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.