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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Research in experimental medicine 159 (1973), S. 266-275 
    ISSN: 1433-8580
    Keywords: Kidney-transplantation ; Xenotransplantation ; Closely related species ; Delayed hyperacute rejection ; Nierentransplantation ; Xenotransplantation ; Nah verwandtes System ; Verzögert hyperakute Abstoßung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Um das Verhalten vascularisierter Xenotransplantate zwischen Tieren enger zoologischer Verwandtschaft zu untersuchen, wurden Katzennieren „en bloc“ auf Hunde transplantiert. In diesem System zeigte sich, mit einer Funktionsdauer von 15–24 Std, der Typ einer verzögert hyperakuten Abstoßung. Der Abfall des Komplements im peripheren Blut und das Auftreten von Katzenprotein im Urin schon während der ersten Stunden deutet auf einen früheren Beginn dieser Reaktion hin, während die endgültige Zerstörung des Transplantates durch unspezifische, jedoch von der Antigen-Antikörper-Reaktion gestartete Mechanismen bedingt zu sein scheint. Den Empfängern dieser Ersttransplantate wurden 3 Wochen später mit einer Ex vivo-Hämoperfusion eine zweite Katzenniere angeschlossen. Innerhalb von 15–20 min waren diese Nieren unter dem Bild einer typischen hyperakuten Abstoßung zerstört.
    Notes: Summary To study the survival time of kidney-transplants in closely related species cat kidneys were transplanted to the iliac vessels of mongrel dogs by an “en bloc” method. A type of delayed hyperacute rejection was observed. The function time of the transplant kidneys ranged from 15 to 24 hrs. The decrease of complement activity and the appearance of cat-tissue protein in serum and urine samples show that the rejection began at an early stage. Since the antigen-antibody reaction seems to be finished after 6 hrs, indicated by an increase of complementactivity, the final loss of function may be effected by an unspecific reaction. Recipients survived after removal of the transplant and got a second kidney graft 3 weeks after the first set. These kidneys were rejected within 15–20 min with the sign of typical hyperacute rejection.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1434-0879
    Keywords: Hypothermia ; Ischaemia ; Renal blood flow ; Xenon wash out technique ; Sequential renal scanning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In 11 mongrel dogs both kidneys have been subjected to a 2 h ischaemic period. One kidney was cooled by perfusing the renal artery at 4°C while the contralateral normothermic kidney was clamped for 2 h. Studying the renal blood flow using the Xenon wash out technique, sequential renal scanning and angiography, marked differences between hypo- and normothermic ischaemia kidneys were observed. One or two hours following hypothermic perfusion a marked decrease of blood flow in the first compartment and vasoconstriction was evident, while within this period following normothermic ischaemia an enhanced renal blood flow was observed. After 24 h renal blood flow and renal function tested by 131I-Hippuran clearance returned to normal values. Angiographic studies corresponded to the preoperative findings. In contrast, normothermic ischaemia kidneys showed a decreased renal blood flow, impairment of kidney function in isotope studies and pathological angiographic changes.
    Type of Medium: Electronic Resource
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