Mostrando recursos 1 - 5 de 5

  1. Clusters of cytokines determine malaria severity in Plasmodium falciparum - Infected patients from endemic areas of central India

    Prakash, D.; Fesel, C.; Jain, R.; Cazenave, P.A.; Mishra, G.C.; Pied, S.
    We investigated the role of interferon (IFN)- gamma , interleukin (IL)-1 beta , IL-2, IL-4, IL-5, IL-6, IL-10, IL-12, tumor necrosis factor (TNF)- alpha , and transforming growth factor (TGF)- beta in clinically well-defined groups of Plasmodium falciparum-infected patients manifesting mild malaria (MM), severe noncerebral malaria (SM), or cerebral malaria (CM) and in control subjects from Gondia, a malaria-endemic site in India, as well as in healthy subjects from non-malaria-endemic areas. Two-way coupled cluster analysis revealed 2 clusters of cytokines relevant to clinical subgroups of disease. The first cluster was composed of IFN- gamma , IL-2, IL-5, IL-6, and IL-12,...
    - 31-ago-2011

  2. Increased polyclonal immunoglobulin reactivity toward human and bacterial proteins is associated with clinical protection in human Plasmodium infection

    Fesel, C.; Goulart, L.F.; Neto, A.S.; Coelho, A.; Fontes, C.J.F.; Braga, E.M.; Vaz, N.M.
    The observed difference in polyclonal antibody production seems related to intrinsic activation states of infected individuals, rather than to parasite-antigen specific immune responses. However, it appears influenced by preceding stimuli. This supports the idea that acquired clinical immunity may not exclusively depend on antigen-specific responses, but also on the individual polyclonal reaction.
    - 31-ago-2011

  3. Total and functional parasite specific IgE responses in Plasmodium falciparum-infected patients exhibiting different clinical status

    Duarte, J.; Deshpande, P.; Guiyedi, V.; Mecheri, S.; Fesel, C.; Cazenave, P.A.; Mishra, G.C.; Kombila, M.; Pied, S.
    Blood samples were collected from controls and P. falciparum-infected patients before treatment on the day of hospitalization (day 0) in India and, in addition, on days 7 and 30 after treatment in Gabon. Total IgE levels were determined by ELISA and functional P. falciparum-specific IgE were estimated using a mast cell line RBL-2H3 transfected with a human Fcε RI α-chain that triggers degranulation upon human IgE cross-linking. Mann Whitney and Kruskall Wallis tests were used to compare groups and the Spearman test was used for correlations. Total IgE levels were confirmed to increase upon infection and differ with level of transmission...
    - 31-ago-2011

  4. Self-reactivities to the non-erythroid alpha spectrin correlate with cerebral malaria in Gabonese children

    Guiyedi, V.; Chanseaud, Y.; Fesel, C.; Snounou, G.; Rousselle, J.C.; Lim, P.; Koko, J.; Namane, A.; Cazenave, P.A.; Kombila, M.; Pied, S.
    Hypergammaglobulinemia and polyclonal B-cell activation commonly occur in Plasmodium sp. infections. Some of the antibodies produced recognize self-components and are correlated with disease severity in P. falciparum malaria. However, it is not known whether some self-reactive antibodies produced during P. falciparum infection contribute to the events leading to cerebral malaria (CM). We show here a correlation between self-antibody responses to a human brain protein and high levels of circulating TNF alpha (TNFα), with the manifestation of CM in Gabonese children
    - 31-ago-2011

  5. IgG autoantibody to brain beta tubulin III associated with cytokine cluster-II discriminate cerebral malaria in central India

    Bansal, D.; Herbert, F.; Lim, P.; Deshpande, P.; Becavin, C.; Guiyedi, V.; de Maria, I.; Rousselle, J.C.; Namane, A.; Jain, R.; Cazenave, P.A.; Mishra, G.C.; Ferlini, C.; Fesel, C.; Benecke, A.; Pied, S.
    We investigated the significance of these self-reactive antibodies in clinically well-defined groups of P. falciparum infected patients manifesting mild malaria (MM), severe non-cerebral malaria (SM), or cerebral malaria (CM) and in control subjects from Gondia, a malaria epidemic site in central India using quantitative immunoprinting and multivariate statistical analyses. A two-fold complete-linkage hierarchical clustering allows classifying the different patient groups and to distinguish the CM from the others on the basis of their profile of IgG reactivity to brain proteins defined by PANAMA Blot. We identified beta tubulin III (TBB3) as a novel discriminant brain antigen in the prevalence of...
    - 31-ago-2011

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