Failure to sense energy depletion may be a novel therapeutic target in chronic kidney disease

Kidney Int. 2019 Jan;95(1):123-137. doi: 10.1016/j.kint.2018.08.030. Epub 2018 Nov 16.


The kidneys consume a large amount of energy to regulate volume status and blood pressure and to excrete uremic toxins. The identification of factors that cause energy mismatch in the setting of chronic kidney disease (CKD) and the development of interventions aimed at improving this mismatch are key research imperatives. Although the critical cellular energy sensor 5'-adenosine monophosphate (AMP)-activated protein kinase (AMPK) is known to be inactivated in CKD, the mechanism of AMPK dysregulation is unknown. In a mouse model of CKD, metabolome analysis confirmed a decrease in AMPK activation in the kidneys despite a high AMP: ATP ratio, suggesting that AMPK did not sense energy depletion. Similar AMPK inactivation was found in heart and skeletal muscle in CKD mice. Several uremic factors were shown to inactivate AMPK in vitro and in ex vivo preparations of kidney tissue. The specific AMPK activator A-769662, which bypasses the AMP sensing mechanism, ameliorated fibrosis and improved energy status in the kidneys of CKD mice, whereas an AMP analog did not. We further demonstrated that a low-protein diet activated AMPK independent of the AMP sensing mechanism, leading to improvement in energy metabolism and kidney fibrosis. These results suggest that a failure to sense AMP is the key mechanism underlying the vicious cycle of energy depletion and CKD progression and direct AMPK activation may be a novel therapeutic approach in CKD.

Keywords: AMPK activators; chronic kidney disease; energy metabolism.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • AMP-Activated Protein Kinases / metabolism*
  • Adenosine Monophosphate / metabolism
  • Adenosine Triphosphate / metabolism
  • Animals
  • Biphenyl Compounds
  • Diet, Protein-Restricted*
  • Disease Models, Animal
  • Energy Metabolism / drug effects
  • Energy Metabolism / physiology*
  • Fibrosis / metabolism
  • Humans
  • Kidney / metabolism
  • Kidney / pathology*
  • Male
  • Metabolomics
  • Mice
  • Mice, Inbred C57BL
  • Muscle, Skeletal / metabolism
  • Muscle, Skeletal / pathology
  • Myocardium / metabolism
  • Myocardium / pathology
  • Pyrones / pharmacology
  • Renal Insufficiency, Chronic / diet therapy
  • Renal Insufficiency, Chronic / etiology
  • Renal Insufficiency, Chronic / metabolism
  • Renal Insufficiency, Chronic / pathology*
  • Signal Transduction / drug effects
  • Signal Transduction / physiology
  • Thiophenes / pharmacology


  • Biphenyl Compounds
  • Pyrones
  • Thiophenes
  • Adenosine Monophosphate
  • Adenosine Triphosphate
  • AMP-Activated Protein Kinases
  • 4-hydroxy-3-(4-(2-hydroxyphenyl)phenyl)-6-oxo-7H-thieno(2,3-b)pyridine-5-carbonitrile