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Cardiac aging is associated with progressive structural changes and functional impairment, such as left ventricular hypertrophy, fibrosis and diastolic dysfunction. Aging also increases myocardial activity of endothelin-1 (ET-1), a multifunctional peptide with growth-promoting and pro-fibrotic activity. Because the G protein-coupled estrogen receptor (GPER) regulates vascular responsiveness to ET-1,...
Aging is a major risk factor for carotid artery disease that may lead to stroke and dementia. Vascular effects associated with aging include increased vasomotor tone, as well as enhanced contractility to endothelial vasoconstrictor prostanoids and reduced nitric oxide (NO) bioactivity partly due to increased oxidative stress. We hypothesized that vascular NADPH oxidase (Nox)-derived superoxide may...
The aim of this study was to investigate whether the L-type calcium current (ICa.L) may be altered in aged hearts and whether the classical calcium antagonist verapamil may exhibit altered pharmacological profile in aged hearts. We examined male New Zealand rabbits aged either 6 months or 26 months. To examine ICa.L whole-cell patch-clamp technique was performed on isolated cells. Moreover, activation-recovery...
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