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Related Experiment Video

Updated: Jul 18, 2026

Isolation and Analysis of Brain-sequestered Leukocytes from Plasmodium berghei ANKA-infected Mice

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Published on: January 2, 2013

Cytokines and malaria parasitemia.

J Jason¹, L K Archibald, O C Nwanyanwu

¹HIV Immunology and Diagnostics Branch, Centers for Disease Control and Prevention, U.S. Public Health Service, Atlanta, Georgia 30333, USA.

Clinical Immunology (Orlando, Fla.)

|July 24, 2001

Summary

Malaria severity in children may stem from a more proinflammatory immune response compared to adults. This study highlights the role of interleukin-10 (IL-10) in malaria and age-related immune differences.

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Area of Science:

Immunology
Infectious Diseases
Pediatrics

Background:

Cytokine balance is crucial in malaria presentation and severity.
Malaria is typically more severe in children, suggesting age-related differences in immunity.
The precise nature of anti-malarial immunity and its age-related variations remain unclear.

Purpose of the Study:

To compare serum and cell-specific cytokine profiles in malaria patients versus those with other illnesses and healthy controls.
To investigate age-related differences in cytokine responses between parasitemic children and adults.
To elucidate the role of specific cytokines, such as IL-10, IL-6, IL-4, and IL-8, in malaria.

Main Methods:

Flow cytometry was performed on peripheral blood mononuclear cells from hospitalized children, febrile adults, and healthy adults in Malawi.
Serum cytokine levels were assessed in a subset of participants.
Participants were categorized based on malaria parasitemia (Plasmodium falciparum) and clinical status.

Main Results:

Malaria patients exhibited higher serum interleukin-10 (IL-10) levels compared to other patients.
Malaria patients showed lower percentages of lymphocytes producing IL-6.
Parasitemic children had higher percentages of monocytes producing IL-8 compared to parasitemic adults.
Children, regardless of malaria status, displayed higher cellular proinflammatory type 1 parameters than adults.

Conclusions:

Interleukin-10 (IL-10) plays a significant role in malaria parasitemia, potentially acting as an immunoregulator.
The observed lack of an IL-4 response suggests IL-10's function is primarily immunoregulatory.
Children exhibit a more proinflammatory immune response to malaria than adults, which may explain the greater disease severity in pediatric populations.