Skip to Main content Skip to Navigation
Journal articles

Deciphering biased-agonism complexity reveals a new active AT1 receptor entity.

Abstract : Functional selectivity of G protein-coupled receptor (GPCR) ligands toward different downstream signals has recently emerged as a general hallmark of this receptor class. However, pleiotropic and crosstalk signaling of GPCRs makes functional selectivity difficult to decode. To look from the initial active receptor point of view, we developed new, highly sensitive and direct bioluminescence resonance energy transfer-based G protein activation probes specific for all G protein isoforms, and we used them to evaluate the G protein-coupling activity of [(1)Sar(4)Ile(8)Ile]-angiotensin II (SII), previously described as an angiotensin II type 1 (AT(1)) receptor-biased agonist that is G protein independent but β-arrestin selective. By multiplexing assays sensing sequential signaling events, from receptor conformations to downstream signaling, we decoded SII as an agonist stabilizing a G protein-dependent AT(1A) receptor signaling module different from that of the physiological agonist angiotensin II, both in recombinant and primary cells. Thus, a biased agonist does not necessarily select effects from the physiological agonist but may instead stabilize and create a new distinct active pharmacological receptor entity.
Document type :
Journal articles
Complete list of metadata
Contributor : Marie Francoise Simon Connect in order to contact the contributor
Submitted on : Wednesday, November 21, 2012 - 9:28:09 AM
Last modification on : Friday, August 5, 2022 - 12:31:14 PM




Aude Saulière, Morgane Bellot, Hervé Paris, Colette Denis, Frédéric Finana, et al.. Deciphering biased-agonism complexity reveals a new active AT1 receptor entity.. Nature Chemical Biology, Nature Publishing Group, 2012, 8 (7), pp.622-30. ⟨10.1038/nchembio.961⟩. ⟨inserm-00755334⟩



Record views