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Interleukin-1 in malnutrition
Insights
Severe malnutrition in children with kwashiorkor and marasmus significantly reduces interleukin-1 production by monocytes. Macrophages also showed impaired function, suppressing cellular immunity.
Area of Science:
- Immunology
- Nutritional Science
- Pediatrics
Background:
- Malnutrition is a global health issue affecting immune system development.
- Impaired cellular immunity is a known complication of severe childhood malnutrition.
Purpose of the Study:
- To investigate the impact of kwashiorkor and marasmus on monocyte-derived interleukin-1 production.
- To assess macrophage function and its role in cellular immunity suppression in malnourished children.
Main Methods:
- Monocytes were isolated from children with kwashiorkor, marasmus, and healthy controls.
- Interleukin-1 production was measured in vitro following lipopolysaccharide stimulation.
- Macrophage-mediated suppression of mouse thymocyte proliferation was assessed.
Main Results:
- Children with severe malnutrition exhibited significantly lower interleukin-1 activity.
- Macrophages from children with kwashiorkor produced suppressive factors.
- These findings indicate impaired macrophage function in severe malnutrition.
Conclusions:
- Severe malnutrition, specifically kwashiorkor and marasmus, impairs macrophage function.
- Reduced interleukin-1 production and suppressive factors contribute to the compromised cellular immunity observed in malnourished children.
Abstract:
The effect of malnutrition on the in vitro production of interleukin-1 by lipopolysaccharide stimulated circulating monocytes has been investigated in children suffering from kwashiorkor and marasmus. The interleukin-1 activity was significantly lower in children with severe malnutrition. Furthermore, macrophages from children with kwashiorkor produced factors that suppressed mouse thymocyte proliferation. These observations show a significant impairment of macrophage function and provide a mechanism for the suppression of cellular immunity in malnutrition.