Related Experiment Videos
Intraperitoneal secretion of interleukin-6 during continuous ambulatory peritoneal dialysis
M Goldman1, P Vandenabeele, J Moulart
1Department of Nephrology, Hôpital Erasme, Université Libre de Bruxelles, Belgium.
Insights
Interleukin-6 (IL-6) is secreted within the peritoneal dialysis fluid (PDE) during chronic ambulatory peritoneal dialysis (CAPD). IL-6 levels significantly increase during peritonitis but return to normal after antibiotic treatment.
Area of Science:
- Nephrology
- Immunology
- Biochemistry
Background:
- Chronic ambulatory peritoneal dialysis (CAPD) is a common renal replacement therapy.
- Peritonitis is a serious complication of CAPD, requiring prompt diagnosis and treatment.
- Interleukin-6 (IL-6) is a pro-inflammatory cytokine implicated in various inflammatory conditions.
Purpose of the Study:
- To investigate the levels of Interleukin-6 (IL-6) in serum and peritoneal dialysis effluent (PDE) of patients undergoing CAPD.
- To determine the role of IL-6 in the context of CAPD-associated peritonitis.
Main Methods:
- IL-6 was quantified using a biological assay measuring the proliferation of the IL-6-dependent 7TD1 cell line.
- Measurements were performed on serum and PDE samples from CAPD patients.
- Patient groups included those without peritonitis and those with staphylococcal peritonitis.
Main Results:
- Patients without peritonitis showed low but significant IL-6 levels in PDE; serum IL-6 was undetectable.
- Patients with staphylococcal peritonitis exhibited markedly elevated IL-6 levels in PDE (5,832–37,491 pg/ml).
- Serum IL-6 remained low or undetectable during peritonitis, except in one patient. IL-6 levels in PDE normalized after 5 days of antibiotic treatment.
Conclusions:
- CAPD is associated with the intraperitoneal secretion of IL-6.
- Peritonitis episodes during CAPD lead to a significant and transient increase in intra-peritoneal IL-6 levels.
- IL-6 may serve as a biomarker for peritoneal inflammation in CAPD patients.
Abstract:
Interleukin-6 (IL-6) was determined in serum and peritoneal dialysis effluent (PDE) of patients on chronic ambulatory peritoneal dialysis (CAPD) by a biological assay measuring the proliferation of the IL-6-dependent 7TD1 cell line. Six patients free of peritonitis displayed low but significant levels of IL-6 (mean +/- 42 pg/ml) in PDE, while IL-6 was undetectable in serum. In 6 patients with staphylococcal peritonitis, a tremendous increase in PDE levels of IL-6 was noted (range: 5,832-37,491 pg/ml), while serum IL-6 remained either undetectable or on a low level except in one case. After 5 days of antibiotic treatment, IL-6 levels in PDE returned to basal values. We conclude that CAPD results in an intraperitoneal secretion of IL-6 which is markedly but transiently increased during peritonitis episodes.