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Cellular immunity and T-lymphocyte subsets in young children with acute measles
Insights
Measles significantly decreases helper T-cells in young children, lowering the helper/suppressor ratio. Malnutrition may worsen this immune response during acute measles infection.
Area of Science:
- Immunology
- Pediatrics
- Infectious Diseases
Background:
- Measles is a highly contagious viral illness.
- T-cell subsets play a crucial role in adaptive immunity.
- Nutritional status can significantly impact immune function.
Purpose of the Study:
- To investigate T-cell subset dynamics during acute symptomatic measles in young children.
- To compare immune responses between malnourished and well-nourished children with measles.
Main Methods:
- Analysis of T-cell subsets (helper/inducer and suppressor/cytotoxic) in hospitalized children.
- Assessment of lymphocyte counts and response to mitogens.
- Comparison between malnourished and well-nourished patient groups.
Main Results:
- A significant decrease in total lymphocyte count, primarily due to reduced helper/inducer T-cells.
- A significant decrease in the helper/suppressor T-cell ratio during acute measles.
- Impaired lymphocyte response to common mitogens (PHA, Con A, PWM).
- Malnourished children showed a trend towards greater T-cell depression compared to well-nourished children.
Conclusions:
- Acute measles significantly alters T-cell subset balance, impacting immune function in young children.
- Nutritional status may exacerbate measles-induced immune suppression.
- Further research is needed to understand long-term implications and potential interventions.
Abstract:
The changes occurring in the T-cell subsets during acute symptomatic measles were examined in ten malnourished and 18 well nourished hospitalized children younger than 5 years of age (median age 14 months). A significant decrease in total lymphocyte count was observed, which was due mainly to a decrease in helper/inducer T lymphocytes, whereas the suppressor/cytotoxic T-lymphocyte subset remained unchanged. Consequently, helper/suppressor ratio decreased significantly during the acute phase of the disease. A reduced response to mitogens (PHA, Con A, PWM) was also observed. Malnourished infants showed a trend toward a deeper depression in both helper and suppressor T cells during the acute phase than well nourished children, whereas the helper/suppressor ratio remained similar in the two groups.