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Hypogammaglobulinemia in children undergoing continuous ambulatory peritoneal dialysis
1Department of Pediatrics, John Hopkins University School of Medicine, Baltimore, MD 21205.
Insights
Children on continuous ambulatory peritoneal dialysis (CAPD) often experience low immunoglobulin levels due to protein loss. However, these children maintained protective antibody responses to immunizations.
Area of Science:
- Pediatric Nephrology
- Immunology
- Renal Replacement Therapy
Background:
- Continuous ambulatory peritoneal dialysis (CAPD) is a treatment for kidney failure in children.
- Humoral immunity and immunoglobulin levels are crucial for immune defense.
- Protein loss through the peritoneal membrane can affect nutritional and immune status.
Purpose of the Study:
- To evaluate humoral immunity in children undergoing CAPD.
- To assess immunoglobulin levels and antibody responses in this pediatric population.
Main Methods:
- Assessed serum immunoglobulin levels in seven children on CAPD.
- Quantified immunoglobulin G (IgG) loss in peritoneal dialysis effluents.
- Evaluated antibody responses to immunization in the study cohort.
Main Results:
- 71% of children had hypogammaglobulinemia (low immunoglobulin levels).
- Significant daily IgG loss occurred via the peritoneal membrane, increasing with CAPD duration.
- Despite low immunoglobulin levels, all children demonstrated protective antibody responses to immunizations.
Conclusions:
- CAPD is associated with hypogammaglobulinemia in children due to peritoneal protein loss.
- The peritoneal membrane facilitates significant IgG loss, impacting humoral immunity.
- Children on CAPD can mount adequate antibody responses to vaccines despite hypogammaglobulinemia.
Abstract:
Humoral immunity was evaluated in seven children undergoing continuous ambulatory peritoneal dialysis (CAPD). Five children (71%) had serum immunoglobulin levels which were more than 2 SD below the mean for age. One mechanism contributing to hypogammaglobulinemia was loss via the peritoneal membrane. Daily losses of IgG into peritoneal dialysis effluents represented 7%-29% of normal daily IgG synthesis, and losses increased with duration of CAPD therapy. Despite the observed hypogammaglobulinemia, all children had protective antibody responses to immunization.