Biased agonist pharmacochaperones of the AVP V2 receptor may treat congenital nephrogenic diabetes insipidus.
Fiche publication
Date publication
octobre 2009
Auteurs
Membres identifiés du Cancéropôle Est :
Pr HIBERT Marcel
Tous les auteurs :
Jean-Alphonse F, Perkovska S, Frantz MC, Durroux T, Mejean C, Morin D, Loison S, Bonnet D, Hibert M, Mouillac B, Mendre C
Lien Pubmed
Résumé
X-linked congenital nephrogenic diabetes insipidus (cNDI) results from inactivating mutations of the human arginine vasopressin (AVP) V2 receptor (hV(2)R). Most of these mutations lead to intracellular retention of the hV(2)R, preventing its interaction with AVP and thereby limiting water reabsorption and concentration of urine. Because the majority of cNDI-hV(2)Rs exhibit protein misfolding, molecular chaperones hold promise as therapeutic agents; therefore, we sought to identify pharmacochaperones for hV(2)R that also acted as agonists. Here, we describe high-affinity nonpeptide compounds that promoted maturation and membrane rescue of L44P, A294P, and R337X cNDI mutants and restored a functional AVP-dependent cAMP signal. Contrary to pharmacochaperone antagonists, these compounds directly activated a cAMP signal upon binding to several cNDI mutants. In addition, these molecules displayed original functionally selective properties (biased agonism) toward the hV(2)R, being unable to recruit arrestin, trigger receptor internalization, or stimulate mitogen-activated protein kinases. These characteristics make these hV(2)R agonist pharmacochaperones promising therapeutic candidates for cNDI.
Référence
J Am Soc Nephrol. 2009 Oct;20(10):2190-203