Details

Autor(en) / Beteiligte

• Suzuki, Akari
• Yamada, Ryo
• Ohtake-Yamanaka, Miyako
• Okazaki, Yuko
• Sawada, Tetsuji
• Yamamoto, Kazuhiko

Titel

Anti-citrullinated collagen type I antibody is a target of autoimmunity in rheumatoid arthritis

Ist Teil von

• Biochemical and biophysical research communications, 2005-07, Vol.333 (2), p.418-426

Ort / Verlag

United States: Elsevier Inc

Erscheinungsjahr

2005

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• Rheumatoid arthritis (RA) is one of the most common autoimmune diseases, but its autoimmune mechanisms are not clearly understood. Recently, anti-citrullinated peptide antibodies have been specifically observed in sera of RA patients. Furthermore, we identified RA-susceptible variant in a gene encoding citrullinating enzyme, peptidylarginine deiminase type 4 (PADI4). Therefore, we hypothesized that proteins which are modified in RA synovium by PADI4 act as autoantigens. Subsequently, we obtained human collagen type I (huCI) as one of the autoantigens using a RA synoviocyte cDNA library by immunoscreening. We also investigated that the levels of anti-citrullinated huCI were significantly higher in RA patient sera than in normal control sera with high specificity (99%) and positively correlated with the levels of anti-cyclic citrullinated peptide (anti-CCP) antibodies. We concluded that huCI is a novel substrate protein of PADIs and that citrullinated huCI is a candidate autoantigen of RA.