Comparative Saturation Binding Analysis of ⁶⁴Cu-Labeled Somatostatin Analogues Using Cell Homogenates and Intact Cells.

ABSTRACT: The development of novel ligands for G-protein-coupled receptors (GPCRs) typically entails the characterization of their binding affinity, which is often performed with radioligands in a competition or saturation binding assay format. Since GPCRs are transmembrane proteins, receptor samples for binding assays are prepared from tissue sections, cell membranes, cell homogenates, or intact cells. As part of our investigations on modulating the pharmacokinetics of radiolabeled peptides for improved theranostic targeting of neuroendocrine tumors with a high abundance of the somatostatin receptor sub-type 2 (SST₂), we characterized a series of ⁶⁴Cu-labeled [Tyr³]octreotate (TATE) derivatives in vitro in saturation binding assays. Herein, we report on the SST

SUBMITTER: Ullrich M 

PROVIDER: S-EPMC10324063 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature