Tumor localization and therapy with labeled antibody fragments specific to tumor-associated markers
First Claim
1. A method for detecting and localizing a tumor which either produces or is associated with a cytoplasmic, intracellular or cell-surface marker substance which comprises injecting a human subject parenterally with a marker-specific fragment obtained by cleavage of an antibody specific to said marker substance and radiolabeled with a pharmacologically inert radioisotope capable of detection using a photoscanning device, and subsequently scanning with said device to detect and locate the site or sites of uptake of said labeled antibody fragment by said tumor.
1 Assignment
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Accused Products
Abstract
Methods are provided for using radiolabeled antibody fragments specific to tumor-associated markers for detection, localization and therapy of tumors. Mixtures of labeled fragments with varied specificity or multivalent hybrid fragments permit detection and localization of more than one tumor or tumor cell type. Antibodies and injectable compositions for use in the methods of the invention are also provided.
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Citations
50 Claims
- 1. A method for detecting and localizing a tumor which either produces or is associated with a cytoplasmic, intracellular or cell-surface marker substance which comprises injecting a human subject parenterally with a marker-specific fragment obtained by cleavage of an antibody specific to said marker substance and radiolabeled with a pharmacologically inert radioisotope capable of detection using a photoscanning device, and subsequently scanning with said device to detect and locate the site or sites of uptake of said labeled antibody fragment by said tumor.
- 25. A method for detecting and localizing a tumor which either produces or is associated with a cytoplasmic, intracellular or cell-surface marker substance, which comprises injecting a human subject parenterally with two marker-specific fragments, one fragment being a marker-specific fragment obtained by cleavage of a first antibody specific to a first tumor associated marker and the second fragment being a marker-specific fragment obtained by cleavage of a second antibody specific to a second, different tumor-associated marker, each of said fragments being radiolabeled with a pharmacologically inert radioisotope capable of detection using a photoscanning device, and subsequently scanning with said device to detect and locate the site or sites of uptake of one or both of said labeled fragments by said tumor.
- 31. A method for detecting and localizing a tumor which either produces or is associated with a cytoplasmic, intracellular or cell-surface marker substance, which comprises injecting a human subject parenterally with an F(ab'"'"')2 hybrid formed from two chemically joined Fab'"'"' fragments, said fragments being a first marker-specific Fab'"'"' fragment obtained by cleavage of an antibody specific to a first tumor-associated marker and a second, different marker-specific Fab'"'"' fragment obtained by cleavage of a second antibody specific to the same or different tumor-associated marker, said hybrid being radiolabeled with a pharmacologically inert radioisotope capable of detection using a photoscanning device, and subsequently scanning with said device to detect and locate the site or sites of uptake of said labeled hybrid by said tumor.
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40. A method of tumor radiotherapy, which comprises parenterally injecting into a human subject having a tumor which produces or is associated with a cytoplasmic, intracellular or cell-surface marker substance an effective tumor reducing amount of a marker-specific fragment obtained by cleavage of an antibody specific to said marker substance and radiolabeled with a pharmaceutically inert, radiotherapeutically effective radioisotope.
- 41. A method of tumor radiotherapy, which comprises parenterally injecting into a human subject having a tumor which either produces or is associated with at least one cytoplasmic, intracellular or cell-surface marker substance an effective tumor reducing amount of an F(ab'"'"')2 hybrid formed from two chemically joined Fab'"'"' fragments, said fragments being a first marker-specific Fab'"'"' fragment obtained by cleavage of an antibody specific to a first tumor-associated marker and a second, different marker-specific Fab'"'"' fragment obtained by cleavage of a second antibody specific to the same or different tumor-associated marker, said hybrid being radiolabeled with a pharmacologically inert, radiotherapeutically effective radioisotope.
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44. An injectable composition, which comprises:
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(a) a marker-specific fragment obtained by cleavage of an antibody specific to a cytoplasmic, intracellular or cell-surface marker substance which is provided or associated with a tumor, said fragment being radiolabeled with a pharmacologically inert radioisotope capable of detection using a photoscanning device; and (b) a pharmaceutically acceptable injection vehicle. - View Dependent Claims (45, 46, 50)
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47. An injectable composition which comprises:
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(a) an F(ab'"'"')2 hybrid formed from two chemically joined Fab'"'"' fragments, said fragments being a first marker-specific Fab'"'"' fragment obtained by cleavage of an antibody specific to a first tumor-associated marker and a second different marker-specific Fab'"'"' fragment obtained by cleavage of a second antibody specific to the same or different tumor associated marker, said hybrid being radiolabeled with a pharmacologically inert radioisotope capable of detection using a photoscanning device; and (b) a pharmaceutically acceptable injection vehicle. - View Dependent Claims (48)
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49. A method of tumor radiotherapy, which comprises parenterally injecting into a human subject having a tumor which produces or is associated with a cytoplasmic, intracellular or cell-surface marker substance an effective tumor reducing amount of a marker-specific fragment obtained by cleavage of an antibody specific to said marker substance and radiolabeled with a pharmacologically inert radioisotope capable of detection with a photoscanning device, said labeled fragment further containing in chemical combination an addend containing at least five atoms of boron with at least a natural abundance of Boron-10 isotope;
- wherein the location of said tumor is determined using said photoscanning device, and a beam of thermal neutrons is then directed at said tumor location.
Specification