Adiponectin signals through Adiponectin Receptor 1 to reverse imatinib resistance in K562 human chronic myeloid leukemia cells

Biochem Biophys Res Commun. 2015 Jan 2;456(1):367-72. doi: 10.1016/j.bbrc.2014.11.089. Epub 2014 Dec 2.

Abstract

Adiponectin, a member of adipokines, is a functional ligand for Adiponectin Receptor-1 (AdipoR1) and Adiponectin Receptor-2 (AdipoR2), and has been found to be linked to the risk of CML. Imatinib has undoubtedly revolutionised the management and outcome of chronic myeloid leukemia (CML), however imatinib resistance has been recognized as a major problem in CML therapy. In this study, we first established imatinib-resistant K562 CML cells, and then evaluated the effect of Adiponectin in reversing imatinib resistance. The data presented here demonstrated that Adiponectin was able to reverse K562 resistance to imatinib in vitro and in vivo. Additional data with molecular approaches suggested that the reversion of Adiponectin in imatinib resistance signals through AdipoR1 but not AdipoR2 to downregulate Bcr-Abl expression and effect in imatinib-resistant K562 CML cells. Taken together, our data showed that Adiponectin can reverse imatinib resistance in CML, and to a certain extent elucidate the mechanism of Adiponectin reversing imatinib resistance that may provide a new and promising approach in imatinib resistance management in CML therapy.

Keywords: Adiponectin; Adiponectin Receptor; Bcr-Abl; Chronic myeloid leukemia; Imatinib; Resistance.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adiponectin / metabolism*
  • Animals
  • Antineoplastic Agents / therapeutic use*
  • Benzamides / therapeutic use*
  • Cell Cycle
  • Cell Proliferation
  • Dose-Response Relationship, Drug
  • Drug Resistance, Neoplasm*
  • Fusion Proteins, bcr-abl / metabolism
  • Gene Expression Regulation, Neoplastic
  • Humans
  • Imatinib Mesylate
  • K562 Cells
  • Leukemia, Myelogenous, Chronic, BCR-ABL Positive / drug therapy
  • Leukemia, Myelogenous, Chronic, BCR-ABL Positive / metabolism*
  • Mice
  • Mice, Inbred BALB C
  • Mice, Nude
  • Piperazines / therapeutic use*
  • Protein Kinase Inhibitors / therapeutic use
  • Pyrimidines / therapeutic use*
  • RNA, Small Interfering / metabolism
  • Receptors, Adiponectin / metabolism*
  • Time Factors

Substances

  • ADIPOR1 protein, human
  • Adiponectin
  • Antineoplastic Agents
  • Benzamides
  • Piperazines
  • Protein Kinase Inhibitors
  • Pyrimidines
  • RNA, Small Interfering
  • Receptors, Adiponectin
  • Imatinib Mesylate
  • Fusion Proteins, bcr-abl