Sökning: "CD4 T cells"

Visar resultat 1 - 5 av 445 avhandlingar innehållade orden CD4 T cells.

  1. 1. T-cell responses to Helicobacter pylori in humans and a possible role of regulatory T cells

    Författare :Anna Lundgren; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :Helicobacter pylori; mucosal immunology; stomach; duodenum; asymptomatic; duodenal ulcer; gastric adenocarcinoma; T cells; regulatory T cells; dendritic cells; T-cell recruitment;

    Sammanfattning : Helicobacter pylori colonize the stomach and areas of gastric metaplasia in the duodenum. The bacteria induce both local and systemic immune responses, but despite this, the infection normally persists for life and causes chronic gastritis in all infected subjects and peptic ulcers or gastric cancer in 10-20% of infected individuals. LÄS MER

  2. 2. Approaches to analyses of cytotoxic cells. And studies of their role in H. pylori infection

    Författare :Josef Azem; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :Helicobacter pylori; mucosal immunology; stomach; duodenum; asymptomatic; duodenal ulcer; gastric adenocarcinoma; NK cells; T cells; B cells; dendritic cells; cytotoxic;

    Sammanfattning : Helicobacter pylori infection causes chronic gastritis that may progress to peptic ulcers or gastric adenocarcinoma and thereby cause major world-wide health problems. Previous studies have shown that CD4+ T cells and the production of the cytokine IFN- × are important components of the immune response to H. pylori in humans. LÄS MER

  3. 3. Regulation of gut IgA induction by helper T cells

    Författare :Inta Gribonika; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; mucosal immunology; secretory IgA; T regulatory cells; T follicular helper cells; Th17 cells; Peyer s patches; IgA class-switch recombination; germinal centers;

    Sammanfattning : The gut is the largest lymphoid organ in the body. Due to intense and constant exposure to the outside world, it also functions as the most important portal of entry for many pathogens. LÄS MER

  4. 4. Generation of Therapeutic T Cells for Prostate Cancer

    Författare :Ole Forsberg; Magnus Essand; Thomas Tötterman; Gustav Gaudernack; Uppsala universitet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Prostate cancer; T cells; dendritic cells; peptides; cytomegalovirus; adenovirus; immunotherapy; Clinical immunology; Klinisk immunologi; Klinisk immunologi; Clinical Immunology;

    Sammanfattning : The work presented herein focuses on the activation of the adaptive immune system in order to develop T cell-based immunotherapy for viral infections and cancer. The main goal was to identify and activate viral or tumoral antigen-specific T cells by using different identification, isolation and stimulation techniques. LÄS MER

  5. 5. T cells in atherogenesis

    Författare :Anna-Karin L Robertson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; atherosclerosis; T cells; transforming growth factor-beta; CD4; low-density lipoproteins; Th1 Th2; hypercholesterolemia;

    Sammanfattning : The work of this thesis aims to answer the following questions: (1) Which role do CD4+ cells play in atherosclerosis? (2) Is the expression of CD4 essential for the athero-protective effect mediated by immunization with oxidized LDL by adjuvant? (3) How does the antigenspecific T cell response to oxidized LDL influence lesion development? (4) Is there a general shift to Th2 responses in severe hypercholesterolemia? and finally (5) Which role does transforming growth factor-B (TGF-B)-signaling in T cells play in atherogenesis? ApoE-/-CD4-/- mice were used to study the effect of CD4 deficiency in atherosclerosis. The development of atherosclerosis was decreased with attenuated inflammation in apoE-/- mice lacking CD4+ cells compared to immunocompetent apoE-/-. LÄS MER