The adenosine A2A receptor - Myocardial protectant and coronary target in endotoxemia

Melissa E. Reichelt, Kevin J. Ashton, Xing Lin Tan, S. Jamal Mustafa, Catherine Ledent, Lea M D Delbridge, Polly A. Hofmann, John P. Headrick, R. Ray Morrison

Research output: Contribution to journalArticleResearchpeer-review

1 Citation (Scopus)

Abstract

Background: Cardiac injury and dysfunction are contributors to disease progression and mortality in sepsis. This study evaluated the cardiovascular role of intrinsic A2A adenosine receptor (A2AAR) activity during lipopolysaccharide (LPS)-induced inflammation. Methods: We assessed the impact of 24 h of LPS challenge (20 mg/kg, IP) on cardiac injury, coronary function and inflammatory mediator levels in Wild-Type (WT) mice and mice lacking functional A2AARs (A2AAR KO). Results: Cardiac injury was evident in LPS-treated WTs, with ∼7-fold elevation in serum cardiac troponin I (cTnI), and significant ventricular and coronary dysfunction. Absence of A2AARs increased LPS-provoked cTnI release at 24 h by 3-fold without additional demise of contraction function. Importantly, A 2AAR deletion per se emulated detrimental effects of LPS on coronary function, and LPS was without effect in coronary vessels lacking A 2AARs. Effects of A2AAR KO were independent of major shifts in circulating C-reactive protein (CRP) and haptoglobin. Cytokine responses were largely insensitive to A2AAR deletion; substantial LPS-induced elevations (up to 100-fold) in IFN-γ and IL-10 were unaltered in A2AAR KO mice, as were levels of IL-4 and TNF-α. However, late elevations in IL-2 and IL-5 were differentially modulated by A 2AAR KO (IL-2 reduced, IL-5 increased). Data demonstrate that in the context of LPS-triggered cardiac and coronary injury, A2AAR activity protects myocardial viability without modifying contractile dysfunction, and selectively modulates cytokine (IL-2, IL-5) release. A2AARs also appear to be targeted by LPS in the coronary vasculature. Conclusions: These experimental data suggest that preservation of A2AAR functionality might provide therapeutic benefit in human sepsis.

Original languageEnglish
Pages (from-to)672-680
Number of pages9
JournalInternational Journal of Cardiology
Volume166
Issue number3
DOIs
Publication statusPublished - 1 Jul 2013

Fingerprint

Adenosine A2A Receptors
Endotoxemia
Lipopolysaccharides
Interleukin-5
Interleukin-2
Troponin I
Wounds and Injuries
Sepsis
Cytokines
Ventricular Dysfunction
Haptoglobins
Interleukin-4
Interleukin-10
C-Reactive Protein
Disease Progression
Coronary Vessels
Inflammation

Cite this

Reichelt, M. E., Ashton, K. J., Tan, X. L., Mustafa, S. J., Ledent, C., Delbridge, L. M. D., ... Morrison, R. R. (2013). The adenosine A2A receptor - Myocardial protectant and coronary target in endotoxemia. International Journal of Cardiology, 166(3), 672-680. https://doi.org/10.1016/j.ijcard.2011.11.075
Reichelt, Melissa E. ; Ashton, Kevin J. ; Tan, Xing Lin ; Mustafa, S. Jamal ; Ledent, Catherine ; Delbridge, Lea M D ; Hofmann, Polly A. ; Headrick, John P. ; Morrison, R. Ray. / The adenosine A2A receptor - Myocardial protectant and coronary target in endotoxemia. In: International Journal of Cardiology. 2013 ; Vol. 166, No. 3. pp. 672-680.
@article{542b09f9e89d4c3da2def0a7cff751c3,
title = "The adenosine A2A receptor - Myocardial protectant and coronary target in endotoxemia",
abstract = "Background: Cardiac injury and dysfunction are contributors to disease progression and mortality in sepsis. This study evaluated the cardiovascular role of intrinsic A2A adenosine receptor (A2AAR) activity during lipopolysaccharide (LPS)-induced inflammation. Methods: We assessed the impact of 24 h of LPS challenge (20 mg/kg, IP) on cardiac injury, coronary function and inflammatory mediator levels in Wild-Type (WT) mice and mice lacking functional A2AARs (A2AAR KO). Results: Cardiac injury was evident in LPS-treated WTs, with ∼7-fold elevation in serum cardiac troponin I (cTnI), and significant ventricular and coronary dysfunction. Absence of A2AARs increased LPS-provoked cTnI release at 24 h by 3-fold without additional demise of contraction function. Importantly, A 2AAR deletion per se emulated detrimental effects of LPS on coronary function, and LPS was without effect in coronary vessels lacking A 2AARs. Effects of A2AAR KO were independent of major shifts in circulating C-reactive protein (CRP) and haptoglobin. Cytokine responses were largely insensitive to A2AAR deletion; substantial LPS-induced elevations (up to 100-fold) in IFN-γ and IL-10 were unaltered in A2AAR KO mice, as were levels of IL-4 and TNF-α. However, late elevations in IL-2 and IL-5 were differentially modulated by A 2AAR KO (IL-2 reduced, IL-5 increased). Data demonstrate that in the context of LPS-triggered cardiac and coronary injury, A2AAR activity protects myocardial viability without modifying contractile dysfunction, and selectively modulates cytokine (IL-2, IL-5) release. A2AARs also appear to be targeted by LPS in the coronary vasculature. Conclusions: These experimental data suggest that preservation of A2AAR functionality might provide therapeutic benefit in human sepsis.",
author = "Reichelt, {Melissa E.} and Ashton, {Kevin J.} and Tan, {Xing Lin} and Mustafa, {S. Jamal} and Catherine Ledent and Delbridge, {Lea M D} and Hofmann, {Polly A.} and Headrick, {John P.} and Morrison, {R. Ray}",
year = "2013",
month = "7",
day = "1",
doi = "10.1016/j.ijcard.2011.11.075",
language = "English",
volume = "166",
pages = "672--680",
journal = "European Journal of Cardiology",
issn = "0167-5273",
publisher = "Elsevier",
number = "3",

}

Reichelt, ME, Ashton, KJ, Tan, XL, Mustafa, SJ, Ledent, C, Delbridge, LMD, Hofmann, PA, Headrick, JP & Morrison, RR 2013, 'The adenosine A2A receptor - Myocardial protectant and coronary target in endotoxemia' International Journal of Cardiology, vol. 166, no. 3, pp. 672-680. https://doi.org/10.1016/j.ijcard.2011.11.075

The adenosine A2A receptor - Myocardial protectant and coronary target in endotoxemia. / Reichelt, Melissa E.; Ashton, Kevin J.; Tan, Xing Lin; Mustafa, S. Jamal; Ledent, Catherine; Delbridge, Lea M D; Hofmann, Polly A.; Headrick, John P.; Morrison, R. Ray.

In: International Journal of Cardiology, Vol. 166, No. 3, 01.07.2013, p. 672-680.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - The adenosine A2A receptor - Myocardial protectant and coronary target in endotoxemia

AU - Reichelt, Melissa E.

AU - Ashton, Kevin J.

AU - Tan, Xing Lin

AU - Mustafa, S. Jamal

AU - Ledent, Catherine

AU - Delbridge, Lea M D

AU - Hofmann, Polly A.

AU - Headrick, John P.

AU - Morrison, R. Ray

PY - 2013/7/1

Y1 - 2013/7/1

N2 - Background: Cardiac injury and dysfunction are contributors to disease progression and mortality in sepsis. This study evaluated the cardiovascular role of intrinsic A2A adenosine receptor (A2AAR) activity during lipopolysaccharide (LPS)-induced inflammation. Methods: We assessed the impact of 24 h of LPS challenge (20 mg/kg, IP) on cardiac injury, coronary function and inflammatory mediator levels in Wild-Type (WT) mice and mice lacking functional A2AARs (A2AAR KO). Results: Cardiac injury was evident in LPS-treated WTs, with ∼7-fold elevation in serum cardiac troponin I (cTnI), and significant ventricular and coronary dysfunction. Absence of A2AARs increased LPS-provoked cTnI release at 24 h by 3-fold without additional demise of contraction function. Importantly, A 2AAR deletion per se emulated detrimental effects of LPS on coronary function, and LPS was without effect in coronary vessels lacking A 2AARs. Effects of A2AAR KO were independent of major shifts in circulating C-reactive protein (CRP) and haptoglobin. Cytokine responses were largely insensitive to A2AAR deletion; substantial LPS-induced elevations (up to 100-fold) in IFN-γ and IL-10 were unaltered in A2AAR KO mice, as were levels of IL-4 and TNF-α. However, late elevations in IL-2 and IL-5 were differentially modulated by A 2AAR KO (IL-2 reduced, IL-5 increased). Data demonstrate that in the context of LPS-triggered cardiac and coronary injury, A2AAR activity protects myocardial viability without modifying contractile dysfunction, and selectively modulates cytokine (IL-2, IL-5) release. A2AARs also appear to be targeted by LPS in the coronary vasculature. Conclusions: These experimental data suggest that preservation of A2AAR functionality might provide therapeutic benefit in human sepsis.

AB - Background: Cardiac injury and dysfunction are contributors to disease progression and mortality in sepsis. This study evaluated the cardiovascular role of intrinsic A2A adenosine receptor (A2AAR) activity during lipopolysaccharide (LPS)-induced inflammation. Methods: We assessed the impact of 24 h of LPS challenge (20 mg/kg, IP) on cardiac injury, coronary function and inflammatory mediator levels in Wild-Type (WT) mice and mice lacking functional A2AARs (A2AAR KO). Results: Cardiac injury was evident in LPS-treated WTs, with ∼7-fold elevation in serum cardiac troponin I (cTnI), and significant ventricular and coronary dysfunction. Absence of A2AARs increased LPS-provoked cTnI release at 24 h by 3-fold without additional demise of contraction function. Importantly, A 2AAR deletion per se emulated detrimental effects of LPS on coronary function, and LPS was without effect in coronary vessels lacking A 2AARs. Effects of A2AAR KO were independent of major shifts in circulating C-reactive protein (CRP) and haptoglobin. Cytokine responses were largely insensitive to A2AAR deletion; substantial LPS-induced elevations (up to 100-fold) in IFN-γ and IL-10 were unaltered in A2AAR KO mice, as were levels of IL-4 and TNF-α. However, late elevations in IL-2 and IL-5 were differentially modulated by A 2AAR KO (IL-2 reduced, IL-5 increased). Data demonstrate that in the context of LPS-triggered cardiac and coronary injury, A2AAR activity protects myocardial viability without modifying contractile dysfunction, and selectively modulates cytokine (IL-2, IL-5) release. A2AARs also appear to be targeted by LPS in the coronary vasculature. Conclusions: These experimental data suggest that preservation of A2AAR functionality might provide therapeutic benefit in human sepsis.

UR - http://www.scopus.com/inward/record.url?scp=84893510565&partnerID=8YFLogxK

U2 - 10.1016/j.ijcard.2011.11.075

DO - 10.1016/j.ijcard.2011.11.075

M3 - Article

VL - 166

SP - 672

EP - 680

JO - European Journal of Cardiology

JF - European Journal of Cardiology

SN - 0167-5273

IS - 3

ER -