Journal
JOURNAL OF MEDICINAL CHEMISTRY
Volume 66, Issue 2, Pages 1454-1466Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jmedchem.2c01625
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This study aimed to design a photoswitchable ligand for precise control of ligand-receptor residence time and its pharmacological activity.
The pharmacological activity of a small-molecule ligand is linked to its receptor residence time. Therefore, precise control of the duration for which a ligand binds to its receptor is highly desirable. Herein, we designed photoswitchable ligands targeting the vasopressin V-2 receptor (V2R), a validated target for autosomal dominant polycystic kidney disease (ADPKD). We adapted the photoswitching trait of azobenzene to the parent V2R antagonist lixivaptan (LP) to generate azobenzene lixivaptan derivatives (aLPs). Among them, aLPs-5g was a potential optical-controlled kinetic switch. Upon irradiation, cis-aLPs-5g displayed a 4.3-fold prolonged V2R residence time compared to its thermally stable trans configuration. The optical-controlled kinetic variations led to distinct inhibitory effects on cellular functional readout. Furthermore, conversion of the cis/trans isomer of aLPs-5g resulted in different efficacies of inhibiting renal cystogenesis ex vivo and in vivo. Overall, aLPs-5g represents a photoswitch for precise control of ligand-receptor residence time and, consequently, the pharmacological activity.
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