NDT Advance Access published online on August 2, 2005
Nephrology Dialysis Transplantation, doi:10.1093/ndt/gfi048
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1 Division of Nephrology, Tokyo Metropolitan Komagome Hospital, Tokyo, Japan
* To whom correspondence should be addressed. Background. Most crucial in the initial stages of host defence against invading micro-organisms is innate immunity, in which peripheral mononuclear cells, in particular cytokines, are pivotal. Mortality from infections is high in dialysis patients, but it remains unclear if this arises from the ineffectiveness of innate immune mechanisms. Methods. In 20 haemodialysis (HD) patients, 20 patients on continuous ambulatory peritoneal dialysis (CAPD), and 15 age-matched controls, we studied cytokine production by monocytes and helper T-cells in response to in vitro stimuli. The most important early-response cytokines for innate immunity, tumour necrosis factor (TNF)- Results. CAPD patients showed significantly reduced synthesis of TNF- Conclusions. Circulating immune cells in CAPD patients may be hyporeactive against infections, indicating an unfavourable innate host defence.
Received December 17, 2004
Accepted June 8, 2005
Original Articles
Impairment of innate cellular response to in vitro stimuli in patients on continuous ambulatory peritoneal dialysis
2 Department of Medicine, Kidney Center, Tokyo Women's Medical University, Tokyo, Japan
Minoru Ando, E-mail: nephrol{at}cick.jp
Abstract 
and interleukin (IL)-1
, were tested in monocytes, and interferon-
and IL-4 were studied as indicators of polarization of helper T-cells into type 1 and type 2 cells. Peripheral blood cells stimulated with lipopolysaccharide or mitogen were labelled with anti-CD14+ and -CD4+ antibodies and then subjected to intracellular cytokine staining and flow cytometry. and IL-1 and inhibited T helper phenotype development compared with HD patients and control subjects. In contrast, HD patients showed an unaltered monokine response and a marked polarization of helper T-cells towards the type 1 phenotype. We also found that a single HD treatment potentiated monocytes to synthesize TNF-.; intracellular cytokine; monocyte; TNF-.
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