Retrotransposons In Bone And Joint Diseases
Our bodies contain fascinating genetic elements called retrotransposons, which are essentially “jumping genes” that can copy and paste themselves into different parts of our DNA. For a long time, these elements were thought to be inactive remnants of our evolutionary past, often dismissed as “junk DNA.” However, new research reveals that these dormant genetic passengers can “wake up” under certain conditions, particularly in the context of chronic bone and joint diseases.
When the normal control mechanisms that keep these elements silenced—known as epigenetic control—break down, these retrotransposons, especially a type called endogenous retroviruses (ERVs), become active. This activation can trick our immune system into thinking there’s a viral infection, a process called “viral mimicry.” This mistaken identity triggers both immediate and long-term immune responses, leading to inflammation and contributing to the aging of cells, a process known as cellular senescence.
This newfound understanding suggests that these reactivated genetic elements play a significant role in the development and progression of conditions like osteoarthritis and rheumatoid arthritis. The exciting implication is that by targeting the dysregulation of these retrotransposons or the pathways they activate, we might uncover new therapeutic strategies to treat these debilitating bone and joint disorders.
Source: link to paper