Ralph W Stevenson

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Falls following a meal occur commonly in older persons. These falls have been related to a decrease in postprandial blood pressure due to carbohydrates in the meal. The mechanism by which this occurs is not known. In this study, we examined the possible role of a vasodilatory peptide, calcitonin gene-related peptide (CGRP), which is released following(More)
BACKGROUND Activation of the A2A adenosine receptor (A2AAR) decreases production of inflammatory cytokines, prevents C. difficile toxin A-induced enteritis and, in combination with antibiotics, increases survival from sepsis in mice. We investigated whether A2AAR activation improves and A2AAR deletion worsens outcomes in a murine model of C. difficile(More)
Amylin (islet amyloid polypeptide) is a recently identified pancreatic peptide. It has been shown to affect glucose metabolism both in vitro and in vivo. A cross sectional analysis of the effects of age on amylin secretion following a 75 g glucose tolerance test in a young (20-40 years), middle aged (41-60 years) and older (61-90 years) group was performed.(More)
Subjects wore blue filters (Kodak Wratten 45) in front of their normal spectacle correction for a period of 4.5 hr. Visual evoked potential (VEP's) were measured (monocularly) before, in white light and through the blue filters at the start and finish of wearing the filters. Predictably, from the chromatic interval, the subjects initially showed some degree(More)
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