51 research outputs found

    Changes of T-lymphocyte subpopulation and differential expression pattern of the T-bet and GATA-3 genes in diffuse large B-cell lymphoma patients after chemotherapy

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    BACKGROUND AND OBJECTIVE: T cell-mediated immunity plays an important role in enhancing antitumor response.This study aimed to investigate the changes in the T-lymphocyte subpopulation and to characterize the differential expression pattern of corresponding regulatory genes in peripheral blood mononuclear cells (PBMCs) from diffuse large B cell lymphoma (DLBCL) patients before and after chemotherapy. METHODS: A total of 56 DLBCL patients were recruited for analysis of T-cell subset distribution in the peripheral blood using flow cytometry; serum interferon (IFN)-γ and interleukin (IL)-4 levels using enzyme-linked immunosorbent assays; and early growth response protein 1 (EGR-1), T-bet, GATA-binding protein 3 (GATA-3), and transforming growth factor (TGF)-β mRNA levels using quantitative reverse-transcription polymerase chain reaction. Twenty-six healthy subjects served as controls. RESULTS: The percentage of CD3(+)CD4(+)T lymphocytes in peripheral blood from DLBCL patients was significantly decreased, whereas the percentages of CD3(+)CD8(+)T and CD4(+)CD25(+)T cells were significantly increased compared to those in controls (p < 0.05). Serum levels of IFN-γ and IL-4 were also significantly lower in DLBCL patients than those in controls (p < 0.05), and the levels of EGR-1, T-bet, and GATA-3 mRNA in PBMCs were lower (2.69 ± 1.48, 9.43 ± 2.14, and 20.83 ± 9.05 fold, respectively) in DLBCL patients than those in controls. Furthermore, there was a positive association between the levels of EGR-1 and T-bet mRNA (p = 0.001). However, the level of TGF-β mRNA was significantly increased in DLBCL patients, which was inversely associated with the T-bet mRNA level (p = 0.008), but positively associated with the percentage of T regulatory cells in PBMCs (p = 0.011). After three cycles of chemotherapy, the distribution of T-lymphocyte subsets in DLBCL patients were changed, and the levels of EGR-1, T-bet, and GATA-3 mRNA were significantly increased (p < 0.05) compared to those before chemotherapy. CONCLUSIONS: These results demonstrate the changes in T-lymphocyte subpopulations and the altered expression 34 pattern of the corresponding regulatory genes in PBMCs from DLBCL patients after chemotherapy, which are associated with the response of patients to treatment. The preferential expression of the T-bet gene after chemotherapy was closely correlated with the increased expression of the EGR-1 gene and decreased expression of the TGF-β gene

    A Catalogue of Recorded Classical and Traditional Indian Music

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    Localisation par canalisation des impuretés implantées dans le ZnTe

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    Due to difficulties to design p-n junctions by means of ionic implantation in ZnTe, we have used channelling techniques to locate implanted impurities and to follow their behaviour in function of the anneal temperature. First, we have summarized the available data on lattice location experiments concerning Silicon and have correlated these measurements with the limit solubility values. Then, concerning ZnTe, we studied the lattice location of elements of column III (B, Tl), V (Bi) and VII (F). Bismuth is found to be at a substitutional site for the anneal temperature of 550 °C.La difficulté de créer par implantation ionique des jonctions p-n dans le ZnTe nous a incités à localiser par les techniques de canalisation les impuretés implantées et à suivre leur évolution en fonction de la température de recuit. Les possibilités de localisation étant liées à la solubilité, les données existantes concernant les expériences de localisation dans le Silicium ont été corrélées avec les valeurs disponibles des solubilités limites. Ne disposant d'aucune donnée concernant le ZnTe, nous avons étudié successivement la localisation des éléments de la colonne III (B, TI), V (Bi) et VII (F). Nous avons trouvé que le Bismuth se place en position substitutionnelle à la température de recuit de 550 °C

    Gene flow within a population of the outbreeding Sinapis arvensis. Isozyme analysis of half-sib families

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    Localisation par canalisation des impuretés implantées dans le ZnTe

    No full text
    La difficulté de créer par implantation ionique des jonctions p-n dans le ZnTe nous a incités à localiser par les techniques de canalisation les impuretés implantées et à suivre leur évolution en fonction de la température de recuit. Les possibilités de localisation étant liées à la solubilité, les données existantes concernant les expériences de localisation dans le Silicium ont été corrélées avec les valeurs disponibles des solubilités limites. Ne disposant d'aucune donnée concernant le ZnTe, nous avons étudié successivement la localisation des éléments de la colonne III (B, TI), V (Bi) et VII (F). Nous avons trouvé que le Bismuth se place en position substitutionnelle à la température de recuit de 550 °C

    Intonation in present-day North Indian classical music

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    Détection sismique des avalanches : conception et validation d'un système pré-opérationnel

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    For a few years the Centre d'Etudes de la Neige (Snow Research Center) in Grenoble has been studying the feasibility of the seismic detection of avalanches (SDA). The SDA is aiming to produce a real-time estimation of the avalanche activity of a massif from three-component seismic signals. An analysis and decision system, using fuzzy logic, has been built in order to discriminate avalanche signals from other types of signals. A few experimental results for winter 94-95 are presented. They show the interest of the SDA for operational applications. / Depuis quelques années le Centre d'Etudes de la Neige de Grenoble (CEN) a mis en place un programme de détection sismique des avalanches (DSA). Dans un cadre opérationnel, la DSA est susceptible de fournir en temps réel une estimation de l'activité avalancheuse au sein d'un massif à partir d'enregistrements sismiques à trois composantes. Un système d'analyse-expertise à logique floue a été conçu afin de discriminer les signaux d'avalanches des autres types de signaux. A travers quelques résultats obtenus lors de l'hiver 94-95 nous montrons l'intérêt de la DSA pour des applications opérationnelles concrètes
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