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  • Adenosintriphosphat  (1)
  • Rejection  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Pflügers Archiv 322 (1971), S. 95-108 
    ISSN: 1432-2013
    Schlagwort(e): Cardiac Muscle ; Anoxia ; 2,4-Dinitrophenol ; Adenosine Triphosphate ; Action Potential ; Herzmuskel ; Anoxie ; 2,4-Dinitrophenol ; Adenosintriphosphat ; Aktionspotential
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The sensitivity of guinea-pig papillary muscle transmembrane electrical activity to alterations in medium glucose concentration increased with time of incubation under anoxic conditions. DNP at a concentration of 10−4 M produced a decrease in fresh papillary muscle action potential duration comparable to that produced by low medium glucose in muscle after prolonged anoxic incubation. 10−6 M DNP did not increase the decline in action potential duration of fresh papillary muscle caused by anoxic incubation in medium containing 5 mM glucose. The ATP content of ventricular strips fell to about 30% control during 60 min of anoxia but was maintained at a significantly higher level when the medium contained 50 mM rather than 5 mM glucose. In the presence of 10−4 M DNP the ATP content of strips fell to 25% control in 10 min and the increased loss was maintained throughout 60 min. During 120 min incubation in medium containing 5 mM glucose and oxygen, the ATP of strips was maintained but the action potential duration declined to 50% control. The results support the proposal that a close association exists between glycolytically produced ATP and transmembrane electrical activity. The effects of DNP on transmembrane electrical activity may be explained by an active depletion of ATP in addition to its uncoupling activity.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1432-2277
    Schlagwort(e): Key words Neoral ; Sandimmune ; Cyclosporine ; Liver transplantation ; Rejection
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract We compared results using Neoral versus Sandimmune, each in combination with steroid and azathioprine immunosuppression, in primary liver transplantation recipients. There were 15 patients in each group with similar demographic distributions. Intravenous cyclosporine was stopped at 4.3 ± 1.9 days in the Neoral group vs 7.8 ± 4.9 days in the Sandimmune group (P 〈 0.025). Cyclosporine levels in the first 10 days were higher (mean 306 ng/ml vs 231 ng/ml) in the Neoral group than the Sandimmune group (P 〈 0.05). The Neoral dose was less than the Sandimmune dose (mean 5.5 ng/kg per day vs 7.9 ng/kg per day) to achieve these levels in that time period (P 〈 0.05). Two patients (13 %) experienced three episodes of biopsy-proven rejection in the Neoral group compared to nine patients (60 %) with 12 episodes of rejection in the Sandimmune group (P 〈 0.025). Incidences of neurological and renal complications were similar between the groups. Infections requiring treatment were also similar. Liver function, renal function, and marrow function, evaluated at days 7, 14, 21, 28, and 2, 4, 6, and 12 months post-transplant, were not different between the groups. In summary, shorter use of intravenous cyclosporine and quicker stabilization of trough cyclosporine levels was achieved with Neoral than with Sandimmune. In the early posttransplant period, higher levels with lower doses were achieved with Neoral than with Sandimmune. In our experience, the incidence of rejection was lower with Neoral than with Sandimmune. There were similar lengths of hospitalization, mortality, adverse events, retransplantation, and similar liver, renal, and marrow function up to 1 year posttransplantation. Because of this experience, we continued to use Neoral in a total of 59 primary liver transplant recipients. We have not used intravenous cyclosporine in the last 44 patients. Follow-up was a mean of 11.4 months, ranging from 1 to 27 months. The incidence of rejection was 24 % in these 59 patients compared to our historical experience of 70 % using Sandimmune.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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