Progress In Research On The Association Between Mesenchymal Stem Cell Senescence And Knee Osteoarthritis
As we age, our joints, particularly our knees, can suffer from a condition called osteoarthritis, which involves the breakdown of cartilage and persistent inflammation. Our bodies have special cells called mesenchymal stem cells, or MSCs, that are vital for keeping our joints healthy, managing inflammation, and helping to repair damaged cartilage.
However, these MSCs can also age, a process known as senescence. When MSCs become senescent, they lose their ability to multiply, repair tissues, and perform their normal functions effectively. This decline is linked to several cellular changes, including the shortening of protective caps on DNA (telomeres), damage to DNA, problems with the energy-producing parts of cells (mitochondria), and the release of harmful substances that promote inflammation.
These aging MSCs contribute to the joint’s inability to regenerate cartilage, disrupt the essential support structure of tissues, and create an imbalance in the inflammatory environment within the joint. Scientists are exploring new ways to combat this, such as removing these senescent cells, restoring their metabolic and mitochondrial health, using tiny therapeutic packages released by MSCs called exosomes, and developing advanced methods for growing and delivering these cells. Understanding and targeting the aging of these stem cells offers promising avenues for developing new treatments for knee osteoarthritis.
Source: link to paper