Once a senescent cell has done it’s job (a variety of jobs) it hangs around until it or you die. So what is the “natural” process of managing SNC’s? and does that natural process function properly as we age?
According to the studies, those particular senolytic compounds don’t “suppress” they clear, i.e. kill senescent cells (SNC)
Those particular senolytics, DQ and Fisetin are tissue/cell specific. They do not kill senescent cells in every tissue type, they are not systemic. There are about 240 cell types, most but not all can be induced into senescence. The SNC’s comprising adipose and endothelial tissues are the ones that are cleared by D+Q and Fisetin.
From what little I know, FOX04-DRI is the only universal senolytic compound, fortunately it is highly selective and appears to be “safe” in how it functions. I have not grown a horn or had a hang nail since I used it the end of Jan 2025.
When a cell is diverted into becoming senescent, it’s not specifically to “prevent” cancer as cells can become senescent from a wide variety of processes. Our immune system fights cancer directly, not just as a function of senescence.
Inducing existing cancer cells to become senescent with the objective of clearing them with targeted senolytics is a current line of research.
Once a cell becomes senescent the immune systems is supposed to remove it. When we are young our immune system is robust enough to do that and keeps the senescent cell count low. We are in fact born with some senescent cells.
As the number of senescent cells increase, these immortal cells secrete more SASP. As you have noted, SASP is the main issue. Four of these secretions are recruiters, they induce nearby healthy cells to become SNC’s and this is part of the cascade effect.
I have posted previously about the Threshold Theory of Senescence, which in a nut shell, is to try and maintain SNC’s below the harmful level throughout our lives and that becomes more important/difficult as we pass 50.
Of the 12 Hallmarks of Aging, Senescence has an effect on 9 of the other 12, only mitochondrial dysfunction is close at 8.
If one can manage senescence and mitochondrial dysfunction, one should have and excellent base to increase one’s health span.