The BALB/c-Zap70*W163C (SKG) mouse (referred to as the SKG mouse) is an autoimmune disease research model constructed by Cyagen through gene editing technology to introduce the W163C mutation into the Zap70 gene of BALB/c mice. The phenotype of this model is similar to that of the classic SKG mouse. Under SPF conditions, upon triggering innate immune activation (such as β-glucan induction), it can present a variety of autoimmune disease phenotypes. Therefore, this mouse can be used for research on autoimmune diseases such as rheumatoid arthritis (RA), ankylosing spondylitis (AS), psoriasis-like skin inflammation, RA-associated interstitial lung disease (RA-ILD), and Crohn’s disease-like ileitis, as well as T cell signal transduction.