Abstract:
Novel metal binding ligands are disclosed that may be coupled to peptides for use in methods of diagnosis and therapy. Peptides containing the ligands are produced using a method wherein ligand introduction or cyclization can be conducted at any point during the synthesis of the peptide. Such peptide derivatives are readily labeled with radiometals, such as isotopes of rhenium or technetium, while retaining their ability to tightly bind specific peptide receptors.
Abstract:
A support material is conjugated to an affinity material to produce an affinity matrix. The affinity matrix is contacted with a biological sample containing a receptor so that the receptor specifically binds to the affinity material portion of the affinity matrix. Unbound portions of the biological sample are removed, and the receptor specifically bound to the affinity matrix is analyzed by mass spectrometry, optionally with recovery of the receptor or receptor-affinity material complex for mass spectrometry analysis and recovery of the receptor for X-ray crystallographic analysis.
Abstract:
Chimeric and humanized LL2 monoclonal antibody, isolated DNAs encoding these antibodies, vectors containing the DNA and conjugates of chimeric and humanized chimeric LL2 antibodies with cytotoxic agents or labels for use in therapy and diagnosis of B-cell lymphomas and leukemias.
Abstract:
A chimeric antibody-agent conjugate for targeting foci of leucocyte accretion comprises a recombinant chimera having an antigen-beinding hypervariable region which binds specifically to granulocytes, and a constant region of a human immunoglobulin having an Fc portion with high affinity for receptors on human mononuclear lymphoid cells, said chimera being conjugated to at least one diagnostic agent or therapeutic agent. A method for targeting an imaging or therapy agent to an inflammatory or infectious lesion comprises injecting a mammal parenterally with an effective amount for targeting of the above chimeric anti-leukocyte conjugate.
Abstract:
A method for radiolabelling a protein with a radioisotope of technetium or rhenium comprises the steps of contacting a solution of a protein comprising a plurality of adjacent free sulfhydryl groups, or in particular cases, intact protein containing at least one disulfide group, with stannous ions, and then with radiopertechnetate or radioperrhenate, the amount of stannous ion being sufficient to substantially completely reduce the radiopertechnetate or radioperrhenate, and recovering radiolabelled protein. Methods of imaging and methods of radiotherapy employing radiolabelled proteins produced by this method are also disclosed, as are kits for radiolabelling antibodies and antibody fragments.
Abstract:
Methods are described for conjugating radioiodinated peptides or carbohydrate structures to proteins with improved yields and qualities of conjugates. In one method, specially designed radioiodinated bifunctional peptides containing nonmetabolizable bonds such as amide bonds are coupled to cell targeting protein. In a second method, radioiodinated nonmetabolizable bifunctional peptides, which also contain aminopolycarboxylates, are coupled to protein. In a third method, radioiodinated bifunctional aminopolycarboxylates are coupled to protein. In a fourth method, a hydrazide-appended protein is coupled to a radioiodinated carbohydrate or a thiolated protein is coupled to a hydrazide-appended and radioiodinated carbohydrate. In a fifth method a monoderivatized cyanuric chloride is used to conjugate thiolated protein. Radioiodinated residualizing protein conjugates made by these methods are particularly stable in vivo and are suitable for radioimmunodetection and radioimmunotherapy.
Abstract:
A conjugate of a toxin and a cytokine, and a fusion protein comprising a bispecific antibody that has a first specificity for a cell marker specific to a malignant cell and a second specificity for a region of IL-15 alpha , each optionally further comprising a radionuclide, are useful therapeutic reagents for treating leukemias and lymphomas.
Abstract:
An in vivo method for delivering a diagnostic or therapeutic agent to a target site in a mammal, wherein a targeting species including a targeting moiety and a diagnostic or therapeutic agent or a binding site for a subsequently administered diagnostic or therapeutic agent conjugate, the targeting moiety having a primary binding site whereby it specifically binds to the target, is administered and allowed to accrete at the target site, is improved by injecting into the circulatory system of the mammal a clearing agent that binds to the primary binding site of the targeting species, whereby non-localized primary targeting species is cleared from circulation. The method is especially useful in pretargeting methods because the clearing agent does not remove the primary targeting species or block secondary binding sites of the primary targeting species.
Abstract:
PEG-modified-Tc-99m-radiolabeled antibody fragments are useful for radioimmunodetection of tumors and infectious lesions and display striking reductions in renal uptake and retention of radioisotope compared to non-PEG-modified fragments.
Abstract:
Methods and kits for detecting lesions and compositions and their use for treating lesions in a patient are provided. The methods use multibiotin and/or multiavidin-polymer conjugates to achieve amplification of targeting at the site of the lesion.