title: The effect of lidocaine on neutrophil CD11b/CD18 and endothelial ICAM-1 expression and IL-1beta concentrations induced by hypoxia-reoxygenation.
abstract: BACKGROUND
  Lidocaine has actions potentially of benefit during ischaemia-reperfusion. Neutrophils and endothelial cells have an important role in ischaemia-reperfusion injury.
  
  
  METHODS
  Isolated human neutrophil CD11b and CD18, and human umbilical vein endothelial cell (HUVEC) ICAM-1 expression and supernatant IL-1beta concentrations in response to hypoxia-reoxygenation were studied in the presence or absence of different concentrations of lidocaine (0.005, 0.05 and 0.5 mg mL(-1)). Adhesion molecule expression was quantified by flow cytometry and IL- 1beta concentrations by ELISA. Differences were assessed with analysis of variance and Student-Newman-Keuls as appropriate. Data are presented as mean+/-SD.
  
  
  RESULTS
  Exposure to hypoxia-reoxygenation increased neutrophil CD11b (94.33+/-40.65 vs. 34.32+/-6.83 mean channel fluorescence (MCF), P = 0.02), CD18 (109.84+/-35.44 vs. 59.05+/-6.71 MCF, P = 0.03) and endothelial ICAM-1 (146.62+/-16.78 vs. 47.29+/-9.85 MCF, P < 0.001) expression compared to normoxia. Neutrophil CD18 expression on exposure to hypoxia-reoxygenation was less in lidocaine (0.005 mg mL(-1)) treated cells compared to control (71.07+/-10.14 vs. 109.84+/-35.44 MCF, P = 0.03). Endothelial ICAM-1 expression on exposure to hypoxia-reoxygenation was less in lidocaine (0.005 mg mL(-1)) treated cells compared to control (133.25+/-16.05 vs. 146.62+/-16.78 MCF, P = 0.03). Hypoxia-reoxygenation increased HUVEC supernatant IL-1beta concentrations compared to normoxia (3.41+/-0.36 vs. 2.65+/-0.21 pg mL(-1), P = 0.02). Endothelial supernatant IL-1beta concentrations in lidocaine-treated HUVECs were similar to controls.
  
  
  CONCLUSIONS
  Lidocaine at clinically relevant concentrations decreased neutrophil CD18 and endothelial ICAM-1 expression but not endothelial IL-1beta concentrations.
authors.affiliation: Cork University Hospital, Academic Department of Surgery, Cork, Ireland. dweilan@hotmail.com
authors.forename: W
authors.initials: W
authors.lastname: Lan
authors.forename: D
authors.initials: D
authors.lastname: Harmon
authors.forename: J H
authors.initials: JH
authors.lastname: Wang
authors.forename: G
authors.initials: G
authors.lastname: Shorten
authors.forename: P
authors.initials: P
authors.lastname: Redmond
mesh_terms: D000704:Analysis of Variance; D000779:Anesthetics, Local / Q000494:pharmacology; D039481:CD11b Antigen / Q000187:drug effects* / Q000378:metabolism; D018821:CD18 Antigens / Q000187:drug effects* / Q000378:metabolism; D015687:Cell Hypoxia / Q000187:drug effects / Q000502:physiology; D002478:Cells, Cultured; D004305:Dose-Response Relationship, Drug; D042783:Endothelial Cells / Q000187:drug effects* / Q000378:metabolism; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods; D005434:Flow Cytometry / Q000379:methods; D006801:Humans; D018799:Intercellular Adhesion Molecule-1 / Q000187:drug effects* / Q000378:metabolism; D007375:Interleukin-1 / Q000378:metabolism; D053583:Interleukin-1beta; D008012:Lidocaine / Q000494:pharmacology*; D009504:Neutrophils / Q000187:drug effects* / Q000378:metabolism; D010446:Peptide Fragments / Q000187:drug effects* / Q000378:metabolism; D012016:Reference Values; D015424:Reperfusion / Q000379:methods; D015427:Reperfusion Injury / Q000378:metabolism; D014471:Umbilical Veins
chemical_list: D000779:Anesthetics, Local; D039481:CD11b Antigen; D018821:CD18 Antigens; D007375:Interleukin-1; D053583:Interleukin-1beta; D010446:Peptide Fragments; C052994:interleukin-1beta (163-171); D018799:Intercellular Adhesion Molecule-1; D008012:Lidocaine