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- W1981844372 abstract "Patients having the nephrogenic syndrome of inappropriate antidiuresis present either the R137C or R137L V2 mutated receptor. While the clinical features have been characterized, the molecular mechanisms of functioning of these two mutants remain elusive. In the present study, we compare the pharmacological properties of R137C and R137L mutants with the wild-type and the V2 D136A receptor, the latter being reported as a highly constitutively active receptor. We have performed binding studies, second messenger measurements and BRET experiments in order to evaluate the affinities of the ligands, their agonist and antagonist properties and the ability of the receptors to recruit beta-arrestins, respectively. The R137C and R137L receptors exhibit small constitutive activities regarding the G(s) protein activation. In addition, these two mutants induce a constitutive beta-arrestin recruitment. Of interest, they also exhibit weak sensitivities to agonist and to inverse agonist in term of G(s) protein coupling and beta-arrestin recruitment. The small constitutive activities of the mutants and the weak regulation of their functioning by agonist suggest a poor ability of the antidiuretic function to be adapted to the external stimuli, giving to the environmental factors an importance which can explain some of the phenotypic variability in patients having NSIAD." @default.
- W1981844372 created "2016-06-24" @default.
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- W1981844372 date "2009-12-21" @default.
- W1981844372 modified "2023-09-30" @default.
- W1981844372 title "The Constitutively Active V2 Receptor Mutants Conferring NSIAD Are Weakly Sensitive to Agonist and Antagonist Regulation" @default.
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- W1981844372 doi "https://doi.org/10.1371/journal.pone.0008383" @default.
- W1981844372 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2792721" @default.
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