Abstract
In the present observational study, we measured serum levels of the chemokine stromal cell-derived factor-1α (SDF-1α) in 100 patients undergoing cardiac surgery with cardiopulmonary bypass at seven distinct time points including preoperative values, myocardial ischemia, reperfusion, and the postoperative course. Myocardial ischemia triggered a marked increase of SDF-1α serum levels whereas cardiac reperfusion had no significant influence. Perioperative SDF-1α serum levels were influenced by patients’ characteristics (e.g., age, gender, aspirin intake). In an explorative analysis, we observed an inverse association between SDF-1α serum levels and the incidence of organ dysfunction. In conclusion, time of myocardial ischemia was identified as the key stimulus for a significant upregulation of SDF-1α, indicating its role as a marker of myocardial injury. The inverse association between SDF-1α levels and organ dysfunction association encourages further studies to evaluate its organoprotective properties in cardiac surgery patients.
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Abbreviations
- CABG:
-
Coronary artery bypass graft
- CAD:
-
Coronary artery disease
- CK-MB:
-
Creatine kinase isoenzyme MB
- CPB:
-
Cardiopulmonary bypass
- EPC:
-
Endothelial progenitor cells
- FCS:
-
Fetal calf serum
- HIF-1α:
-
Hypoxia-inducible factor 1α
- HUVEC:
-
Human umbilical vein endothelial cells
- I/R:
-
Ischemia/reperfusion
- ICU:
-
Intensive care unit
- MIF:
-
Macrophage migration inhibitory factor
- PCT:
-
Procalcitonin
- SAPS II:
-
Simplified acute physiology score II
- SDF-1:
-
Stromal cell-derived factor 1
- SIRS:
-
Systemic inflammatory response syndrome
- WBC:
-
White blood cells
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Human Study
All patients provided written consent, the study protocol conforms to the ethical guidelines of the 1975 Declaration of Helsinki, and the study was approved by the local ethics committee (Ethikkommission RWTH Aachen, EK 151/09).
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No animal studies were carried out by the authors for this article.
Sources of Funding
Bong-Sung Kim is supported by “START”, a program for young scientists of the Medical Faculty at the RWTH Aachen University (Project number: 691346, START 2013–2) and the Research Fellowship Program of the German Research Foundation (Deutsche Forschungsgemeinschaft (DFG), GZ: KI 1973/1-1). Norbert Pallua is supported by DFG grant PA 1271/5-1. Jürgen Bernhagen is supported by DFG grants SFB1123/P03; SFB/TRR57-P07, and DFG BE1977/7-1, as well as by DFG within the framework of the Munich Cluster for Systems Neurology (EXC 1010 SyNergy). Christian Stoppe is supported by DFG grant DFG STO 1099/2-1.
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The authors declare that they have no conflict of interest.
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Editor-in-Chief Jennifer L. Hall oversaw the review of this article
All authors take responsibility for all aspects of the reliability and freedom from bias of the data presented and their discussed interpretation
Bong-Sung Kim, Denise Jacobs, David Simons and Christian Stoppe contributed equally to this work.
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Kim, BS., Jacobs, D., Emontzpohl, C. et al. Myocardial Ischemia Induces SDF-1α Release in Cardiac Surgery Patients. J. of Cardiovasc. Trans. Res. 9, 230–238 (2016). https://doi.org/10.1007/s12265-016-9689-x
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DOI: https://doi.org/10.1007/s12265-016-9689-x