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    Autoimmunity. 2007 Jun;40(4):274-80.

    The affirmative response of the innate immune system to apoptotic cells.

    Source

    Division of Nephrology, Department of Medicine, University of Illinois at Chicago, IL 60612, USA.

    Abstract

    Growing evidence exists for a new role for apoptotic cell recognition and clearance in immune homeostasis. Apoptotic cells at all stages, irrespective of membrane integrity, elicit a signature set of signaling events in responding phagocytes, both professional and non-professional. These signaling events are initiated by receptor-mediated recognition of apoptotic determinants, independently of species, cell type, or apoptotic stimulus. We propose that the ability of phagocytes to respond to apoptotic targets with a characteristic set of signaling events comprises a second distinct dimension of innate immunity, as opposed to the traditional innate discrimination of self vs. non-self. We further propose that a loss or abnormality of the signaling events elicited by apoptotic cells, as distinct from the actual clearance of those cells, may predispose to autoimmunity.

    PMID:
    17516209
    [PubMed - indexed for MEDLINE]

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