This review explores how transposable elements, which are parts of our DNA that can move around, might play a role in autoimmune diseases. The review looks at how changes in these elements, specifically through methylation and expression, are linked to conditions like Type 1 diabetes, systemic lupus erythematosus, and rheumatoid arthritis.
In Type 1 diabetes, researchers have seen changes in DNA patterns before the disease starts. In lupus, certain genetic elements show increased activity that tracks with inflammation signals. For rheumatoid arthritis, changes in these elements are linked to how well patients respond to the medication methotrexate.
These genetic elements may act as a bridge between a person's genetic risk and environmental triggers. They might trick the immune system into reacting as if it were fighting a virus. This process, known as viral mimicry, can drive the inflammation seen in these diseases.
Because this is a narrative review of existing knowledge, it is not a new clinical trial. While these findings offer potential for developing new biomarkers and treatments, more research is needed to understand how to use this information in practice.