Characterization of genetic variants of GIPR reveals a contribution of β-arrestin to metabolic phenotypes
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Characterization of genetic variants of GIPR reveals a contribution of β-arrestin to metabolic phenotypes. / Kizilkaya, Hüsün S.; Sørensen, Kimmie V.; Madsen, Jakob S.; Lindquist, Peter; Douros, Jonathan D.; Bork-Jensen, Jette; Berghella, Alessandro; Gerlach, Peter A.; Gasbjerg, Lærke S.; Mokrosiński, Jacek; Mowery, Stephanie A.; Knerr, Patrick J.; Finan, Brian; Campbell, Jonathan E.; D’Alessio, David A.; Perez-Tilve, Diego; Faas, Felix; Mathiasen, Signe; Rungby, Jørgen; Sørensen, Henrik T.; Vaag, Allan; Nielsen, Jens S.; Holm, Jens Christian; Lauenborg, Jeannet; Damm, Peter; Pedersen, Oluf; Linneberg, Allan; Hartmann, Bolette; Holst, Jens J.; Hansen, Torben; Wright, Shane C.; Lauschke, Volker M.; Grarup, Niels; Hauser, Alexander S.; Rosenkilde, Mette M.
In: Nature Metabolism, Vol. 6, 2024, p. 1268–1281.Research output: Contribution to journal › Letter › Research › peer-review
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TY - JOUR
T1 - Characterization of genetic variants of GIPR reveals a contribution of β-arrestin to metabolic phenotypes
AU - Kizilkaya, Hüsün S.
AU - Sørensen, Kimmie V.
AU - Madsen, Jakob S.
AU - Lindquist, Peter
AU - Douros, Jonathan D.
AU - Bork-Jensen, Jette
AU - Berghella, Alessandro
AU - Gerlach, Peter A.
AU - Gasbjerg, Lærke S.
AU - Mokrosiński, Jacek
AU - Mowery, Stephanie A.
AU - Knerr, Patrick J.
AU - Finan, Brian
AU - Campbell, Jonathan E.
AU - D’Alessio, David A.
AU - Perez-Tilve, Diego
AU - Faas, Felix
AU - Mathiasen, Signe
AU - Rungby, Jørgen
AU - Sørensen, Henrik T.
AU - Vaag, Allan
AU - Nielsen, Jens S.
AU - Holm, Jens Christian
AU - Lauenborg, Jeannet
AU - Damm, Peter
AU - Pedersen, Oluf
AU - Linneberg, Allan
AU - Hartmann, Bolette
AU - Holst, Jens J.
AU - Hansen, Torben
AU - Wright, Shane C.
AU - Lauschke, Volker M.
AU - Grarup, Niels
AU - Hauser, Alexander S.
AU - Rosenkilde, Mette M.
N1 - Publisher Copyright: © The Author(s) 2024.
PY - 2024
Y1 - 2024
N2 - Incretin-based therapies are highly successful in combatting obesity and type 2 diabetes1. Yet both activation and inhibition of the glucose-dependent insulinotropic polypeptide (GIP) receptor (GIPR) in combination with glucagon-like peptide-1 (GLP-1) receptor (GLP-1R) activation have resulted in similar clinical outcomes, as demonstrated by the GIPR–GLP-1R co-agonist tirzepatide2 and AMG-133 (ref. 3) combining GIPR antagonism with GLP-1R agonism. This underlines the importance of a better understanding of the GIP system. Here we show the necessity of β-arrestin recruitment for GIPR function, by combining in vitro pharmacological characterization of 47 GIPR variants with burden testing of clinical phenotypes and in vivo studies. Burden testing of variants with distinct ligand-binding capacity, Gs activation (cyclic adenosine monophosphate production) and β-arrestin 2 recruitment and internalization shows that unlike variants solely impaired in Gs signalling, variants impaired in both Gs and β-arrestin 2 recruitment contribute to lower adiposity-related traits. Endosomal Gs-mediated signalling of the variants shows a β-arrestin dependency and genetic ablation of β-arrestin 2 impairs cyclic adenosine monophosphate production and decreases GIP efficacy on glucose control in male mice. This study highlights a crucial impact of β-arrestins in regulating GIPR signalling and overall preservation of biological activity that may facilitate new developments in therapeutic targeting of the GIPR system.
AB - Incretin-based therapies are highly successful in combatting obesity and type 2 diabetes1. Yet both activation and inhibition of the glucose-dependent insulinotropic polypeptide (GIP) receptor (GIPR) in combination with glucagon-like peptide-1 (GLP-1) receptor (GLP-1R) activation have resulted in similar clinical outcomes, as demonstrated by the GIPR–GLP-1R co-agonist tirzepatide2 and AMG-133 (ref. 3) combining GIPR antagonism with GLP-1R agonism. This underlines the importance of a better understanding of the GIP system. Here we show the necessity of β-arrestin recruitment for GIPR function, by combining in vitro pharmacological characterization of 47 GIPR variants with burden testing of clinical phenotypes and in vivo studies. Burden testing of variants with distinct ligand-binding capacity, Gs activation (cyclic adenosine monophosphate production) and β-arrestin 2 recruitment and internalization shows that unlike variants solely impaired in Gs signalling, variants impaired in both Gs and β-arrestin 2 recruitment contribute to lower adiposity-related traits. Endosomal Gs-mediated signalling of the variants shows a β-arrestin dependency and genetic ablation of β-arrestin 2 impairs cyclic adenosine monophosphate production and decreases GIP efficacy on glucose control in male mice. This study highlights a crucial impact of β-arrestins in regulating GIPR signalling and overall preservation of biological activity that may facilitate new developments in therapeutic targeting of the GIPR system.
U2 - 10.1038/s42255-024-01061-4
DO - 10.1038/s42255-024-01061-4
M3 - Letter
C2 - 38871982
AN - SCOPUS:85196101926
VL - 6
SP - 1268
EP - 1281
JO - Nature Metabolism
JF - Nature Metabolism
SN - 2522-5812
ER -
ID: 395996330