Most of the researchers preferred the human samples or animal model (Rat or Mice) for the rheumatoid arthritis research. Because, it is a bone related disease. If you need cell line related studies on RA, you can use NIH-3T3 mouse embryo fibroblast cell line or sarcoma cell line (SW982). But animal model is much better than cell line studies. Because we easily observe the bone destruction, bone re-modelling, swelling and inflammation

Thank you Mr. Selvakumar Murugesan

https://www.researchgate.net/post/Which_kind_of_cell_line_should_be_used_in_the_study_of_rheumatoid_arthritis

Thank you Prof.Gheita