author_facet Koeppen, Michael
Harter, Patrick N.
Bonney, Stephanie
Bonney, Megan
Reithel, Susan
Zachskorn, Cornelia
Mittelbronn, Michel
Eckle, Tobias
Koeppen, Michael
Harter, Patrick N.
Bonney, Stephanie
Bonney, Megan
Reithel, Susan
Zachskorn, Cornelia
Mittelbronn, Michel
Eckle, Tobias
author Koeppen, Michael
Harter, Patrick N.
Bonney, Stephanie
Bonney, Megan
Reithel, Susan
Zachskorn, Cornelia
Mittelbronn, Michel
Eckle, Tobias
spellingShingle Koeppen, Michael
Harter, Patrick N.
Bonney, Stephanie
Bonney, Megan
Reithel, Susan
Zachskorn, Cornelia
Mittelbronn, Michel
Eckle, Tobias
Anesthesiology
Adora2b Signaling on Bone Marrow Derived Cells Dampens Myocardial Ischemia-Reperfusion Injury
Anesthesiology and Pain Medicine
author_sort koeppen, michael
spelling Koeppen, Michael Harter, Patrick N. Bonney, Stephanie Bonney, Megan Reithel, Susan Zachskorn, Cornelia Mittelbronn, Michel Eckle, Tobias 0003-3022 Ovid Technologies (Wolters Kluwer Health) Anesthesiology and Pain Medicine http://dx.doi.org/10.1097/aln.0b013e318255793c <jats:sec> <jats:title>Background</jats:title> <jats:p>Cardiac ischemia-reperfusion (I-R) injury represents a major cause of cardiac tissue injury. Adenosine signaling dampens inflammation during cardiac I-R. The authors investigated the role of the adenosine A2b-receptor (Adora2b) on inflammatory cells during cardiac I-R.</jats:p> </jats:sec> <jats:sec> <jats:title>Methods</jats:title> <jats:p>To study Adora2b signaling on inflammatory cells, the authors transplanted wild-type (WT) bone marrow (BM) into Adora2b(-/-) mice or Adora2b(-/-) BM into WT mice. To study the role of polymorphonuclear leukocytes (PMNs), neutrophil-depleted WT mice were treated with an Adora2b agonist. After treatments, mice were exposed to 60 min of myocardial ischemia and 120 min of reperfusion. Infarct sizes and troponin I concentrations were determined by triphenyltetrazolium chloride staining and enzyme-linked immunosorbent assay, respectively.</jats:p> </jats:sec> <jats:sec> <jats:title>Results</jats:title> <jats:p>Transplantation of WT BM into Adora2b(-/-) mice decreased infarct sizes by 19 ± 4% and troponin I by 87.5 ± 25.3 ng/ml (mean ± SD, n = 6). Transplantation of Adora2b(-/-) BM into WT mice increased infarct sizes by 20 ± 3% and troponin I concentrations by 69.7 ± 17.9 ng/ml (mean ± SD, n = 6). Studies on the reperfused myocardium revealed PMNs as the dominant cell type. PMN depletion or Adora2b agonist treatment reduced infarct sizes by 30 ± 11% or 26 ± 13% (mean ± SD, n = 4); however, the combination of both did not produce additional cardioprotection. Cytokine profiling showed significantly higher cardiac tumor necrosis factor α concentrations in Adora2b(-/-) compared with WT mice (39.3 ± 5.3 vs. 7.5 ± 1.0 pg/mg protein, mean ± SD, n = 4). Pharmacologic studies on human-activated PMNs revealed an Adora2b-dependent tumor necrosis factor α release.</jats:p> </jats:sec> <jats:sec> <jats:title>Conclusion</jats:title> <jats:p>Adora2b signaling on BM-derived cells such as PMNs represents an endogenous cardioprotective mechanism during cardiac I-R. The authors' findings suggest that Adora2b agonist treatment during cardiac I-R reduces tumor necrosis factor α release of PMNs, thereby dampening tissue injury.</jats:p> </jats:sec> Adora2b Signaling on Bone Marrow Derived Cells Dampens Myocardial Ischemia-Reperfusion Injury Anesthesiology
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title Adora2b Signaling on Bone Marrow Derived Cells Dampens Myocardial Ischemia-Reperfusion Injury
title_unstemmed Adora2b Signaling on Bone Marrow Derived Cells Dampens Myocardial Ischemia-Reperfusion Injury
title_full Adora2b Signaling on Bone Marrow Derived Cells Dampens Myocardial Ischemia-Reperfusion Injury
title_fullStr Adora2b Signaling on Bone Marrow Derived Cells Dampens Myocardial Ischemia-Reperfusion Injury
title_full_unstemmed Adora2b Signaling on Bone Marrow Derived Cells Dampens Myocardial Ischemia-Reperfusion Injury
title_short Adora2b Signaling on Bone Marrow Derived Cells Dampens Myocardial Ischemia-Reperfusion Injury
title_sort adora2b signaling on bone marrow derived cells dampens myocardial ischemia-reperfusion injury
topic Anesthesiology and Pain Medicine
url http://dx.doi.org/10.1097/aln.0b013e318255793c
publishDate 2012
physical 1245-1257
description <jats:sec> <jats:title>Background</jats:title> <jats:p>Cardiac ischemia-reperfusion (I-R) injury represents a major cause of cardiac tissue injury. Adenosine signaling dampens inflammation during cardiac I-R. The authors investigated the role of the adenosine A2b-receptor (Adora2b) on inflammatory cells during cardiac I-R.</jats:p> </jats:sec> <jats:sec> <jats:title>Methods</jats:title> <jats:p>To study Adora2b signaling on inflammatory cells, the authors transplanted wild-type (WT) bone marrow (BM) into Adora2b(-/-) mice or Adora2b(-/-) BM into WT mice. To study the role of polymorphonuclear leukocytes (PMNs), neutrophil-depleted WT mice were treated with an Adora2b agonist. After treatments, mice were exposed to 60 min of myocardial ischemia and 120 min of reperfusion. Infarct sizes and troponin I concentrations were determined by triphenyltetrazolium chloride staining and enzyme-linked immunosorbent assay, respectively.</jats:p> </jats:sec> <jats:sec> <jats:title>Results</jats:title> <jats:p>Transplantation of WT BM into Adora2b(-/-) mice decreased infarct sizes by 19 ± 4% and troponin I by 87.5 ± 25.3 ng/ml (mean ± SD, n = 6). Transplantation of Adora2b(-/-) BM into WT mice increased infarct sizes by 20 ± 3% and troponin I concentrations by 69.7 ± 17.9 ng/ml (mean ± SD, n = 6). Studies on the reperfused myocardium revealed PMNs as the dominant cell type. PMN depletion or Adora2b agonist treatment reduced infarct sizes by 30 ± 11% or 26 ± 13% (mean ± SD, n = 4); however, the combination of both did not produce additional cardioprotection. Cytokine profiling showed significantly higher cardiac tumor necrosis factor α concentrations in Adora2b(-/-) compared with WT mice (39.3 ± 5.3 vs. 7.5 ± 1.0 pg/mg protein, mean ± SD, n = 4). Pharmacologic studies on human-activated PMNs revealed an Adora2b-dependent tumor necrosis factor α release.</jats:p> </jats:sec> <jats:sec> <jats:title>Conclusion</jats:title> <jats:p>Adora2b signaling on BM-derived cells such as PMNs represents an endogenous cardioprotective mechanism during cardiac I-R. The authors' findings suggest that Adora2b agonist treatment during cardiac I-R reduces tumor necrosis factor α release of PMNs, thereby dampening tissue injury.</jats:p> </jats:sec>
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author Koeppen, Michael, Harter, Patrick N., Bonney, Stephanie, Bonney, Megan, Reithel, Susan, Zachskorn, Cornelia, Mittelbronn, Michel, Eckle, Tobias
author_facet Koeppen, Michael, Harter, Patrick N., Bonney, Stephanie, Bonney, Megan, Reithel, Susan, Zachskorn, Cornelia, Mittelbronn, Michel, Eckle, Tobias, Koeppen, Michael, Harter, Patrick N., Bonney, Stephanie, Bonney, Megan, Reithel, Susan, Zachskorn, Cornelia, Mittelbronn, Michel, Eckle, Tobias
author_sort koeppen, michael
container_issue 6
container_start_page 1245
container_title Anesthesiology
container_volume 116
description <jats:sec> <jats:title>Background</jats:title> <jats:p>Cardiac ischemia-reperfusion (I-R) injury represents a major cause of cardiac tissue injury. Adenosine signaling dampens inflammation during cardiac I-R. The authors investigated the role of the adenosine A2b-receptor (Adora2b) on inflammatory cells during cardiac I-R.</jats:p> </jats:sec> <jats:sec> <jats:title>Methods</jats:title> <jats:p>To study Adora2b signaling on inflammatory cells, the authors transplanted wild-type (WT) bone marrow (BM) into Adora2b(-/-) mice or Adora2b(-/-) BM into WT mice. To study the role of polymorphonuclear leukocytes (PMNs), neutrophil-depleted WT mice were treated with an Adora2b agonist. After treatments, mice were exposed to 60 min of myocardial ischemia and 120 min of reperfusion. Infarct sizes and troponin I concentrations were determined by triphenyltetrazolium chloride staining and enzyme-linked immunosorbent assay, respectively.</jats:p> </jats:sec> <jats:sec> <jats:title>Results</jats:title> <jats:p>Transplantation of WT BM into Adora2b(-/-) mice decreased infarct sizes by 19 ± 4% and troponin I by 87.5 ± 25.3 ng/ml (mean ± SD, n = 6). Transplantation of Adora2b(-/-) BM into WT mice increased infarct sizes by 20 ± 3% and troponin I concentrations by 69.7 ± 17.9 ng/ml (mean ± SD, n = 6). Studies on the reperfused myocardium revealed PMNs as the dominant cell type. PMN depletion or Adora2b agonist treatment reduced infarct sizes by 30 ± 11% or 26 ± 13% (mean ± SD, n = 4); however, the combination of both did not produce additional cardioprotection. Cytokine profiling showed significantly higher cardiac tumor necrosis factor α concentrations in Adora2b(-/-) compared with WT mice (39.3 ± 5.3 vs. 7.5 ± 1.0 pg/mg protein, mean ± SD, n = 4). Pharmacologic studies on human-activated PMNs revealed an Adora2b-dependent tumor necrosis factor α release.</jats:p> </jats:sec> <jats:sec> <jats:title>Conclusion</jats:title> <jats:p>Adora2b signaling on BM-derived cells such as PMNs represents an endogenous cardioprotective mechanism during cardiac I-R. The authors' findings suggest that Adora2b agonist treatment during cardiac I-R reduces tumor necrosis factor α release of PMNs, thereby dampening tissue injury.</jats:p> </jats:sec>
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spelling Koeppen, Michael Harter, Patrick N. Bonney, Stephanie Bonney, Megan Reithel, Susan Zachskorn, Cornelia Mittelbronn, Michel Eckle, Tobias 0003-3022 Ovid Technologies (Wolters Kluwer Health) Anesthesiology and Pain Medicine http://dx.doi.org/10.1097/aln.0b013e318255793c <jats:sec> <jats:title>Background</jats:title> <jats:p>Cardiac ischemia-reperfusion (I-R) injury represents a major cause of cardiac tissue injury. Adenosine signaling dampens inflammation during cardiac I-R. The authors investigated the role of the adenosine A2b-receptor (Adora2b) on inflammatory cells during cardiac I-R.</jats:p> </jats:sec> <jats:sec> <jats:title>Methods</jats:title> <jats:p>To study Adora2b signaling on inflammatory cells, the authors transplanted wild-type (WT) bone marrow (BM) into Adora2b(-/-) mice or Adora2b(-/-) BM into WT mice. To study the role of polymorphonuclear leukocytes (PMNs), neutrophil-depleted WT mice were treated with an Adora2b agonist. After treatments, mice were exposed to 60 min of myocardial ischemia and 120 min of reperfusion. Infarct sizes and troponin I concentrations were determined by triphenyltetrazolium chloride staining and enzyme-linked immunosorbent assay, respectively.</jats:p> </jats:sec> <jats:sec> <jats:title>Results</jats:title> <jats:p>Transplantation of WT BM into Adora2b(-/-) mice decreased infarct sizes by 19 ± 4% and troponin I by 87.5 ± 25.3 ng/ml (mean ± SD, n = 6). Transplantation of Adora2b(-/-) BM into WT mice increased infarct sizes by 20 ± 3% and troponin I concentrations by 69.7 ± 17.9 ng/ml (mean ± SD, n = 6). Studies on the reperfused myocardium revealed PMNs as the dominant cell type. PMN depletion or Adora2b agonist treatment reduced infarct sizes by 30 ± 11% or 26 ± 13% (mean ± SD, n = 4); however, the combination of both did not produce additional cardioprotection. Cytokine profiling showed significantly higher cardiac tumor necrosis factor α concentrations in Adora2b(-/-) compared with WT mice (39.3 ± 5.3 vs. 7.5 ± 1.0 pg/mg protein, mean ± SD, n = 4). Pharmacologic studies on human-activated PMNs revealed an Adora2b-dependent tumor necrosis factor α release.</jats:p> </jats:sec> <jats:sec> <jats:title>Conclusion</jats:title> <jats:p>Adora2b signaling on BM-derived cells such as PMNs represents an endogenous cardioprotective mechanism during cardiac I-R. The authors' findings suggest that Adora2b agonist treatment during cardiac I-R reduces tumor necrosis factor α release of PMNs, thereby dampening tissue injury.</jats:p> </jats:sec> Adora2b Signaling on Bone Marrow Derived Cells Dampens Myocardial Ischemia-Reperfusion Injury Anesthesiology
spellingShingle Koeppen, Michael, Harter, Patrick N., Bonney, Stephanie, Bonney, Megan, Reithel, Susan, Zachskorn, Cornelia, Mittelbronn, Michel, Eckle, Tobias, Anesthesiology, Adora2b Signaling on Bone Marrow Derived Cells Dampens Myocardial Ischemia-Reperfusion Injury, Anesthesiology and Pain Medicine
title Adora2b Signaling on Bone Marrow Derived Cells Dampens Myocardial Ischemia-Reperfusion Injury
title_full Adora2b Signaling on Bone Marrow Derived Cells Dampens Myocardial Ischemia-Reperfusion Injury
title_fullStr Adora2b Signaling on Bone Marrow Derived Cells Dampens Myocardial Ischemia-Reperfusion Injury
title_full_unstemmed Adora2b Signaling on Bone Marrow Derived Cells Dampens Myocardial Ischemia-Reperfusion Injury
title_short Adora2b Signaling on Bone Marrow Derived Cells Dampens Myocardial Ischemia-Reperfusion Injury
title_sort adora2b signaling on bone marrow derived cells dampens myocardial ischemia-reperfusion injury
title_unstemmed Adora2b Signaling on Bone Marrow Derived Cells Dampens Myocardial Ischemia-Reperfusion Injury
topic Anesthesiology and Pain Medicine
url http://dx.doi.org/10.1097/aln.0b013e318255793c