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  • 1985-1989  (3)
  • plasma renin activity  (2)
  • criticalmicelle concentration  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Renal kallikrein in diabetic patients with hypertension accompanied by nephropathy (1986)
    Springer
    Diabetologia 29 (1986), S. 162-167 
    Details
    ISSN: 1432-0428
    Keywords: Renal kallikrein ; urinary kallikrein excretion ; diabetes mellitus ; hypertension ; nephropathy ; plasma aldosterone concentration ; plasma renin activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We measured the 24-h excretion of urinary kallikrein in 27 patients with Type 2 (non-insulin-dependent) diabetes and in 10 normal control subjects. Mean (± SD) kallikrein excretion in diabetic patients with nephropathy (6.2±2.4 naphthyl units (NU)/day,n=13) was significantly lower than in control subjects (12.8±3.4NU/day,p〈0.01) and in diabetic patients without nephropathy (9.4±3.4NU/day,n=14,p〈0.05). Kallikrein excretion in hypertensive diabetic patients with nephropathy (5.1±1.6 NU/day,n=8) was significantly lower (p〈0.05) than in normotensive patients with nephropathy (8.3±2.1 NU/day,n=5). There were no significant differences in kallikrein excretion rate (24-h excretion of urinary kallikrein/24-h creatinine clearance) among control subjects (9.9±4.3 NU/ml), diabetic patients with (9.0±3.2 NU/ml) and without (9.3±3.5 NU/ml) nephropathy. However, kallikrein excretion rate in hypertensive diabetic patients with nephropathy (7.7±3.3 NU/ml) was significantly lower (p〈0.05) than in normotensive diabetic patients with nephropathy (11.8 ±2.0 NU/ml,n=10). Respective basal and post-stimulated (with intravenous furosemide 40 mg plus 60 min ambulation) plasma aldosterone concentrations measured in control subjects and in hypertensive diabetic patients with nephropathy were similar and increased to the same extent in the 2 groups (5.5±3.2 versus 5.3±3.2 and 9.3±2.6 versus 10.5±3.4 ng/ml), although the respective plasma renin activity tended to be lower in diabetic patients than in control subjects (0.7±0.6 versus 1.3±0.9 and 1.8±1.8 versus 3.0±2.6 ng−1 · ml−1 · h−1). The results indicate that urinary kallikrein excretion is decreased in hypertensive diabetic patients with nephropathy, and that the decrease might not be attributable to an altered renin-aldosterone system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02427087
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of dilevalol, an R, R-isomer of labetalol, on blood pressure and renal function in patients with mild-to-moderate essential hypertension (1988)
    Springer
    European journal of clinical pharmacology 35 (1988), S. 9-15 
    Details
    ISSN: 1432-1041
    Keywords: dilevalol ; hypertension ; labetolol R-R-isomer ; renal function ; plasma renin activity ; plasma aldosterone ; side-effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The effects of oral dilevalol (an R, R-isomer of labetalol), a new β-adrenoceptor blocker with β2-receptor stimulating and α-recepter blocking properties on blood pressure, renal function, plasma renin activity (PRA) and plasma aldosterone have been studied in 15 patients with mild-to-moderate essential hypertension treated with it for 6 weeks. Two patients with apparent treatment failure and one patient who developed muscle pain and cramps, and had an elevated creatine phosphokinase level, were excluded from the study. Dilevalol monotherapy 100 mg once daily for 6 weeks significantly lowered both the systolic and diastolic blood pressure compared to placebo. Total renal vascular resistance was significantly reduced, and RBF and GFR remained unchanged. Dilevalol significantly decreased PRA. The results suggest that prolonged daily treatment with dilevalol preserves renal function and produces a concomitant hypotensive action in patients with mild-to-moderate essential hypertension. The ancillary pharmacological properties of dilevalol rather than PRA suppression may be relevant to its renal effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00555500
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Hemolytic activity of polyoxyethylene cholesteryl ethers (1987)
    Springer
    Colloid & polymer science 265 (1987), S. 943-949 
    Details
    ISSN: 1435-1536
    Keywords: Polyoxyethylene cholesterylethers ; hemolysis ; bovineerythrocyte ; criticalmicelle concentration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Hemolytic activity of nonionic surfactants, polyoxyethylene cholesteryl ethers, C27H45O(CH2CH2O) n H (Chol-E n ,n=, 25, 30, 50) and polyoxyethylene dihydrocholeseryl ethers, C27H47O(CH2CH2O) n H (DHChol-E n ,n=15, 30 50) were measured, changing the concentration of surfactant and erythrocyte at 37 °C. Maximum hemolytic activity was observed in these cholesteryl derivatives with 25–30 oxyethylene units. The time course of hemolysis was also measured as a function of the concentrations of surfactant and erythrocyte. Hemolysis started after a certain induction period,τ, and then apparently proceeded as a first-order reaction with respect to the erythrocyte concentration. The surfactant inducing 50% hemolysis at low concentration had a smallτ value and large rate constant. The maximum amount of adsorption without inducing hemolysis,a 0, decreased with increasing polyoxyethylene chain length. Chol-E25 has the maximum activity for the solubilization of egg yolk lecithin at 37 °C. Based on these results, the mechanism of hemolysis by these surfactants was quantitatively discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412395
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    Paper (German National Licenses)
    Fulltext
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