CCP antibody is an ____

CCP antibody is an ____

• A. IgG antibody that attacks the altered shapes from citrullination
• B. IgM antibody that recognizes rheumatoid factors
• C. Autoantibody targeting DNA
• D. Antibody that neutralizes citrullinated peptides

Answer: (A)

CCP antibodies are IgG autoantibodies directed against citrullinated peptides. Citrullination is a post-translational modification that converts arginine residues in proteins to citulline, creating new epitopes—the altered shapes that these antibodies recognize. In rheumatoid arthritis, anti-CCP antibodies are highly specific for the condition and reflect an autoimmune response to these citrullinated (modified) self-proteins. They are not IgM rheumatoid factor (which targets the Fc region of IgG), they do not target DNA, and they do not neutralize citrullinated peptides; instead, they bind these modified epitopes and serve as a useful diagnostic marker.

CCP antibodies are IgG autoantibodies directed against citrullinated peptides. Citrullination is a post-translational modification that converts arginine residues in proteins to citulline, creating new epitopes—the altered shapes that these antibodies recognize. In rheumatoid arthritis, anti-CCP antibodies are highly specific for the condition and reflect an autoimmune response to these citrullinated (modified) self-proteins. They are not IgM rheumatoid factor (which targets the Fc region of IgG), they do not target DNA, and they do not neutralize citrullinated peptides; instead, they bind these modified epitopes and serve as a useful diagnostic marker.