Diagnostic Performances of Anti-Cyclic Citrullinated Peptides Antibody and Antifilaggrin Antibody in Korean Patients with Rheumatoid Arthritis.
10.3346/jkms.2005.20.3.473
- Author:
Suk Woo CHOI
1
;
Mi Kyoung LIM
;
Dong Hyuk SHIN
;
Jeong Jin PARK
;
Seung Cheol SHIM
Author Information
1. Department of Laboratory Medicine, Eulji University, School of Medicine, Daejeon, Korea.
- Publication Type:Original Article ; Comparative Study ; Research Support, Non-U.S. Gov't
- Keywords:
Arthritis, Rheumatoid;
Rheumatoid Factor;
Anti-cyclic citrullinated peptide;
Anti-citrullinated filaggrin Antibody
- MeSH:
Adolescent;
Adult;
Aged;
Antibodies/*diagnostic use/immunology;
Arthritis, Rheumatoid/*diagnosis/immunology;
Comparative Study;
Enzyme-Linked Immunosorbent Assay/methods;
Female;
Humans;
Intermediate Filament Proteins/*immunology;
Korea;
Male;
Middle Aged;
Peptides, Cyclic/*immunology;
Research Support, Non-U.S. Gov't;
Rheumatoid Factor/immunology;
Sensitivity and Specificity
- From:Journal of Korean Medical Science
2005;20(3):473-478
- CountryRepublic of Korea
- Language:English
-
Abstract:
Rheumatoid arthritis (RA) is a systemic autoimmune disease of unknown etiology. We studied the diagnostic performances of anti-cyclic citrullinated peptides antibody (anti-CCP) assay and recombinant anti-citrullinated filaggrin antibody (AFA) assay by enzyme linked immunosorbent assay (ELISA) in patients with RA in Korea. Diagnostic performances of the anti-CCP assay and AFA assay were compared with that of rheumatoid factor (RF) latex fixation test. RF, anti-CCP, and AFA assays were performed in 324 RA patients, 251 control patients, and 286 healthy subjects. The optimal cut off values of each assay were determined at the maximal point of area under the curve by receiver-operator characteristics (ROC) curve. Sensitivity (72.8%) and specificity (92.0%) of anti-CCP were better than those of AFA (70.3%, 70.5%), respectively. The diagnostic performance of RF showed a sensitivity of 80.6% and a specificity of 78.5%. Anti-CCP and AFA showed positivity in 23.8% and 17.3% of seronegative RA patients, respectively. In conclusion, we consider that anti-CCP could be very useful serological assay for the diagnosis of RA, because anti-CCP revealed higher diagnostic specificity than RF and AFA at the optimal cut off values and could be performed by easy, convenient ELISA method.
