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- W1521509742 abstract "Fab fragments of monoclonal antibodies (MoAb) to melanoma, radiolabeled with 131I, were evaluated as diagnostic reagents to determine their ability to localize systemic--MoAb injected intravenously (IV)--or nodal metastatic disease--injected subcutaneously (SQ) at a site proximal to draining lymph nodes. Sixty-one scans were performed (40 IV, 21 SQ) in 59 patients who had injections of 0.2-50 mg of 131I coupled (0.2-12 mCi) antibody. These included 48.7, which identifies a high molecular weight antigen (HMW), or 96.5, which identifies a transferrin like molecule, p97. 125I coupled nonspecific Fab 1.4, reacting with murine leukemia virus, or the whole antibody BL3, reactive with a human B cell idiotypic determinant, was generally used in tandem with the patients injected SQ as a nonspecific control. All patients had immunohistochemical studies performed on biopsied lesions and demonstrated binding to the antibodies injected. Of the IV patients, 22/38 (58%) had (+) scans, 13 at SQ or nodal sites, four at visceral sites, and five at visceral and SQ sites. Patients with clinical stage II disease had SQ injection of MoAb, including 11 additional patients injected with the whole antibody 9.2.27 (anti-HMW) labeled with 111In (6 patients) or 131I (5 patients). Nodal dissection was performed 2-4 days later. All 111In coupled antibodies demonstrated excellent nodal delineation without specific identification of tumor deposits. Of the 21 patients injected SQ with MoAb, 17 had confirmed tumor in nodes. Of patients injected with Fab fragments, 4/8 (50%) had specific uptake of MoAb, although only two were successfully imaged. Increased uptake of antimelanoma antibodies was observed in some patients in lymph nodes not containing tumor and was possibly related to antigen shedding. Clearance of labeled antibody from the injection site occurred with a half life of 16-50 hours. Toxicity was limited to local discomfort at the site of SQ injection. Melanoma metastases can be identified with IV or SQ injection or radiolabeled antibodies. These reagents may be useful in the diagnosis or therapy of human melanoma. Further evaluation will be required before they could be considered clinically useful." @default.
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- W1521509742 date "1986-09-01" @default.
- W1521509742 modified "2023-09-23" @default.
- W1521509742 title "Monoclonal Antibody Imaging of Human Melanoma" @default.
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- W1521509742 doi "https://doi.org/10.1097/00000658-198609000-00002" @default.
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