Relationship between inflammatory mediator patterns and anemia in HIV-1 positive and exposed children with Plasmodium falciparum malaria

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dc.contributor.authorDavenport, G. C.
dc.contributor.authorHittner, James B.
dc.contributor.authorWere, T.
dc.contributor.authorOng'echa, J. M.
dc.contributor.authorPerkins, D. J.
dc.date.accessioned2013-12-17T08:43:09Z
dc.date.available2013-12-17T08:43:09Z
dc.date.issued2012
dc.descriptiondoi: 10.1002/ajh.23200en_US
dc.description.abstractAnemia is the primary hematological manifestation of both Plasmodium falciparum malaria and HIV-1 in pediatric populations in sub-Saharan Africa. We have previously shown that HIV-1 positive and exposed children have greater risk of developing severe anemia (hemoglobin, Hb <6.0 g dL⁻¹) during acute malaria. However, enhanced severity of anemia was unrelated to either erythropoietic suppression or parasite-driven red blood cell hemolysis. To further explore mechanisms of anemia, circulating inflammatory mediators (IMs) were determined using a 25-plex bead array in P. falciparum-infected (Pf[+]) children (3-36 month, n = 194) stratified into three groups: HIV-1 negative (HIV-1[-]/Pf[+]); HIV-1 exposed (HIV-1[exp]/Pf[+]); and HIV-1 infected (HIV-1[+]/Pf[+]). IL-12, MIG/CXCL9, eotaxin/CCL11, and GM-CSF differed significantly and progressively increased across the groups (HIV-1[-] →HIV-1[exp] →HIV-1[+]). To further explore the relationship between the inflammatory milieu (i.e., cytokines, chemokines, and growth factors) and HIV-1 status, the large panel of IMs was reduced into discrete groups by principal component factor analysis. Of the six principal components that emerged, three components were significantly higher in the HIV-1 [+]/pf [+] and HIV [exp]/Pf [+] groups, demonstrating that inflammatory profiles differ according to HIV-1 status. Additional analyses exploring the relationship between the components and anemia revealed significant positive correlations between Hb and Component 3 (IL-1Ra, IL-7, IL-17, IFN-α, IFN-γ, MIG/CXCL9) in the HIV-1[-]/Pf [+] group, and Component 4 (IL-4, IL-5, IL-12, Eotaxin/CCL11) in HIV-1[+]/Pf [+] children. Further analyses of the HIV-1[+]/Pf [+] group revealed that IL-12 had the strongest association with anemia. Results presented here demonstrate that there are unique relationships between the inflammatory environment and anemia in HIV-1 positive and exposed children with malaria.en_US
dc.identifier.citationWiley Periodicals, Inc. 87(7):652-8, July 2012en_US
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/8075
dc.language.isoenen_US
dc.publisherWiley Periodicals, Inc.en_US
dc.titleRelationship between inflammatory mediator patterns and anemia in HIV-1 positive and exposed children with Plasmodium falciparum malariaen_US
dc.typeArticleen_US
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