Composition and method for detecting cancer with technetium labeled antibody fragments

Patent · Tue Oct 23 00:00:00 EDT 1984

OSTI ID:6168194

Burchiel, S W; Crockford, D R; Rhodes, B A

F(ab')/sub 2/ or Fab fragments of antibodies to: (a) human chorionic gonadotropin (hCG), hCG alpha subunit, hCG beta subunit, or an hCG-like material; or (b) other tumor specific or tumor associated molecules, to include carcinoembryonic antigen (CEA), alpha fetoprotein (AFP), human melanoma associated antigens, human sarcoma associated antigens or other antigens, are radiolabeled with technetium-99m (Tc-99m). When the F(ab')/sub 2/ or Fab fragments of antibody to such tumor associated antigens are injected intravenously into a patient, the radiolabeled composition accumulates at tumor sites. The accumulation of the cancer seeking radiopharmaceutical at tumor sites permits detection by external gamma scintigraphy. Thus, the composition is useful in the monitoring, localization and detection of cancer in the body. In an alternative composition, a double antibody approach to tumor localization using radiolabeled F(ab')/sub 2/ or Fab fragments is utilized. In this approach, a tumor specific antibody in the form of IgG, F(ab')/sub 2/ or Fab is first administered to a patient intravenously. Following a sufficient period of time, a second antibody in the form of F(ab')/sub 2/ or Fab is administered. The second antibody is radiolabeled with Tc-99m and has the property that it is reactive with the first antibody. This double antibody method has the advantage over a single antibody approach in that smaller tumors can be localized and detected and that the total amount of radioactive trace localized at the cancer site is increased.

• Assignee: Nuc-Med Inc. University Patents Inc.
• Patent Number(s): US 4478815
• OSTI ID: 6168194
• Resource Relation: Patent File Date: Filed date 2 Jun 1981; Other Information: PAT-APPL-269404
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
MELANOMAS
SCINTISCANNING
TRACER TECHNIQUES
RADIOPHARMACEUTICALS
CHEMICAL COMPOSITION
SARCOMAS
ANTIBODIES
ANTIGEN-ANTIBODY REACTIONS
CARCINOEMBRYONIC ANTIGEN
TECHNETIUM 99
ANTIGENS
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ISOTOPE APPLICATIONS
ISOTOPES
LABELLED COMPOUNDS
NEOPLASMS
NUCLEI
ODD-EVEN NUCLEI
RADIOISOTOPE SCANNING
RADIOISOTOPES
TECHNETIUM ISOTOPES
YEARS LIVING RADIOISOTOPES
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