Imaging and biodistribution of 111In-labeled anti-carcinoembryonic antigen monoclonal antibodies in nude mice bearing human colon cancer xenografts

Wu, H.

Zhonghua Zhong Liu Za Zhi 11(4): 254-256

1989


ISSN/ISBN: 0253-3766
PMID: 2625105
Document Number: 345906
Anti-CEA monoclonal antibody was labeled with 111In using DTPA cyclic anhydride. The radiochemical purity of the product was more than 99% and specific binding was 38%. Imaging and biodistribution of this radiopharmaceutical in nude mice bearing human colon cancer xenografts were investigated. The results showed that a clear image of tumor was obtained by gamma camera between 24 to 120 hrs, best in 72 hrs, after injection. A high uptake of 111In-labeled monoclonal antibodies in tumor tissue was also observed, although the radioactivity in liver was considerable.

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