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Therapeutic and diagnostic processes using isotope transfer to chelator-target recognition molecule conjugate

  • US 4,767,609 A
  • Filed: 01/23/1987
  • Issued: 08/30/1988
  • Est. Priority Date: 01/30/1984
  • Status: Expired due to Term
First Claim
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1. An in vivo diagnostic method, which comprises:

  • (1) forming a diagnostic agent labeled with a radioactive metal ion by contacting(i) an unlabeled diagnostic agent comprising(a) a molecularly recognizable portion attached to(b) a chelating portion capable of substantially chelating with said radioactive metal ion, wherein said chelating portion is not a part of said molecularly recognizable portion, with(ii) an ion transfer material having said radioactive metal ion bound thereto and having a binding affinity for said radioactive metal ion less than the binding affinity of said chelating portion for said radioactive metal ion.wherein, prior to said contacting, said chelating portion is unchelated or is chelated with a second metal having a binding affinity with said chelating portion less than the binding affinity of said radioactive metal ion, whereby a radiolabeled diagnostic agent is formed by said contacting; and

    (2) separtating, if necessary, said ion transfer material from said radiolabeled diagnostic agent;

    (3) administering said agent to a human or animal; and

    (4) detecting radiation emitted by said radioactive metal ion.

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