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  • 1
    ISSN: 1432-0428
    Keywords: Keywords Amylin ; hypertension ; calcitonin ; ACE inhibition ; calcitonin gene related peptide.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Amylin (or islet amyloid polypeptide) has been reported to have binding sites in the central nervous system and the kidney and has been shown to activate plasma renin. It has been postulated that this peptide may be an important mechanistic link between hypertension and diabetes in the insulin resistance syndrome. To explore this issue, the effects of rat amylin on mean arterial blood pressure were investigated in anaesthetised rats. Amylin elicited a pressor response of approximately 10 mmHg (maximal at 100 pmol · kg–1) which was apparent within 30–60 s and persisted over 15 min. At higher concentrations amylin elicited a hypotensive response (negative log IC50 8.52 mol · kg–1). The novel amylin receptor antagonist AC413 (12 nmol · kg–1· min–1) reduced the pressor response but not the hypotensive effects of amylin. The peptide antagonist calcitonin gene-related peptide (CGRP)8–37 (12 nmol · kg–1· min–1) reduced the pressor response elicited by amylin and also antagonized the hypotensive effect of amylin. Pre-treatment of animals with the ganglion blocker mecamylamine (3 mg · kg–1 s. c.) reduced the pressor effect of amylin. Following the administration of the angiotensin converting enzyme inhibitor ramiprilat (300 nmol · kg–1 i. v.) the pressor response to amylin was reduced. Salmon calcitonin also elevated blood pressure in the anaesthetised rat; doses of amylin and salmon calcitonin associated with a pressor effect were associated with increases in plasma renin activity. We conclude that amylin may act centrally to elevate blood pressure in the anaesthetised rat, possibly through activation of the renin angiotensin system. [Diabetologia (1997) 40: 256–261]
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 34 (1988), S. 525-528 
    ISSN: 1432-1041
    Keywords: cefixime ; oral cephalosporin ; absorption
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Twenty healthy adult volunteers received single 400 mg oral doses of cefixime in an open, randomized, crossover study, administered twice in the fasted state and twice with a standard breakfast. The study design allowed both an evaluation of a potential food effect and also an analysis of both intrasubject and intersubject variability in the fasted and fed state. There was a small but significantly longer (∼1 h) time to peak concentration when the drug was given with food. Peak serum concentrations, area under the curve, and 24 h urinary recovery values were unchanged in the fed and fasted states. The terminal elimination half-life of the drug given after a meal (3.6 h) was slightly longer than that observed after dosing in the fasting condition (3.5 h). The intrasubject and intersubject variabilities were less than 12% and 33% respectively, for both area under the curve and 24 h urinary recovery, and were virtually the same for the fasted and fed occasions. Therefore, the drug may be administered with or without food.
    Type of Medium: Electronic Resource
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