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Sökning: WFRF:(Moll K)

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  • Balogun, Halima A., et al. (författare)
  • Immunogenicity and antigenic properties of Pf332-C231, a fragment of a non-repeat region of the Plasmodium falciparum antigen Pf332
  • 2009
  • Ingår i: Vaccine. - : Elsevier BV. - 0264-410X .- 1873-2518. ; 28:1, s. 90-97
  • Tidskriftsartikel (refereegranskat)abstract
    • Antigen Pf332, a megadalton protein has been shown to be associated with the membrane of infected erythrocytes. Detailed functional studies on the antigen have remained hampered by the cross-reactive nature of antibodies generated to Pf332. Pf332-C231, identified in the C-terminal region of Pf332 was cloned and antibodies against the C231 fragment were shown to react with intact Pf332 antigen by both immunofluorescence and immunoblotting analyses. Antibodies to C231 inhibited in vitro Plasmodium falciparum growth efficiently. In addition, human sera from malaria-exposed individuals reacted with recombinant C231. We show that Pf332-C231 represents a functional domain and is expected to facilitate further studies on Pf332 as a potential target for protective immune responses and the function of the antigen.
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  • Bächle, Susanna M., et al. (författare)
  • Elevated levels of iNKT cell and NK cell activation correlate with disease progression in HIV-1 and HIV-2 infections
  • 2016
  • Ingår i: AIDS. - 0269-9370. ; 30:11, s. 1713-1722
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVE:: In this study we aimed to investigate the frequency and activation of invariant natural killer T (iNKT) cells and natural killer (NK) cells among HIV-1, HIV-2, or dually HIV-1/HIV-2 (HIV-D)-infected individuals, in relation to markers of disease progression. DESIGN:: Whole blood samples were collected from treatment-naïve HIV-1 (n?=?23), HIV-2 (n?=?34) and HIV-D (n?=?11) infected individuals, as well as HIV-seronegative controls (n?=?25), belonging to an occupational cohort in Guinea-Bissau. METHODS:: Frequencies and activation levels of iNKT and NK cell subsets were analysed using multi-colour flow cytometry and results were related to HIV-status, CD4+ T cell levels, viral load, and T cell activation. RESULTS:: HIV-1, HIV-D, and viremic HIV-2 individuals had lower numbers of CD4+ iNKT cells in circulation compared to seronegative controls. Numbers of CD56 NK cells were also reduced in HIV-infected individuals as compared to control subjects. Notably, iNKT cell and NK cell activation levels, assessed by CD38 expression, were increased in HIV-1 and HIV-2 single, as well as dual, infections. HIV-2 viremia was associated with elevated activation levels in CD4+ iNKT cells, CD56 and CD56 NK cells, as compared to aviremic HIV-2 infection. Additionally, disease markers such as CD4+ T cell percentages, viral load, and CD4+ T cell activation were associated with CD38 expression levels of both iNKT and NK cells, which activation levels also correlated with each other. CONCLUSIONS:: Our data indicate that elevated levels of iNKT cell and NK cell activation are associated with viremia and disease progression markers in both HIV-1 and HIV-2 infections.
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