Click-Mediated Pretargeted Radioimmunotherapy of Colorectal Carcinoma.

ABSTRACT: Pretargeted radioimmunotherapy (PRIT) based on the inverse electron demand Diels-Alder (IEDDA) reaction between tetrazine (Tz) and trans-cyclooctene (TCO) represents a promising strategy for leveraging the affinity and specificity of antibodies without their pharmacokinetic drawbacks. Herein, we present an investigation of the in vivo efficacy and dosimetry of a PRIT strategy for colorectal carcinoma based on the ligation between a 177Lu-labeled Tz radioligand (177Lu-DOTA-PEG7-Tz) and a TCO-bearing immunoconjugate of the huA33 antibody (huA33-TCO). Biodistribution studies in tumor-bearing mice using intervals of 24, 48, and 72 h between the administration of huA33-TCO and 177Lu-DOTA-PEG7-Tz revealed that a 24 h lag time produced the most promising in vivo results: high activity concentrati

SUBMITTER: Membreno R 

PROVIDER: S-EPMC6467224 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature