title: Phagocytosis in uremic and hemodialysis patients: a prospective and cross sectional study.
abstract: Leukocyte response to phagocytic challenge was assessed in uremic and hemodialysis patients in a prospective and cross sectional study. Using latex, zymosan and staphylococcus as phagocytic challenge, the utilization of glucose-I-C14 and the generation of reactive oxygen species was measured in these patients. In uremic, non-dialysis dependent patients, the response to phagocytosis was significantly reduced when creatinine exceeded 6 mg/dl and prior to initiation of dialysis (mean serum creatinine 9.3 +/- 0.3 mg/dl) was less than half that of patients with normal renal function (P less than 0.01). In a prospective study of 15 patients initiated on dialysis, the metabolic response of their leukocytes was assessed sequentially. In eight patients, initiation of dialysis with cuprophane (Cu) membrane lead to a further decline (60%) in their metabolic response to phagocytosis at the end of four weeks of dialysis compared to pre-initiation of dialysis (P less than 0.01), whereas in seven other patients, dialysis with non-complement activating membranes did not result in a significant decline. Prospective cross-over studies of chronic hemodialysis patients corroborated these findings; eight patients dialyzed with new CU membranes had a significant decline of their metabolic response to phagocytic challenge acutely at the end of each dialysis and in pre-dialysis samples after two weeks of Cu dialysis, whereas their response returned back to baseline after two weeks of dialysis with non-complement activating membrane. In prospective and cross sectional studies, a decreased response to phagocytic stimulus was a predictor of hospitalization, primarily for infectious reasons.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Division of Nephrology, University Hospital, Ghent, Belgium.
authors.forename: R
authors.initials: R
authors.lastname: Vanholder
authors.forename: S
authors.initials: S
authors.lastname: Ringoir
authors.forename: A
authors.initials: A
authors.lastname: Dhondt
authors.forename: R
authors.initials: R
authors.lastname: Hakim
mesh_terms: D002482:Cellulose / Q000031:analogs & derivatives*; D003430:Cross-Sectional Studies; D005609:Free Radicals; D005947:Glucose / Q000378:metabolism; D006801:Humans; D008213:Lymphocyte Activation / Q000276:immunology; D008567:Membranes, Artificial; D009504:Neutrophils / Q000276:immunology* / Q000378:metabolism; D010587:Phagocytosis / Q000276:immunology*; D011446:Prospective Studies; D006435:Renal Dialysis; D014511:Uremia / Q000453:epidemiology / Q000276:immunology* / Q000628:therapy
chemical_list: D005609:Free Radicals; D008567:Membranes, Artificial; D002482:Cellulose; C009865:cuprammonium cellulose; D005947:Glucose