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J Urol. 1994 Mar;151(3):587-92.

Autoantibodies in interstitial cystitis.

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Department of Molecular and Experimental Medicine, W. M. Keck Autoimmune Disease Center, La Jolla, California.


We have identified and partially characterized autoantibodies from the sera of patients with interstitial cystitis. Our characterization included initial screening by antinuclear antibody testing on human HEp-2 cell substrate and mouse kidney/stomach tissue substrate, titering and subtyping of positive sera, and Western blotting to identify target autoantigens. Of 96 interstitial cystitis patients 35 (36%) were positive for antinuclear antibodies at titers of 1/40 or greater. Among the antinuclear antibody patterns observed 24 were dense fine nuclear speckles, 7 were nucleolar, 3 were mitochondrial and 1 was coarse nuclear speckles. All but 4 of the antinuclear antibody positive sera were exclusively of the IgG class. As determined by unique antinuclear antibody staining patterns and by specificities on Western blots, interstitial cystitis autoantibodies appear to recognize novel autoantigens not previously described in patients with systemic autoimmune diseases, such as lupus, scleroderma and Sjögren's syndrome.

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