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Cytokine profiles at birth predict malaria severity during infancy
Edward Kabyemela1, Bronner P Gonçalves, D Rebecca Prevots
1MOMS Project, Seattle Biomedical Research Institute, Seattle, Washington, United States of America, and Muheza Designated District Hospital, Muheza, Tanzania.
Plos One
|October 17, 2013
Summary
Cytokine profiles at birth, specifically Interleukin-1 beta (IL-1β), can predict malaria risk. Higher IL-1β levels at birth are linked to lower parasite density and reduced severe malaria in children.
Area of Science:
- Immunology
- Infectious Diseases
- Pediatrics
Background:
- Severe malaria risk exhibits significant inter-individual variability, with much of this unexplained.
- Early life immune responses may play a crucial role in determining long-term susceptibility to malaria.
Purpose of the Study:
- To investigate if cytokine profiles measured at birth predict malaria parasite density and disease severity in early childhood.
- To examine the persistence of cytokine levels from birth into early childhood.
Main Methods:
- A birth cohort study in Muheza, Tanzania (N=783) measured cytokine levels (including IL-1β, TNF-α) in cord blood at birth and peripheral blood during follow-up.
- Children received regular clinical and blood smear assessments for malaria parasite density and severe disease events.
Main Results:
- Cord blood cytokine levels were positively correlated. IL-1β and TNF-α cord levels correlated with early childhood levels.
- Higher cord blood IL-1β levels were associated with approximately 40% lower malaria parasite densities.
- Elevated cord IL-1β levels significantly decreased the risk of severe malaria (aHR 0.60).
Conclusions:
- Interleukin-1 beta (IL-1β) levels at birth are a significant predictor of both future IL-1β levels and severe malaria risk.
- The protective effect of IL-1β against severe malaria may be mediated by its role in controlling parasite density through inflammatory responses.
