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Does immunologic status predict peritonitis in children treated with CAPD?
N Aksu1, A Keskinoglu, H Erdogan
1Department of Pediatric Nephrology, SSK Tepecik Teaching Hospital, Yenisehir, Turkey.
Insights
Children on continuous ambulatory peritoneal dialysis (CAPD) exhibit altered immune cell levels, including higher CD4 and B lymphocytes and lower natural killer (NK) cells. This immunologic status can predict peritonitis development in pediatric CAPD patients.
Area of Science:
- Pediatric Nephrology
- Immunology
- Peritoneal Dialysis
Background:
- Peritonitis is a significant complication in children undergoing continuous ambulatory peritoneal dialysis (CAPD).
- Understanding the immunologic factors contributing to peritonitis risk in pediatric CAPD patients is crucial for proactive management.
Purpose of the Study:
- To investigate whether the immunologic status of children on CAPD can predict the development of peritonitis.
- To compare lymphocyte subpopulations between pediatric CAPD patients and healthy controls.
Main Methods:
- Flow cytometry was used to determine lymphocyte subpopulations (CD3, CD4, CD8, CD19, NK, IL-2R) in 21 pediatric CAPD patients and 12 healthy children.
- Statistical analysis, including Student's t-test, was employed to compare immune parameters between groups.
Main Results:
- CAPD patients showed significantly higher CD4, CD4/CD8 ratio, and B lymphocyte levels, and lower natural killer (NK) cell counts compared to controls.
- Pediatric CAPD patients with peritonitis exhibited elevated CD3, CD4, and CD19 levels and reduced NK cell activity compared to controls.
- Specific immune profile alterations in CAPD patients correlate with an increased susceptibility to infections like peritonitis.
Conclusions:
- The immunologic status of children on CAPD differs significantly from healthy children, potentially explaining their increased vulnerability to peritonitis.
- Assessing specific lymphocyte subpopulations may serve as a predictive marker for peritonitis development in pediatric CAPD patients.
Abstract:
The purpose of this study was to evaluate whether immunologic status could predict the development of peritonitis in children on continuous ambulatory peritoneal dialysis (CAPD). Twenty-one patients (12 boys, 9 girls) aged 10.1 +/- 4.32 years (range: 23 months to 14 years) were studied. The mean duration of CAPD treatment was 12.88 +/- 6.69 months (range: 2-22 months). Twelve healthy children (mean age 11.5 years) were selected as a control group. Lymphocyte subpopulations (CD3, CD4, CD8, CD19, NK, and IL-2R) were determined by double-color flow cytometry (Becton-Dickinson). Statistical evaluation was made by Student's t-test. CD4 (38.4 +/- 7.1% vs. 28.0 +/- 5.4%), CD4/CD8 ratio (1.30 +/- 0.4 vs. 0.96 +/- 0.3), and B lymphocyte (19.9 +/- 8.9% vs. 12.0 +/- 3.2%) levels were significantly higher in CAPD patients compared with controls. CAPD patients showed significantly lower natural killer (NK) cell values than controls (12.7 +/- 7.0% vs. 27.3 +/- 8.3%). Apart from CD19 values (21.9 +/- 10.4% vs. 12.0 +/- 3.2%) there were no significant differences between CAPD patients without infection and the control group in the laboratory parameters studied. On the other hand, CD3 (66.3 +/- 7.9% vs. 55.9 +/- 9.7%), CD4 (38.4 +/- 7.1% vs. 28.0 +/- 5.4%), and CD19 (6.3 +/- 3.3% vs. 12.0 +/- 3.2%) levels were significantly higher in CAPD patients with infection compared with the controls. CAPD patients with infection showed significantly lower NK activity (12.7 +/- 7.1% vs. 27.3 +/- 8.3%) than those in the control group. In conclusion, these results can explain the increased vulnerability to peritonitis in CAPD patients compared with healthy subjects. Additionally, immunologic status can predict the development of peritonitis in children treated with CAPD.