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IgG2 deficiency in young children treated with continuous ambulatory peritoneal dialysis (CAPD)
C H Schröder1, J A Bakkeren, C M Weemaes
1Department of Pediatrics, St. Radboud Hospital, University of Nijmegen, The Netherlands.
Insights
Continuous ambulatory peritoneal dialysis (CAPD) in children may lead to immunoglobulin G2 (IgG2) deficiency due to excessive IgG loss. This finding helps explain higher peritonitis rates in pediatric CAPD patients.
Area of Science:
- Pediatric Nephrology
- Immunology
- Renal Replacement Therapy
Background:
- Children undergoing continuous ambulatory peritoneal dialysis (CAPD) exhibit higher peritonitis rates than adults, a disparity lacking clear explanation.
- Understanding the immunological consequences of CAPD in pediatric patients is crucial for optimizing treatment and reducing complications.
Purpose of the Study:
- To investigate serum immunoglobulin levels, including IgG subclasses, in children treated with CAPD.
- To determine if CAPD contributes to specific immunoglobulin deficiencies in pediatric patients.
Main Methods:
- Serum samples from 12 young CAPD patients were analyzed for IgA, IgM, IgG, and IgG subclasses.
- Control groups included children pre-CAPD, children on hemodialysis, and adult CAPD patients.
Main Results:
- Eleven out of 12 pediatric CAPD patients showed undetectable IgG2 levels.
- A slight decrease in total IgG was observed in these pediatric patients.
- Control groups did not exhibit similar immunoglobulin abnormalities.
Conclusions:
- Continuous ambulatory peritoneal dialysis (CAPD) in young patients results in significant IgG loss, leading to a deficiency in IgG2.
- This IgG2 deficiency may be a contributing factor to the increased incidence of peritonitis observed in children on CAPD.
Abstract:
In most series of children treated with continuous ambulatory peritoneal dialysis (CAPD), the incidence of peritonitis is higher than in adults. This phenomenon has been insufficiently explained. In the serum of 12 young children treated with CAPD, the serum immunoglobulins IgA, IgM, and IgG, as well as the IgG subclasses, were evaluated. In 11 of them, IgG2 was not detectable. Total IgG was also slightly decreased in these patients. In control groups, consisting of children before CAPD was started, children treated with hemodialysis, and adult CAPD patients, no clear abnormalities were found. It is concluded that in young patients peritoneal dialysis causes IgG loss leading to IgG2 deficiency.