Effects of radioimmunoimaging with ~(99)Tc~m-EGFR-McAb or ~(99)Tc~m-CD44-McAb or combined application of both on nude mice bearing human lung adenocarcinoma
- VernacularTitle:~(99)Tc~m-EGFR-McAb及~(99)Tc~m-CD44-McAb单独及联合用于荷人肺腺癌裸鼠的显像研究
- Author:
Dong DUAN
;
Shaolin LI
;
Yuquan ZHU
;
Shubin WANG
- Publication Type:Journal Article
- Keywords:
tumor;
EGFR, CD44;
antibody, monoclonal;
technetium;
radionuclideimaging
- From:Journal of Third Military Medical University
2003;0(13):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the effects of radioimmunoimaging with 99Tcm-EGFR-McAb or 99Tcm-CD44-McAb or combined application of both on nude mice bearing lung adenocarcinoma. Methods Animal model of nude mice bearing lung adenocarcinoma was established. The direct labeling method of 99Tcm was applied to labeling monoclonal antibodies for EGFR and CD44, and then the properties of the labeling antibodies purified by SephadexG50 Column were identified. The radio-immuno-image as well as body distribution concerning nude mice bearing lung adenocarcinoma was studied by application of 99Tcm-EGFR-McAb or 99Tcm-CD44-McAb alone or combined application of both. Results The labeling rates of 99Tcm for EGFR-McAb and CD44-McAb were (91.5?3.8)% and (92.3?4.1)% respectively. Specific activities of the labeled antibodies were (2.8?0.3)MBq/g and (2.9?0.5)MBq/g, respectively. The rates of radiochemical purity were (96.5?2.8)% and (96.2?3.1)%, respectively. The tumor tissue had high intake of the two labeled antibodies according to radioimmunoimaging result. The radioactivity concentration of the combined application of the two labeled antibodies was obviously higher than that of the single application. The T/NT relative values measured through ROI technique were 5.58?0.46, 2.72?0.22, and 2.30?0.18, respectively. The body distribution result of the labeled antibodies and their imaging results were basically identical. Conclusion The optimal target and non-target ratios could be obtained by application of 99Tcm-EGFR-McAb or 99Tcm-CD44-McAb alone in nude mice bearing lung adenocarcinoma. The target and non-target ratios could be enhanced through the combined application of the two antibodies.
