Cell Reports (May 2023)

Architecture of androgen receptor pathways amplifying glucagon-like peptide-1 insulinotropic action in male pancreatic β cells

  • Weiwei Xu,
  • M.M. Fahd Qadir,
  • Daniela Nasteska,
  • Paula Mota de Sa,
  • Caroline M. Gorvin,
  • Manuel Blandino-Rosano,
  • Charles R. Evans,
  • Thuong Ho,
  • Evgeniy Potapenko,
  • Rajakrishnan Veluthakal,
  • Fiona B. Ashford,
  • Stavroula Bitsi,
  • Jia Fan,
  • Manika Bhondeley,
  • Kejing Song,
  • Venkata N. Sure,
  • Siva S.V.P. Sakamuri,
  • Lina Schiffer,
  • Wandy Beatty,
  • Rachael Wyatt,
  • Daniel E. Frigo,
  • Xiaowen Liu,
  • Prasad V. Katakam,
  • Wiebke Arlt,
  • Jochen Buck,
  • Lonny R. Levin,
  • Tony Hu,
  • Jay Kolls,
  • Charles F. Burant,
  • Alejandra Tomas,
  • Matthew J. Merrins,
  • Debbie C. Thurmond,
  • Ernesto Bernal-Mizrachi,
  • David J. Hodson,
  • Franck Mauvais-Jarvis

Journal volume & issue
Vol. 42, no. 5
p. 112529

Abstract

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Summary: Male mice lacking the androgen receptor (AR) in pancreatic β cells exhibit blunted glucose-stimulated insulin secretion (GSIS), leading to hyperglycemia. Testosterone activates an extranuclear AR in β cells to amplify glucagon-like peptide-1 (GLP-1) insulinotropic action. Here, we examined the architecture of AR targets that regulate GLP-1 insulinotropic action in male β cells. Testosterone cooperates with GLP-1 to enhance cAMP production at the plasma membrane and endosomes via: (1) increased mitochondrial production of CO2, activating the HCO3−-sensitive soluble adenylate cyclase; and (2) increased Gαs recruitment to GLP-1 receptor and AR complexes, activating transmembrane adenylate cyclase. Additionally, testosterone enhances GSIS in human islets via a focal adhesion kinase/SRC/phosphatidylinositol 3-kinase/mammalian target of rapamycin complex 2 actin remodeling cascade. We describe the testosterone-stimulated AR interactome, transcriptome, proteome, and metabolome that contribute to these effects. This study identifies AR genomic and non-genomic actions that enhance GLP-1-stimulated insulin exocytosis in male β cells.

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