title: [111-Indium-labeled thrombocytes in the diagnosis of acute kidney transplant rejections and in monitoring the therapy of rejection reactions with prostacyclin].
abstract: 33 patients were examined daily under a gamma camera after weekly injections of 111-In-labelled autologous platelets over a period of at least 4 weeks after transplantation. A group of 33 patients with long-term stable and well-functioning grafts served as controls. By means of a computerized recording technique, platelet trapping in the graft was measured and expressed as platelet-uptake index (PUI). The method worked well for the early diagnosis of acute rejection signified by an increase in PUI, accompanied by a shortening of platelet half life (t/2). 6 patients suffering from acute rejection received infusions of prostacyclin in addition to conventional high-dose methylprednisolone therapy. In 4 cases the PUI decreased again and an improvement in graft function was observed. Prostacyclin infusion treatment was applied also in 12 patients with histologically-proven chronic transplant rejection. Decreased platelet consumption by the graft and a temporary improvement in transplant function were achieved. We suggest that prostacyclin could enrich the possibilities of anti-rejection treatment by providing a tool for the suppression of platelet trapping in the graft. The platelet scan served as a useful method for the early detection of acute rejection, as well as the monitoring of prostacyclin anti-rejection treatment.
mesh_terms: D000208:Acute Disease; D000328:Adult; D001792:Blood Platelets / Q000000981:diagnostic imaging* / Q000187:drug effects; D011464:Epoprostenol / Q000494:pharmacology / Q000627:therapeutic use*; D005260:Female; D006084:Graft Rejection / Q000187:drug effects*; D006801:Humans; D007204:Indium; D016030:Kidney Transplantation; D008297:Male; D011184:Postoperative Period; D011868:Radioisotopes; D011877:Radionuclide Imaging
chemical_list: D011868:Radioisotopes; D007204:Indium; D011464:Epoprostenol
vernacular_title: 111-Indium-markierte Thrombozyten in der Diagnostik von akuten Nierentransplantatabstossugen und zur Observierung der Therapie von Abstossungsreaktionen mit Prostacyclin.