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Plasma free iron: a possible cause of oedema in kwashiorkor
A A Sive1, W S Dempster, H Malan
1Department of Paediatrics and Child Health, University of Cape Town, Rondebosch, South Africa.
Insights
Free iron in the blood may cause kwashiorkor edema. Measuring bleomycin detectable iron (BDI) and reducing it could improve patient outcomes and survival rates.
Area of Science:
- Nutritional Biochemistry
- Pediatric Medicine
- Clinical Pathology
Background:
- Edema is a key diagnostic sign of kwashiorkor, but its underlying mechanisms are not fully understood.
- The role of iron in the pathogenesis of kwashiorkor edema requires further elucidation.
Purpose of the Study:
- To investigate the relationship between plasma 'free' iron levels and the severity of edema in children with kwashiorkor.
- To assess the correlation between bleomycin detectable iron (BDI) and plasma albumin concentration in these patients.
Main Methods:
- Study conducted at a university teaching hospital.
- Included fifteen pediatric patients diagnosed with kwashiorkor, categorized by edema severity (9 severe, 6 moderate).
- Plasma 'free' iron was quantified using bleomycin detectable iron (BDI) assay.
Main Results:
- Patients with severe edema exhibited significantly higher BDI levels compared to those with moderate edema (20.5 vs. 6.75 mumol/l).
- Plasma albumin concentrations were comparable between the severe and moderate edema groups.
- BDI was undetectable in all patients within 30 days of admission.
Conclusions:
- Elevated levels of circulating 'free' iron may play a role in the development of edema in kwashiorkor.
- Sequestration of 'free' iron could potentially accelerate recovery and reduce mortality and morbidity in kwashiorkor patients.
Background:
Oedema is a sine qua non for the diagnosis of kwashiorkor yet the mechanisms leading to oedema remain ill defined.
Aims:
To relate the plasma concentration of radical promoting 'free' iron to the degree of oedema in patients with kwashiorkor.
Setting:
University teaching hospital.
Patients:
Fifteen children with kwashiorkor, nine of whom had severe and six of whom had a moderate degree of oedema.
Methods:
Plasma 'free' iron was measured as bleomycin detectable iron (BDI) and related to severity of oedema and plasma albumin concentration.
Results:
BDI was significantly higher in the patients with severe oedema (20.5 v 6.75 mumol/l) whereas the albumin concentrations were similar (16 v 17 g/l). BDI was no longer present in any patients 30 days after admission.
Conclusions:
'Free' circulating iron may contribute to the oedema of kwashiorkor, and its sequestration could hasten recovery and decrease morbidity and mortality.
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