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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
immunology and microbiology
Distinct Th1- and Th2-type prenatal cytokine responses to Plasmodium falciparum erythrocyte invasion ligands
Infection and Immunity, Volume 73, No. 6, Year 2005
Notification
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Description
Prenatal immunity to Plasmodium falciparum merozoite proteins involved in erythrocyte invasion may contribute to the partial protection against malaria that is acquired during infancy in areas of stable malaria transmission. We examined newborn and maternal cytokine and antibody responses to merozoite surface protein-1 (MSP-1), ribosomal phosphoprotein P0 (PfP0), and region II of erythrocyte binding antigen-175 (EBA-175) in infant-mother pairs in Kenya. Overall, 82 of 167 (50%), 106 of 176 (60%), and 38 of 84 (45%) cord blood lymphocytes (CBL) from newborns produced one or more cytokines in response to MSP-1, PfP0, and EBA-175, respectively. Newborns of primigravid and/or malaria-infected women were more likely to have antigen-responsive CBL than were newborns of multigravid and/or uninfected women at delivery. Newborn cytokine responses did not match those of their mothers and fell into three distinct categories, Th1 (21 of 55 CBL donors produced only gamma Interferon and/or interleukin 2 [IL-2]), Th2 (21 of 55 produced only IL-5 and/or IL-13), and mixed Th1/Th2 (13 of 55). Newborns produced more IL-10 than adults. High and low levels of cord blood IL-12 p70 production induced by anti-CD40 activation were associated with malaria-specific Th1 and Th2 responses, respectively. Antigen-responsive CBL in some newborns were detected only after depletion of IL-10-secreting CD8 cells with enrichment for CD4 cells. These data indicate that prenatal sensitization to blood-stage Plasmodium falciparum occurs frequently in areas where malaria is holoendemic. Modulation of this immunity, possibly by maternal parity and malaria, may affect the acquisition of protective immunity against malaria during infancy. Copyright © 2005, American Society for Microbiology. All Rights Reserved.
Authors & Co-Authors
Malhotra, Indu J.
United States, Cleveland
Case School of Medicine
Mungai, Peter L.
United States, Cleveland
Case School of Medicine
Muchiri, Eric M.
Kenya, Nairobi
Division of Vector Borne Diseases
Ouma, John Henry
Kenya, Maseno
Maseno University
Sharma, Shobhona
India, Mumbai
Tata Institute of Fundamental Research, Mumbai
Kazura, James W.
United States, Cleveland
Case School of Medicine
King, Christopher L.
United States, Cleveland
Case School of Medicine
United States, Cleveland
Louis Stokes Cleveland va Medical Center
Statistics
Citations: 98
Authors: 7
Affiliations: 5
Identifiers
Doi:
10.1128/IAI.73.6.3462-3470.2005
ISSN:
00199567
Research Areas
Infectious Diseases
Maternal And Child Health
Study Locations
Kenya
Participants Gender
Female