Mitochondrial Quality Control In Degenerative Musculoskeletal Diseases: Signaling Networks And Therapeutic Landscapes
Have you ever wondered why our joints, spinal discs, and bones seem to wear down as we age? Recent insights suggest that these common degenerative conditions might be linked to how our cells maintain their tiny powerhouses, called mitochondria. Mitochondria are essential for generating the energy our cells need to function properly.
Our cells have a sophisticated “quality control” system for these powerhouses, ensuring they remain healthy and efficient. This system involves processes like replacing old or damaged mitochondria and repairing others. However, when this cellular maintenance system falters, it can have significant consequences for our musculoskeletal health.
When the quality control of these cellular powerhouses breaks down, damaged components, such as fragments of their genetic material (mitochondrial DNA), can be released. These fragments act as “damage signals” that alert the immune system, triggering an inflammatory response through a pathway known as cGAS-STING signaling. This inflammation can contribute to the progression of conditions like osteoarthritis, intervertebral disc degeneration, and osteoporosis. Furthermore, changes in cellular metabolism can lead to modifications in how our genes are expressed, a process called epigenetic remodeling, specifically through something called histone lactylation, which also plays a role in these diseases. Understanding these intricate cellular processes opens new avenues for developing treatments that target the root causes of these debilitating conditions, rather than just managing symptoms.
Source: link to paper