Chang WY, Kuo WT, Wu CY, Lin CY, Chan PC, Shen CC, Liu RS, Wang HE, Chen CL. Evaluation of (131/123)I-5-iodo-2'-deoxycytidine as a novel proliferation probe in a tumor mouse model.
Appl Radiat Isot 2013;
77:166-73. [PMID:
23602704 DOI:
10.1016/j.apradiso.2013.03.021]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Revised: 02/01/2013] [Accepted: 03/10/2013] [Indexed: 10/27/2022]
Abstract
This study evaluated a radioiodinated deoxycytidine analog, (131)I-5-iodo-2'-deoxycytidine ([(131)I]ICdR), as a novel proliferation probe and compared it with (131)I-5-iodo-2'-deoxyuridine ([(131)I]IUdR) in a NG4TL4 sarcoma-bearing mouse model. As an imaging agent, the biological characteristics of [(123)I]IUdR is not satisfactory due to its metabolic instability and short biological half-life in vivo. With [(123)I]ICdR/SPECT it was possible to clearly delineate the tumor lesion at 1h post-injection (tumor-to-muscle ratio 7.74) in tumor-bearing mice. The results of biodistribution were consistent with those observed in scintigraphic imaging. This study demonstrated that [(131)I]ICdR is a more promising SPECT probe than [(131)I]IUdR for imaging proliferation.
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