Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 43 (1965), S. 1092-1094 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Intratubular pressures were measured by micropuncture in white rats at different times after temporary renal ischemia of 30 to 60 min duration. Despite insufficient reabsorption of fluid in the proximal tubules, lumina were not dilated and pressures not elevated after renal ischemia of 30 min. After ischemic periods of 60 min the tubules were dilated (+50%) and pressures elevated from normal values of 15.3 to 21 Torr. Most significant changes were seen 2 to 3 days after the ischemic period.
    Notes: Zusammenfassung Es wird über intratubuläre Druckmessungen an normalen Rattennieren und an Nieren, die durch eine unterschiedlich lange temporäre Ischämie (30 und 60 min) geschädigt waren, berichtete. Nach einer temporären Ischämie von 30 min kommt es trotz einer tubulären Insuffizienz im proximalen Tubulus weder zu einem intratubulären Druckanstieg, noch zu einer reellen Tubuluserweiterung. Eine Ischämie von 60 min dagegen verursacht einen Druckanstieg von durchschnittlich 6 Torr und eine Tubulusdilatation von 50%. Intratubulärer Druckanstieg und Tubulusdilatation werden auf Mißverhältnis zwischen dem auszuscheidenden Glomerulumfiltrat und dem distalen Tubulusquerschnitt zurückgeführt.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 66 (1988), S. 508-510 
    ISSN: 1432-1440
    Keywords: Nephrectomy ; Hyperfiltration ; Progressive renal failure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We report on a patient who lost one and two-thirds of his kidneys following surgery because of bilateral renal cell carcinoma. The serum creatinine following surgical intervention increased to about 7 mg% and fell to serum values of about 3 mg% in the year after one and two-thirds nephrectomy. The patient's renal function remained stable for 18 months, then it started to deteriorate and the patient developed progressive renal failure with proteinuria. The course of the disease suggests that an intrinsic renal mechanism was operative, which relates to glomerular hyperfiltration following surgical loss of renal tissue.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 60 (1982), S. 651-657 
    ISSN: 1432-1440
    Keywords: Uremia ; cAMP ; lipolysis ; Glucagon ; Uremic metabolic disturbances ; Urämie ; cyclisches AMP ; Glukagon ; Lipolyse
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Vergleichend wurde der Effekt einer intravenös gegebenen Einzeldosis von Glukagon auf das Verhalten der cAMP-Konzentration im Plasma untersucht. Die Untersuchungen erfolgten an 7 gesunden Personen, 10 Patienten mit chronischer Niereninsuffizienz und 10 Patienten, die auf Grund des chronischen Nierenversagens einer Langzeithämodialysebehandlung bedurften. 10 min nach Glukagonanwendung zeigten die urämischen Patienten einen signifikanten (p 〈 0,0001) größeren Anstieg von cAMP im Vergleich zu der Kontrollgruppe. Die Glukosekonzentrationen zeigten nach Glukagon zwischen den beiden Gruppen keine Differenz. Die Lipolyse war in der urämischen Patientengruppe weniger stark ausgeprägt, als bei den Kontrollen (p 〈 0,003). Die Resultate ließen sich nicht auf Unterschiede in der Insulinantwort zurückführen. Die Befunde weisen auf ein unterschiedliches Verhalten der hepatischen Adenylatcyclase und der cAMP-Bildung zwischen gesunden und urämischen Personen hin. Diese Änderungen der cAMP-Aktivität können eine grundsätzliche Rolle bei der Pathophysiologie metabolischer Störungen bei Urämie spielen.
    Notes: Summary The effect of a single, intravenously administered dose of glucagon on plasma cyclic adenoside monophosphate (cAMP) was studied in seven normal subjects, ten patients with chronic renal failure (CRF), and ten patients with terminal renal insufficiency (TRI) receiving long-term haemodialysis treatment (HD). Ten minutes following glucagon administration, uremic patients displayed a significantly (P 〈 0.0001) greater increase in cAMP than control subjects. Glucose levels after glucagon administration did not differ significantly between the normal and uremic groups, and lipolysis was less pronounced in the uremic patients than in the controls (P 〈 0.003). These results could not be attributed to differences in serum insulin response. The findings demonstrate differences in the hepatic adenylate cyclase and cAMP response between normal and uremic subjects. These alterations in cAMP responsiveness may play a role in the pathophysiology of the metabolic disturbances associated with uremia.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1432-1440
    Keywords: Hyperlipidaemia ; Cholesterol ; Triglycerides ; Uraemia ; Regular haemodialysis treatment ; Bezafibrate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Hyperlipidaemia may contribute to the high rate of cardiovascular complications in patients on chronic haemodialysis (CHD). However, possibilities of lipid lowering therapy in CHD are still limited. The applicability of bezafibrate (BF), a recently developed clofibrate analogue, was investigated in patients on CHD with triglyceride and/or total cholesterol levels above 300 mg/dl. The lipid lowering effect was studied in a placebo-controlled trial over 6 months in 19 patients. Long-term effect was followed in six patients over a mean period of 29 months. Elimination half-life and mean therapeutic serum concentration were calculated by 72-h BF serum profiles, obtained after the first drug administration of a single 200-mg dose and during steady state after 12 weeks of treatment. Elimination half-lives were 17 h at start and 22 h after 12 weeks compared with 2 h in subjects with normal renal function. Dose reduction to 200 mg every 3rd day was necessary and resulted in a mean therapeutic serum concentration of 3.4 mg/l, which was similar to 3.0 mg/l of normal subjects, who received the dose optimal for lowering of lipids (200 mg 3 × /day). The protein-bound serum fraction of BF was decreased to 8% in CHD patients, compared with 95% found in normal subjects. BF therapy resulted in a marked reduction of serum triglycerides from 478 mg/dl by 31% and total cholesterol levels from 311 mg/dl by 19% as well as β-Lp-cholesterol from 178 mg/dl by 17%, whereas the initially low α-Lp-cholesterol increased significantly from 18,3 mg/dl by 58%. Under long-term therapy not only continuously low triglyceride and cholesterol levels could be maintained, moreover a further decline (−20% and −7%) could be achieved. Safety laboratory controls, comprising haemoglobin, bilirubin, liver enzymes, CK and albumin, showed no significant changes apart from a slight reversible increase in CK and a decrease in gamma-GT and alkaline phosphatase. Subjective side effects were not reported. Under this dosage schedule, BF therapy was thus effective and safe, improving potentially atherogenic disturbances of lipid metabolism.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 54 (1976), S. 1095-1105 
    ISSN: 1432-1440
    Keywords: Plasma-Noradrenalin ; Essentielle Hypertonie ; β-Sympathicolyse ; Essential hypertension ; Plasma noradrenaline ; Chronic effect of prindolol ; Mechanism of action of beta blockers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary 15 patients (4 females, 11 males, 21 to 55-year old) with mild to moderate essential hypertension (EH) were treated with placebo for two weeks and thereafter with increasing doses of prindolol (15 to 38 mg/day in the mean) and kept on a mean maintenance dosage of 32 mg/day for an average of 16 weeks in all. Blood pressure (BP), heart rate und plasma noradrenaline (PNA) concentrations were measured under standardized conditions (supine, standing, walking) at the end of two weeks on placebo and after the experimental treatment period. The results were compared to those of a group of 15 normotensive untreated control subjects (NS): after an average of 16 weeks on prindolol BP fell from 163/113 mm Hg to 129/91 mm Hg in the mean. PNA levels in EH before prindolol were significantly higher than in NS (supine: 272±22.0 ng/l (mean±SEM) vs. 135±15.1 ng/l, standing: 448±31.9 ng/l vs. 359±18.4 ng/l, walking: 388±22.5 ng/l vs. 234±22.1 ng/l). In EH chronic administration of prindolol led to a significant decrease in PNA concentrations under all the three test conditions to levels which did not differ significantly any more from those derived from NS. The adrenergic response to upright posture reflected in the percentage increase in PNA was significantly less in EH before prindolol when compared to the percentage increase in NS. On prindolol the adrenergic response was not abolished, yet it tended to approach the values found in NS. Before prindolol under resting conditions diastolic BP correlated closely with the corresponding PNA levels (p〈0.01,r=0.66,n=15). This correlation could not be reestablished after prindolol treatment. The decrease in PNA after long-term treatment with prindolol was not correlated to the fall in blood pressure. The decrease in PNA indicates a lower activity of the sympathetic nervous system which may contribute to the antihypertensive effect of prindolol.
    Notes: Zusammenfassung 15 Patienten (4 Frauen, 11 Männer; 21–55 Jahre alt) mit einer leichten bis mittelschweren essentiellen Hypertonie (EH) wurden nach einer 2wöchigen Placeboperiode mit steigenden Dosen von Prindolol behandelt (15–38 mg/die im Mittel) und auf einer Erhaltungsdosis von durchschnittlich 32 mg/die insgesamt 16 Wochen lang gehalten. Blutdruck (BD), Herzfrequenz und Plasmanoradrenalin (PNA)-Konzentration wurden unter standardisierten Bedingungen (liegen, stehen, gehen) am Ende der 2-wöchigen Placeboperiode und nach der experimentellen Behandlungsperiode gemessen. Die Ergebnisse wurden mit denen einer normotensiven, unbehandelten Kontrollgruppe (NS) verglichen. Nach durchschnittlich 16 Wochen Prindololbehandlung fiel der BD von 163/113 mm Hg auf 129/91 mm Hg im Mittel ab. Die PNA-Spiegel lagen bei EH vor Prindolol signifikant höher als bei NS (liegen: 272±22.0 ng/l (mean±SEM) vs. 135±15.1 ng/l, stehen: 448±31.9 ng/l vs. 359±18.4 ng/l, gehen: 388±22.5 ng/l vs. 234±22.1 ng/l). Bei EH führte die chronische Gabe von Prindolol zu einem signifikanten Abfall der PNA-Konzentrationen unter allen drei Testbedingungen auf Spiegel, die sich nicht mehr signifikant von denen der NS unterschieden. Die adrenerge Reaktion auf die aufrechte Körperhaltung, gemessen durch den prozentualen Anstieg der PNA, war signifikant geringer bei EH vor Prindolol, verglichen mit dem prozentualen Anstieg bei NS. Unter Prindolol war die adrenerge Reaktion nicht aufgehoben, sie zeigte sogar die Tendenz, sich den Verhältnissen anzugleichen wie sie bei NS gefunden wurden. Vor Prindolol korrelierte unter basalen Bedingungen der diastolische BD eng mit der entsprechenden PNA-Konzentration (p〈0.01,r=0.66,n=15). Diese Korrelation konnte nach der Prindolol-Behandlung nicht mehr aufgestellt werden. Die Abnahme von PNA nach Langzeitbehandlung mit Prindolol korrelierte nicht mit dem Abfall des BD. Die Abnahme des PNA-Spiegels spricht für eine verminderte Aktivität des sympathischen Nervensystems, die zur antihypertensiven Wirkung von Prindolol beitragen könnte.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 67 (1989), S. 297-303 
    ISSN: 1432-1440
    Keywords: Osteocalcin ; Renal transplantation ; Secondary hyperparathyroidism ; Steroid induced bone disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Osteocalcin serum levels reflect bone turnover. In renal insufficiency secondary hyperparathyroidism and reduced renal clearance might be responsible for elevated serum levels of osteocalcin. Renal transplantation might improve renal osteodystrophy and therefore could influence osteocalcin serum levels. We determined the influence of renal transplantation on osteocalcin levels in 37 consecutive patients (25m/12f) by RIA. Blood samples were collected prior to, 3 days, 28 days, 6 months and 12 months after renal transplantation. Prior to renal transplantation osteocalcin levels were significantly elevated (x±s: 23.4±12.8 ng/ml) compared to healthy volunteers (4.1±1.4 ng/ml). Following renal transplantation osteocalcin decreased significantly (9.4±8.9 ng/ml) 3 days and (7.1±7.8 ng/ml) 28 days. However, 6 and 12 months following renal transplantation the mean osteocalcin level increased again (8.3±5.7 ng/ml, 12.1±15.4 ng/ml). At 6 months 11 and at 12 months only 6 of 37 patients had osteocalcin levels in the normal range. 12 months following renal transplantation 21 out of 37 patients with elevated osteocalcin levels had parathyroid hormone levels above the normal range. Additionally to increased osteocalcin levels patients prior to renal transplantation had elevated alkaline phosphatase. Alkaline phosphatase had following renal transplantation a similar pattern as osteocalcin with initial decrease and secondary increase 6 and 12 months after renal transplantation. Parathyroid hormone was elevated in all patients before renal transplantation. Following renal transplantation mean parathyroid hormone levels fell significantly, however remained above normal range in 57% of these 37 patients. Osteocalcin serum levels correlated positively with alkaline phosphatase (rs=0.43−0.62;p〈0.011) and parathyroid hormone (0.3−0.66p〈0.07). This correlation of osteocalcin with alkaline phosphatase and parathyroid hormone prior to and after renal transplantation suggests that osteocalcin may be a confirmative parameter in renal osteodystrophy in patients on chronic intermittent hemodialysis and following renal transplantation.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 1432-1831
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Keimzahlbestimmung im Harn mit dem Millipore-Filter-Verfahren wird in ihren technischen Einzelheiten ausführlich beschrieben. Die Leistungsfähigkeit der Methode wird unter quantitativen Aspekten in drei verschiedenen Versuchsanordnungen demonstriert. 1. Harnpathogene Keime sind mit dem Millipore-Filter-Verfahren in unterschiedlichen Verdünnungsgraden in den erwarteten Relationen nachweisbar. 2. Das gleiche wie unter 1. gilt auch für Mischkulturen harnpathogener Keime. 3. Keimzählergebnisse sind unter klinischen Bedingungen auch bei Veränderung von Volumen und Verdünnungsgrad reproduzierbar. Dies gilt vor allem für Keimzahlreiche unter 100000 Keimen/ml.
    Notes: Summary The method for quantitative urine culture by use of Millipore Filters is described in detail. The quantitative accuracy of the method is tested under two different experimental conditions. 1. Quantitative results comparable with calculated values were found in varied dilutions of bacteria in common urinary tract infection. 2. In cultures with different bacteria the findings were similar. 3. Quantitative results can be reproduced independent of volume and dilution. This was also found in counts below 100,000 bacteria/ml.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 1432-1041
    Keywords: Amikacin ; gentamycin ; netilmicin ; sisomicin ; tobramycin ; kidney damage ; proximal tubule ; cell membrane ; AAP
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The effect of the aminoglycosides amikacin, gentamicin, netilmicin sisomicin and tobramycin on the proximal tubule of the human kidney was investigated in 78 healthy subjects. Fifteen adults were each given gentamicin, sisomicin or tobramycin 3 mg/kg bodyweight, 10 subjects received netilmicin 3 mg/kg or amikacin 15 mg/kg additionally seven subjects amikacin 10 mg and six subjects netilmicin 6 mg on three consecutive days. The principal enzyme of the brush border membrane of the proximal tubule, alanine aminopeptidase (AAP), was determined enzymatically and immunologically in 24-hour urines. The effects of the various aminoglycosides on the membranes were different. Less of membrane AAP was greatest after amikacin and was least after tobramycin. There was no difference between gentamicin, netilmicin, and sisomicin, which had an effect intermediate between the other two compounds. The elimination of AAP occurred at intervals whicht might possibly have been caused by impairment of cell cycles.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    ISSN: 1432-1041
    Keywords: Nephrotoxicity ; cephamandol ; cephazolin ; cephacetrile ; cephalothin ; brush border enzymes ; urine alanine-aminopeptidase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Cephamandol 6.0 g, cephazolin 6.0 g or cephacetrile or cephalothin 8.0 g were administered as short-term infusions on 3 consecutive days to informed volunteers, who had no history or evidence of impairment of renal funktion. There were 15 subjects in the cephamandol, cephacetrile and cephalothin groups and 14 subjects in the cephazolin group. Alanine-aminopeptidase, a characteristic tubule enzyme, was determined in a 24-hour urine 2 days before administration, during the 3 day administration and on the 4 subsequent days. In addition, alanine-aminopeptidase was also estimated immunologically in concentrated urine with the aid of an anti-brush border antibody. Cephamandol, cephazolin and cephalothin were completely without effect on the proximal tubule. Cephacetrile, on the other hand, showed clear reactions in 9 out of 15 subjects, in the form of elevated AAP activity in urine and in 6 of the cases membrane elimination was demonstrable immunologically. After withdrawal of the medication, the values of the responder group returned spontaneously to normal, i. e. no cumulative effect was detected. These investigations show that elimination of alanine-aminopeptidase in the urine is a very sensitive index of the action of cephalosporins on renal tubules.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 44 (1993), S. S33 
    ISSN: 1432-1041
    Keywords: Nephrotoxicity ; Cell repair ; drug induced nephrotoxicity ; growth factors ; specific proteinuria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Nephrotoxic drugs may account for approximately at least 20 % of clinically observed cases of acute renal failure in whom tubular lethal or sublethal damage is a predominant finding. Acute toxic tubular cell injury is characterized by loss of cellular polarization, intrinsic energy deficiency, calcium overload, release of toxic proteases and free oxygen radicals, derangement of the cytoskeleton, and vacuolar transformation of brush border microvilli. These events may finally lead to irreversible cell death. Shedding of membrane enzymes and cytoskeletal components in urine (kidney tissue proteinuria) may serve as a noninvasive early marker for assessing tubular cell injury. Successful recovery of renal function depends on early repair of lethally or sublethally damaged nephrons, in which intrinsic nephrogenic adaptive and proliferative responses cooperate in concert with auto/para/-juxtacrine growth promoting factors and cytokines. Exogenously administered growth factors may enhance renal cell recovery, as shown in animal models. Increased expression of immediate early genes in tubular cells after renal injury reflects the ongoing mitogenic activity necessary for reepithelialization and remodeling (new, polarized, differentiated cells). Further progress in understanding the molecular mechanisms of renal tubular injury will probably influence the diagnostic modalities and therapeutic approaches to acute drug induced renal failure.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...