Sardari D, Hakimi A. Modeling the time dependent distribution of a new (153)Sm complex for targeted radiotherapy purpose.
Rep Pract Oncol Radiother 2012;
17:358-62. [PMID:
24377038 PMCID:
PMC3863299 DOI:
10.1016/j.rpor.2012.07.001]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2011] [Revised: 05/28/2012] [Accepted: 07/10/2012] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND
For radioimmunotherapy purposes, a chemical complex with high absorption in cancer tumor is required. New chemicals are to be examined for their concentration in tumor and healthy organs. These are labeled with β-emitting radioisotopes to irradiate the tumor while deposited inside it.
AIM
To study the capability of recently developed chemical complex in targeting cancer tumor and investigate the distribution of (153)Sm-TPTTC in rat organs as function of time.
MATERIALS AND METHODS
The chemical complex - [Tris(1,10-phenanthroline)Samarium(III)] trithiocyanate was prepared and labeled with (153)Sm radioisotope. The labeled complex was injected to a population of tumor bearing mice. In 2, 4, 24, 48, 96 h after injection the animals were sacrificed and the concentration of Samarium complex was measured in various organs such as blood, heart, intestine, colon, liver, spleen, kidney, sternum and bone.
RESULTS
The concentration of the radiopharmaceutical in various organs was measured at different times. The temporal behavior of biodistribution of (153)Sm-TPTTC was modeled and drawn as function of time.
CONCLUSION
It is shown that (153)Sm-TPTTC is concentrated in tumor tissue and liver much more than in other organs. The variation of pharmaceutical concentration in all organs is described with summation of eight exponential terms and it approximates our experimental data with precision better than 2%.
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