title: Phagocytic and oxidative burst activity of neutrophils in patients with spinal cord injury.
abstract: OBJECTIVE
  To evaluate phagocytic activity and neutrophil oxidative burst functions in patients with spinal cord injury (SCI) because alterations in neutrophil metabolic activity can be one of the causes of immune mechanism damage contributing to repeated bacterial infections.
  
  
  METHODS
  A controlled and cross-sectional study.
  
  
  METHODS
  Departments of physical medicine and rehabilitation and immunology.
  
  
  METHODS
  Patients with SCI (N=34) and 28 healthy controls.
  
  
  METHODS
  Phagocytosis and oxidative burst in whole-blood neutrophils were assessed by flow cytometry. The percentage of phagocytizing cells after in vitro incubation with Escherichia coli, phagocytic activity (mean intensity of fluorescence [MIF]) and the percentage of neutrophiloxidative burst, and the MIF value of the production of reactive oxygen intermediates (ROIs) were analyzed. In addition, clinical assessment including the level of injury, American Spinal Injury Association scores, and functional status were carried out.
  
  
  METHODS
  Not applicable.
  
  
  RESULTS
  Although the percentage of E. coli phagocytizing neutrophils was not different between groups, the MIF value of absorbed E. coli was significantly lower in patients with SCI than in controls (P<.05). The MIF value of ROI production by neutrophils with both stimulator of phorbol 12-myristate 13-acetate and E. coli was significantly higher in patients with SCI (P<.05).
  
  
  CONCLUSIONS
  In patients with SCI, decreased phagocytic activity of neutrophils may be a result of a regulatory mechanism to minimize the deleterious effects of increased neutrophil burst activity.
authors.affiliation: Department of Physical Medicine and Rehabilitation, University of Ege, Izmir, Turkey.
authors.forename: Selcen
authors.initials: S
authors.lastname: Kanyilmaz
authors.forename: Simin
authors.initials: S
authors.lastname: Hepguler
authors.forename: Funda C
authors.initials: FC
authors.lastname: Atamaz
authors.forename: Nihal M
authors.initials: NM
authors.lastname: Gokmen
authors.forename: Omur
authors.initials: O
authors.lastname: Ardeniz
authors.forename: Aytul
authors.initials: A
authors.lastname: Sin
mesh_terms: D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D003430:Cross-Sectional Studies; D004926:Escherichia coli; D005260:Female; D005434:Flow Cytometry; D006801:Humans; D008297:Male; D008875:Middle Aged; D009504:Neutrophils / Q000276:immunology* / Q000378:metabolism*; D010587:Phagocytosis; D017382:Reactive Oxygen Species / Q000378:metabolism; D016897:Respiratory Burst; D013119:Spinal Cord Injuries / Q000276:immunology* / Q000378:metabolism; D055815:Young Adult
chemical_list: D017382:Reactive Oxygen Species