Qixing Li, Yanpeng Li, Bibo Liang, Rui Xu, Bingze Xu, Erik Lönnblom, Hui Feng, Jing'an Bai, Roma Stawikowska, Changrong Ge, Aiping Lu, Gregg B Fields, Lianbo Xiao, Rikard Holmdahl
OBJECTIVE: To investigate the occurrence and frequency of anti-citrullinated protein antibodies (ACPA) to cyclic citrullinated type II collagen (COL2) epitope with a capacity to bind joint cartilage. METHODS: Luminex immunoassay was used to analyze serum antibody reactivity to 10 COL2-citrullinated peptides (ACC10) and corresponding arginine peptide controls in rheumatoid arthritis (RA), osteoarthritis (OA), and healthy individuals' cohorts. Top ten "promiscuous" sera (cross-reactive with all ACC10) and top ten "private" sera (restrictedly reactive with one ACC10 peptide) from RA and OA cohorts were selected...
November 22, 2022: Arthritis Research & Therapy