title: Attenuating myocardial ischemia by targeting A2B adenosine receptors.
abstract: Myocardial ischemia is associated with profound tissue hypoxia due to an imbalance in oxygen supply and demand, and studies of hypoxia-elicited adaptive responses during myocardial ischemia revealed a cardioprotective role for the signaling molecule adenosine. In ischemic human hearts, the A2B adenosine receptor (ADORA2B) is selectively induced. Functional studies in genetic models show that ADORA2B signaling attenuates myocardial infarction by adapting metabolism towards more oxygen efficient utilization of carbohydrates. This adenosine-mediated cardio-adaptive response involves the transcription factor hypoxia-inducible factor HIF1α and the circadian rhythm protein PER2. In this article, we discuss advances in the understanding of adenosine-elicited cardioprotection with particular emphasis on ADORA2B, its downstream targets, and the implications for novel strategies to prevent or treat myocardial ischemia.
authors.affiliation: Mucosal Inflammation Program, Department of Anesthesiology, University of Colorado School of Medicine, Aurora, CO, USA. holger.eltzschig@ucdenver.edu
authors.forename: Holger K
authors.initials: HK
authors.lastname: Eltzschig
authors.forename: Stephanie K
authors.initials: SK
authors.lastname: Bonney
authors.forename: Tobias
authors.initials: T
authors.lastname: Eckle
mesh_terms: D000241:Adenosine / Q000378:metabolism; D000818:Animals; D006801:Humans; D017202:Myocardial Ischemia / Q000188:drug therapy / Q000235:genetics / Q000378:metabolism*; D043704:Receptor, Adenosine A2B / Q000235:genetics / Q000378:metabolism*; D015398:Signal Transduction
chemical_list: D043704:Receptor, Adenosine A2B; D000241:Adenosine
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