Effects of uraemia and dialysis modality on polymorphonuclear cell apoptosis and function

Effects of uraemia and dialysis modality on polymorphonuclear cell apoptosis and function

Author Sardenberg, Camila Autor UNIFESP Google Scholar
Suassuna, Paulo Autor UNIFESP Google Scholar
Andreoli, Maria Claudia Cruz Autor UNIFESP Google Scholar
Watanabe, Renato Autor UNIFESP Google Scholar
Dalboni, Maria Aparecida Autor UNIFESP Google Scholar
Manfredi, Sílvia Regina Autor UNIFESP Google Scholar
Santos, Oscar Pavão dos Autor UNIFESP Google Scholar
Kallas, Esper Georges Autor UNIFESP Google Scholar
Draibe, Sérgio Antônio Autor UNIFESP Google Scholar
Cendoroglo Neto, Miguel Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Abstract Background. Previous studies have reported that incubation of polymorphonuclear cells (PMN) in uraemic plasma or with different haemodialysis membranes and peritoneal dialysis solutions increases apoptosis in this cell type. in addition, PMN harvested from uraemic patients show a reduced ability to generate superoxide in response to stimuli as well as impaired phagocytosis, chemotaxis and degranulation. the aim of the current study was to investigate the effect of uraemia and dialysis modality on apoptosis and function in freshly harvested non-incubated PMN.Methods. Polymorphonuclear cells were harvested from 14 chronic haemodialysis (HD) patients, from 14 continuous peritoneal dialysis patients (CAPD), 28 chronic kidney disease (CKD), pre-dialysis patients and from 14 healthy subjects (Controls). in these in vivo experiments, PMN apoptosis was studied by means of flow cytometric analysis of annexin V binding to freshly isolated cells. Polymorphonuclear cell phagocytosis and production of reactive oxygen species by unstimulated or stimulated (S.aureus, fMLP, PMA) cells were also studied by flow cytometry using whole blood.Results. We observed increased PMN apoptosis in CKD patients. CAPD and HD patients displayed PMN apoptosis rates similar to controls. in the HD group, PMN exhibited decreased phagocytosis rates. in contrast, phagocytosis rates in PMN from CAPD were not significantly different from controls. in the CKD and HD groups, apoptosis was inversely correlated with respiratory burst activity and phagocytosis.Conclusion. Our results suggest that both uraemia and treatment modality may interfere with PMN apoptosis and function. Dialysis appears to normalize the increased PMN apoptosis rates observed in CKD patients.
Keywords apoptosis
immune dysfunction
polymorphonuclear cells
Language English
Date 2006-01-01
Published in Nephrology Dialysis Transplantation. Oxford: Oxford Univ Press, v. 21, n. 1, p. 160-165, 2006.
ISSN 0931-0509 (Sherpa/Romeo, impact factor)
Publisher Oxford Univ Press
Extent 160-165
Origin http://dx.doi.org/10.1093/ndt/gfi095
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000234436100031
URI http://repositorio.unifesp.br/handle/11600/28605

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