alexa Cure of human carcinoma xenografts by a single dose of pretargeted yttrium-90 with negligible toxicity.
Chemistry

Chemistry

Medicinal Chemistry

Author(s): Axworthy DB, Reno JM, Hylarides MD, Mallett RW, Theodore LJ,

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Abstract A covalent conjugate (NR-LU-10/SA) was prepared between streptavidin (SA) and NR-LU-10, a mAb that binds an antigen expressed on the surface of most human carcinomas. NR-LU-10/SA was injected into nude mice bearing human tumor xenografts. Injection of biotinylated galactosyl-human serum albumin reduced the circulating levels of conjugate by 95\%. Subsequent administration of (90)Y-1,4,7, 10-tetraazacyclododecane-1,4,7,10-tetraacetic acid-biotin achieved peak uptake at the tumor within 2 hr while >80\% of the radioactivity was eliminated in the urine. A single dose of 600-800 microCi of (90)Y-1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid-biotin produced cures in 10/10 mice with established (>200 mm(3)) s.c. human small cell lung or colon cancer xenografts and 8/10 cures in mice with human breast cancer xenografts without significant toxicity.
This article was published in Proc Natl Acad Sci U S A and referenced in Medicinal Chemistry

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