Purpose: Lymphokine-activated killer T cell-originated protein kinase (TOPK) is a fairly new cancer biomarker with great potential for clinical applications. The labeling of a TOPK inhibitor with F-18 can be exploited for positron emission tomography (PET) imaging allowing more accurate patient identification, stratification, and disease monitoring.
Procedures: [F]FE-OTS964 was produced starting from OTS964, a preclinical drug which specifically binds to TOPK, and using a two-step procedure with [F]fluoroethyl p-toluenesulfonate as a prosthetic group.