For me
it sounds a bit crazy, but experiments on mice have shown that it is possible
to rejuvenate the brains of old animals by injecting them with blood from the
young.
Scientists from Stanford University found that blood from young mice
reversed some of the effects of ageing in the older mice, improving learning
and memory to a level comparable with much younger animals. This technique
could one day help people stave off the worst effects of ageing, including
conditions such as Alzheimer's.
They connected the circulatory systems of an old and young mouse so that
their blood could mingle, after that several clear signs were found that the
ageing process had slowed down. The number of stem cells in the brain, for
example, had increased. More important, researchers found a 20% increase in
connections between brain cells.
He took blood plasma – the fluid portion of blood that is not cells –
from two-month-old mice and injected small amounts, around 5% of the total
amount of blood in a mouse by volume, into 18-month-old animals eight times
over the course of a month.
Author said that the young blood most likely reversed ageing by topping
up levels of key chemical factors that tend to decline in the blood as animals
age. Which factors in particular are causing the effect is unclear since there
are hundreds of thousands in blood.
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