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  • 1
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    Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research
    In:  EPIC3Polarforschung, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research, 24(1/2), pp. 301-304, ISSN: 0032-2490
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: "Polarforschung" , peerRev
    Format: application/pdf
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 8 (1960), S. 178-182 
    ISSN: 1520-5118
    Source: ACS Legacy Archives
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1041
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 26 (1984), S. 543-547 
    ISSN: 1432-1041
    Keywords: indapamide ; hypertension ; glomerular filtration ; arginine vasopressin ; free water clearance ; blood pressure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Renal plasma flow (RPF), glomerular filtration rate (GFR), arginine vasopressin in plasma (AVP), free water clearance ( $${\text{C}}_{{\text{H}}_{\text{2}} {\text{O}}}$$ ) and blood pressure (BP) were determined in 11 patients with essential hypertension at the end of 3 consecutive periods of observation each of 6 of weeks duration; indapamide 2.5 mg daily was given in period 2 and placebo in periods 1 and 3. RPF and GFR were reduced by 9% and BP by 9%/14% supine and 14%/12% standing during indapamide treatment. Changes in renal haemodynamics were not correlated with those in BP. AVP was not significantly altered by indapamide and was not correlated with BP. Indapamide reduced $${\text{C}}_{{\text{H}}_{\text{2}} {\text{O}}}$$ possibly due to the reduction in GFR. It is concluded that indapamide evidently induces redistribution of the cardiac output, with enhanced muscle blood flow and reduced renal perfussion, and that AVP does not seem to be involved in blood pressure regulation in mild to moderate essential hypertension under basal conditions.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-1041
    Keywords: verapamil ; hypertension ; renal haemodynamics ; glomerular filtration ; arginine vasopressin ; renal function
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Renal plasma flow, glomerular filtration rate plasma angiotensin II, aldosterone and arginine vasopressin, free water clearance, blood pressure and body weight in 11 patients with mild to moderate hypertension were determined at the end of consecutive 6 week periods of administration of placebo and verapamil up to 120 mg t.i.d. Verpamil induced a 10% reduction in diastolic blood pressure. Compared with placebo none of the other parameters measured changed after treatment with verapamil. There was no significant correlation between blood pressure and arginine vasopressin in plasma. It is concluded that verapamil reduced blood pressure by vasodilatation without activation of the counterbalancing mechanisms commonly seen after treatment with vasodilating drugs, i.e. tachycardia, activation of the renin-angiotensin-aldosterone system, water and salt retention, and without affecting renal haemodynamics. AVP does not seem to be involved in blood pressure regulation in mild to moderate essential hypertension.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-1041
    Keywords: nifedipine ; arterial hypertension ; calcium antagonist ; renin ; aldosterone ; catecholamines ; autonomic activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Acute sublingual administration of nifedipine 10–20 mg to 13 hypertensive patients caused a rapid decrease in blood pressure (BP) and a concomitant increase in heart rate (HR), plasma noradrenaline (NA) and plasma renin activity (PRA); there was no significant change in plasma adrenaline (A) or aldosterone (ALDO). Basal PRA was the major determinant of the rise in PRA, as a close correlation was present between the basal value and the increase caused by nifedipine (r=0.92, p〈0.001). The rise in PRA was also correlated with the plasma concentration of nifedipine after 60 min (r=0.80, p〈0.01), but it was not correlated with the decrease in BP, the rise in HR or the increase in NA. Nifedipine 30–60 mg daily for 6 weeks caused a reduction in mean BP from 133 to 113 mmHg (p〈0.001). Body weight and serum potassium decreased but no consistent change was noted in NA, PRA, ALDO or 24 h-excretion of catecholamines. A significant correlation was present between the change in NA and that in PRA (r=0.74, p〈0.01). The alterations in the various parameters in the acute and chronic studies were not correlated. The findings indicate that different regulatory mechanisms are activated during acute and chronic administration of nifedipine. It is suggested that an initial rise in sympathetic activity gradually decreases during prolonged therapy, but it still remains a determinant of PRA.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 18 (1980), S. 135-139 
    ISSN: 1432-1041
    Keywords: hypertension ; labetalol ; propranolol ; renal haemodynamics ; glomerular filtration rate ; blood pressure ; exercise ; renal blood flow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The effect of exercise on renal haemodynamics was examined in young patients with mild essential hypertension. Four groups of subjects were studied: 13 normotensive, healthy control subjects, and 15 untreated, 11 propranolol-treated, and 6 labetalol-treated patients. Renal plasma flow (RPF) and glomerular filtration rate (GFR) were measured during four consecutive periods, a pre-exercise control period, two exercise periods with loads of 450 kpm/min and 600 kpm/min, respectively, and a post-exercise control period. In the untreated patients RPF and GFR were lower during exercise than in the normotensive control subjects, whereas no significant differences were found at rest. In the propranolol-treated patients the reduction in RPF and GFR during exercise was more pronounced than in the untreated hypertensives. In the labetalol-treated patients however, RPF and GFR were reduced only to the same degree as in the untreated hypertensives. The reduced renal blood flow in propranolol-treated patients may be attributed to a compensatory increase in sympathetic activity caused by an impaired cardiac response to exercise. The lack of reduction in renal blood flow during labetalol therapy could partly be related to alpha-adrenergic blockade in the renal vascular bed induced by labetalol, and partly to the smaller reduction in cardiac output during labetalol than during propranolol therapy.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 33 (1988), S. 549-555 
    ISSN: 1432-1041
    Keywords: verapamil ; sustained release formulation ; hypertension ; renal disease ; kidney function ; angiotensin II ; aldosterone ; arginine vasopressin ; atrial natriuretic peptide ; lipids and lipoproteins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary In 14 patients with arterial hypertension secondary to chronic renal parenchymal disease and impaired renal function, 24-h ambulatory and casual blood pressure readings plasma, angiotensin II, aldosterone, arginine vasopressin and atrial natriuretic peptide, creatinine clearance, plasma lipids and lipoproteins, and body weight were determined after consecutive 3-week periods on placebo and sustained release verapamil 240 mg/day. Verapamil reduced the mean 24-h ambulatory blood pressure from 152/104 to 142/97 mm Hg. Blood pressure was significantly reduced during the daytime and the evening, but not at night. Casual blood pressure was also significantly reduced from 176/106 mm Hg to 154/96 mm Hg. No significant changes were found in the hormones, creatinine clearance, plasma lipids and lipoproteins, heart rate or body weight. The atrial natriuretic peptide level was significantly correlated with the calculated creatinine clearance (r=−0.797). Thus, sustained release verapamil 240 mg as a single daily dose had a moderate hypotensive effect in patients with chronic renal disease without inducing tachycardia, activation of the renin-angiotensin-aldosterone system, or increasing body weight, and without altering renal function and plasma lipids and lipoproteins. The negative correlation between atrial natriuretic peptide and glomerular filtration rate supports the hypothesis that the extracellular volume increases during progression of renal disease.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-1041
    Keywords: Pinacidil ; Renal haemodynamics ; lithium clearance ; angiotensin II ; aldosterone ; atrial natriuretic peptide ; renal tubular function ; vasodilatation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The effects of pinacidil on renal haemodynamics, tubular function evaluated by the lithium clearance technique and the plasma levels of angiotensin II (Ang II), aldosterone (Aldo) and atrial natriuretic peptide (ANP) have been evaluated in 12 healthy volunteers given pinacidil 0.1 mg/kg IV in comparison with a placebo given to 13 different healthy volunteers. Pinacidil induced significant reductions in glomerular filtration rate (−5%), renal plasma flow (−12%), urine output (−35%), urinary sodium excretion (−20%), and the fractional excretion of sodium (−17%) and potassium (−29%). Lithium clearance and proximal and distal absolute and fractional reabsorption of sodium were not significantly changed. Ang II and Aldo were significantly increased (80% and 115%, respectively) and ANP was unchanged. The mean arterial blood pressure was not significantly changed by pinacidil, but the heart rate was increased (22%). It is concluded that bolus IV injection of pinacidil in healthy subjects reduced renal blood flow, urine volume and the urinary excretion of sodium and potassium, whereas segmental tubular function was unchanged. The increase in heart rate and activation of the renin-agiotensin-aldosterone system are most likely to be secondary to stimulation of the sympathetic nervous system caused by the vasodilator effect of pinacidil.
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 43 (1992), S. 539-541 
    ISSN: 1432-1041
    Keywords: Atrial natriuretic factor ; ANP-270, P-ANP, NNC-70-0270, pharmacokinetics, assay method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The pharmacokinetics of ANP-270, a 26 amino acid analogue of alpha human natriuretic factor (α-hANF) with a prolonged effect on isolated arterial preparations has been studied in 40 healthy males, in a doubleblind placebo controlled investigation. Placebo or ANP-270 0.3, 1.5 or 3.0 μg/kg were given by intravenous bolus injection, each to groups of 10 subjects. Blood samples were assayed for ANP-270 by a specific sandwich ELISA. The disappearance of ANP-270 from plasma followed a two-compartment decay, with mean distribution and elimination half-lives of 2.6 min (n = 30) and 10.6 min (n=20), respectively. These estimates were similar to those obtained by other investigators for α-hANF. Their brevity explains the lack of a prolonged effect of ANP-270 in vivo compared to α-hANF.
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