Adiponectin-mediated antilipotoxic effects in regenerating pancreatic islets

Endocrinology. 2015 Jun;156(6):2019-28. doi: 10.1210/en.2015-1066. Epub 2015 Mar 27.


Pathways that stimulate β-cell regeneration remain of great clinical interest, yet effective therapeutic avenues that promote survival or reconstitution of β-cell mass remain elusive. Using a mouse model with inducible β-cell apoptosis followed by adiponectin-mediated regeneration, we aimed to identify key molecules boosting β-cell viability. In the regenerating pancreatic islets, we examined changes within the transcriptome and observed an extensive up-regulation of genes encoding proteins involved in lipid transport and metabolism. The most prominent targets were further confirmed by quantitative PCR and immunofluorescence. Among the upstream regulators predicted by pathway analysis of the transcriptome, we detected enhanced levels of 2 key transcription factors, Hepatocyte Nuclear Factor 4α and Peroxisome Proliferator-Activated Receptorα. Our data suggest that improving pancreatic islet lipid metabolism as an important antilipotoxic phenomenon to boost β-cell regeneration. This is primarily mediated by the adipokine adiponectin that exerts its action on both the beta-cell directly as well as on the adipocyte. Adiponectin induces lipid metabolism gene expression in regenerating islets through Hepatocyte Nuclear Factor 4α and Peroxisome Proliferator-Activated Receptorα. Adiponectin also modulates leptin levels via preserving adipose tissue mass in the insulinopenic state.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adiponectin / genetics
  • Adiponectin / metabolism*
  • Animals
  • Apoptosis / physiology
  • Cell Proliferation / physiology
  • Immunohistochemistry
  • Insulin-Secreting Cells / metabolism
  • Islets of Langerhans / metabolism*
  • Lipid Metabolism / physiology
  • Male
  • Mice
  • Mice, Knockout
  • Real-Time Polymerase Chain Reaction
  • Transcriptome / genetics


  • Adiponectin