Variations in Radioimmunoscintigraphic Detection of Tumor Showed by Five Monoclonal Antibodies to Carcinoembryonic Antigen
Overview
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Radioimmunoscintigraphy using mouse monoclonal antibodies to various parts of a carcinoembryonic antigen (CEA) molecule was performed. Four radiolabeled antibodies (F4-82, 28A, F3-30, F33-104) were injected into tumor transplanted nude mice to compare the accumulation of these antibodies in tumors. The four antibodies were accumulated selectively in CEA- producing tumors. The tumor visualization correlated with the tumor/blood radioactivity ratio, whereas the tumor/blood radioactivity ratio did not correlate with the in vitro percent binding to tumor cells or the in vivo percent injected dose in CEA-producing tumors. Among the four antibodies, F33-104 showed the highest tumor/blood radioactivity ratio and the best image quality in any CEA-producing tumor. These results suggest that the antibody which has a high tumor/blood ratio rather than high total tumor uptake may be useful for radioimmunoscintigraphy.
Watanabe N, Oriuchi N, Sugiyama S, Kuroki M, Matsuoka Y Ann Nucl Med. 1994; 8(1):23-30.
PMID: 8204394 DOI: 10.1007/BF03164983.