title: Monocyte and neutrophil chemotactic activity at the site of interstitial inflammation in patients on high-flux hemodialysis or hemodiafiltration.
abstract: OBJECTIVE
  We have observed a difference between patients on low-flux hemodialysis (HD) or peritoneal dialysis and patients on hemodiafiltration (HDF) or high-flux HD in the capacity of transmigrated leukocytes to mobilize CD11b in response to inflammatory stimuli compared with healthy subjects. This could be due to different interstitial chemokine concentrations.
  
  
  METHODS
  We measured concentrations of circulating and interstitial macrophage inflammatory protein-1 alpha (MIP-1 alpha), matrix metalloproteinase-9 (MMP-9)/neutrophil gelatinase-associated lipocalin (NGAL), monocyte chemoattractant protein-1 (MCP-1) and interleukin-8 (IL-8) in 10 patients on HDF or high-flux HD and 11 healthy subjects by using immunoassay.
  
  
  RESULTS
  The interstitial concentrations of MIP-1 alpha, MMP-9/NGAL and IL-8 were similar in patients and healthy subjects, while the corresponding concentration of MCP-1 was significantly higher in patients on HDF or high-flux HD as compared with healthy subjects (p < 0.01).
  
  
  CONCLUSIONS
  We suggest that an equal or higher concentration of chemokines in the interstitium in patients with HDF or high-flux HD might be one mechanism responsible for the preserved function of transmigrated leukocytes.
authors.affiliation: Department of Nephrology, Malmö University Hospital, Malmö, Sweden. jenny.k.olsson@gmail.com
authors.forename: Jenny
authors.initials: J
authors.lastname: Olsson
authors.forename: Josefin
authors.initials: J
authors.lastname: Paulsson
authors.forename: Elham
authors.initials: E
authors.lastname: Dadfar
authors.forename: Joachim
authors.initials: J
authors.lastname: Lundahl
authors.forename: Ali
authors.initials: A
authors.lastname: Moshfegh
authors.forename: Stefan H
authors.initials: SH
authors.lastname: Jacobson