CCR5 and rheumatoid arthritis: These findings could also help to find novel therapeutic tools as CCR5 plays a role in the distribution of effector cells to sites of microbial infection where CCR5 contributes to microbial control and/or elimination17, in the regulation T cell function in autoimmune diseases, including multiple sclerosis, rheumatoid arthritis, and type 1 diabetes52 and in tumorigenesis53, 54.