Adiponectin enhances bone marrow mesenchymal stem cell resistance to flow shear stress through AMP-activated protein kinase signaling

Sci Rep. 2016 Jul 15:6:28752. doi: 10.1038/srep28752.

Abstract

Adiponectin has been demonstrated to protect the cardiovascular system and bone marrow mesenchymal stem cells (BMSCs). However, it is unclear whether adiponectin can protect BMSCs against flow shear stress (FSS). In this study, our aim was to explore the effects of adiponectin on BMSCs and to explore the role of AMP-activated protein kinase (AMPK) signaling in this process. Shear stress significantly inhibits the survival and increases the apoptosis of BMSCs in an intensity-dependent manner. The expression levels of TGF-β, bFGF, VEGF, PDGF, and Bcl2 are simultaneously reduced, and the phosphorylation levels of AMPK and ACC, as well as the expression level of Bax, are increased. Supplementation with adiponectin promotes the survival of BMSCs; reverses the changes in the expression levels of TGF-β, bFGF, VEGF, PDGF, Bcl2, and Bax; and further amplifies the phosphorylation of AMPK and ACC. Furthermore, the protective effects of adiponectin can be partially neutralized by AMPK siRNA. In summary, we have demonstrated for the first time that adiponectin can effectively protect BMSCs from FSS and that this effect depends, at least in part, on the activation of AMPK signaling.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • AMP-Activated Protein Kinases / genetics
  • AMP-Activated Protein Kinases / metabolism*
  • Adiponectin / pharmacology*
  • Animals
  • Apoptosis / drug effects
  • Bone Marrow Cells / cytology
  • Bone Marrow Cells / drug effects*
  • Bone Marrow Cells / metabolism
  • Cell Proliferation / drug effects
  • Cells, Cultured
  • Male
  • Mesenchymal Stem Cells / cytology
  • Mesenchymal Stem Cells / drug effects*
  • Mesenchymal Stem Cells / metabolism
  • Phosphorylation / drug effects
  • Proto-Oncogene Proteins c-bcl-2 / metabolism
  • RNA Interference
  • Rats, Sprague-Dawley
  • Signal Transduction / drug effects
  • Signal Transduction / genetics
  • Stress, Mechanical*
  • Transforming Growth Factor beta / metabolism

Substances

  • Adiponectin
  • Proto-Oncogene Proteins c-bcl-2
  • Transforming Growth Factor beta
  • AMP-Activated Protein Kinases