Production, quality control and biological evaluation of [153] Sm-TTHMP as a possible bone palliation agent

ABSTRACT

Various bone palliative therapeutic agents have been developed and widely used for bone metastasis such as [153]Sm-EDTMP. In this study, production, quality control and biodistribution studies of a newly developed therapeutic compound have been presented followed by imaging studies in wild-type rodents. [153]Sm-TTHMP was prepared starting from [153]Sm-SmCl[3], prepared by neutron activation of an enriched [152]Sm sample [purity >98%], and in-house synthesized TTHMP in 1h at 25[degree sign] C followed by stability tests, partition coefficient determination and biodistribution studies of in wild-type rodents using scarification and SPECT imaging. The radiolabled Sm complex was prepared in high radiochemical purity [>99%, ITLC] and specific activity of 278 GBq/mmol and demonstrated significant ability at 4, 25 and 37 [degree sign] C [in presence of human serum]. Initial biodistribution data showed significant bone accumulation of the tracer in 48h. [153]Sm-TTHMP can be a potential candidate for bone pain palliation therapy in skeletal metastases, although further biological studies in other mammals is still needed