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Previous studies have suggested that cytoskeletal elements in an altered form in vivo (alcoholic hyalin , AH) are targets for an autoimmune reaction in alcoholic liver disease (ALD). In this study we assayed autoantibodies to cytoskeletal cytoskeletal cytokeratin filaments, intermediate filaments of epithelial cells, by indirect immunofluorescence technique (IIF) using cultured human amnion epithelial cells and PtK 2 cells as targets. Sera from 20 patients with ALD, 38 patients with urogenital cancer, 22 patients with renal diseases, and from 18 healthy controls were studied. Patients with ALD had a significantly increased prevalence of cytokeratin filament autoantibodies using both PtK 2 cells (69%) and human amnion epithelial cells (69%) as substrate, as compared to other groups. The antibodies were mainly of IgA and IgM class and could be demonstrated in all forms of ALD. Interestingly, cytoskeleton antibodies have previously been observed in diseases of viral and "autoimmune" origin.
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