Blood of world's oldest woman hints at limits of life
J Thoendell stashed this in Science
What they found suggests, as we could perhaps expect, that our lifespan might ultimately be limited by the capacity for stem cells to keep replenishing tissues day in day out. Once the stem cells reach a state of exhaustion that imposes a limit on their own lifespan, they themselves gradually die out and steadily diminish the body's capacity to keep regenerating vital tissues and cells, such as blood.
In van Andel-Schipper's case, it seemed that in the twilight of her life, about two-thirds of the white blood cells remaining in her body at death originated from just two stem cells, implying that most or all of the blood stem cells she started life with had already burned out and died."Is there a limit to the number of stem cell divisions, and does that imply that there's a limit to human life?" asks Henne Holstege of the VU University Medical Center in Amsterdam, the Netherlands, who headed the research team. "Or can you get round that by replenishment with cells saved from earlier in your life?" she says.
This seems like it could definitely be solved in the future, by banking and then replicating our stem cells.
Or by repairing damaged stem cells before they die. Many possibilities, actually.
Go down and get a stem cell injection, right?http://www.the-scientist.com/?articles.view/articleNo/41827/title/Stem-Cell-Divisions-Help-Explain-Cancer-Risk/here is more info on the issue at hand. the issue has been extensively studied.
Now I want to get stem cell injections on a regular basis. They sound lovely.