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Abstract
A characteristic of apo cell death is the shedding of membrane vesicles from the dying cell. This process is also referred to as apo membrane blebbing. These apo particles contain various autoantigens and are effectively engulfed by phagocytes. A defective phagocytosis has been described in autoimmune diseases like systemic lupus erythematosus and this defect might lead to an accumulation of apo cells and bodies. Thus, we investigated the interactions between apototic cell-derived membrane vesicles (ACdMV), and myeloid dendritic cell (DC). ACdMV were isolated from the supernatant of apo lymphocytes. These isolated ACdMV were morphologically characterized as membrane coated vesicles of an average size of 500 nm. Coincubating isolated ACdMV with iDC we observed CD83 surface expression of the latter. Accumulation of ACdMV may contribute to an inflammatory immune response in autoimmune diseases.