Barbara J. McDermott

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The endothelium plays a pivotal role in modulating the reactivity of vascular smooth muscle through the formation of several vasoactive substances. We examined the effects of endothelium-dependent and independent vasodilators on forearm blood flow in 29 patients with Type 2 (non-insulin-dependent) diabetes mellitus and in 21 control subjects, using venous(More)
The ADPCM-F coder is the simplest of the four coding techniques. As seen in Fig. 1 it consists of a quantizer with an adaptive step-size and a first order fixed predictor. The step-size adaption is based on the one word memory approach of Jayant, Flanagan, and Cummiskey [2]. The number of bits used in the quantizers are 3, 2, and 1 bit respectively(More)
The potency of neuropeptide Y (NPY) to cause negative and positive contractile responses in rat ventricular cardiomyocytes was investigated. In these cells, NPY was found to activate the transient outward K+ current (Ito) and the slow inward Ca2+ current (Isi). As reported before (H. M. Piper, B. C. Millar, and J. R. McDermott, Naunyn Schmiedeberg's Arch.(More)
For studies on the regulation of myocardial protein metabolism, isolated adult cardiomyocytes were introduced as an experimental model about a decade ago. When used shortly after isolation, this model represents a tool for studying the properties of normal and diseased myocardium on the cellular level. The influence of various peptide hormones,(More)
Decreased release of nitric oxide from damaged endothelium is responsible for the impaired endothelium-dependent vasodilator responses found in animal models of vascular disease. Dietary supplementation with fish oils has been shown to augment endothelium-dependent relaxations, principally by improving the release of nitric oxide from injured endothelium.(More)
Intermedin (IMD) is a novel peptide related to calcitonin gene-related peptide (CGRP) and adrenomedullin (AM). Proteolytic processing of a larger precursor yields a series of biologically active C-terminal fragments, IMD(1-53), IMD(1-47) and IMD(8-47). IMD shares a family of receptors with AM and CGRP composed of a calcitonin-receptor like receptor (CALCRL)(More)
Calcitonin gene-related peptide (CGRP), a neuropeptide localized in the cardiac autonomic nervous supply, shares 46% similarity in sequence of amino acids with amylin, a peptide synthesized in pancreatic beta-cells. In the present study, the question was addressed whether these peptides could exert hypertrophic effects in cardiomyocytes isolated from the(More)
Chronic administration of thiazolidinediones might predispose to cardiac hypertrophy. The aim was to investigate direct effects of rosiglitazone in rat ventricular cardiomyocytes maintained in vitro (24 h). Rosiglitazone (< or =10(-5) M) did not increase protein synthesis and produced small inconsistent increases in cellular protein. In the presence of(More)