Honokiol Protects against Anti- β 1-Adrenergic Receptor Autoantibody-Induced Myocardial Dysfunction via Activation of Autophagy

Oxid Med Cell Longev. 2018 Jul 18:2018:1640804. doi: 10.1155/2018/1640804. eCollection 2018.

Abstract

Myocardial diseases are prevalent syndromes with high mortality rate. The exploration of effective interference is important. Anti-β1-adrenergic receptor autoantibody (β1-AAB) is highly correlated with myocardial dysfunction. The actions and underlying mechanisms of honokiol (HNK) in β1-AAB-positive patients await to be unraveled. In this study, we established a rat model of β1-AAB positive with myocardial dysfunction. Cardiac function following β1-AR-ECII administration was analyzed using the VisualSonics Vevo 770 High-Resolution In Vivo Imaging System. The levels of autophagy-related proteins were detected by Western blotting. Our data revealed that HNK reversed β1-AAB-induced effects and protected myocardial tissues from dysfunction. After HNK treatment, the cardiac contractile ability increased and the LDH activity decreased. HNK attenuated myocardial degeneration. In addition, HNK promoted the activation of the AMP-dependent protein kinase/Unc-51-like autophagy activating kinase (AMPK/ULK) pathway and activated autophagy. These results suggest that HNK protects against β1-AAB-induced myocardial dysfunction via activation of autophagy and it may be a potentially therapeutic compound for β1-AAB-positive myocardial diseases.

MeSH terms

  • Animals
  • Anti-Infective Agents / pharmacology
  • Anti-Infective Agents / therapeutic use*
  • Autophagy
  • Biphenyl Compounds / pharmacology
  • Biphenyl Compounds / therapeutic use*
  • Cardiomyopathies / drug therapy*
  • Cardiomyopathies / pathology
  • Disease Models, Animal
  • Humans
  • Lignans / pharmacology
  • Lignans / therapeutic use*
  • Male
  • Rats
  • Rats, Wistar

Substances

  • Anti-Infective Agents
  • Biphenyl Compounds
  • Lignans
  • honokiol