Karen M. D’Souza

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GLP-1 receptor (GLP-1R) agonists may improve endothelial function (EF) via metabolic improvement and direct vascular action. The current study determined the effect of GLP-1R agonist exenatide on postprandial EF in type 2 diabetes and the mechanisms underlying GLP-1R agonist-mediated vasodilation. Two crossover studies were conducted: 36 participants with(More)
Akhter, Shahab A., Karen M. D’Souza, Natalia N. Petrashevskaya, Jeanne Mialet-Perez, and Stephen B. Liggett. Myocardial 1-adrenergic receptor polymorphisms affect functional recovery after ischemic injury. Am J Physiol Heart Circ Physiol 290: H1427–H1432, 2006; doi:10.1152/ajpheart.00908.2005.—Association studies suggest 1-adrenergic receptor ( 1-AR)(More)
Background—Tropomyosin (TM), an essential actin-binding protein, is central to the control of calcium-regulated striated muscle contraction. Although TPM1␣ (also called ␣-TM) is the predominant TM isoform in human hearts, the precise TM isoform composition remains unclear. Methods and Results—In this study, we quantified for the first time the levels of(More)
Background—The cause and consequences of impaired adrenergic signaling in right ventricular failure/hypertrophy (RVH) are poorly understood. We hypothesized that G protein– coupled receptor kinase-2 (GRK2)–mediated uncoupling of ␤-adrenergic receptor signaling impairs inotropic reserve. The implications of right ventricular (RV) adrenergic remodeling for(More)
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