نوع مقاله : مقاله فنی
نویسندگان
پژوهشکده چرخه سوخت هستهای، پژوهشگاه علوم و فنون هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران- ایران
چکیده
رادیوداروهای بر پایه آنتی بادی امروزه در تصویربرداری و رادیوتراپی سرطان به شدت مورد توجه میباشند. آنتی بادی منوکلونال سیتوکسیمب به گیرنده فاکتور رشد اپیدرمال (EGFR) متصل میشود و بنابراین امکان ایجاد پروتکلهای درمانی و تشخیصی علیه این گیرنده را فراهم مینماید. در این تحقیق آنتی بادی سیتوکسیمب پس از تخلیص وکونژوگاسیون با DOTA-NHS تازه تهیه شده، با لوتسیم 177 و ساماریم کلراید-153 نشاندار گردید. بازده نشاندارسازی و پایداری برون تنی با استفاده از کروماتوگرافی لایه نازک اندازهگیری شد. تستهای سلولی به منظور تعیین رادیوایمنواکتیویته و مهار رشد سلول سرطانی انجام شدند. نتایج حاصل نشان داد که بازده نشاندارسازی سیتوکسیمب -DOTA-Lu177 و سیتوکسیمبSm-DOTA- 153 به ترتیب بیشتر از 1±97% و 2±96% بود. همچنین پایداری برونتنی فراوردههای نشاندار شده در سرم تازه انسانی پس از 96 ساعت به ترتیب 2±83% و 78% بود. ایمنوراکتیویتی برای سیتوکسیمب -DOTA-Lu177، برابر 1±91% و برای سیتوکسیمبSm-DOTA- 153، 1±66% بهدست آمد. هر دو فراورده بسته به زمان و انرژی بتا با شدتهای مختف اثر مهاری روی رشد سلولهای سرطانی 29HT کولون داشتند. نتایج تحقیق نشان داد که کمپلکسهای ایمنوکونژوگه سیتوکسیمب -DOTA-Lu177 و سیتوکسیمبSm-DOTA- 153 میتوانند به عنوان رادیوداروی جدید جهت رادیوایمنوتراپی سرطانها در نظر گرفته شوند.
کلیدواژهها
عنوان مقاله [English]
Production and evaluation of cellular effects of 153Sm-DOTA-cetuximab and 177Lu-DOTA-cetuximab radioconjugates
نویسندگان [English]
- K. Yavari
- M. Ghanadi Maragheh
Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, AEOI, P.O.Box: 11365-3486, Tehran - Iran
چکیده [English]
Antibody-based radiopharmaceuticals are of increasing interest today in cancer imaging and radiotherapy. The cetuximab monoclonal antibody binds to the epidermal growth factor receptor (EGFR) and thus provides therapeutic and diagnostic protocols against this receptor. Following purification and conjugation with freshly prepared DOTA-NHS, the cetuximab antibody was labeled with lutetium 177 and samarium chloride-153. Labeling efficiency and in vitro stability were measured using thin-layer chromatography. Cellular tests were performed to determine radioimmunoactivity in cancer cells. The results showed that the labeling efficiencies of 177Lu-DOTA-cetuximab and 153Sm-DOTA-cetuximab were more than 97±1% and 96±2%, respectively. Also, the in vitro stability of the labeled products in fresh human serum after 96 hours was 83± 22% and 78%, respectively. Immunoreactivity was 91% for 177Lu-DOTA-cetuximab and 66±1% for 153Sm-DOTA-cetuximab. With different intensities based on time and beta energy, both products inhibited the growth of HT29 colon cancer cells. The results showed that the immunoconjugate complexes of 177Lu-DOTA-cetuximab and 153Sm-DOTA-cetuximab can be considered a novel radiopharmaceutical for cancer radioimmunotherapy.
کلیدواژهها [English]
- Cetuximab
- Lutetium 177
- Samarium153
- Radiochemical purity
- Cell growth inhibition
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