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International Journal of Radiation Research، جلد ۵، شماره ۲، صفحات ۶۳-۶۹
عنوان فارسی
چکیده فارسی مقاله
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عنوان انگلیسی Reduced DNA damage in tumor spheroids compared to monolayer cultures exposed to ionizing radiation
چکیده انگلیسی مقاله Background: Several cell lines when cultured under proper condition can form three dimensional structures called multicellular tumor spheroids. Tumor spheroids are valuable in vitro models for studying physical and biological behavior of real tumors. A number of previous studies using a variety of techniques have shown no relationship between radiosensitivity and DNA strand breaks in monolayer and spheroid model of cell culture. Materials and Methods: In the present study, the radiosensitivity of cells grown as monolayer and spheroid were measured with colony assay and the role of DNA strand breaks in this sensitivity was examined using single cell gel electrophoresis assay also known as Comet assay. Results: In the present experiment, spheroids showed more radioresistance than monolayers as judged by the number of colonies which they produced after radiation. Under the same experimental conditions, less level of DNA damage was detected in spheroids using "comet assay" technique. Conclusion: It was concluded that the loss of radioresistance which was observed in monolayer cultures might have been attributed to the higher level of DNA damage occurred in the cells.
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نویسندگان مقاله غلامرضا فاضلی | gh r fazeli
institute of biochemistry and biophysics, university of tehran, tehran, iran

سازمان اصلی تایید شده: مرکز تحقیقات بیوشیمی و بیوفیزیک (Institute of biochemistry and biophysics)

s خویی | s. khoei
department of medical physics, iran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (Iran university of medical sciences)

علیرضا نیکوفر | a r nikoofar
department of medicine, iran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (Iran university of medical sciences)

b گلیایی | b. goliaei
institute of biochemistry and biophysics, university of tehran, tehran, iran

سازمان اصلی تایید شده: مرکز تحقیقات بیوشیمی و بیوفیزیک (Institute of biochemistry and biophysics)

نشانی اینترنتی http://www.ijrr.com/browse.php?a_code=A-10-1-235&slc_lang=en&sid=en
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کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده Radiation Biology
نوع مقاله منتشر شده تحقیق بدیع
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