Benzodiazepine Derivatives as Potent Vasopressin V 2 Receptor Antagonists for the Treatment of Autosomal Dominant Kidney Disease.

Cyst formation and enlargement in autosomal dominant kidney disease (ADPKD) is mainly driven by aberrantly increased cytosolic cAMP in renal tubule epithelial cells. Because the vasopressin V 2 receptor (V 2 R) regulates intracellular cAMP levels in kidneys, a series of benzodiazepine derivatives were developed targeting the V 2 R. Among these derivatives, compound 25 exhibited potent binding affinity to the V 2 R ( K i = 9.0 ± 1.5 nM) and efficacious cAMP inhibition (IC 50 = 9.2 ± 3.0 nM). This led to the suppression of cyst formation and growth in both an MDCK cell model and an embryonic kidney cyst model. Further advancing compound 25 in a murine model of ADPKD demonstrated a significantly improved in vivo efficacy compared with the reference compound tolvaptan. Overall, compound 25 holds therapeutic potential for the treatment of ADPKD.