Additionally, a study on the chemotactic potential of CCL25 on human mesenchymal progenitor cells from subchondral cortical sponge bone in normal, rheumatoid arthritis (RA), and OA synovial fluid (SF) showed that CCL25 could enhance subchondral progenitor cell migration and induce cartilage tissue repair (44). The gene discussed is CCL25; the disease is rheumatoid arthritis.