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  • 1
    ISSN: 1432-1440
    Keywords: Urodilatin (CDD/ANP-95-126) ; Cardiodilatin (CDD/ANP-99-126) ; Atrial natriuretic peptide ; Polypeptide hormone ; Therapy ; Acute renal failure ; Heart transplantation (HTx) ; Cyclosporin A
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Renal failure after heart transplantation (HTx) still remains a serious problem, especially when cyclosporin A is used for immunosuppression in the early postoperative therapy. To preserve good renal function without reducing immunosuppressive cyclosporin A treatment, we administered urodilatin (CDD/ANP-95-126) in a long-term, low-dose infusion in addition to the usual medication after heart transplantation. From November 1990 to June 1991, 51 patients (46 male and 5 female; mean age 48 years) were treated with a 620 ng/kg bw·min infusion for 96 h after HTx. The renal function and hemodynamic parameters of these urodilatin-treated patients were compared in this sequential study with 40 patients (33 male and 7 female; mean age 49 years) who had undergone HTx previously from May to November, 1990, as controls. In this phase IIa study, both groups did not differ significantly with respect to age, sex, indication for HTx, and preoperative renal function. In comparison with controls patients treated with urodilatin had a significantly better renal function: a reduction in the peak plasma creatinine (PC values day 4 : 1.5 ± 0.11 vs. 2.19 ± 0.19 mg/dl; P = 0.002), a lower peak serum urea (SU values day 4 : 109 ± 8 vs. 154.7 ± 8.94 mg/dl ; P = 0.0036), and a lower incidence of hemodialysis (6% vs. 10%) were observed. Adequate diuresis was maintained in spite of the reduction of furosemide by more than 60% (P = 0.005) on each day of urodilatin infusion in comparison with controls. The mean central venous pressure was significantly lower by about 50% (P = 0.02) during the administration of urodilatin in spite of reduced vasodilator medication with nitroglycerin. From this phase IIa study, we may conclude that urodilatin could be an important drug in intensive care treatment. For patients undergoing HTx, this peptide seems to be indicated for the improvement of renal function and cardiovascular status, especially in postoperative therapy using high-dose cyclosporin A treatment.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 34 (1978), S. 1432-1433 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Adenylate cyclase and phosphodiesterase were prepared from brain slices from guinea-pig. The specific acitivity of adenylate cyclase declined rapidly with increasing incubation time of tissue slices, while phosphodiesterase activity was almost uneffected by the incubation of brain slices.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-2013
    Keywords: Atrial natriuretic peptide ; Kidney ; Renal natriuretic peptide ; Sodium excretion ; Urodilatin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Urodilatin, a renal natriuretic peptide that is an analogue to circulating atrial natriuretic peptide [α-ANP (99-126)], is measurable with a highly specific and sensitive radioimmunoassay. While most ANP antibodies cannot distinguish between urodilatin and other ANP analogues, the polyclonal urodilatin antibody specifically measures human urodilatin without any cross-reactivity to other ANP analogues. Urodilatin is not detected in blood from healthy volunteers nor from cardiac patients. Urinary urodilatin accounts for only a part of total urinary ANP immunoreactivity. Urodilatin excretion closely parallels sodium excretion in response to an acute volume load while changes in urinary immunoreactive ANP excretion do not reflect this renal response. We conclude that specific urodilatin assays are required to explore further the physiological role of the renal natriuretic peptide.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 287 (1975), S. 289-296 
    ISSN: 1432-1912
    Keywords: Cyclic AMP ; Nervous Tissue ; α-Receptor ; Calcium Ions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In guinea-pig cerebral cortical slices cyclic AMP concentrations increase during incubation with histamine+noradrenaline. After 10 min of incubation the levels of cyclic AMP start to decline. When calcium ions are omitted from the incubation medium, cyclic AMP levels do increase to a greater extent under the same conditions and do not drop during 30 min incubation. In the presence of calcium ions cyclic AMP synthesis can not be elicited by noradrenaline alone. In calcium-free Krebs-Ringer solution a pronounced effect of noradrenaline on cyclic AMP levels is observed. This effect of noradrenaline is shown to be mediated by a classical α-type receptor. 5-Hydroxytryptamine, prostaglandin E 1 and dopamine do not significantly enhance cyclic AMP formation in guinea-pig brain slices in either the presence in, or the absence of calcium ions from the incubation medium. Under depolarizing conditions of incubation the stimulatory effect of ouabain or 125 mM K+ is blocked in a calcium-free medium, while with the depolarizing agent veratridine no significant reduction of cyclic AMP formed during incubation in a calcium-free medium is obtained.
    Type of Medium: Electronic Resource
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