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T and B lymphocyte rosetting in undernourished children
Summary
Children with malnutrition, including kwashiorkor and marasmus, show reduced T cell values. Immune responses to DNCB sensitization improved significantly after nutritional rehabilitation.
Area of Science:
- Immunology
- Pediatric Nutrition
- Cellular Immunology
Background:
- Malnutrition, particularly kwashiorkor and marasmus, significantly impacts immune function in children.
- Lymphocyte subpopulations, including T cells, play a critical role in cellular immunity and are often affected by nutritional status.
Purpose of the Study:
- To assess T and B lymphocyte rosetting values in children with different forms of malnutrition.
- To evaluate the impact of nutritional status and refeeding on cellular immune response, specifically delayed-type hypersensitivity (DTH) to 2,4-dinitrochlorobenzene (DNCB).
Main Methods:
- Obtained T and B lymphocyte rosetting values from 18 children diagnosed with kwashiorkor, marasmus, or nutritional edema.
- Assessed DTH responses to 2,4-dinitrochlorobenzene (DNCB) sensitization in malnourished children before and after nutritional refeeding.
Main Results:
- Subnormal T cell values were observed across all malnutrition classes, with the lowest levels in children with kwashiorkor.
- Four out of five malnourished children failed to respond to DNCB challenges when sensitized before refeeding.
- Five out of six children demonstrated a strong DTH response to DNCB when sensitized after nutritional refeeding.
Conclusions:
- Nutritional deficiencies in children are associated with impaired T cell function.
- Nutritional rehabilitation is crucial for restoring cellular immune competence, as evidenced by improved DTH responses to DNCB sensitization after refeeding.