Furthermore, IL-7 and its receptor have been implicated in several autoimmune diseases like rheumatoid arthritis (RA) [5], [6], [7], psoriasis [8], spondylarthritis [9], inflammatory bowel’s disease (IBD)[10], [11] multiple sclerosis (MS) [12], [13], [14], and recently primary Sjögren’s Syndrome (pSS) [15], [16]. This evidence concerns the gene IL7 and rheumatoid arthritis.