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  • Title: [A novel method for screening anti-inner ear autoantibody in patients with autoimmune diseases].
    Author: Zou J, Bi A, Wu X, Yang W, Li Z.
    Journal: Zhonghua Er Bi Yan Hou Ke Za Zhi; 2000 Apr; 35(2):113-6. PubMed ID: 12768666.
    Abstract:
    OBJECTIVE: To appraise the clinical value of a newly established method, rapid electric field immobilizing liquid phase molecule dot blot analysis (REILMD), for screening anti-inner ear autoantibody in patients with autoimmune diseases. METHODS: Seventy-one patients with 11 kinds of autoimmune diseases were chosen for the study. Both the general immunity and autoantibodies were tested. In the processes of detection of anti-inner ear autoantibody, REILMD was used for screening, and then the Western blot was used to define the molecular weight of inner ear antigen recognized by the positive autoantibody. RESULTS: Acceleration of erythrocyte sedimentation rate (ES), positive rheumatoid factor (RF), increases in C reactive protein (CRP), IgG and circulating immune complex (CIC) were found in most cases with rheumatoid arthritis (RA) and systemic lupus erythematodes (SLE). Some of these patients had increased IgA, IgM and C4. Two of 16 RA had anti-double-stranded DNA (dsDNA) and anti-mitochondria and 4/16 had anti-nucleus antibodies. Eleven of 16 SLE had antinucleus, 7/13 had anti-ribonucleoprotein (RNP), anti-Sjögren syndrome A (SSA) and anti-dsDNA, 3/13 had anti-smooth muscle (Sm) and 1/13 had anti-DNA topoisomerase I (Scl)-70, striated muscle and stomach acid cell antibodies. No autoantibody was detected in AS. Anti-inner ear autoantibody existed in 9 out of 71 patients (13%) with autoimmune diseases, in 2 of 21 patients (10%) with sudden deafness and only in 1 of 48 control subjects (2%, coronary heart disease). The anti-inner ear autoantibody was positive in 5 of 16 (31%) patients with SLE and 1 each in RA, AS, Behset's disease and streptococcus infection syndrome. In patients with positive anti-inner ear antibody, 67% had anti-nucleus antibody, 50% had anti-RNP and dsDNA antibody. The molecules recognized by the positive anti-inner ear antibody were defined as 52,000, 36,000, 31,000 and 15,000 molecules of inner ear antigen. CONCLUSION: REILMD is a feasible and easy method for screening anti-inner ear autoantibody. Several autoimmune diseases, particularly SLE, may be implicated in damage to the inner ear.
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