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Sökning: L773:0020 708X OR L773:1878 1284

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  • Persson, Bertil R.R., et al. (författare)
  • Labeling plasmin with technetium-99m for scintigraphic localization of thrombi
  • 1977
  • Ingår i: International Journal of Applied Radiation and Isotopes. - 0020-708X. ; 28:1-2, s. 97-104
  • Tidskriftsartikel (refereegranskat)abstract
    • A detailed study has been made of the method for labeling plasmin (NOVO Indstri A/S Denmark) with 99mTc in order to prepare a radioactive indicator for early scintigraphic visualization of thrombi and tumors. The best method found for preparing 99mTc-plasmic involved the reduction of 2.5 ml 99mTc-pertechnetate solution with 0.5 ml of 4 mM SnCl2, 2 M NaCl and 70 mM HCl. This mixture was then added to 5 mg of plasmin to give a final pH of about 2. After 60 min of reaction the labeling efficiency was 80-90% as determined by gel chromatography column-scanning. The labeling kinetics and influence of pH, concentration of SnCl2, NaCl, plasmin and lysine were studied. The enzymatic activity of plasmin was reduced by less than 15% by the labeling process. Preliminary experiments in rabbits with artificially induced thrombi indicate accumulation of 99mTc activity in the same areas as 125I-fibrinogen after the administration of 99mTc-plasmin.
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