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Increased protein loss during peritonitis associated with peritoneal dialysis is neutrophil dependent.

Abstract：

BACKGROUND:Peritonitis in peritoneal dialysis patients is accompanied by an enhanced migration of neutrophils (PMNs) and increased protein loss into the peritoneal cavity; however, the role of PMNs in governing increased protein loss during peritonitis associated with peritoneal dialysis is unknown. METHODS:We determined the importance of PMNs in governing changes in peritoneal permeability to protein in New Zealand White rabbits in which acute peritonitis was induced by adding 4 x 106 colony-forming units of Escherichia coli to 35 mL/kg of 0.9% saline dialysate. The total leukocyte and PMN migration into the peritoneal cavity was assessed by differential cell counts in the dialysate, and peritoneal permeability to protein was evaluated by calculating the dialysate to plasma concentration ratio for total protein as a function of time during a six- or eight-hour dwell. In series 1 experiments, leukocytes were depleted from the rabbit circulation by an intravenous injection of mustine (1.2 mg/kg) three days before the experiment; in series 2 experiments, integrin-dependent PMN migration into the peritoneal cavity was inhibited by an intravenous injection of monoclonal antibody (mAb) 60.3 (2 mg/kg) directed against the integrin CD18 on leukocytes five minutes before the experiment. RESULTS:In series 1 experiments, mustine decreased circulating leukocytes by 82 +/- 5% (mean +/- SEM) and circulating PMNs by 93 +/- 3%. Total leukocyte and PMN migration into the peritoneal cavity and peritoneal permeability to protein were decreased in mustine-treated rabbits after exposure to E. coli in the dialysate to levels similar to those found in rabbits without bacterial peritonitis. In series 2 experiments, an intravenous injection of anti-CD18 antibody also abrogated both the enhanced PMN migration into the peritoneal cavity and the increased peritoneal permeability to protein after exposure to E. coli in the dialysate. CONCLUSIONS:PMN migration into the peritoneal cavity is integrin dependent. Increased protein loss during acute, gram-negative bacterial peritonitis in a rabbit model of peritoneal dialysis is PMN dependent.

journal_name

Kidney Int

journal_title

Kidney international

authors

Luo Q,Cheung AK,Kamerath CD,Reimer LG,Leypoldt JK

doi

10.1046/j.1523-1755.2000.00019.x

subject

Has Abstract

pub_date

2000-04-01 00:00:00

pages

1736-42

issue

4

eissn

0085-2538

issn

1523-1755

pii

S0085-2538(15)46924-8

journal_volume

57

pub_type

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