The big advance:
The big advance: we inherit many traumas of past generations and these are the genes that the transmettentLes traumatic events caused changes in the DNA.
Atlantico: Experiments on mice by an Atlanta University research team have shown that traumatic events caused changes in the DNA found in sperm and affect the brain and the behavior of generations (see here). According to Professor Marcus Pembrey, of University College London, these findings are transposable to men. Our DNA can it actually be modified by trauma?
Pierre Roubertoux: First note that this study is well built, and for once it is not content to observe the peeling of the mouse, but the nervous system (neurons and behavior).
also note that this is not really the DNA that is modified, but the transcription of genes. Because what affects the functioning of the cell, the protein. We know that many phenomena that are at the level of the genome involved in transcription.
So that the genome will tell the gene received from your parents different things from those expected from broodstock gene. This is called epigenetics.
These genetic factors that modify other genes can be modified, in the long term by our environment. The best known epigenetic mechanisms is methylation: chromatin containing DNA will be compacted and kept in this state by the same methylation. For it « unpacks », another mechanism involved, the acetylation. These mechanisms can be modulated by the environment.