Significance of antibody against ?-fodrin-derived polypeptide in diagnosis of Sjgren′s syndrome / 中华风湿病学杂志

Objective To investigate the sensitivity and specificity of anti ? fodrin polypeptide antibody in Sjgren′s syndrome (SS) patients.Methods Synthesized ? fodrin polypeptide was used as substrate in enzyme linked immunosorbent assay (ELISA) to detect the specific antibody in sera of SS and other rheumatic diseases.Results Antibody against ? fodrin polypeptide were detected in 73% of patients with primary SS,40% of patients with secondary SS,19 5% of patients with SLE,29 5% of patients with RA,and 3 8% of normal blood donors.The positive rates of ? fodrin polypeptide antibody in primary and secondary SS (73% and 40%,respectively) were significantly higer than those in SLE,RA and normal controls ( P