CLINICAL CHEMISTRY, Vol. 28, No. 4, 1982 723 tients who had undergone vagotomy and pyloroplastybutdidnot have dumping syndrome (8). However, only baseline and maximum values were reported, and the authors did not comment regarding the temporal changes inthese hormones asrelatedtothepresenceorabsenceof symptoms. The results we report indicate that, in thispatient,theearlysymptoms ofthe dumping s...

1. The 24 h urinary excretion of noradrenaline and adrenaline is significantly lower in recumbent than ambulant normal subjects. 2. A diurnal variation exists in catecholamine excretion, the lowest values occurring during sleep. 3. Diurnal variation in sodium excretion parallels that in noradrenaline and adrenaline loss but the cycles can be separated by acute alterations in sleep/awake pattern...

BACKGROUND Although uncommon, esthesioneuroblastomas may produce clinically significant amounts of catecholamines. METHODS We report a patient with a catecholamine-secreting esthesioneuroblastoma who developed an intraoperative hypertensive crisis. RESULTS A patient with a history of hypertension was referred to our skull base center for management of a residual esthesioneuroblastoma. A sta...

We have recently shown that chronic fluoxetine treatment acted significantly increasing plasma norepinephrine and epinephrine concentrations both in control and chronically stressed adult male rats. However, possible effects of fluoxetine on catecholamine synthesis and re-uptake in adrenal medulla have been largely unknown. In the present study the effects of chronic fluoxetine treatment on tyr...

Of 78 comparative studies of plasma catecholamines in patients with essential hypertension and in normotensive controls, most reported higher catecholamine levels in the hypertensives, although only about 40% of the studies were positive (reporting statistically significant hypertensivenormotensive differences). Although there was dramatic variability in catecholamine values within and across s...

We examined the role of nitric oxide (NO) in adrenal catecholamine secretion in response to splanchnic nerve stimulation (SNS) and exogenous acetylcholine (ACh) in anesthetized dogs. The NO synthase inhibitor N ω-nitro-l-arginine methyl ester (l-NAME), NO donor 3-(2-hydroxy-1-methyl-2-nitrosohydrazino)- N-methyl-1-propanamine (NOC 7), and ACh were administered intra-arterially into the adrenal ...

Recently, the mechanisms of storage and release of catecholamine in various tissues have become a topic of interest. The present study is on the mechanism of release of catecholamine from the adrenal medulla in an in vitro system. The adrenal medulla seems to provide a suitable system for such an in vitro study, because it contains large amounts of catecholamine in chromaffine granules, about w...

It has long been recognized that noradrenaline, the most abundant catecholamine within the visual cortex, plays important roles in modulating the sensitivity of cortical neurons to visual stimuli. However, whether or not these noradrenaline effects are confined to a discrete synaptic specialization or mediated by diffuse modulation of a group of synapses has remained an issue open for debate. T...

The degree of depression in 88 abandoned children was analysed through a depression rating scale adapted to prepubertal children. The items were grouped into three dimensions: sociological-relational, psychological and biological. In 46 children from this sample it was dosed plasmatic cortisol and the urinary excretion of catecholamine, VMA, HVA and 5-HIAA. When analysing the principal componen...

We previously showed that CGP 42112 (an angiotensin type 2 [AT(2)] agonist) markedly reduces catecholamine biosynthesis by decreasing cGMP production mediated by AT(2), a subtype of Ang II receptor that is dominantly expressed in cultured porcine chromaffin cells. To elucidate the relationship of the 2 types of Ang II receptors, angiotensin type 1 (AT(1)) and AT(2), in the synthesis of catechol...