title: Interleukin-8 during peritonitis in patients treated with CAPD; an in-vivo model of acute inflammation.
abstract: CAPD-related peritonitis was used as an in-vivo model to study Il-8 during peritoneal inflammation. Eleven episodes were studied in nine patients, who were followed on 8 consecutive days from the start of peritonitis and once after recovery (control). Il-8 was measured in dialysate (night dwells) and serum. The Il-8 time course was compared to Il-6 and TNF alpha. In addition, an in-vivo relationship between dialysate Il-8 and intraperitoneal accumulation of neutrophils was studied. A highly increased peritoneal appearance rate of Il-8 was found in the acute phase that decreased to control values during recovery. A remarkable parallelism was observed for dialysate Il-8 and Il-6 with respect to the time course and the peritoneal appearance rate. In contrast, the appearance rate of TNF alpha was much less and had a different time course. In three of four cases where the dialysate Il-8 peak occurred on day 2, the dialysate Il-6 peak still coincided with Il-8, in contrast to TNF alpha (always day 1). Dialysate Il-8 generally exceeded serum concentrations during the entire follow-up, indicating intraperitoneal Il-8 synthesis. A positive correlation was present between the dialysate Il-8 peak and the maximal number of neutrophils in dialysate. This relationship was absent for Il-6 and TNF alpha. In five of six episodes where neutrophils were quantified on both day 1 and 2, the Il-8 peak occurred simultaneously with the neutrophil peak. These findings suggest that Il-8 is involved in the recruitment of neutrophils towards the dialysate during peritonitis.
authors.affiliation: Renal Unit, Academic Medical Center, Amsterdam, The Netherlands.
authors.forename: D
authors.initials: D
authors.lastname: Zemel
authors.forename: R T
authors.initials: RT
authors.lastname: Krediet
authors.forename: G C
authors.initials: GC
authors.lastname: Koomen
authors.forename: W M
authors.initials: WM
authors.lastname: Kortekaas
authors.forename: H G
authors.initials: HG
authors.lastname: Geertzen
authors.forename: R J
authors.initials: RJ
authors.lastname: ten Berge
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D001202:Ascitic Fluid / Q000276:immunology / Q000473:pathology; D005260:Female; D006801:Humans; D007249:Inflammation / Q000209:etiology / Q000276:immunology / Q000473:pathology; D015850:Interleukin-6 / Q000097:blood / Q000378:metabolism; D016209:Interleukin-8 / Q000097:blood / Q000378:metabolism*; D007674:Kidney Diseases / Q000628:therapy; D007962:Leukocytes / Q000276:immunology / Q000473:pathology; D008297:Male; D008875:Middle Aged; D008954:Models, Biological; D009504:Neutrophils / Q000276:immunology; D010529:Peritoneal Cavity / Q000473:pathology / Q000502:physiology; D010531:Peritoneal Dialysis, Continuous Ambulatory / Q000009:adverse effects*; D010538:Peritonitis / Q000209:etiology / Q000276:immunology* / Q000473:pathology; D013997:Time Factors; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism
chemical_list: D015850:Interleukin-6; D016209:Interleukin-8; D014409:Tumor Necrosis Factor-alpha