Adenosine A2A Activation Attenuates Nontransplantation Lung Reperfusion Injury

Peter I. Ellman, T. Brett Reece, Marianna G. Law, Leo M. Gazoni, Ramesh Singh, Victor E. Laubach, Joel Linden, Curtis G. Tribble, Irving L. Kron

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10 Scopus citations


Background: Lung reperfusion injury is a significant problem in cardiothoracic surgery. Previous studies have demonstrated that an adenosine A2A agonist can attenuate lung reperfusion injury in a lung transplantation model. There has been little work, however, examining its effects in the setting of nontransplant ischemia reperfusion. Our hypothesis was that an A2A agonist would attenuate lung reperfusion injury in a warm ischemia hilar clamping model. Study design: Sprague Dawley rats underwent 90 min of left hilar clamping followed by 4 h of reperfusion. Group 1 (n = 13) received an intravenous infusion of 0.06 ug/kg/min of ATL-146e, which was started 10 min before reperfusion. Group 2 (n = 16) received an equivalent saline infusion. A third sham group (n = 14) received the same protocol as Group 2 but no lung ischemia. Results: Animals receiving ATL-146e showed significant improvements in oxygenation (Group 1: 447 ± 26.02 mmHg versus Group 2: 223 ± 24.46 mmHg (P < 0.001) as well as ventilation (pCO2 Group 1: 48.78 ± 3.88 versus Group 2: 63.56 ± 4.80 (P = 0.009)). Total protein in the bronchoalveolar lavage was significantly higher in the saline group compared with the adenosine as well as a higher proportion of neutrophils. Histological analysis demonstrated a significantly higher number of neutrophils in the IR group compared with the adenosine group. Conclusions: ATL-146e, an adenosine analogue that is a specific agonist for the A2A receptor, attenuates reperfusion injury in an in vivo rat lung model. Arterial blood gas measurements demonstrate a statistically significant increase in oxygenation and improved ventilation.

Original languageEnglish (US)
Pages (from-to)3-8
Number of pages6
JournalJournal of Surgical Research
Issue number1
StatePublished - Sep 2008


  • adenosine
  • adenosine A
  • lung reperfusion injury

ASJC Scopus subject areas

  • Surgery


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