Does AMP-activated Protein Kinase Couple Inhibition of Mitochondrial Oxidative Phosphorylation by Hypoxia to Pulmonary Artery Constriction?

  • A.M. EVANS


Pulmonary arteries constricts in response to hypoxia and thereby aid ventilation-perfusion matching in the lung. Although O2-sensitive mechanisms independent of mitochondria may also play a role, it is generally accepted that relatively mild hypoxia inhibits mitochondrial oxidative phosphorylation and that this underpins, at least in part, cell activation2-6. Despite this consensus, the mechanism by which inhibition of mitochondrial oxidative phosphorylation couples to Ca2+-dependent vasoconstriction has remained elusive. To date, the field has focussed on the role of the cellular energy status (ATP), reduced redox couples and reactive oxygen species4,5 respectively, but investigation of these hypotheses has delivered conflicting data and failed to unite the field8.


Pulmonary Artery AMPK Activation Hypoxic Pulmonary Vasoconstriction Mitochondrial Oxidative Phosphorylation Pulmonary Arterial Smooth Muscle Cell 
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Copyright information

© Springer 2006

Authors and Affiliations

  • A.M. EVANS
    • 1
    • 2
    • 1
    • 1
    • 1
    • 2
  1. 1.Department of Biomedical Sciences, School of Biology, Bute BuildingUniversity of St AndrewsSt. AndrewsUK.
  2. 2.Division of Molecular Physiology, School of Life Sciences, Wellcome Trust BiocentreUniversity of DundeeUK.

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