“Nerve cells do not regenerate.” This expression is known to everyone. But there was already a lot of research on this topic and it was possible to prove that this is far from the case. Moreover, in a recent survey published in the journal Cell Stem Cell, it is argued that nerve cells can not only restore their structure, but also be formed anew. And even in a rather old age. Only these cells are still slightly different from those that appeared at a young age.
In general, it should be said that the study of the processes of recovery and the formation of new cells is a rather promising line of research, called “neurogenesis”. Researchers from Columbia University, led by neuroscientist Maura Boldrini, worked in this direction. For their research, they used hippocampal tissue samples from 28 people aged 14 to 79 years. Using a visualization method called confocal microscopy, scientists were able to determine the speed with which new nerve cells were formed in humans, and also to prove that lifelong neurons form in the hippocampus.
“According to research done in mice and confirmed in the study of human tissues, pluripotent stem cells are present in the area of the dentate fascia of the brain. And even though their number is limited, they can follow the path of formation of new neurons. ”
Scientists called the maternal cage of the dentate fascia“ maternal ”, and those that evolved from them are“ daughter ”. And the most interesting thing is that with age the number of “parent” cells decreases, but there are no “daughter” cells and they can freely share. At the same time, however, the older a person is, the fewer connections new cells can form.
“New neurons that appear in adulthood are less in contact with each other, form fewer connections, and less likely migrate to other parts of the brain.”