FoxP3 (Forkhead box P3) gene expression and Regulatory T cells (Tregs) are at the forefront of future therapies for autoimmune diseases, including Type 1 Diabetes (T1D) and rheumatoid arthritis (RA). Tregs are a specialized subset of CD4 T cells that express the FoxP3 master regulator transcription factor, responsible for suppressing immune responses and maintaining immune tolerance. In autoimmune diseases, these cells are often impaired in number or function, allowing autoreactive immune cells