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T lymphocyte subpopulations in anorexia nervosa and refeeding
A Mustafa1, A Ward, J Treasure
1Department of Immunology, King's College School of Medicine and Dentistry, London, United Kingdom.
Clinical Immunology and Immunopathology
|March 1, 1997
Summary
Starvation in anorexia nervosa significantly reduces memory CD8 T cells, a key immune component. Refeeding shows a potential for recovery, suggesting a link between nutrition and immune cell restoration.
Area of Science:
- Immunology
- Nutritional Science
- Cell Biology
Background:
- Anorexia nervosa (AN) is characterized by severe malnutrition, impacting overall health.
- Immune function and lymphocyte subset changes during starvation are studied, but AN-specific immune parameters are less understood.
Purpose of the Study:
- To investigate T cell function and activation markers in patients with anorexia nervosa.
- To assess changes in lymphocyte subsets, particularly CD8+ T cells, before and after refeeding.
Main Methods:
- Phenotypic markers of T cell function and activation were analyzed.
- 20 severely underweight patients with anorexia nervosa were studied.
- Samples were collected before and after a refeeding period.
Main Results:
- A significant reduction in the percentage and absolute number of CD8+ T cells was observed in AN patients.
- This reduction was primarily due to a decrease in memory CD8 (CD45RO+RA-) T cells.
- A trend towards recovery of memory CD8 T cells was noted after refeeding; subtle abnormalities in activated CD4 and CD8 cells were also found.
Conclusions:
- Starvation in anorexia nervosa leads to substantial alterations in memory CD8 T cells.
- The findings suggest that nutritional status critically influences T cell populations.
- Restoration of weight may be associated with the recovery of specific immune cell subsets and potentially reduced susceptibility to infections.