Natural killer cell dysfunction in uremia: the role of oxidative stress and the effects of dialysis.

Abstract:

:Immune deficiency is one of the numerous consequences of chronic renal failure. We can hypothesize that an abnormal natural killer (NK) cell response is present in patients with end-stage renal disease (ESRD). To characterize the immune defect in ESRD patients, we performed a NK cell subset analysis in 66 patients with ESRD treated by hemodialysis or peritoneal dialysis. Compared with healthy blood donors, patients undergoing chronic dialysis showed a profound decrease in NKG2D(+) cells within both CD8(+) T cell (58 vs. 67%, p = 0.03) and NK cell (39 vs. 56%, p = 0.002) populations. We further studied NK cell subsets in 55 hemodialysis patients and 17 patients treated by peritoneal dialysis. As compared to healthy donors, all these patients had significantly decreased NKG2D-positive NK cells. Patients using PMMA membranes (BK-F) or Helixone-FX membranes had a smaller decrease in NKG2D-positive NK cells when compared to patients treated with Nephral membranes. The expression of MICA on the cell surface of monocytes, which is a marker of inflammation induced by cellular stress, was also lower in patients using BK-F membranes. In conclusion, these data suggest that a subpopulation of NK cells is decreased in patients with ESRD. This decrease is associated with high circulating levels of the HLA-related molecule MICA. The dialysis membrane can influence the modulation of both the phenotype of NK cells and MICA overexpression.

journal_name

Blood Purif

journal_title

Blood purification

authors

Peraldi MN,Berrou J,Métivier F,Toubert A

doi

10.1159/000350839

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

14-9

eissn

0253-5068

issn

1421-9735

pii

000350839

journal_volume

35 Suppl 2

pub_type

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