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Taylor and Francis Group, Autoimmunity, 4(42), p. 325-327

DOI: 10.1080/08916930902828049

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Both early and late apoptotic blebs are taken up by DC and induce IL-6 production.

This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

During apo blebs, containing nuclear components, are formed at the cells' surfaces. When these blebs separate from the dying cell an apo cell body remains. The contents of apo blebs are modified and can be released, especially in patients with systemic lupus erythematosus (SLE) since impaired clearance of apo material has been observed in this autoimmune condition. Accordingly, autoantibodies present in subjects with SLE bind to apo blebs. Based on AnxA5 binding, and permeability for PI, we show that apo blebs can be categorized as early (AnxA5(+)/PI(- )) or late (AnxA5(+)/PI(+)) apo ones. Both forms of blebs contain apo-induced chromatin modifications and are efficiently phagocytosed by dendritic cell (DC). Uptake by DC of late, but also early apo blebs, stimulate DC to produce IL-6. This bleb-induced effect on DC may be an important step in the initiation of the autoimmune responses in SLE.