Radiolabeling and evaluation of two 177Lu-labeled bis-phosphonates
Publish place: Iranian Journal of Nuclear Medicine، Vol: 23، Issue: 2
Publish Year: 1394
نوع سند: مقاله ژورنالی
زبان: English
View: 417
This Paper With 8 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_IRJNM-23-2_008
تاریخ نمایه سازی: 21 بهمن 1398
Abstract:
Introduction: Bone pain palliation therapy is a mandate in handling end-stage cancer patients. The development of new ligands with higher stability, better pharmacokinetics and lower unwanted tissue uptakes (liver and GI) is still ongoing. Methods: In this work Lu-177 labeled (3-amino-1-hydroxypropane-1,1-di-yl)-bis-(phosphonate) (177Lu-pamidronate; 177Lu-PAM ), and (3-amino-1-hydroxybutane-1,1-di-yl)-bis-(phosphonate) (177Lu-alendronate; 177Lu-ALN) complexes were prepared successfully using related ligands and 177LuCl3 at 25ºC & 60ºC at various ligand:metal ratios for 60-360 min. Lu-177 chloride was obtained by thermal neutron irradiation (4 × 1013 n.cm-2s-1) of natural Lu2O3 samples. Radiochemical purities of 177Lu- complexes were checked by ITLC and HPLC. Stability studies of final preparation in the presence of human serum were evaluated along with protein binding studies as well as hydroxyapatite (HA) binding test. The biodistribution of 177Lu-complexes and 177LuCl3 in mice were determined for 7 d. Results: The complexes were obtained in high radiochemical purity ITLC (> 97%) and HPLC (> 99.9%). Satisfactory stability in presence of human serum and final formulations were obtained ( 90% in 48 h).HA binding assay demonstrated > 98% binding from 5-20 mg. The complex protein binding was about 50-58%. Conclusion: Biodistribution of both complexes demonstrated low bone uptake ratios at all time intervals, for far inferior to 177Lu-EDTMP.
Keywords:
Authors
Ashraf Fakhari
Department of Radiopharmacy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
Amir Reza Jalilian
Radiopharmacy Research Group, Radiation Application Research School, Nuclear Science and Technology Research Institute, Tehran, Iran
Hassan Yousefnia
Radiopharmacy Research Group, Radiation Application Research School, Nuclear Science and Technology Research Institute, Tehran, Iran
Ali Bahrami-Samani
Radiopharmacy Research Group, Radiation Application Research School, Nuclear Science and Technology Research Institute, Tehran, Iran
مراجع و منابع این Paper:
لیست زیر مراجع و منابع استفاده شده در این Paper را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود Paper لینک شده اند :