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Iranian Journal of Nuclear Medicine، جلد ۲۷، شماره ۲، صفحات ۱۳۰-۱۳۸
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عنوان انگلیسی Cellular dosimetry of beta emitting radionuclides-antibody conjugates for radioimmunotherapy
چکیده انگلیسی مقاله Introduction: The choice of optimal radionuclides for radioimmunotherapy depends on several factors, especially the radionuclide and antibody. The dosimetric characteristics of a non-internalizing and an internalizing monoclonal antibody (MAb) labeled with beta emitting radionuclides were investigated. Methods: Using Geant4-DNA Monte Carlo simulation, we carry out dosimetric calculations for different subcellular distributions of beta-emitting radionuclides; 131I, 177Lu, 64Cu, 186Re and 153Sm. Results:The dependency of theradialdose profiles on the energy spectra of   electrons (beta particles and Auger and internal conversion electrons) and also their relative yield of emission is clear. The highest difference between the radionuclides tested was observed when the activity was localized in the nucleus. There was not considerable difference in the nucleus dose when radionuclides were localized in cytoplasm and over the cell membrane. Conclusion: There is a very significant increase in the dose deposited to the nucleus if 153Sm localized at the nucleus. Although subcellular localization of activity isn't a critical factor for beta emitting radionuclides, but the use of internalizing MAbs leads to an increase in nucleus dose and to the killing of single cells in addition to the tumors.
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نویسندگان مقاله Parisa Taheri |
Department of Medical Physics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran

Hossein Rajabi |
Department of Medical Physics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran

Fariba Johari Daha |
Department of Radioisotope, Nuclear Science and Technology Research Institute, Tehran, Iran

Kamal Yavari |
Radiopharmaceutical Research and Development Laboratory, Nuclear Science and Technology Research Institute, Tehran, Iran

Mohammad Taghi Batiar |
Faculty of Nuclear Engineering, Shahid Beheshti University, Tehran, Iran

Hossein Mozdarani |
Department of Medical Genetics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran

نشانی اینترنتی http://irjnm.tums.ac.ir/article_35810_59463f285926813021d9319eb4e52270.pdf
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