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Endotoxinaemia in sickle cell disease
1Department of Paediatrics, St Thomas's Hospital Medical School, London.
Clinical and Laboratory Haematology
|January 1, 1988
Summary
Endotoxemia, a bacterial toxin, may occur more often in children with sickle cell anemia who have impaired reticuloendothelial function. This suggests intestinal endotoxin absorption when immune function is low.
Area of Science:
- Hematology
- Immunology
- Pediatrics
Background:
- Sickle cell disease (SCD) encompasses sickle cell anemia (HbSS) and related hemoglobinopathies.
- Reticuloendothelial system (RES) dysfunction is a known complication of SCD.
- Endotoxemia, presence of bacterial endotoxins, is implicated in various inflammatory conditions.
Purpose of the Study:
- To investigate the prevalence of endotoxemia in children with SCD.
- To explore the association between RES function and endotoxemia in these patients.
Main Methods:
- Prospective study of 59 children with SCD (HbSS, HbSC, HbS-beta-thalassaemia).
- Chromogenic Limulus amoebocyte lysate assay used to detect circulating endotoxin.
- Reticuloendothelial function assessed by red cell pitting (≥2% pitted cells indicate dysfunction).
Main Results:
- Children with HbSS exhibited more severe disease markers than those with HbSC or HbS-beta-thalassaemia.
- Twenty-nine children with HbSS and RES dysfunction were identified.
- Three of these 29 children (10.3%) had detectable endotoxemia; all had HbSS.
- None of the 18 children with other sickle hemoglobinopathies and RES dysfunction showed endotoxemia.
Conclusions:
- Endotoxemia appears to be more prevalent in children with sickle cell anemia and compromised reticuloendothelial function.
- Findings support the hypothesis that impaired RES function facilitates intestinal endotoxin absorption.
- Further research is warranted to confirm the link between RES dysfunction, endotoxemia, and SCD severity.