Abstract
While several characteristics of systemic lupus erythematosus (SLE) have been investigated, the distinct pathogenetic mechanisms leading to autoimmunity and chronic inflammation are not understood yet. A central role for apo has been implicated in the pathogenesis of SLE and an increased rate of apo or a defective clearance of apo cells have repeatedly been described in SLE patients, which show elevated levels of alpha-interferon (αIFN) as well as an enhanced expression of αIFN-alpha inducible genes referred to as αIFN signature. Recent publications link αIFN and apo: apo cell-derived microparticles can directly stimulate plasmacytoid dendritic cells to secret αIFN. This review highlights the role of apo material as source for AAg and as a trigger for chronic inflammation in the pathogenesis of SLE.