1. Low expression of activation marker CD69 and chemokine receptors CCR5 and CXCR3 on memory T cells after 2009 H1N1influenza A antigen stimulation in vitro following H1N1 vaccination of HIV-infected individuals
- Author
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Kriangkrai Chawansuntati, Nuntisa Chotirosniramit, Khuanchai Suparatpinyo, Oranitcha Kaewthip, Patcharaphan Sugandhavesa, Natthapol Kosashunhanan, Linda Aurpibul, Jiraprapa Wipasa, Taweewat Supindham, Sunida Thetket, Piyathida Sroysuwan, and Thira Sirisanthana
- Subjects
Adult ,Antigens, Differentiation, T-Lymphocyte ,Male ,Cellular immunity ,Receptors, CXCR3 ,Adolescent ,Receptors, CCR5 ,T-Lymphocytes ,Immunology ,HIV Infections ,Biology ,CXCR3 ,Virus ,Immunophenotyping ,Young Adult ,Chemokine receptor ,Influenza A Virus, H1N1 Subtype ,Immune system ,Antigen ,Antigens, CD ,T-Lymphocyte Subsets ,Influenza, Human ,Humans ,Immunology and Allergy ,Lectins, C-Type ,Pharmacology ,virus diseases ,Middle Aged ,Flow Cytometry ,Virology ,Vaccination ,Influenza Vaccines ,Cytokines ,Female ,Immunologic Memory ,Research Paper - Abstract
Unlike well-studied antibody responses to pandemic 2009 H1N1 influenza A virus vaccines in human immunodeficiency virus-infected (HIV+) individuals, less well understood are cell-mediated immune (CMI) responses to this antigen in this susceptible population. We investigated such influenza-specific CMI responses in 61 HIV+ individuals and in 20 HIV-negative (HIV-) healthy controls. Each was vaccinated with a single licensed dose of inactivated, split-virion vaccine comprised of the influenza A/California/7/2009 (H1N1) virus-like strain. Cells collected just prior to vaccination and at 1 and 3 months afterwards were stimulated in vitro with dialyzed vaccine antigen and assayed by flow cytometry for cytokines TNF-α, IFN-γ, IL-2, and IL-10, for degranulation marker CD107a, as well as phenotypes of memory T-cell subpopulations. Comparable increases of cytokine-producing and CD107a-expressing T cells were observed in both HIV+ subjects and healthy HIV-controls. However, by 3 months post-vaccination, in vitro antigen stimulation of peripheral blood mononuclear cells induced greater expansion in controls of both CD4 and CD8 central memory and effector memory T cells, as well as higher expression of the activation marker CD69 and chemokine receptors CCR5 and CXCR3 than in HIV+ subjects. We concluded CD4+ and CD8+ memory T cells produce cytokines at comparable levels in both groups, whereas the expression after in vitro stimulation of molecules critical for cell migration to infection sites are lower in the HIV+ than in comparable controls. Further immunization strategies against influenza are needed to improve the CMI responses in people living with HIV.
- Published
- 2015
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