Cells and/or antibodies arising from and directed against the individual's own tissues, as in a. disease.
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au·to·im·mune -im-'yün adj of, relating to, or caused by antibodies or T cells that attack molecules, cells, or tissues of the organism producing them <\autoimmune diseases>
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au·to·im·mune (aw″to-ĭ-mūnґ) characterized by a specific humoral or cell-mediated immune response against constituents of the body's own tissues (self antigens or autoantigens). autoimmunity nMedical dictionary. 2011.