Monocyte Fc gamma receptor expression in patients undergoing coronary artery bypass grafting

Stefanou, Demetrius C. and Asimakopoulos, George and Yagnik, Darshna and Haskard, Dorian O. and Anderson, Jon R. and Philippidis, Pandelis and Landis, R. Clive and Taylor, Kenneth M. (2004) Monocyte Fc gamma receptor expression in patients undergoing coronary artery bypass grafting. Annals of Thoracic Surgery, 77 (3). pp. 951-955. ISSN 0003-4975

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Abstract

BACKGROUND: Cardiopulmonary bypass is associated with an inflammatory response with potential deleterious effects. The white cell subpopulation mostly investigated so far is the neutrophil. To date very little has been investigated regarding the role of the monocyte/macrophage. This study focuses on the expression of Fc gamma receptors I, II, and III by monocytes in patients undergoing cardiopulmonary bypass. METHODS: We studied the surface expression of Fc gamma receptors I, II, and III by flow cytometry on gated monocyte subpopulations in the whole blood of adult patients undergoing elective coronary artery bypass grafting. Blood samples were drawn preoperatively and at 15 minutes, 1, 2, 4, 24, 48, and 72 hours, and 6 days postoperatively. A second group of patients undergoing lung resection surgery were studied in a similar fashion. RESULTS: Neither Fc receptor I nor receptor II expression were significantly changed throughout the time points studied. Fc receptor III expression was reduced at 2 and 4 hours (p = 0.016 and 0.002) and increased at 24, 48, and 72 hours after commencement of CPB on a selected subpopulation (15%–35%) of monocytes (p = 0.004, < 0.001, and < 0.001, respectively). This expression returned to preoperative levels by the sixth postoperative day. There were no statistically significant changes in the lung resection group. CONCLUSIONS: Our study demonstrated that cardiopulmonary bypass is associated with a biphasic Fc gamma receptor III expression on a subpopulation of peripheral blood monocytes up to 3 days postoperatively.

Item Type:Article
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PubMed PMID: 14992905

Research Areas:School of Science and Technology > Natural Sciences
Citations on ISI Web of Science:6
ID Code:2496
Deposited On:17 Jun 2009 10:52
Last Modified:11 Jun 2013 04:59

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