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Immune restoration in children after partial splenectomy
1Institute for Medical Immunology, Medical Faculty (Charité), Humboldt University, Berlin, Germany.
Insights
Partial splenectomy (PSE) in children may offer a better immune recovery than total splenectomy (SE). PSE patients showed restored B cell function within 1-2 years, unlike SE patients, suggesting PSE is a viable alternative for certain conditions.
Area of Science:
- Pediatric Surgery
- Immunology
- Autoimmune Diseases
Background:
- Splenectomy (SE) treats severe autoimmune diseases and hypersplenism but increases infection risk due to immune organ removal.
- Partial splenectomy (PSE) aims to preserve spleen function while treating these conditions.
- Understanding long-term immune recovery after SE versus PSE is crucial for pediatric patients.
Purpose of the Study:
- To compare immune parameters in children following partial splenectomy (PSE) versus total splenectomy (SE).
- To assess the long-term immunological consequences of spleen preservation versus removal in pediatric patients.
- To evaluate the potential of PSE as a safer therapeutic alternative.
Main Methods:
- Longitudinal analysis of immune parameters in children post-PSE and post-SE for over 6 years.
- In vitro assessment of lymphocyte IgG production in response to pokeweed mitogen.
- Quantification of HLA-class II positive cells to evaluate immune regulation.
Main Results:
- Lymphocyte IgG production recovery was observed in PSE patients within 1-2 years, but not consistently in SE patients even after 10 years.
- Elevated HLA-class II positive cells were detected post-PSE, indicating altered immune regulation, which normalized alongside improved B cell activity.
- SE patients showed persistent deficits in IgG production, highlighting long-term immune compromise.
Conclusions:
- Partial splenectomy (PSE) demonstrates a superior immune recovery profile compared to total splenectomy (SE) in children.
- PSE may be a therapeutically advantageous alternative, preserving immune function while addressing specific pediatric conditions.
- Further research should explore the long-term benefits and indications for PSE in pediatric autoimmune diseases and hypersplenism.
Abstract:
Splenectomy (SE) is recognized to be a therapeutical approach in treating children with severe autoimmune diseases (chronic idiopathic thrombocytopenia; hemolytic anemia) or hypersplenism because of portal hypertension. Nevertheless, removal of a main immune organ results in elevated infection risk for these patients. Partial splenectomy (PSE) was developed as a therapeutical compromise to retain immunologically active spleen tissue. Here, we document the analysis of immune parameters obtained from children after both partial and total splenectomy, which have been followed up for a period of more than 6 years: (i) Lymphocytes from both groups of patients failed to produce IgG in response to pokeweed mitogen in vitro. This was observed in 11/20 splenectomized patients even 10 years after operation, whereas in PSE patients a restoration of this parameter after 1-2 years was seen. (ii) In patients after PSE, but not in splenectomized persons, an elevated number of HLA-class II positive cells had been detected suggesting a different situation of immune regulation following this operation. However, in parallel with an improvement of B cell in vitro activity this parameter was found to achieve normal values. Our findings indicate that partial splenectomy may be a therapeutical alternative, if the therapeutic goal can be achieved by this procedure.