Also das Abstract von der eular-Konferenz Berlin ist inzwischen doch frei zugänglich! (Dort auf der Homepage) AB0045 THE ORALLY AVAILABLE IMMUNOMODULATOR RHUDEX INHIBITS NAÏVE AND MEMORY T CELL ACTIVATION AND PROLIFERATION AND THE RELEASE OF PRO-INFLAMMATORY TH1 AND TH17 CYTOKINES IN VITRO F. Wartha 1,*, P. Hofmann-Goebel 1, A. Skapenko 2, H. Schulze-Koops 2 1Non-Clinical Development, Medigene Ag, Planegg/Martinsried, 2Division of Rheumatology, Ludwig Maximilian University, Munich, Germany Background: RhuDex, under development as an orally available immunomodulating agent, inhibits the CD80-CD28 costimulatory pathway, thus preventing the interaction between T lymphocyte and APC receptors necessary for T cell activation and proliferation. Objectives: We have investigated the effect of RhuDex in vitro on the activation, proliferation and T helper subclass differentiation of naïve, memory and activated T cells. Methods: Monocyte-derived dendritic cells, maturated in vitro and expressing CD80, were co-cultured with allogeneic naïve and memory T cells in the presence of a monoclonal antibody to CD3. Preactivated T cells, additionally stimulated by an anti-CD28 antibody and thus independent of further co-stimulatory signals, were used as control. RhuDex and the comparator drug abatacept, also interfering with costimulation, were added at the start of the culture. T cell proliferation was measured using a CFSE assay, while T cell activation was assessed by CD25 surface expression using flow cytometry, and release of cytokines IFNγ, IL-4, IL-17A and TNFα was measured by ELISA. .... |