Design, radiosynthesis, and evaluation of radiotracers for positron emission tomography imaging of stearoyl-CoA desaturase-1
摘要:
Design, radiosynthesis, and biological evaluation of two radiotracers (N-(3-[F-18] fluoropropyl)-6-(4( trifluoromethyl) benzoyl)-piperazin-1-yl) pyridazine-3-carboxamide (F-18-FPPPT) and (N-(4-[ 18F] fluoroaniline)-6-(4-(trifluoromethyl) benzoyl)-piperazin-1-yl) pyridazine-3-carboxamide (F-18-FAPPT)) are described for noninvasive assessment of stearoyl-CoA desaturase-1 (SCD-1). The overexpression of SCD-1 in multiple solid tumors associates with poor survival in cancer patients. The two radiotracers, F-18-FPPPT and F-18-FAPPT, were each prepared in three steps in radiochemical yields of 21% and 3%, respectively. The practicality of imaging SCD-1 with F-18-FPPPT was tested in two mouse models bearing xenograft tumors with different levels of SCD-1 expression, which afforded a 1.8-fold uptake difference correspondingly. Our work indicates that it is possible to develop SCD-1 specific imaging probes from previously reported SCD-1 inhibitors. (C) 2015 Elsevier Ltd. All rights reserved.