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  • Title: The importance of alpha-fodrin antibodies in the diagnosis of Sjögren's syndrome.
    Author: Turkçapar N, Olmez U, Tutkak H, Duman M.
    Journal: Rheumatol Int; 2006 Feb; 26(4):354-9. PubMed ID: 15990993.
    Abstract:
    OBJECTIVE: We wanted to determine the prevalence of IgA and IgG antibodies against alpha-fodrin in the patients with primary and secondary Sjögren's syndrome (SS) and also to compare with anti-Ro and anti-La antibodies in the diagnosis of SS. METHODS: We tested the prevalence of anti-alpha-fodrin IgA, IgG, anti-Ro, anti-La antibodies, anti-nuclear antibodies (ANA) and rheumatoid factor (RF) in naive patients with primary (n = 20) and secondary SS (n = 20) (Rheumatoid Arthritis [RA]+SS, n = 10; Systemic Lupus Erythematosus [SLE] + SS, n = 10), RA (n = 10), SLE (n = 10) and in healthy controls (n = 20). Salivary gland biopsies were performed in the patients with primary and secondary SS. RESULTS: In primary SS, anti-alpha-fodrin IgA, IgG, anti-Ro and anti-La antibodies were detected as 20, 10, 55 and 20% respectively. In RA + SS, anti-alpha-fodrin IgA was detected to be 10% and IgG was negative; however, anti-Ro antibodies and anti-La antibodies were found to be 40% and 20% respectively. In SLE + SS, anti-alpha-fodrin IgA was found to be 20% and IgG was found to be 10%, but anti-Ro and anti-La antibodies were found to be 90% and 20% respectively. Alpha-fodrin antibodies were not detected in RA, SLE and healthy controls. CONCLUSION: The detection of anti-alpha-fodrin antibodies by used ELISA does not give much contribution to the diagnosis of SS, and anti-Ro and anti-La are still useful serological markers in the diagnosis of SS.
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