Schmid, Franz-Xaver and Floerchinger, Bernhard and Vudattu, Nalini Kumar and Eissner, Günther and Haubitz, Marion and Holler, Ernst and Andreesen, Reinhard and Birnbaum, Dietrich E. (2006) Direct evidence of endothelial injury during cardiopulmonary bypass by demonstration of circulating endothelial cells. Perfusion 21 (3), pp. 133-137.
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Endothelial activation is considered a key process in the development of a whole body inflammatory response secondary to cardiopulmonary bypass (CPB). Increased levels of a multitude of soluble mediators have been described as being released during and after cardiac surgery. Circulating endothelial cells have recently been established as a novel marker of endothelial damage in a variety of vascular disorders. Blood samples from 20 patients undergoing elective coronary artery bypass surgery were obtained preoperatively and 1, 6, 12, 24, and 48 h after termination of CPB. Control samples were obtained from ten healthy volunteers. Circulating endothelial cells (CEC) were isolated with immunomagnetic anti-CD146-coated Dynabeads, and counted in a Nageotte chamber. Low numbers of CEC were observed in healthy control volunteers (12 +/- 6 cells/mL; median: 9 cells/mL). CEC numbers were already significantly elevated in all patients before CPB, and there was a further significant increase after weaning from CPB (maximum increase at 6 h after CPB: 73 +/- 30 cells/mL; range: 30-153 cells/mL, p < 0.001). The number of CEC provides further and direct evidence that CPB is associated with a pronounced endothelial injury and/or damage. CEC appear to be most useful markers for vascular endothelial activation because they are specific, stable, and circulating components of injured vessel wall.
|Institutions:||Medicine > Lehrstuhl für Herz-, Thorax- und herznahe Gefäßchirurgie|
|Subjects:||600 Technology > 610 Medical sciences Medicine|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||30 Mar 2007|
|Last Modified:||20 Apr 2010 09:03|