Journal of Molecular Medicine

, Volume 91, Issue 2, pp 173–181

Adenosine signaling during acute and chronic disease states

  • Harry Karmouty-Quintana
  • Yang Xia
  • Michael R. Blackburn
Review

DOI: 10.1007/s00109-013-0997-1

Cite this article as:
Karmouty-Quintana, H., Xia, Y. & Blackburn, M.R. J Mol Med (2013) 91: 173. doi:10.1007/s00109-013-0997-1

Abstract

Adenosine is a signaling nucleoside that is produced following tissue injury, particularly injury involving ischemia and hypoxia. The production of extracellular adenosine and its subsequent signaling through adenosine receptors plays an important role in orchestrating injury responses in multiple organs. There are four adenosine receptors that are widely distributed on immune, epithelial, endothelial, neuronal,and stromal cells throughout the body. Interestingly, these receptors are subject to altered regulation following injury. Studies in mouse models and human cells and tissues have identified that the production of adenosine and its subsequent signaling through its receptors plays largely beneficial roles in acute disease states, with the exception of brain injury. In contrast, if elevated adenosine levels are sustained beyond the acute injury phase, adenosine responses can become detrimental by activating pathways that promote tissue injury and fibrosis. Understanding when during the course of disease adenosine signaling is beneficial as opposed to detrimental and defining the mechanisms involved will be critical for the advancement of adenosine-based therapies for acute and chronic diseases. The purpose of this review is to discuss key observations that define the beneficial and detrimental aspects of adenosine signaling during acute and chronic disease states with an emphasis on cellular processes, such as inflammatory cell regulation, vascular barrier function, and tissue fibrosis.

Keywords

Adenosine receptorsInflammationFibrosisVascular barrier functionCD73ADORA2BADORA2AADORA3ADORA1Acute lung injuryRemodelingAnti-inflammatory

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Harry Karmouty-Quintana
    • 1
  • Yang Xia
    • 1
  • Michael R. Blackburn
    • 1
  1. 1.Department of Biochemistry and Molecular BiologyThe University of Texas Medical School at HoustonHoustonUSA