The Love And Hate Relationship Between Cellular Senescence And Stemness
Our bodies are made of countless cells, and they all play different roles. Two important states cells can be in are “senescence” and “stemness.” Senescence refers to cells that have stopped dividing, often due to stress or aging. Think of them as retired cells that can prevent the spread of damaged or potentially harmful cells, like those that could turn cancerous.
On the other hand, “stemness” describes the unique abilities of stem cells. These are like master cells that can both make copies of themselves and transform into many different types of specialized cells, essential for repairing tissues and maintaining our health.
While these two cellular states seem to be complete opposites—one stopping division and the other promoting it—research shows they have a surprisingly intricate connection. In some situations, they are indeed at odds, with senescent cells actively working to suppress the uncontrolled growth that stem cells might otherwise enable.
However, in other contexts, particularly in diseases like cancer, these two states can surprisingly cooperate. For instance, cells that have entered a senescent state can sometimes create an environment that actually encourages nearby cancer cells to gain “stem-like” properties. These “cancer stem cells” are often more resistant to treatments and can contribute to the recurrence and spread of tumors.
Understanding this “love and hate” dynamic between aging cells and stem cell characteristics is vital. By unraveling when and how these interactions occur, scientists hope to develop new strategies to combat aging-related diseases and improve cancer therapies.
Source: link to paper