeted disruption of t...

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We tested the hypothesis that the mitochondrial form of superoxide dismutase [manganese superoxide dismutase (Mn-SOD)] protects the cerebral vasculature. Basilar arteries (baseline diameter approximately 140 microm) from mice were isolated, cannulated, and pressurized to measure vessel diameter. In arteries from C57BL/6 mice preconstricted with U-46619, acetylcholine (ACh; an endothelium-depend...

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ژورنال

عنوان ژورنال: Circulation Research

سال: 2002

ISSN: 0009-7330,1524-4571

DOI: 10.1161/01.res.0000043280.65241.04