title: Changes in adhesion molecule expression and oxidative burst activity of granulocytes and monocytes during open-heart surgery with cardiopulmonary bypass compared with abdominal surgery.
abstract: Cardiac and major abdominal surgery are associated with granulocytosis in peripheral blood. The purpose of the present study was to describe the granulocyte and monocyte oxidative burst and the expression of adhesion molecules following cardiac surgery with cardiopulmonary bypass and abdominal surgery. The ability to respond with an oxidative burst was measured by means of flow cytometry using 123-dihydrorhodamine. The adhesion molecules CD11a/CD18, CD11c/CD18, CD44 were measured using monoclonal antibodies. Blood samples from eight patients undergoing open-heart surgery were taken before surgery, 1, 5, 10 and 20 min after aortic clamping, and then 1, 5, 10 and 20 min and 1, 2 and 3 h after declamping. Samples from eight patients undergoing abdominal surgery were taken before surgery, at the end of surgery, and 2 and 3 h post-operatively. A decrease in number of granulocytes and monocytes during cardiopulmonary bypass was observed. The percentage of CD11a-positive granulocytes increased from 30% pre-operatively to 75% following cardiopulmonary bypass, while CD44-positive granulocytes increased from 5% to 13%. Despite the extent of the changes, these were not significant. The oxidative burst of the granulocytes and monocytes decreased after declamping to 15% and 27% of initial values in vitro. Several hours after surgery, there was no significant difference between the two groups. These results can be explained by a granulocyte and monocyte refractory response developing subsequent to an increased per-operative oxidative burst activity, and the induction of adhesion molecules on granulocytes associated with the cardiopulmonary bypass and surgery. In conclusion, open-heart surgery with cardiopulmonary bypass was associated with a rapid and pronounced activation of leukocytes which may play a role in reperfusion injury.
authors.affiliation: Department of Anaesthesiology and Intensive Care, Skejby University Hospital, Aarhus, Denmark.
authors.forename: P
authors.initials: P
authors.lastname: Toft
authors.forename: C H
authors.initials: CH
authors.lastname: Nielsen
authors.forename: E
authors.initials: E
authors.lastname: Tønnesen
authors.forename: T G
authors.initials: TG
authors.lastname: Hansen
authors.forename: M
authors.initials: M
authors.lastname: Hokland
mesh_terms: D000911:Antibodies, Monoclonal; D018821:CD18 Antigens / Q000097:blood* / Q000235:genetics; D006348:Cardiac Surgical Procedures; D002315:Cardiopulmonary Bypass; D005260:Female; D005434:Flow Cytometry; D005456:Fluorescent Dyes; D005500:Follow-Up Studies; D005786:Gene Expression Regulation; D006098:Granulocytes / Q000187:drug effects / Q000378:metabolism*; D006801:Humans; D018960:Hyaluronan Receptors / Q000097:blood* / Q000235:genetics; D007044:Hysterectomy; D016167:Integrin alphaXbeta2 / Q000097:blood* / Q000235:genetics; D007958:Leukocyte Count; D016169:Lymphocyte Function-Associated Antigen-1 / Q000097:blood* / Q000235:genetics; D008297:Male; D008875:Middle Aged; D009000:Monocytes / Q000187:drug effects / Q000378:metabolism*; D015427:Reperfusion Injury / Q000097:blood; D016897:Respiratory Burst / Q000187:drug effects / Q000235:genetics / Q000502:physiology*; D012235:Rhodamines; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology
chemical_list: D000911:Antibodies, Monoclonal; D018821:CD18 Antigens; D005456:Fluorescent Dyes; D018960:Hyaluronan Receptors; D016167:Integrin alphaXbeta2; D016169:Lymphocyte Function-Associated Antigen-1; D012235:Rhodamines; C058319:dihydrorhodamine 123; D013755:Tetradecanoylphorbol Acetate