Proliferative capacity and cytokine production by cells of HIV-infected and uninfected adults with different helminth infection phenotypes in South Africa

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dc.contributor.authorMkhize-Kwitshana, Zilungile L.en_ZA
dc.contributor.authorMabaso, Musawenkosi L.en_ZA
dc.contributor.authorWalzl, Gerharden_ZA
dc.date.accessioned2017-01-26T06:29:22Z
dc.date.available2017-01-26T06:29:22Z
dc.date.issued2014-09-11
dc.date.updated2016-12-09T10:06:20Z
dc.descriptionCITATION: Mkhize-Kwitshana, Z. L., Mabaso, M. L. & Walzl, G. 2014. Proliferative capacity and cytokine production by cells of HIV-infected and uninfected adults with different helminth infection phenotypes in South Africa. BMC Infectious Diseases, 14:499, doi:10.1186/1471-2334-14-499.
dc.descriptionThe original publication is available at http://bmcinfectdis.biomedcentral.com
dc.description.abstractBackground: It has been suggested that the proliferative capacity of cells from individuals with HIV or both HIV and helminth infections is attenuated and cytokine production is dysregulated. This study describes peripheral blood mononuclear cell proliferation capacity and cytokine profile from individuals with HIV or both HIV and helminth infections in South Africa. Methods: Forty HIV-infected and 22 HIV-uninfected participants were randomly selected and stratified into different helminth infection phenotypes by egg excretion and Ascaris lumbricoides specific –immunoglobulin-E (IgE) levels. Five day cell cultures of participants, unstimulated or stimulated with Phytohaemaglutinnin, Streptokinase, HIV-1 p24 and Ascaris lumbricoides worm antigens were stained with monoclonal antibody-fluorochrome conjugates (Ki67-FITC and CTLA-APC-4). Percentage expression of Ki67 and CTLA-4 was measured to determine cell proliferation and regulation, respectively. Culture supernatants were analysed for the expression of 13 cytokines using the Bioplex (BioRad) system. Kruskal Wallis was used to test for differences in variables between helminth infected subgroups who were either having eggs in stool and high IgE (egg+IgEhi); or eggs in stool and low IgE (egg+IgElo); or no eggs in stool and high IgE (egg−IgEhi) and those without helminth infection (egg−IgElo). Results: Individuals excreting eggs in stool with high serum IgE (egg+IgEhi phenotype) had potent mitogen responses but consistently produced low, but statistically non-significant antigen–specific (HIV−1 p24 (p = 0.41) and Ascaris (p = 0.19) and recall antigen (Streptokinase; p = 0.31) Ki67 responses. The group also had reduced type 1 cytokines. Individuals excreting eggs in stool with low serum IgE( egg+IgElo phenotype) had a more favourable antiviral profile, characterized by higher IFNγ, IL-2, lower IL-4 and higher IL-10 production. Conclusion: The findings suggest that dual HIV/helminth infection with egg excretion and/or high Ascaris IgE phenotye may be linked with poor proliferative capacity and deleterious cytokine profile with regards to HIV control.en_ZA
dc.description.urihttp://bmcinfectdis.biomedcentral.com/articles/10.1186/1471-2334-14-499
dc.description.versionPublisher's version
dc.format.extent13 pages
dc.identifier.citationMkhize-Kwitshana, Z. L., Mabaso, M. L. & Walzl, G. 2014. Proliferative capacity and cytokine production by cells of HIV-infected and uninfected adults with different helminth infection phenotypes in South Africa. BMC Infectious Diseases, 14:499, doi:10.1186/1471-2334-14-499
dc.identifier.issn1471-2334 (Online)
dc.identifier.otherdoi:10.1186/1471-2334-14-499
dc.identifier.urihttp://hdl.handle.net/10019.1/100541
dc.language.isoen_ZAen_ZA
dc.publisherBioMed Central
dc.rights.holderAuthor retains copyright
dc.subjectHelminthiasisen_ZA
dc.subjectCell proliferationen_ZA
dc.subjectHIV infections -- Immunological aspectsen_ZA
dc.subjectCytokinesen_ZA
dc.subjectPhenotype plasticityen_ZA
dc.titleProliferative capacity and cytokine production by cells of HIV-infected and uninfected adults with different helminth infection phenotypes in South Africaen_ZA
dc.typeArticle
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