Submit a comment

Equilibrative nucleoside transporter 1 (ENT1) regulates postischemic blood flow during acute kidney injury in mice
Almut Grenz, Jessica D. Bauerle, Julee H. Dalton, Douglas Ridyard, Alexander Badulak, Eunyoung Tak, Eóin N. McNamee, Eric Clambey, Radu Moldovan, German Reyes, Jost Klawitter, Kelly Ambler, Kristann Magee, Uwe Christians, Kelley S. Brodsky, Katya Ravid, Doo-Sup Choi, Jiaming Wen, Dmitriy Lukashev, Michael R. Blackburn, Hartmut Osswald, Imogen R. Coe, Bernd Nürnberg, Volker H. Haase, Yang Xia, Michail Sitkovsky, Holger K. Eltzschig
Almut Grenz, Jessica D. Bauerle, Julee H. Dalton, Douglas Ridyard, Alexander Badulak, Eunyoung Tak, Eóin N. McNamee, Eric Clambey, Radu Moldovan, German Reyes, Jost Klawitter, Kelly Ambler, Kristann Magee, Uwe Christians, Kelley S. Brodsky, Katya Ravid, Doo-Sup Choi, Jiaming Wen, Dmitriy Lukashev, Michael R. Blackburn, Hartmut Osswald, Imogen R. Coe, Bernd Nürnberg, Volker H. Haase, Yang Xia, Michail Sitkovsky, Holger K. Eltzschig
View: Text | PDF | Expression of concern | Retraction
Research Article

Equilibrative nucleoside transporter 1 (ENT1) regulates postischemic blood flow during acute kidney injury in mice

Abstract

A complex biologic network regulates kidney perfusion under physiologic conditions. This system is profoundly perturbed following renal ischemia, a leading cause of acute kidney injury (AKI) — a life-threatening condition that frequently complicates the care of hospitalized patients. Therapeutic approaches to prevent and treat AKI are extremely limited. Better understanding of the molecular pathways promoting postischemic reflow could provide new candidate targets for AKI therapeutics. Due to its role in adapting tissues to hypoxia, we hypothesized that extracellular adenosine has a regulatory function in the postischemic control of renal perfusion. Consistent with the notion that equilibrative nucleoside transporters (ENTs) terminate adenosine signaling, we observed that pharmacologic ENT inhibition in mice elevated renal adenosine levels and dampened AKI. Deletion of the ENTs resulted in selective protection in Ent1–/– mice. Comprehensive examination of adenosine receptor–knockout mice exposed to AKI demonstrated that renal protection by ENT inhibitors involves the A2B adenosine receptor. Indeed, crosstalk between renal Ent1 and Adora2b expressed on vascular endothelia effectively prevented a postischemic no-reflow phenomenon. These studies identify ENT1 and adenosine receptors as key to the process of reestablishing renal perfusion following ischemic AKI. If translatable from mice to humans, these data have important therapeutic implications.

Authors

Almut Grenz, Jessica D. Bauerle, Julee H. Dalton, Douglas Ridyard, Alexander Badulak, Eunyoung Tak, Eóin N. McNamee, Eric Clambey, Radu Moldovan, German Reyes, Jost Klawitter, Kelly Ambler, Kristann Magee, Uwe Christians, Kelley S. Brodsky, Katya Ravid, Doo-Sup Choi, Jiaming Wen, Dmitriy Lukashev, Michael R. Blackburn, Hartmut Osswald, Imogen R. Coe, Bernd Nürnberg, Volker H. Haase, Yang Xia, Michail Sitkovsky, Holger K. Eltzschig

×

Guidelines

The Editorial Board will only consider comments that are deemed relevant and of interest to readers. The Journal will not post data that have not been subjected to peer review; or a comment that is essentially a reiteration of another comment.

  • Comments appear on the Journal’s website and are linked from the original article’s web page.
  • Authors are notified by email if their comments are posted.
  • The Journal reserves the right to edit comments for length and clarity.
  • No appeals will be considered.
  • Comments are not indexed in PubMed.

Specific requirements

  • Maximum length, 400 words
  • Entered as plain text or HTML
  • Author’s name and email address, to be posted with the comment
  • Declaration of all potential conflicts of interest (even if these are not ultimately posted); see the Journal’s conflict-of-interest policy
  • Comments may not include figures
This field is required
This field is required
This field is required
This field is required
This field is required
This field is required