BACKGROUND Experimental findings using animal models of Parkinson disease (PD) suggest that noradrenaline might protect dopamine neurons from damage. OBJECTIVE To assess whether human brain regions having high levels of noradrenaline are less susceptible to dopamine loss in PD. DESIGN Case-control study. SETTING Postmortem investigation. PARTICIPANTS Autopsied brains of patients with PD...

1. The renal haemodynamic and glomerular filtration rate (G.F.R.) responses to intravenous and intrarenal infusions of noradrenaline were studied in conscious dogs, either with or without prior blockade of angiotensin II formation with teprotide. 2. Infusion noradrenaline by either route resulted in dose-related rises in plasma renin activity. 3. Pretreatment with teprotide reduced the rise in ...

Sympathetic neurons are important components of mesenchymal stem cells (MSCs) niche and noradrenaline regulates biological activities of these cells. Here we examined the mechanisms of regulation of MSCs responsiveness to noradrenaline. Using flow cytometry, we demonstrated that α1A adrenergic receptors isoform was the most abundant in adipose tissue-derived MSCs. Using calcium imaging in singl...

Incubation of rat adipocytes with 1 microM-noradrenaline caused a decrease in both the N-ethylmaleimide-sensitive (microsomal) and N-ethylmaleimide-insensitive (mitochondrial) glycerol phosphate acyltransferase activities measured in homogenates from freeze-stopped cells. The effects of noradrenaline on glycerol phosphate acyltransferase activity were apparent over a wide range of concentration...

Three compounds have each been postulated as the possible immediate precursor of noradrenaline (1) : p-hydroxyphenylethanolamine, dihydroxyphenylserine, and hydroxytyramine. Erspamer (2) found p-hydroxyphenylethanolamine in the salivary gland of the octopus; however, the compound has not been reported to be present in mammalian tissues, nor has it been shown that it can be converted to noradren...

The effects of exogenous and endogenous adenosine on exocytotic noradrenaline release were studied in rat hearts perfused in situ. Exocytotic release of endogenous noradrenaline (determined by high pressure liquid chromatography) was induced by electrical stimulation of the left cervicothoracic ganglion. Exogenous adenosine significantly reduced noradrenaline overflow from the heart. This suppr...

Fourteen anaesthetized patients undergoing electro-convulsion therapy on one or more occasions were studied. Systolic and diastolic blood pressure, heart rate, and plasma adrenaline and noradrenaline levels were measured before, during and after the electric shock. With the electric shock, blood pressure and heart rate rose and adrenaline and noradrenaline levels in plasma increased steeply. Th...

The insular cortex (IC) has been reported to be involved in central cardiovascular control. In the present study, we investigated the cardiovascular responses evoked by microinjection of noradrenaline into the IC as well as the central and peripheral mechanisms involved in their mediation. Microinjection of noradrenaline into the IC (3, 7, 10, 15, 30 and 45 nmol/100 nL) caused long-lasting dose...

OBJECTIVE Periodontitis, an infectious disease caused by periodontopathic bacteria, including Porphyromonas gingivalis, is reported to be accelerated by stress, under which noradrenaline levels are increased in the bloodstream. The purpose of this study was to evaluate the effects of noradrenaline on P. gingivalis. DESIGN P. gingivalis was incubated in the presence of 25μM, 50μM, or 100μM adr...

Calcium-independent noradrenaline release was studied in the isolated perfused rat heart under conditions of normoxia, cyanide intoxication, and ischemia. The release of endogenous noradrenaline and dihydroxyphenylglycol were determined by high-performance liquid chromatography. The release of dihydroxyphenylglycol, the main neuronal noradrenaline metabolite, was used as an indicator of the fre...